CASE-ACCESSORY 2850902 - Caterpillar

Adjustment Of Output Flow Under Total Horsepower Control
Illustration 1 g00846150
(1) Locknut (2) Adjustment screw (3) Locknut (4) Adjustment screwAdjust the flow of the idler pump.
Loosen locknut (1) .
Turning adjustment screw (2) clockwise will increase the output flow of the pump. Turning adjustment screw (2) counterclockwise will decrease the output flow of the pump. A 1/4 turn of adjustment screw (2) will change the output flow of the pump at the following pressures.
The pressure range of the first regulator spring is 17800 kPa (2600 psi) to 25700 kPa (3750 psi). Output flow of the pump will change approximately 22 L/min (5.8 US gpm) if the output flow is adjusted in this pressure range.
The pressure range of the second regulator spring is 25700 kPa (3750 psi) to 34300 kPa (4950 psi). Output flow of the pump will change approximately 14 L/min (3.7 US gpm) if the output flow is adjusted in this pressure range.
Tighten locknut (1) to a torque of 12 3 N m (9 2 lb ft).
Adjust the drive pump. Use locknut (3) and adjustment screw (4) instead of locknut (1) and adjustment screw (2) to adjust the drive pump. Repeat Steps 1 through 3.Adjustment of the Maximum Output Flow of the Pump
Illustration 2 g00846151
Pump compartment (5) Locknut (6) Adjustment screw (7) Adjustment screw (8) LocknutAdjust the maximum output flow of the idler pump.
Loosen locknut (5) .
In order to adjust maximum output flow, turn adjustment screw (6). Turning adjustment screw (6) clockwise will decrease the maximum output flow of the pump. Turning adjustment screw (6) counterclockwise will increase the maximum output flow of the pump. When adjustment screw (6) is turned 1/4 turn, the flow changes approximately 3.6 L/min (1.0 US gpm).
Tighten locknut (5) to a torque of 55 10 N m (41 7 lb ft).
Adjust the maximum output flow of the drive pump. Use locknut (8) and adjustment screw (7) instead of locknut (5) and adjustment screw (6). Repeat Steps 1 through 3.