SECTION 3
OPERATION
July 2003
p 3-10
05132519
2 Piston Pump 32 Cap Nut
22 Compensator 33 Jam Nut
31 Allen Wrench (3mm) 34 Adjustment Screw
35 Outer Adjustment Screw
3.3.4 Hydraulic Pump Pressure Compensator Adjustment Procedure
Locate hydraulic pump compensator adjustment screw
Note that main adjustment screw is INBOARD, while outboard adjustment
screw is used for pump internal case drain pressure.
Use a 3mm Allen wrench to increase (clockwise) or decrease (counter-
clockwise) pump compensator pressure.
View a HP water pressure gage while adjusting the pump compensator.
Increase pressure slowly, while the pump is supplying HP water to a nozzle
orifice.
Verify the static HP water setting by blocking flow to the HP water nozzle(s)
either with the electrically- operated shutoff valve or by closing a suitable
hand- operated shutoff valve.