rexroth hydraulic pump adjustment in stock

To that end, GCC, industry experts in the disciplines of hydraulics, pneumatics, automation, fluid conveyance, integrated systems and service and repair, have put together these instructional videos surrounding some key functions of the A11VLO.

In the first, you’ll find necessary equipment for adjusting the load-sense pumps on the A11VLO, then find a quick, five-step walkthrough of exactly how the process is completed from start to finish.

To learn more about the Bosch Rexroth A11VLO, including data sheets, instructional manuals, information about spare parts and repair, and ordering instructions, you can head over to Bosch Rexroth’s product page here.

Rexroth’s complete line of hydraulic pumps serve virtually every industry in manufacturing and technology applications such as railway engineering, chemical process plants, power and environmental engineering, automotive engineering, plastics processing machinery, paper industry, presses, test rigs and simulation systems, marine/offshore engineering, special projects, and civil/water engineering, transportation technology, and machine tools.

Pursuing a comprehensive understanding of these application areas and working closely with customers, our engineers have developed unique electrohydraulic innovations in control technology. The result is hydraulic pumps with greater precision, dependability, and reliability.

Keeping a market expectations mindset, Bosch Rexroth is setting a new standard for hydraulic pumps with continuous development at the highest standards and quality. Rexroth pumps are designed for high reliability and efficiency.

The lineup of pumps includes: Axial Piston Pumps, External Gear Pumps, Internal Gear Pumps, Gerotor Pumps, Vane Pumps, Radial Piston Pumps and Electro-hydraulic Pumps.

Rexroth pumps are designed as a solution point of view where the products are compatible with each other in order to provide a whole portfolio for our customers.

To help keep your systems operating safely and at maximum efficiency, Rexroth offers a wide range of pump accessories. Replacement seals, safety valve, mounting flanges, brackets, and adapters make installation easier and faster.

Continuous development within hydraulic pumps industry and latest technologies at the highest level of development Bosch Rexroth will always provide the best matched reliable products for your business.

A rigid suction pipe of big size. In general, piston pumps suck very badly, it is necessary either to force-feed them or to put them in charge (oil enters the pump by gravity).

A hose drain hose on the underside of the pump needed to evacuate internal leaks as well as the flow generated by the movement of the servo-piston when the pump changes displacement.

Rotating Group Adjustment Instructions for SIS Information Bosch Rexroth Hydraulic Pumps and Motors General Service Information {3203, 4351, 5058, 5070} Caterpillar Schematic Specifications Ads by Systems Operation Send feedback Why this ad? Download Now Testing and Adjusting

Electric Rope Shovel Allhttps://ch-part.com/i.caterpillar/i01905156/ 1/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Track-Type Loader Allhttps://ch-part.com/i.caterpillar/i01905156/ 2/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Added part number 437-5508 Plug for A11 145cc pump to "Lift-Off Clearance Adjustment - A11VO/A11VLO" 09 section of document.

Changed title from "Rotating Group Adjustment Instructions for Bosch Rexroth Pumps and Motors" to "Rotating 08 Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors".

07 Added part number 372-6544 Gauge Plate for A8 200 cc pump to "Lift-Off Clearance Adjustment - A8VO" section of document.

Made Major changes to "Lift-Off Clearance Adjustment - A6VM/A6VE 200/250/355 cc with the Type 2 Barrel" and "Lift-Off Clearance Adjustment - A8VO" sections.

Removed part number 149-4932 Gauge Plate for A8 160 cc pump from "Lift-Off Clearance Adjustment - A8VO" 06 section of document.

https://ch-part.com/i.caterpillar/i01905156/ 3/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

This special instruction standardizes the instructions for the adjustment of the rotating group for Bosch Rexroth hydraulic piston pumps and motors. This document will be a source to find the instructions for the adjustment of the rotating group for all Caterpillar equipment that incorporates Bosch Rexroth hydraulic piston pumps and motors.

Summary This special instruction standardizes the instructions for the adjustment of the rotating group for Bosch Rexroth hydraulic piston pumps and motors. This document will be a source to find the instructions for the adjustment of the rotating group for all Caterpillar equipment that incorporates Bosch Rexroth hydraulic piston pumps and motors.

https://ch-part.com/i.caterpillar/i01905156/ 4/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

The information, the specifications, and the illustrations that exist in this guideline are based on information which was available at the time of publication. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete, most current information before you start any job. Caterpillar dealers can supply the most current information.

Type Code Breakdown Pumps manufactured by Bosch Rexroth may be labeled several different ways including: Brueninghaus Hydromatik GMBD, Mannesmann Rexroth, Rexroth Corp. the Mobile Hydraulic Division, Rexroth-Sigma, or Uchida Hydraulics Co. LTD. Bosch Rexroth has a group of numbers and letters attached to each pump known as pump identification or a pump description. The typical pump or motor description can be broken down as follows:

Document Coveragehttps://ch-part.com/i.caterpillar/i01905156/ 5/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Due to the extensive use of Bosch Rexroth pumps and motors in Caterpillar Equipment, it would not be feasible to list all of the associated Caterpillar part numbers. The identification refers to the family of the motor or pump, the displacement in cubic centimeters, and the series.

Illustration 3 g01009274 Tooling for the A2FM/A2FE/A2FO/A8VO pump and motor adjustment for the bearing preload.

https://ch-part.com/i.caterpillar/i01905156/ 6/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 4 g01009308 FT2739 Measuring Plate Group Tooling for the 28-160 cc A2FM/A2FE/A2FO pump and motor adjustment for the lift-off clearance. (1) 6V-4832 Screw (2) 126-7181 Sliding Plate (3) 1P-0456 Drive Plate (4) 6V-3009 Cross Bar

https://ch-part.com/i.caterpillar/i01905156/ 7/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

FT2786 Measuring Plate Group Tooling for the adjustment for the lift-off clearance for the A2FM/A2FE/A2FO 180-250 cc motors and pumps. (5) 5P-8715 Forcing Bolt (6) 5B-0637 Nut (7) 3H-0465 Puller Plate (8) 1U-9895 Crossblock (9) 1P-0456 Drive Plate (10) FT2786 Measuring Plate Group

Rotating Group Adjustments A2FM/A2FE Motors and A2FO Pumps for "Old Style" with a Spanner Nut Old style A2FM/A2FE motors and A2FO pumps require a spanner nut to set the bearing preload and the rotating torques. Cup springs and a shim are used to set the "lift off" clearance between the barrel and the port plate. New style A2FM/A2FE motors and A2FO pumps use a snap ring for the bearing preload and a center spring for the "lift-off" clearance.

Illustration 6 g01118952 "Old Style" A2FM/A2FE Motor and A2FO Pump (1) Spanner nut (2) Cup springs

Bearing Preload Adjustment for the A2FM/A2FE/A2FO "Old Style" This section shows the proper way to set the bearing preload. If bearing preload is too high or low, bearing life will be shortened due to heat generation. Additionally, if bearing preload is too high the rotating torque will be too high causing poor system operation.

https://ch-part.com/i.caterpillar/i01905156/ 8/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 7 g01011046 Bearing group of the "old style" A2FM/A2FE motor and A2FO pump (1) Spanner nut (3) Bolt (4) Upper Bearing (5) Lower Bearing

https://ch-part.com/i.caterpillar/i01905156/ 9/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 9 g01118959 Bearing group of "old style" A2FM/A2FE motor and A2FO pump (1) Spanner nut (6) Snap ring (7) Front cover (8) Shim

https://ch-part.com/i.caterpillar/i01905156/ 10/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Lift-Off Clearance Adjustment - A2FM/A2FE/A2FO "Old Style" This adjustment measures the allowable separation between the port plate and the barrel. The "lift-off" clearance or the allowable separation can be adjusted by adding or removing shims from the spring cup group in the center pin bore. Excessive leakage will occur during high-pressure spikes which may lead to rotary group damage and poor system performance if the allowable separation is too large.

https://ch-part.com/i.caterpillar/i01905156/ 11/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 10 g01139759 The typical lift-off clearance (F) measurement (2) Cup spring set (9) Port plate (10) Housing (11) Adjustment shim (12) Barrel (13) Center pin (14) Measuring plate group (15) Piston retaining plate (16) Drive plates (3)

Illustration 12 g01010870 The arrangement of the 4 cup springs for A2FO pumps.

https://ch-part.com/i.caterpillar/i01905156/ 12/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

https://ch-part.com/i.caterpillar/i01905156/ 13/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

https://ch-part.com/i.caterpillar/i01905156/ 14/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

A2FM/A2FE Motor and A2FO Pumps - "New Style" With a Snap Ring The new style A2FM/A2FE motors and the A2FO pumps use a snap ring and shims to set the bearing preload. A single coil spring and the shim are used to set the lift off clearance between the barrel and the port plate. Old style A2FM/A2FE motors and A2FO pumps use a spanner nut to set bearing preload and a cup spring set to adjust "lift-off" clearance.

Illustration 13 g00992929 "New Style" A2FM/A2FE motor and A2FO pump (1) Snap ring (2) Center spring

Bearing Preload Adjustment - A2FM/A2FE/A2FO "New Style" Bearings for the "new style" motors and the "new style" pumps are received as a kit. The kit includes bearings, adjustment shims, and a retaining clip. This kit sets the necessary bearing preload.

https://ch-part.com/i.caterpillar/i01905156/ 15/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 14 g01150537 (1) Snap ring (3) Snap ring (4) Front cover (5) Adjustment shim (6) Bearing kit

5. Take dimension (C) from Table 9 minus measured dimension (A) minus measured dimension (B) to find the required thickness for the adjustment shim. Refer to Table 10 for the adjustment shim thickness and associated part numbers. dimension (C) - dimension (A) - dimension (B) = required shim thickness (5).

https://ch-part.com/i.caterpillar/i01905156/ 16/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Lift-Off Clearance Adjustment - A2FM/A2FE/A2FO "New Style" This adjustment measures allowable separation between the port plate and the barrel. The "lift off" clearance or the allowable separation can be adjusted by adding or removing shims from the spring group in the center pin bore. Excessive leakage will occur at high-pressure spikes if the allowable separation is too large. The excessive leakage may lead to rotary group damage and poor system performance.

https://ch-part.com/i.caterpillar/i01905156/ 17/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 15 g01011150 The typical lift-off clearance (F) measurement (2) Center spring (7) Port plate (8) Housing (9) Adjustment shim (10) Barrel (11) Center pin (12) Measuring plate group (13) Piston retaining plate (14) Drive plates (3)

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17. Tighten the forcing bolt until center spring (2) compresses and center pin (11) contacts the adjustment shim (9). Note: Do not use excessive force once resistance is met.

https://ch-part.com/i.caterpillar/i01905156/ 19/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

A4VG - Series 32 Lift-Off Clearance Adjustment - A4VG This adjustment measures allowable separation between the port plate and the barrel. The "lift-off" clearance or the allowable separation can be adjusted by adding or removing shims from the center spring under the ball joint. Excessive leakage will occur at high-pressure spikes if the allowable separation is too large. Excessive leakage may lead to rotary group damage and poor system performance.

https://ch-part.com/i.caterpillar/i01905156/ 20/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 16 g01010526 Typical A4VG pump (1) Piston retaining ring (2) Ball joint (3) Adjustment shims (4) Spring group (5) Barrel (6) Port Plate

https://ch-part.com/i.caterpillar/i01905156/ 21/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

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https://ch-part.com/i.caterpillar/i01905156/ 23/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Bearing Preload Adjustment - A6VM/A6VE 55/140/160 cc The bearings are received in a kit. The kit includes bearings, adjustment shim, and the retaining clip. This kit sets the necessary bearing preload.

Bearing Preload Adjustment - A6VM 200 cc This section shows the proper way to set the bearing preload. If bearing preload is too high or low, bearing life will be shortened due to excessive heat generation. Additionally, if bearing preload is too high the rotating torque will be too high resulting in poor system operation.

Illustration 19 g03779116 FT-3275 is required for bearing preload adjustment. Dimensions in millimeters.

https://ch-part.com/i.caterpillar/i01905156/ 24/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 20 g03780123 200 cc motor (1) Snap ring (2) Reference spacer (3) Upper bearing (4) Adjustment shim (5) Lower bearing The following steps will show how to preload the bearings onto the shaft.

3. Install the upper bearing (3) on top of the adjustment shim (4). Note: The following steps will use a reference spacer (2) for measurement with a feeler gauge to determine the master spacer (7) of correct thickness to ensure preload. The reference spacer (2) will later be removed after the measurement is made and replaced with the master spacer (7) of correct thickness.

https://ch-part.com/i.caterpillar/i01905156/ 25/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

https://ch-part.com/i.caterpillar/i01905156/ 26/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Bearing Preload Adjustment - A6VM/A6VE 28/80/107/200 cc This section shows the proper way to set the bearing preload. If bearing preload is too high or low, bearing life will be shortened due to heat generation. Additionally, if bearing preload is too high the rotating torque will be too high causing poor system operation.

Illustration 24 g01009587 28/80/107/200 cc motor (1) Snap ring (2) Adjustment shim (3) Upper bearing (4) Adjustment shim (5) Lower bearing

https://ch-part.com/i.caterpillar/i01905156/ 27/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

5. Install the appropriate adjustment shim (4) and install upper bearing (3) on the shaft. Note: Make sure that upper bearing is fully pressed against lower bearing.

7. Select an appropriate shim from the Table 19. The adjustment shim (4) should make the distance between the snap ring (1) and the upper bearing (3) less than 0.05 mm (0.0020 in).

https://ch-part.com/i.caterpillar/i01905156/ 28/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Bearing Preload Adjustment - A6VM/A6VE 250 cc This section shows the proper way to set the bearing preload. The bearing life will be shortened due to the heat generation if bearing preload is too high or low. Additionally, if bearing preload is too high the rotating torque will be too high causing poor system operation.

Illustration 25 g01117795 250 cc Motor (6) Snap ring (7) Required shim (8) Upper bearing (9) Adjustment shim (10) Lower bearing

3. Take dimension (C) from Table 20 minus the measured dimension (D) to find the required adjustment shim thickness. dimension (C) - dimension (D) = required shim thickness.

https://ch-part.com/i.caterpillar/i01905156/ 29/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Bearing Preload Adjustment - A6VM/A6VE 355 cc This section shows the proper way to set the bearing preload. If bearing preload is too high or low, bearing life will be shortened due to heat generation. Additionally, if bearing preload is too high the rotating torque will be too high causing poor system operation.

Illustration 26 g01117802 355 cc Motor (11) Snap ring (12) Front cover (13) Upper bearing (14) Adjustment shim (15) Lower bearing

https://ch-part.com/i.caterpillar/i01905156/ 30/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

5. Take dimension (E) from Table 22 minus measured dimension (F) minus measured dimension (G) to find the required change in the thickness of the adjustment shim (14). dimension (E) - dimension (F) = required change in shim thickness

Lift-Off Clearance Adjustment - A6VM/A6VE 28-200 cc with the Type 1 Barrel This adjustment measures the allowable separation between the port plate and the barrel. The "lift-off" clearance or the allowable separation can be adjusted by adding or removing shims from the spring group in the center pin bore. Excessive leakage will occur at high-pressure spikes which may lead to rotary group damage and poor system performance if the allowable separation is too large.

https://ch-part.com/i.caterpillar/i01905156/ 31/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 28 g01119047 Type 1 Barrel (16) Adjustment shim Lift-off clearance for a Type 1 barrel is adjusted via a shim (16). The shim (16) is placed in the center bore of the barrel.https://ch-part.com/i.caterpillar/i01905156/ 32/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

10. Tighten all of the head bolts to the specified torque while the pump shaft is turning. Note: The pump shaft must be rotated while tightening bolts to seat all components.

https://ch-part.com/i.caterpillar/i01905156/ 33/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

https://ch-part.com/i.caterpillar/i01905156/ 34/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Lift-Off Clearance Adjustment - A6VM/A6VE 200/250/355 cc with the Type 2 Barrel This adjustment measures the allowable separation between the port plate and the barrel. The "lift-off" clearance or the allowable separation can be adjusted by placing shims of different thicknesses under the screw in the Type 2 barrel. The shim sets the depth that the screw can protrude into the center pin bore of the barrel. Excessive leakage will occur at high-pressure spikes which may lead to rotary group damage and poor system performance if separation is too large.

https://ch-part.com/i.caterpillar/i01905156/ 35/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Typical lift-off clearance (J) measurement of A6VM/A6VE with type 2 barrel (23) Center pin (24) Center pin disk (25) Adjustment shim (26) Screw (27) Piston retaining plate (28) Type 2 barrel (29) Port plate

Illustration 31 g01119054 Type 2 barrel (23) Center pin (24) Center pin disk (25) Adjustment shim (26) Screw Lift-off clearance for Type 2 barrel is adjusted via shim (25) that sets the depth screw (26) can protrude into the center pin bore of the barrel.

https://ch-part.com/i.caterpillar/i01905156/ 36/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

11. Tighten all of the bolts to the specified torque while the pump shaft is turning. Note: Tighten all of the bolts while the pump shaft is rotating to seat all of the components.

https://ch-part.com/i.caterpillar/i01905156/ 37/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

https://ch-part.com/i.caterpillar/i01905156/ 38/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Bearing Preload Adjustment - A8VO 107/160 cc This section shows the proper way to set the bearing preload. Bearing life will be shortened due to heat generation if bearing preload is too high or too low. Additionally, if bearing preload is too high the rotating torque will be too high causing poor system operation.

https://ch-part.com/i.caterpillar/i01905156/ 39/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 35 g01150546 (1) Locknut (2) Adjustment shim (3) Middle bearing (4) Lower bearing

https://ch-part.com/i.caterpillar/i01905156/ 40/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Bearing Preload Adjustment - A8VO 200 cc This section shows the proper way to set the bearing preload. Bearing life will be shortened due to heat generation if bearing preload is too high or low. Additionally, if bearing preload is too high the rotating torque will be too high causing poor system operation.

Illustration 37 g01010155 (5) Snap ring (6) Adjustment shim (7) Upper bearing (8) Adjustment shim (9) Middle bearing (10) Lower bearing

https://ch-part.com/i.caterpillar/i01905156/ 41/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Lift-Off Clearance Adjustment - A8VO This adjustment measures the allowable separation between the port plate and the barrel. The "lift-off" clearance, or the allowable separation can be adjusted. The "lift-off" clearance or the allowable separation is adjusted by adding or removing shims from the spring group in the center pin bore. Excessive leakage will occur at high-pressure spikes which may lead to damage to the rotary group and poor system performance if the allowable separation is too large.

https://ch-part.com/i.caterpillar/i01905156/ 42/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 38 g01010213 Typical lift-off clearance measurement (11) Piston retaining plate (12) Center pin (13) Barrel (14) Port plate (15) Adjustment shim Required Equipment

https://ch-part.com/i.caterpillar/i01905156/ 43/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

10. Tighten all head bolts to the specified torque while the pump shaft is turning. Note: The pump shaft must be rotated while tightening bolts to seat all components.

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A11VO/A11VLO Lift-off Clearance Adjustment - A11VO/A11VLO This adjustment measures the allowable separation between the port plate and the barrel. The "lift-off" clearance or the allowable separation can be adjusted by adding or removing shims from the center spring under the ball joint. Excessive leakage will occur at high-pressure spikes which may lead to rotary group damage and poor system performance if the allowable separation is too large.

Illustration 41 g01010520 Typical A11VO pump (1) Piston retaining ring (2) Ball joint (3) Adjustment shim (4) Spring group (5) Barrel (6) Port Plate

https://ch-part.com/i.caterpillar/i01905156/ 46/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

5. Place the test ring (8) or test pins (8) on the barrel in place of springs. Note: The 190cc and 260cc pumps require the use of three test pins in place of the test ring. Place the three test pins around the outside diameter of the center pin bore of the barrel. The three test pins must be equally spaced around the center pin bore of the barrel.

11. Measured dimension (A) minus dimension (B) yields dimension (C). dimension (A) - dimension (B) = dimension (C)https://ch-part.com/i.caterpillar/i01905156/ 47/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

13. Select appropriate shim (3) from Table 41. Note: 130cc and 145cc pumps use one shim and one additional shim if needed for adjustment of lift-off clearance. This is shown in Table 39.

https://ch-part.com/i.caterpillar/i01905156/ 48/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

A20VLO Note: The A20VLO adjustment of the rotary group procedure for the bearing preload and the lift-off clearance adjustment uses the same procedure as the A11VO/A11VLO.

C7 On-highway Engine Water Pump - Disassemblehttps://ch-part.com/i.caterpillar/i01905156/ 49/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Variable-displacement pumps are used in hydraulic systems where the flow requirements vary. This usually means the system has several actuators and, depending on the current cycle of the machine, the number of actuators moving at a given time will fluctuate. The most common type of variable-displacement pump is the pressure-compensating pump.

Pressure-compensating pumps are designed to deliver only the amount of flow required by the system to maximize efficiency and avoid heat generation. The compensator is adjusted to a pressure somewhat higher than that required to move the system’s heaviest load.

A pressure-compensating pump will deliver its maximum flow until the system pressure reaches the compensator setting. Once the compensator setting is reached, the pump will be de-stroked to deliver only the amount of flow that will maintain the compensator setting in the line.

Whenever more flow is demanded by the system (such as would occur when an additional actuator begins to move), the pump will increase its stroke to meet the new flow demand. Whenever the system flow needs to decrease (such as when one or more actuators are stopped), the pump stroke is reduced.

When the system is stopped completely, the pump stroke is reduced almost to zero. It will stroke only a very small amount or whatever is required to maintain the compensator setting in the line, overcoming any system bypassing or leaks. While a pressure-compensating pump is efficient, the standby pressure remains high.

Adjusting a pressure-compensating pump is quite simple. With all flow blocked and the system idle, the compensator valve is adjusted to the desired pressure. However, some pressure-compensating pumps have two valves mounted on the pump body.

The two adjustments can look nearly identical. This type of pressure-compensating pump is called a load-sensing pump. The second adjustment is called either a “load-sensing” valve or “flow-compensator” valve.

A load-sensing pump is designed to reduce its pressure to a much lower standby level whenever the system is idle. This can conserve energy and reduce heat and wear in systems that spend a significant amount of time in an idle condition.

The two separate pressure adjustments allow setting the compensator valve to the required maximum system pressure and the load-sensing adjustment to a much lower standby pressure.

Whenever the system is moving a load, the high-pressure adjustment limits the system pressure. For instance, as a cylinder is extended, pressure in the system will build as necessary to move the load. Eventually, the cylinder reaches the end of its stroke, and flow is blocked.

Most load-sensing systems have a pump-loading directional-control valve of some sort that can place the system in an idle condition until it is necessary to move another load. When the pump-loading valve is shifted, the system pressure drops to the much lower load-sensing valve setting.

A load-sensing valve usually is smaller than the compensator valve and typically mounted directly on top of the compensator. The compensator valve is closer to the pump. The load-sensing valve is factory preset and normally does not need to be adjusted during the initial pump setup. In most pumps, the factory preset is approximately 200-300 pounds per square inch (psi).

The most common reason to adjust a load-sensing valve is because someone unfamiliar with the pump has mistakenly attempted to set the maximum system pressure by adjusting the load-sensing valve instead of the compensator. This not only can result in unstable system pressure but in some cases can also void any warranty on the pump.

A typical configuration of a pressure-compensating pump is shown in Figure 1. A pump-loading valve is used to determine whether the system is idle or prepared to move a load. The pump-loading valve is de-energized whenever the system is idle.

Pilot pressure on the left-hand side of the load-sensing valve is then released to the tank. The pilot line on the right-hand side of the load-sensing valve is connected to the pressure line at the pump outlet. System pressure shifts the load-sensing valve and directs pressure to reduce the pump stroke so that system pressure drops to the load-sensing setting of 300 psi, as illustrated in Figure 2.

When a load is to be moved, the pump-loading valve is energized. This directs pilot pressure to the left side of the load-sensing valve, keeping it from shifting. System pressure shifts the compensator valve to de-stroke the pump exactly the amount necessary to limit system pressure to the compensator setting, 3,000 psi as shown in Figure 3.

To make the pressure settings, always adjust the load-sensing valve first. The pump should be deadheaded by closing the manual hand valve. With the pump-loading valve de-energized, pressure will build only to the current setting of the load-sensing valve. Adjust the load-sensing valve to the desired pressure.

Once the load-sensing valve is set, energize the pump-loading valve. System pressure will then build to the current compensator setting. Adjust the compensator to the desired setting. Open the manual valve, and the system can be placed back into service.

Jack Weeks is a hydraulic instructor and consultant for GPM Hydraulic Consulting. Since 1997 he has trained thousands of electricians and mechanics in hydraulic troubleshooting methods. Jack has...

Rotating Group Adjustment Instructions for SIS Information Bosch Rexroth Hydraulic Pumps and Motors General Service Information {3203, 4351, 5058, 5070} Caterpillar Schematic Specifications Ads by Systems Operation Send feedback Why this ad? Download Now Testing and Adjusting

Electric Rope Shovel Allhttps://ch-part.com/i.caterpillar/i01905156/ 1/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Track-Type Loader Allhttps://ch-part.com/i.caterpillar/i01905156/ 2/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Added part number 437-5508 Plug for A11 145cc pump to "Lift-Off Clearance Adjustment - A11VO/A11VLO" 09 section of document.

Changed title from "Rotating Group Adjustment Instructions for Bosch Rexroth Pumps and Motors" to "Rotating 08 Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors".

07 Added part number 372-6544 Gauge Plate for A8 200 cc pump to "Lift-Off Clearance Adjustment - A8VO" section of document.

Made Major changes to "Lift-Off Clearance Adjustment - A6VM/A6VE 200/250/355 cc with the Type 2 Barrel" and "Lift-Off Clearance Adjustment - A8VO" sections.

Removed part number 149-4932 Gauge Plate for A8 160 cc pump from "Lift-Off Clearance Adjustment - A8VO" 06 section of document.

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This special instruction standardizes the instructions for the adjustment of the rotating group for Bosch Rexroth hydraulic piston pumps and motors. This document will be a source to find the instructions for the adjustment of the rotating group for all Caterpillar equipment that incorporates Bosch Rexroth hydraulic piston pumps and motors.

Summary This special instruction standardizes the instructions for the adjustment of the rotating group for Bosch Rexroth hydraulic piston pumps and motors. This document will be a source to find the instructions for the adjustment of the rotating group for all Caterpillar equipment that incorporates Bosch Rexroth hydraulic piston pumps and motors.

https://ch-part.com/i.caterpillar/i01905156/ 4/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

The information, the specifications, and the illustrations that exist in this guideline are based on information which was available at the time of publication. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete, most current information before you start any job. Caterpillar dealers can supply the most current information.

Type Code Breakdown Pumps manufactured by Bosch Rexroth may be labeled several different ways including: Brueninghaus Hydromatik GMBD, Mannesmann Rexroth, Rexroth Corp. the Mobile Hydraulic Division, Rexroth-Sigma, or Uchida Hydraulics Co. LTD. Bosch Rexroth has a group of numbers and letters attached to each pump known as pump identification or a pump description. The typical pump or motor description can be broken down as follows:

Document Coveragehttps://ch-part.com/i.caterpillar/i01905156/ 5/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Due to the extensive use of Bosch Rexroth pumps and motors in Caterpillar Equipment, it would not be feasible to list all of the associated Caterpillar part numbers. The identification refers to the family of the motor or pump, the displacement in cubic centimeters, and the series.

Illustration 3 g01009274 Tooling for the A2FM/A2FE/A2FO/A8VO pump and motor adjustment for the bearing preload.

https://ch-part.com/i.caterpillar/i01905156/ 6/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 4 g01009308 FT2739 Measuring Plate Group Tooling for the 28-160 cc A2FM/A2FE/A2FO pump and motor adjustment for the lift-off clearance. (1) 6V-4832 Screw (2) 126-7181 Sliding Plate (3) 1P-0456 Drive Plate (4) 6V-3009 Cross Bar

https://ch-part.com/i.caterpillar/i01905156/ 7/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

FT2786 Measuring Plate Group Tooling for the adjustment for the lift-off clearance for the A2FM/A2FE/A2FO 180-250 cc motors and pumps. (5) 5P-8715 Forcing Bolt (6) 5B-0637 Nut (7) 3H-0465 Puller Plate (8) 1U-9895 Crossblock (9) 1P-0456 Drive Plate (10) FT2786 Measuring Plate Group

Rotating Group Adjustments A2FM/A2FE Motors and A2FO Pumps for "Old Style" with a Spanner Nut Old style A2FM/A2FE motors and A2FO pumps require a spanner nut to set the bearing preload and the rotating torques. Cup springs and a shim are used to set the "lift off" clearance between the barrel and the port plate. New style A2FM/A2FE motors and A2FO pumps use a snap ring for the bearing preload and a center spring for the "lift-off" clearance.

Illustration 6 g01118952 "Old Style" A2FM/A2FE Motor and A2FO Pump (1) Spanner nut (2) Cup springs

Bearing Preload Adjustment for the A2FM/A2FE/A2FO "Old Style" This section shows the proper way to set the bearing preload. If bearing preload is too high or low, bearing life will be shortened due to heat generation. Additionally, if bearing preload is too high the rotating torque will be too high causing poor system operation.

https://ch-part.com/i.caterpillar/i01905156/ 8/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 7 g01011046 Bearing group of the "old style" A2FM/A2FE motor and A2FO pump (1) Spanner nut (3) Bolt (4) Upper Bearing (5) Lower Bearing

https://ch-part.com/i.caterpillar/i01905156/ 9/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 9 g01118959 Bearing group of "old style" A2FM/A2FE motor and A2FO pump (1) Spanner nut (6) Snap ring (7) Front cover (8) Shim

https://ch-part.com/i.caterpillar/i01905156/ 10/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Lift-Off Clearance Adjustment - A2FM/A2FE/A2FO "Old Style" This adjustment measures the allowable separation between the port plate and the barrel. The "lift-off" clearance or the allowable separation can be adjusted by adding or removing shims from the spring cup group in the center pin bore. Excessive leakage will occur during high-pressure spikes which may lead to rotary group damage and poor system performance if the allowable separation is too large.

https://ch-part.com/i.caterpillar/i01905156/ 11/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 10 g01139759 The typical lift-off clearance (F) measurement (2) Cup spring set (9) Port plate (10) Housing (11) Adjustment shim (12) Barrel (13) Center pin (14) Measuring plate group (15) Piston retaining plate (16) Drive plates (3)

Illustration 12 g01010870 The arrangement of the 4 cup springs for A2FO pumps.

https://ch-part.com/i.caterpillar/i01905156/ 12/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

https://ch-part.com/i.caterpillar/i01905156/ 13/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

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A2FM/A2FE Motor and A2FO Pumps - "New Style" With a Snap Ring The new style A2FM/A2FE motors and the A2FO pumps use a snap ring and shims to set the bearing preload. A single coil spring and the shim are used to set the lift off clearance between the barrel and the port plate. Old style A2FM/A2FE motors and A2FO pumps use a spanner nut to set bearing preload and a cup spring set to adjust "lift-off" clearance.

Illustration 13 g00992929 "New Style" A2FM/A2FE motor and A2FO pump (1) Snap ring (2) Center spring

Bearing Preload Adjustment - A2FM/A2FE/A2FO "New Style" Bearings for the "new style" motors and the "new style" pumps are received as a kit. The kit includes bearings, adjustment shims, and a retaining clip. This kit sets the necessary bearing preload.

https://ch-part.com/i.caterpillar/i01905156/ 15/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 14 g01150537 (1) Snap ring (3) Snap ring (4) Front cover (5) Adjustment shim (6) Bearing kit

5. Take dimension (C) from Table 9 minus measured dimension (A) minus measured dimension (B) to find the required thickness for the adjustment shim. Refer to Table 10 for the adjustment shim thickness and associated part numbers. dimension (C) - dimension (A) - dimension (B) = required shim thickness (5).

https://ch-part.com/i.caterpillar/i01905156/ 16/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Lift-Off Clearance Adjustment - A2FM/A2FE/A2FO "New Style" This adjustment measures allowable separation between the port plate and the barrel. The "lift off" clearance or the allowable separation can be adjusted by adding or removing shims from the spring group in the center pin bore. Excessive leakage will occur at high-pressure spikes if the allowable separation is too large. The excessive leakage may lead to rotary group damage and poor system performance.

https://ch-part.com/i.caterpillar/i01905156/ 17/5020.02.2021 г. Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070} Caterpillar

Illustration 15 g01011150 The typical lift-off clearance (F) measurement (2) Center spring (7) Port plate (8) Housing (9) Adjustment shim (10) Barrel (11) Center pin (12) Measuring plate group (13) Piston retaining plate (14) Drive plates (3)

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17. Tighten the forcing bolt until center spring (2) compresses and center pin (11) contacts the adjustment shim (9). Note: Do not use excessive force once resistance is met.

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