walker mower hydraulic pump free sample
All Hydraulic Pumps for Walker mowers at discounted prices with fast delivery. These quality pumps are made by Hydro Gear, the world leader in the manufacturing of precision drive systems for the turf industry.
Walker Manufacturing has announced the transition of the Ohio, Michigan and eastern Indiana territory distribution responsibilities from Emmett Equipment Co. (Richfield, Oh.) to Precision Work, Inc. (Port Washington, NY). “Since 2002, we have enjoyed working with the dedicated team at Emmett Equipment Co., and we are thankful for the progress they have made,” says Walker […]
Hi Dealers, Please be aware of the following part number changes that have occurred: Part number 8037-1 will now be superseded by 8768-2. The seals on the rear tire assemblies are now the same. Part number 5162-11 will now be superseded by 5162-12. Walker has changed the roller wheels on the 36/42/48/54/56 inch decks to a thicker […]
I would like to remind you that it is very important to keep your mower’s blade balanced. An unbalanced blade creates vibration, which can lead to issues such as loose hardware, oil leaks, or even broken parts. A blade-balancer can cost as little as $20 and it can save you hundreds.
Keeping it cool With this hot weather it is very important to keep your mowers engine cool. On air cooled machines keeping the engine cooling fins clean will help with cooling, but how about liquid cooled units?.. Not only do we need to keep the radiator clean and filled with antifreeze but we have […]
July Parts Tip. Hi Dealers, As you may already know, Walker is in the process of making significant changes to deck gearboxes. There are two changes Dealers should be aware of: 1. Walker has changed all Tee or center gearboxes to a keyway set up that will change the gearbox part number, but also require a new […]
Walker Manufacturing is once again about to shut down for the summer from July 24 to August 11. They will not be producing anything for 3 weeks. Precision Work, Inc. will be bringing in large truck loads of parts to satisfy most of the demand, but anything that needs to be made and is not […]
We had an MH27I (Delphi fuel system) that was running rough and surging at idling. The mower was sitting outside and hadn’t been started in about 8 months. We drained the fuel and added some fresh fuel, but found very little change. Adjusted the governor and initialized the TPS and the unit got no better, so […]
Walker has just come out with NO FLAT TIRES for the Dual Tail Wheel on the MT and MD. The part number for the No Flat Tire and Wheel is 5035-3. And each tire and wheel list at $105.14. There is no part number for a No Flat Dual Tail Wheel Assembly. Only the tire […]
As your customers bring in their Walker Mowers for spring service, remember when estimating a Walker, it is good practice to: Separate the components, such as deck, body, drive system, engine and the grass handling system. Write down all work and parts necessary so that there are no surprises when the work is done. Check […]
Hello Dealers. As you complete winter service on your Walker Mowers, remember to always check for the most recent recall and service bulletins. This is done at the Walker website here. Looking up the serial number of a Walker Mower or deck will give you all the current service related work on the specific unit.
Dealers, please take note that the Kohler EFI with the Bosch system is no longer available. But Walker is working on a new kit that will replace the ch26 with the new 25I and will be available soon! Stay tuned to PWI for all the latest updates on Walker.
Please be aware that the new pricing for Walker Parts has gone into effect on November 1. Physical price books will be sent to each Dealer and an excel formatted price list will be sent by request. Please update your prices to reflect the change to avoid confusion. If you would like an excel price […]
Hello Dealers, Are you looking for information on Walker parts? The best tool for information is at your fingertips, visit Walkerdealer.com. As a Walker dealer you have all been assigned a username and password to access all the information you need. The Parts Browser will give you pricing, availability and the option to submit orders […]
I recently saw a post on the Walker Mower Forum on Facebook that someone repaired a catcher. It was cracked on the lower frontend by the lift handles. A catcher cracks by the lift handles because the catcher shock has broken and the force when dumping stresses the plastic, causing it to crack. This usually happens […]
Dear Distributors, Please see the attached Advisory Bulletin 16254 regarding the MH Deck Support Arm Change. This bulletin will be resent to include all distributors and dealers in 10 days. Please contact us with any questions you may have. 16254 Advisory Deck Support Arm Change Bruce Tallman, Walker Mowers
People are still a bit confused about the warranty of the Eaton hydro pumps on MT, MC, and MS Walker tractors. So I just wanted to refresh the warranty procedure. If a hydro pump has failed internally (not repairable) the warranty is 3 years or 1,000 hours, full coverage. After those 1,000 hours and up […]
Hello Dealers, I would like to inform you that Walker will be going through a major change with Tee gear boxes and their corresponding U-joint shafts on decks. After our stock of shear pin gearboxes are sold out, Walker will no longer make these Tee gearboxes available again. Walker has decided to change to a […]
Hello Dealers, Walker Manufacturing annual factory shutdown period will occur from July 25 to August 12, 2016. Precision will be fully operational and we will have a fully stocked parts department, but be aware that any specialty parts that are not readily available will not be attainable until a few weeks after Walker reopens. If you […]
Precision Work, Inc., Port Washington, New York, is celebrating their 30th anniversary as a Walker Mower distributor in the northeastern U.S. They also recently reached their goal of selling 20,000 Walker mowers. Bob and Annette Oestreich (Bob passed away in 2002) pioneered the Walker Mower into their market. Today Annette and son-in-law, Jeffery Plotka and […]
Morgan Dolly, of Fort Plain, New York, and Roberta Jacobson, of Gordon, Nebraska, were both recently surprised with a brand new Walker Mower as part of the Walker Mowers B Difference Drive & Win Contest. Walker Manufacturing representatives were on hand to present the mower, including company president Bob Walker, who personally handed off the […]
After reaching the spectacular goal of 20,000 Walker Mowers sold through the PWI Dealer Network, Walker and PWI hosted a major sales conference and celebration at the world famous Sagamore Resort located in upstate New York at Lake George. The July 14-17 event included individuals and families representing some 21 Walker/PWI dealers. Walker manufacturing was […]
An integral benefit of working with a Precision Work Inc. dealer is their comprehensive training and education on all products. Each January PWI dealers attends a seminar sponsored by Walker Manufacturing and PWI. Our dealers are acquainted with new models, new developments, maintenance strategies, and financial options for equipment purchasers. They share experiences, ideas and […]
After two years of real world competitive testing the results are in… Walker Mowers are more productive than your mower. See for yourself: www.TheWalkerAdvantage.com
Combustion engines, like those found in most cars, transfer power to the vehicle’s axle, which turns the wheels. Hydrostatic transmissions found in most modern tractors and zero-turn mowers, work by transferring power from the engine to hydraulic pumps which use liquid pressure to move the wheels. There’s no need for gears, and changing speed is smooth and efficient.
Zero turn hydrostatic transmission problems can start with air in the system, a condition known as cavitation. When the pump is full of air instead of oil, it can’t generate the pressure needed to provide power. This is pretty common in zero-turn mower transmissions. After your mower has been stored for the winter, it’s a good idea to purge the transmission before use. It’s also a good first step if your motor is sluggish or slow.
If your system is purged and you still have a problem, it’s time to do a little basic troubleshooting. Start with a complete visual check of the hydraulic system.
Sluggish operation is often due to old or overused fluids. If there are no signs of fluid leaks or damage, it may be time to change your hydraulic and steering fluids.
If you need help troubleshooting your tractor’s hydraulic system, call your dealer. Their service department should be able to ask the right questions, give suggestions, and you can make an appointment for service if necessary.
Lawnmowers are one of the most essential tools in a homeowner"s arsenal. They keep our lawns tidy and help us manage outdoor spaces, but like all tools, they must be used appropriately to work effectively and last long! We want your property (whether new or old) to look its best at all times. Sometimes we can make mistakes when taking care of this task which could lead down dark paths - namely, doing 13 things listed below.
You can always appreciate the importance of checking your lawn mower"s oil before every use.It might be one small thing that saves you from having a massive problem with overheating and smoking. Still, it will also reduce wear on equipment used in this process, like engines or cutting blades- meaning they"ll last longer
That"s right, people. Your new lawnmower is ready for action and will easily cut the grass if you remember one thing: check your coolant level! If it"s low or depleted, this can lead to overheating, leading me into disastrous territory where things start acting weird.
Your mower engine needs air circulation to prevent overheating. The fins on it are designed for this purpose, yet when you clean them, they can become clogged with dirt. This clogging leads directly toward an overworked motor which is dangerous for yourself and those around you! It could cause fires.
If there"s too much gas inside the lines. So ensure everything stays clear by washing these necessary cooling devices every once in a while. Or risk having a burning sensation whenever we use our lawnmowers.
When it comes to lawn care, efficiency is vital. No one wants to spend an entire Saturday afternoon pushing a mower when they could be doing something else. That"s why many people invest in riding lawnmowers. They may cost more upfront, but the time and energy they save are well worth the investment. However, even the best mowers can run into problems if they need to be used properly.
For example, if you hit a tree stump with your zero-turn mower, you risk bent blades or damaged spindles. And if your riding lawn mower hits something significant, it could be damaged beyond repair. So if you see any signs that your mower has been running into something, it"s best to call a professional. Otherwise, you could spend more money on repairs and lose productivity in the long run.
While your mower will get the job done a lot faster than you could, this is not a very cost-effective method. You will probably end up needing a major repair. Here are some signs of a lousy mower spindle.
Mower accidents are actually quite common. In fact, according to a 2022 ScienceDirect Case Study Report, Traumatic Amputation: Healing the Acute Lawn Mower Injurythere are over 84,000 mower-related injuries every yearin the United States alone. Most of these minor accidents can still be painful - and even deadly. Following the lawn mower safety instructions in your manual is essential. And if you need help with something, please feel free to ask a professional. After all, it"s better to be safe than sorry.
It"s 7 a.m. on a Saturday, and you"re ready to tackle that lawn. The sun is just peeking over the horizon, the birds are singing, and the smell of freshly cut grass is in the air. But before you can start your mower, there"s one crucial thing you need to do: make sure your children and pets are inside the house.
Why? Because faulty safety switches and disengaged parking brakes are just two of the many hazards of lawnmowers. Every year, thousands of people are injured by lawnmowers. Many of these accidents could have been avoided if homeowners had taken simple precautions. So before you fire up your mower, take a minute to think about safety - it could save you or your loved ones from a severe accident.
After each use, cleaning your cutting deck from any grass cuttings and debris is essential. A build-up of these things can cause your lawn mower to have uneven cutting issues and clog the deck pulleys. The best way to avoid this is to hose off your cutting deck after each use.
Cleaning the deck will also help keep your cutting blades sharper for longer. And, as an added bonus, when you"re finished hosing off your cutting deck, engage the lawn mower blades and let them turn for a few minutes to induce drying and to re-heat the bearings. By taking these simple steps, you"ll extend the life of your lawn mower and have a more attractive lawn too!
As any farmer knows, critters love to make little homes in equipment. Especially when the equipment is left outdoors or in a barn for the winter. Air filter compartments can make cozy places for mice to live. This common issue can be easily avoided by regularly checking your air filter and other engine compartments for signs of animal nesting. Not only will this help to extend the life of your equipment, but it will also keep your animals safe from harm. So don"t let animals live in your mower - it"s not worth the risk.
If you"ve been using your lawn mower blades for a while, they might be getting dull. But preventative maintenance goes a long way to keep your lawn mower in good shape! Many things can make a mower blade unsafe.
Dull blade- If you need help sharpening your own mower blades or don"t have the time to do it yourself, you can always take them to a repair shop.Most shops will have a blade sharpening service that can get them back in top condition in no time.
Bent blade – If you notice your cutting height is uneven, it"s likely because your blade is bent.A bent blade will cause your mower to vibrate, ruining your bearings and scalping your yard.
Altering the blade – It"s no secret that heavy machinery can be dangerous.That"s why it"s fundamental to follow the manufacturer"s instructions when operating any machinery, including lawnmowers.
Regular maintenance is very important. Moreover, your mower and mower accessories will last much longer if they have a tune-up each year by a business that knows how to repair them properly.Following these simple steps can keep your lawn mower running smoothly for years.
Hydrostatic drives are used in a variety of applications throughout all types of industries. They are sometimes referred to as hydrostatic transmissions. Anytime one or more hydraulic motors need to be driven at variable speeds with bi-directional capability, a hydrostatic drive is often used.
Common applications include conveyors, log cranes, mobile equipment, centrifuges, chemi-washers and planers. Hydrostatic drives are some of the least understood systems because many of the components are located on or inside the hydrostatic pump assembly.
A schematic of a typical hydrostatic drive is shown in Figure 1. The bi-directional, variable displacement pump controls the direction and speed of the hydraulic motor. This type of drive is commonly called a closed-loop system. Notice how the pump’s two ports are hydraulically connected to the two ports on the motor, forming the closed loop.
A piston-type pump is always used in a hydrostatic system. The pump volume can range from zero to the maximum amount. In Figure 2, the pump swashplate is in the vertical position, which means the pump output is zero gallons per minute (GPM). The swashplate is moved by two internal cylinders, which are controlled by a separate valve or manual lever.
To drive the hydraulic motor forward (Figure 3), the bottom cylinder extends to angle the swashplate and deliver fluid out the “A” port. Oil flow is then directed to the motor for rotating the shaft. As the shaft rotates, the oil that flows out of the motor will return to the “B” port on the pump. This port will act as the suction port in this direction.
To drive the motor in reverse, the top cylinder will extend, allowing the swashplate to angle in the opposite direction (Figure 4). The “B” port will then serve as the pressure port, and the “A” port will be the suction port. The amount the swashplate angles in each direction will determine the flow from the pump.
A charge pump is mounted on the back end of the main pump. This is sometimes referred to as a replenishing pump. In some cases, the charge pump is located inside the main pump assembly. The charge pump volume is normally 10-15 percent of the main pump volume. When the main pump is in idle mode, the charge pump volume prefills the “A” and “B” ports with fluid.
The pressure will continue to build in both ports until the relief valve setting is reached. The charge pump relief is usually set between 200-300 pounds per square inch (PSI). Once the valve’s spring setting is reached, the charge pump volume will flow through the charge pump relief and into the pump case. The oil then returns to the tank through the case drain line.
The purpose of the charge pump is to provide makeup fluid to the system during operation. There are tight tolerances between the pistons and the barrel in the pump and motor. This means that some of the oil inside the pump and motor will bypass the pistons and flow back to the tank through the case drain lines.
Because of this bypassing, less oil flows out of the motor than what the main pump actually requires. The charge pump will supply makeup oil through the check valve, preventing pump cavitation. The charge pump is also used to supply oil to the spring-loaded cylinders for stroking the main pump.
The charge pump relief valve provides a flow path for the excess pump volume to return to the tank in idle mode. The relief valve is normally mounted on or near the charge pump. The outlet flow of this relief valve is usually ported into the pump case where it returns to the tank through the main pump’s case drain line.
Makeup check valves permit free flow from the charge pump to the low-pressure side of the loop. At the same time, oil in the high-pressure side is blocked to the low-pressure side by the opposite check valve. The check valves are normally accessed by removing the charge pump.
Crossport relief valves limit the maximum pressure in the system. If the motor should mechanically stall, the relief valve on the high-pressure side would open and dump fluid back to the low-pressure side of the loop, protecting the motor from overpressurizing. The valves also absorb shock spikes in the system. To best absorb the pressure spikes, the valves are generally mounted as close to the motor as possible. Depending on the system, the valves may be located on the pump, mounted in a separate block or on the hydraulic motor.
The valves typically are preset to 200 to 400 PSI above the maximum operating pressure. Some drives may have a maximum pressure override, which operates similarly to a pump compensator. When the pressure override setting is reached, the pump volume is reduced to an output of nearly zero GPM. The pump will only deliver enough oil to maintain the pressure override setting. On these systems, the pressure override is set below the crossport relief valve settings.
The speed and direction of the motor is determined by the variable displacement hydraulic pump. Maximum pressure to the motor is controlled by the crossport relief valve settings. The motor case drain flow should be checked and recorded for future troubleshooting purposes. On systems with hot oil shuttle valves, the tank port of the shuttle relief valve is sometimes ported into the hydraulic motor case drain line. With these systems, checking the case flow would not provide an accurate indication of bypassing. This occurs because excess flow in the system would combine with the bypassing in the hydraulic motor.
Record the charge pump relief valve setting. When the main pump is idle, the charge pump relief valve setting will be indicated on all gauges in the system. The exception is when a two-position hot oil shuttle valve is being used.
Check the command voltage to the amplifier and the current to the servo valve. The motor’s revolutions per minute should be recorded for a specific DC signal to the servo valve. Speed problems in hydrostatic drives are usually related to either the incoming DC signal or the servo valve. Some pumps have a displacement indicator. The indicator position should also be recorded for a specific command voltage to the amplifier.
The most common method of varying the pump volume is either by a mechanical connection or a servo valve. The mechanical control is done with a cable or other mechanical linkage. In some instances, the mechanical connection shifts a valve on the pump, which ports oil to the spring-loaded cylinders inside the pump. In other cases, the mechanical control is connected directly to the swashplate.
An operator will move a joystick or foot pedal to stroke the pump. The gallons per minute the pump delivers are directly proportional to the amount the joystick or pedal is moved. The direction of pump flow and thus the rotation of the hydraulic motor are determined by which direction the pedal or joystick is moved. If the pump is delivering fluid when the joystick or pedal is centered, then the mechanical linkage may need to be adjusted.
Most hydrostatic drives in industrial applications use a servo or proportional valve to control the main pump. The specific valve is usually mounted on the pump housing. The valve is controlled by an input signal into the valve amplifier (normally a positive and negative direct current voltage).
In Figure 1, the servo valve is shifted into the “A” position to port oil from the charge pump to the spring-loaded cylinder for stroking the pump swashplate. Once the swashplate moves proportionally to the amount the servo valve spool shifts, a mechanical feedback will block the oil flow out the servo valve. The pump swashplate will then stop moving and maintain the selected volume.
To reverse the flow direction out of the pump, a negative direct current (DC) voltage is applied to the amplifier. The valve will then shift proportionally into the “B” position and deliver fluid out the opposite port to reverse the motor.
When there is no electrical signal to the valve, the pump volume output should be zero GPM. If the hydraulic motor is drifting, either the centering springs on the cylinders need adjusting or the valve needs to be nulled.
The oil flow to the valve is filtered by a non-bypassing 3- to 10-micron element. Most servo valves also contain a small pilot filter that has a 100- to 200-micron rating. If either filter plugs, the pump will stroke very slowly or not at all.
When the motor is driven in the forward direction, the shuttle valve is shifted so the oil in the suction side of the loop is ported to the shuttle valve relief. The charge pump will deliver more oil to the pump suction side than is needed to make up for the bypassing inside the main pump and motor.
It is important that the pressure of the shuttle relief valve be set below the charge pump relief valve. If set higher, the excess charge pump fluid will dump through the charge pump relief valve at all times, bypassing the cooler. This can cause the system to overheat. The hot oil shuttle valve and relief valve generally are bolted onto the hydraulic motor. They may also be mounted in a separate block along with the crossport relief valves.
The fluid in a hydrostatic loop constantly recirculates, except for the oil flow through the shuttle relief valve. The best filter arrangement is to filter the fluid in both directions on each side of the loop. If filtering is not done in both directions, when the pump fails, the contamination from the pump can go directly into the motor or vice versa.
If the system is overheating, check the oil level in the tank, inspect the heat exchanger, check the inline pressure filters, inspect the crossport relief valves, and check the pump and motor case drains for excessive bypassing.
If there is a sluggish response, check the charge pump pressure, charge pump suction filter, charge pump relief valve, hot oil shuttle relief valve, control valve, crossport relief valves, charge pump suction filter and charge pump.
If the drive will not operate in either direction, check the oil in the tank, the control valve and linkage, the command and power supply voltages, the crossport relief valves, the charge pump pressure, the charge pump relief valve, the hot oil shuttle relief valve, the pressure override, and the pump and motor case drain lines for excessive bypassing.
This filter cleans the oil from the tank to the suction port of the charge pump. It usually is non-bypassing and has a 10-micron rating. The filter should be changed and cleaned on a regular schedule. If it becomes contaminated, the charge and main pump may cavitate.
Alan Dellinger has been a member of GPM Hydraulic Consulting’s team of instructors and consultants since 2000. He has 16 years of previous hands-on mechanical, pneumatic and hydraulic trou...
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