Charge Hydraulic System
NOTE: When initially starting the hydraulic system with
new or rebuilt components such as motors, pumps, or
lift cylinders, it is important that the hydraulic system be
charged properly. Air must be purged from the system
and its components to reduce the chance of damage.
11.After the hydraulic system starts to show signs of fill,
actuate lift control lever until the lift cylinder rod moves
in and out several times. If the cylinder rod does not
move after 15 seconds, or the pump emits abnormal
sounds, shut the engine off immediately and determine
cause or problem. Inspect for the following:
IMPORTANT: Change hydraulic oil filter whenever
hydraulic components are repaired or replaced.
A. Loose filter or suction lines.
B. Blocked suction line.
C. Faulty charge relief valve.
D. Faulty gear pump.
1.
decks,stopengine,andengageparkingbrake.Remove
key from the ignition switch.
Park machine on a level surface. Lower cutting
2.
Make sure all hydraulic connections, lines, and com-
ponents are tight.
12.If
cylinder does move in 15 seconds, proceed to
step 13.
3.
Ifcomponentfailurewassevereorthesystemiscon-
taminated, flush and refill hydraulic system and reser-
voir (see Flush Hydraulic System in the Service and
Repairs section of this chapter).
13.Operate
directions. The wheels off the ground should rotate in
the proper direction.
thetractionpedalintheforwardandreverse
4.
draulic oil if necessary (see Operator’s Manual).
Make sure hydraulic reservoir is full. Add correct hy-
A. If the wheels rotate in the wrong direction, stop
engine, remove lines from bottom of piston (traction)
pump, and reverse the connections.
5.
Disconnect engine run solenoid lead to prevent the
engine from starting.
B. If the wheels rotate in the proper direction, stop
engine.
6.
Check control rod to the piston (traction) pump for
proper adjustment, binding, or broken parts.
14.Adjust
traction pedal to the neutral position (see Op-
erator’s Manual).
7.
Make sure traction pedal and lift control lever are in
the neutral position. Turn ignition key switch; engage
starter for fifteen (15) seconds to prime the traction and
gear pumps.
15.Check
Operator’s Manual).
operation of the traction interlock switch (see
16.Remove
ground. Remove chocks from remaining wheels.
blocksfromframeandlowermachine tothe
8.
Reconnect engine run solenoid lead.
17.If
was replaced or rebuilt, run the machine so all wheels
turn slowly for 10 minutes.
the piston (traction) pump or a wheel or axle motor
WARNING
Beforejackingupthemachine,reviewandfollow
Jacking Instructions in Chapter 1 -- Safety.
18.Operate
load to full over a 10 minute period.
machine by gradually increasing it’s work
9.
Raise one front and one rear wheel off the ground,
and place support blocks under the frame. Chock re-
maining wheels to prevent movement of the machine.
19.Stop
ifnecessary.Check hydraulic components for leaks and
tighten any loose connections.
the machine. Check hydraulic reservoir and fill
10.Make
sure traction pedal and lift control lever are in
neutral. Start engine and run it at low idle (1375 + 50
RPM). The charge pump should pick up oil and fill the
hydraulic system. If there is no indication of fill in 30 se-
conds, stop the engine and determine the cause.
Groundsmaster 4100--D
Page 4 -- 51
Hydraulic System
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