wright stander hydraulic pump free sample

Most Wright mowers use hydraulic pumps instead of transaxles so we can position the operator and center of gravity for maximum stability. The axial piston pumps contain a rotating set of pistons. This variable flow type pump provides accurate control of flow and pressure at all times. The ZK and MMZ models use large body pumps that can pump as much as 16ccs per revolution. Stander X, Sport X™ and Large Frame Standers® use 12cc pumps. Walk behinds, Small Frame Standers®, Stander Intensity™ and Sport Intensity™ models use 10cc pumps.

Abstract: A self-propelled lawn mower including at least one cutting blade and at least first and second rear drive wheels. Hydro pumps are provided for controlling the drive wheels. Optionally, a grass collection system may be mounted on the mower, with much of the system being located laterally rearward of the rear drive wheels so that the center of gravity of the mower is shifted rearwardly. In order to compensate for such a center of gravity shift, the respective positions of the rear drive wheels are adjustable. In certain example embodiments of this invention, the lateral position of the rear drive wheels may be selectively adjusted as desired by the operator (e.g., to move the center of gravity of the mower forward relative to the rear drive wheels in order to compensate for the added rear-heavy weight of the grass collection system).

Abstract: This invention relates to a lawn mower. In certain example embodiments, the lawn mower includes one or more of: (a) a cooling baffle for efficiently cooling a hydraulic fluid tank and/or fluid therein using air flow caused by a combustion engine used for driving mower cutting blade(s); (b) improved cockpit structure including fenders; (c) improved drive wheel(s) adjustment structure or assembly; (d) improved idler arm assembly for use in connection with the cutter deck and/or pump driving belt; and/or (e) improved hose routing structure.

Abstract: This invention relates to a lawn mower. In certain example embodiments, the lawn mower may be of the walk-behind type. In certain example embodiments of this invention, the lawn mower may have one or more of: (a) an improved handlebar weldment assembly, (b) an improved operator presence control (OPC) system and structure, (c) an improved speed control system structure, (d) an improve cam bar system for hydraulic pump control, (e) a return-to-neutral biasing system that biases hand lever(s) toward a neutral position but only from a reverse position (not from a forward position), and/or (f) an improved tracking adjustment system.

Abstract: A walk-behind lawn mower includes at least one of: (a) a latch assembly for receiving a folded-up sulky for storage during transport and the like; (b) inboard mounted control rods extending downwardly from a handle control assembly area of the mower, so that actuator shafts for the hydraulic pumps are located on inboard sides of the pumps so as to oppose one another; (c) a handle control assembly for allowing the mower to be operated in an efficient manner with operator comfort during turns and the like; and/or (d) a pump lock-out system including a lever(s) for actuating both a braking force to be applied to at least one wheel of the mower and a pump lock-out system for causing the pumps to be locked in a neutral position.

Abstract: A self-propelled lawn mower includes at least one cutting blade, at least first and second drive wheels, and hydro pumps for controlling the drive wheels. At least first and second belts are used to drive the pumps and blade(s) of the cutter deck, respectively. In certain example embodiments of this invention, the belt(s) for driving the hydro pumps is/are provided at an elevation lower than a belt(s) for driving the blade(s) of the cutter deck. In certain example embodiments of this invention, this advantageously permits the center of gravity of the mower to be lowered by permitting the hydro pumps and/or engine of the mower to be positioned at a lower elevation. In certain example embodiments, one or both of the hydro pumps is/are mounted on a pump deck which is at an elevation lower than that of the engine deck where the engine is mounted.

Abstract: A walk-behind lawn mower includes at least one of: (a) a latch assembly for receiving a folded-up sulky for storage during transport and the like; (b) inboard mounted control rods extending downwardly from a handle control assembly area of the mower, so that actuator shafts for the hydraulic pumps are located on inboard sides of the pumps so as to oppose one another; (c) a handle control assembly for allowing the mower to be operated in an efficient manner with operator comfort during turns and the like; and/or (d) a pump lock-out system including a lever(s) for actuating both a braking force to be applied to at least one wheel of the mower and a pump lock-out system for causing the pumps to be locked in a neutral position.

Abstract: This invention relates to a lawn mower. In certain example embodiments, the lawn mower includes one or more of: (a) a cooling baffle for efficiently cooling a hydraulic fluid tank and/or fluid therein using air flow caused by a combustion engine used for driving mower cutting blade(s); (b) improved cockpit structure including fenders; (c) improved drive wheel(s) adjustment structure or assembly; (d) improved idler arm assembly for use in connection with the cutter deck and/or pump driving belt; and/or (e) improved hose routing structure.

Abstract: This invention relates to a lawn mower. In certain example embodiments, the lawn mower includes one or more of: (a) a cooling baffle for efficiently cooling a hydraulic fluid tank and/or fluid therein using air flow caused by a combustion engine used for driving mower cutting blade(s); (b) improved cockpit structure including fenders; (c) improved drive wheel(s) adjustment structure or assembly; (d) improved idler arm assembly for use in connection with the cutter deck and/or pump driving belt; and/or (e) improved hose routing structure.

Abstract: A walk-behind lawn mower includes at least one of: (a) a latch assembly for receiving a folded-up sulky for storage during transport and the like; (b) inboard mounted control rods extending downwardly from a handle control assembly area of the mower, so that actuator shafts for the hydraulic pumps are located on inboard sides of the pumps so as to oppose one another; (c) a handle control assembly for allowing the mower to be operated in an efficient manner with operator comfort during turns and the like; and/or (d) a pump lock-out system including a lever(s) for actuating both a braking force to be applied to at least one wheel of the mower and a pump lock-out system for causing the pumps to be locked in a neutral position.

Abstract: A walk-behind lawn mower includes at least one of: (a) a latch assembly for receiving a folded-up sulky for storage during transport and the like; (b) inboard mounted control rods extending downwardly from a handle control assembly area of the mower, so that actuator shafts for the hydraulic pumps are located on inboard sides of the pumps so as to oppose one another; (c) a handle control assembly for allowing the mower to be operated in an efficient manner with operator comfort during turns and the like; and/or (d) a pump lock-out system including a lever(s) for actuating both a braking force to be applied to at least one wheel of the mower and a pump lock-out system for causing the pumps to be locked in a neutral position.

Abstract: A lawn mower is provided. In certain example embodiments, the lawn mower includes an improved deck lift system and/or an improved brake pump lock-out system. In certain example embodiments, a deck lift system may lift/lower the cutter deck, engine deck, engine, and handle control assembly together at the same time.

Abstract: A lawn mower is provided. In certain example embodiments, the lawn mower includes an improved steering control system/assembly and/or an improved pump control linkage system/assembly. In certain example embodiments, the The mower includes an engine deck supporting an engine that drives the at least one blade for cutting grass, the engine deck also supporting a first hydraulic pump that controls the right rear drive wheel and a second hydraulic pump that controls the left rear drive wheel. A deck lift system is for raising/lowering the engine deck relative to both a frame of the mower and a handle control assembly.

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.

[0014] a pump lockout system that is engaged to prevent the first and second pumps from being changed from a neutral state, the pump lockout system being engaged along with the braking force when an occupant or operator actuates the brake lever.

Across the mowing industry we have heard the cry for a mower that provides a smoother ride with more efficiency. To address this issue, our engineers have designed a system that is exactly what the doctor ordered! In 2020, all of our models from the RZ-HD and up feature “Parker All Hydraulic Drives” for smoother, trouble-free operation. This means there is no gear reduction, providing up to 25% more efficient performance when compared to other companies that use gear reduction hydros in their mowers.

More power? You bet! Our RZ and RZ-Pro models with Tuff-Torq have added charge pumps, as well as steel gears to provide more power and more reliability with your Spartan mower! Once again this advantage is HUGE!