CHECKS AND ADJUSTMENTS | 37
DO NOT hold the pump over relief (lever engaged at the end
of the cylinder stroke) longer than 30 seconds at a time. Pro-
longed relief time could cause severe pump damage from internal overheating.
BODY VALVE MAIN RELIEF PRESSURE CHECK
1. Install a 0-4,000 PSI test gauge on the 2 spool valve assembly test port.
2. Press the engine speed-up button located directly above the 2 spool valve assembly. At the
same time pull the ejector panel lever to fully retract the ejector panel. Once the panel is
“dead-headed,” keep the ejector lever actuated. The pressure gauge should read 2,700 PSI.
IF NOT
3) Adjust the 2 spool valve main relief pressure.
A) Loosen the locknut on the main relief cartridge, located to the right of the tailgate
lever.
B) Insert an Allen wrench and turn the adjustment clockwise to increase pressure, or
counter-clockwise to decrease the pressure.
4) Repeat step 2 to check the main relief pressure setting.
RESISTANCE CARTRIDGE PRESSURE CHECK
(CHECKING THE RESISTANCE CARTRIDGE REQUIRES THE USE OF AN EXTERNAL HYDRAULIC POWER SOURCE)
1) Install a 0-4,000 PSI test gauge on the body valve assembly test port.
2) Install the external hydraulic power source to the pack extend pressure hose returning to the
2 spool valve. Ensure that the open cylinder port is plugged. Next, begin applying hydraulic
pressure to the extend line. Build pressure until 1,100 PSI is reached. If the resistance car-
tridge is working properly the pressure should not go beyond 1,100 PSI
IF NOT
3) Adjust the resistance cartridge pressure.
C) Loosen the locknut on the resistance cartridge, located on the eject section of the
main body valve.
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