Section 4 • Repair Procedures
REV A
June 2007
Part No. 112657
GS-2668 RT • GS-3268 RT
4 - 51
How to Remove the
Hydraulic Pump
1 Tag, disconnect and plug the hydraulic hoses
on the pump.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to squirt
or spray.
2 Remove the pump mounting bolts. Carefully
remove the pump.
After replacing the hydraulic
pump, it is critical to return the lift
and drive speed settings to
original factory specifications.
Refer to Section 3,
Scheduled
Maintenance Procedures.
HYDRAULIC PUMP
How to Prime the Pump
Component damage hazard. Be
sure that the hydraulic tank shutoff
valves (if equipped) are in the
open position before priming the
pump. The engine must not be
started with the hydraulic tank
shutoff valves in the closed
position or component damage will
occur.
1 Connect a 0 to 600 psi / 0 to 50 bar pressure
gauge to either diagnostic test port on the
function manifold.
2 Turn the key switch to ground controls and pull
out the red Emergency Stop buttons to the on
position at both the ground and platform
controls.
3
Gasoline/LPG models:
Close the valve on the
LPG tank, then disconnect the hose from the
tank (if equipped). Move the fuel select toggle
switch at the ground controls to the LPG
position.
Diesel models:
Disconnect the wiring from the
fuel shutoff solenoid.
4 Crank the engine with the starter motor for
15 seconds, wait 15 seconds, then crank the
engine an additional 15 seconds or until the
pressure reaches 300 psi / 20.7 bar.
5
Gasoline/LPG models:
Connect the hose to
the LPG tank and open the valve (if equipped).
Move the fuel select toggle switch at the ground
controls to the gasoline position.
Diesel models:
Connect the wiring to the fuel
shutoff solenoid.
6 Start the engine from the ground controls and
check for hydraulic leaks.
Summary of Contents for GS-2668 RT
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