Testing And Adjusting The Transmission Pump - Hardi Presidio 2700 Service Manual

Testing and Adjusting the Transmission Pump

Charge Pressure Adjustment
1. Prepare the pump
• Connect a 580psi (40 bar) manometer on the G
(charge pressure) port of the pump.
• Connect a 8702psi (600 bar) on MA and MB
÷
Connection for G (use a JIC (SAE 37°) swivel nut run tee ¾"
male x ¾" JIC female, with a manometer connection)
2. Charge Pressure Control
• Start the Engine
• Put the engine at 2400 rpm
• In Neutral, the pressures should be 435psi (30 bar) on every manometer.
G (Charge Pressure)
MA (Backward Pressure)
MB (Forward Pressure)
• If you need to adjust the Charge Pressure with
the Charge Pressure Valve: Loosen Jamb Nut (2)
and turn Adjustment Screw (1) clockwise to
increase pressure, or turn Adjustment Screw (1)
counterclockwise to decrease pressure, then
tighten Jamb Nut (2).
Pump Pressure
435psi (30 bar)
435psi (30 bar)
435psi (30 bar)
3 - Hydraulics
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