Section 4 • Repair Procedures
Part No. 122985
S-80 • S-85 • S-80X
4 - 41
February 2012
3 Tag, disconnect and plug the hydraulic hoses
from the drive and function pumps. Cap the
fittings on the pumps.
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.
4 Support the pumps with a suitable lifting device
and remove the two drive pump mounting
fasteners.
5 Carefully pull the drive pump out until the pump
coupler separates from the flex plate.
6 Remove the drive pump assembly from the
machine.
Component damage hazard.
Be sure to open the two hydraulic
tank valves and prime the pump
after installing the pump.
Note: Before installing the pump, verify proper
pump coupler spacing. See 5-2,
Flex Plate.
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 40 bar pressure
gauge to the diagnostic nipple on the drive
pump.
2
Continental models:
If equipped, close the
valve on the LPG tank, then disconnect the
hose from the tank. Move the fuel select toggle
switch to the LPG position.
Deutz and Perkins models:
Disconnect the
engine wiring harness from the fuel solenoid at
the injector pump.
3 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.
4
Continental models:
If equipped, connect the
LPG hose to the LPG tank and open the valve
on the tank.
Deutz and
Perkins models:
Connect the
engine wiring harness to the fuel solenoid.
5 Start the engine from the ground controls and
check for hydraulic leaks.
HYDRAULIC PUMPS
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