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Groundsmaster 5900/5910 Hydraulic SystemPage 4 -- 65
12.Raise one front and one rear wheel off the ground
and place appropriate jackstands under the frame to
support the machine. Chock remaining wheels to pre-
vent movement of the machine.
13.Make sure traction pedal is in the neutral position.
Start engine and run it at low idle speed (1350 RPM).
The charge pump should pick up oil and fill the hydraulic
system. If there is no indication of fill in 30 seconds, stop
the engine and determine the cause.
14.After the hydraulic system starts to show signs of fill,
actuate lift control switches until the lift cylinders extend
and retract several times. If the cylinders do not move
after fifteen (15) seconds or the gear pump emits abnor-
mal s ounds, shut the engine off immediately and deter-
mine cause or problem. Inspect for loosefilter or suction
lines, blocked suction line, faulty charge relief valve or
faulty gear pump.
15.If lift cylinders do move in fifteen (15) seconds, pro-
ceed to step 16.
16.Operate the traction pedal in theforward andreverse
directions. The wheels off the ground should rotate in
the proper direction.
A. If the wheels rotate in the wrong direction, stop
engine and inspect hydraulic line placement at pis-
ton (traction) pump and wheel motors. Correct hy-
draulic line installation before proceeding.
B. If the wheels rotate in the proper direction, stop
engine.
17.Use Info Center to check for traction neutral position
and interlock switch operation.
18.Remove jackstands from frame and lower machine
to the ground. Remove chocks from remaining wheels.
19.If the piston (traction) pump or a wheel motor was re-
placed or rebuilt, run the machine so all wheels turn
slowly for ten (10) minutes.
20.Operate machine by gradually increasing it’s work
load to full over a ten (10) minute period.
21.Stop the machine. Check hydraulic reservoir and fill
if necessary.Check hydraulic components for leaks and
tighten any loose connections.
Hydraulic
System