Piston Pump Neutral - Test and Adjust
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To prevent personal injury when checks are made while the machine is in operation, make sure only approved personnel are on the machine. Keep other personnel off the machine and in view of the operator. Make sure checks are done in an open area. |
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| Required Tools | ||
| Part Number | Description | Quantity |
| 8T-0855 | Pressure Gauge | 2 |
- Park the machine on a level area that is free and clear from surrounding equipment and material. Make sure that the area around the machine is clear.
- Verify that the service and parking brake systems are in good working order.
- Block the drive wheels in both directions.
- Remove the plugs from test ports (2). Install the pressure gauges.
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| Illustration 1 | g00762291 |
(1) Adjustment screw (2) Test ports (3) Electrical displacement control (EDC) | |
- Set the load controller in the MANUAL position.
- Engage the parking brake.
- Start the engine and place the machine in fourth gear. Run the engine at high idle.
- Stroke the propel pump by moving the manual control lever on top of electrical displacement control (EDC) (3) .
- Loosen the locknut on adjustment screw (1). Insert a 3 mm internal hex wrench in adjustment screw (1). Rotate the adjustment screw clockwise until the pressure increases in one of the two pressure gauges.
- While you count the number of turns, rotate the adjustment screw counterclockwise until pressure increases in the other pressure gauge.
- Rotate the adjustment screw clockwise to the midpoint. At this point, both pressure gauges should indicate identical pressures.
- While you hold the adjustment screw stationary with the internal hex wrench, tighten the locknut to a torque of 7 N·m (60 lb in).
- Slow the engine to low idle. Put the machine in neutral, and stop the engine.
- Remove the pressure gauges from the test ports. Install the plugs in the propel pump.
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