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Groundsmaster 4100--D Hydraulic SystemPage 4 -- 63
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.
IMPORTANT: Change hydraulic oil filter whenever
hydraulic components are repaired or replaced.
1. Park machine on a level surface. Lower cutting deck
to the ground, stop engine and engage parking brake.
Remove key from the ignition switch.
2. Make sure all hydraulic connections, lines and com-
ponents are tight.
3. Ifcomponent failurewassevere or thesystemis con-
taminated, flush and refill hydraulic system and reser-
voir (see Flush Hydraulic System in this section).
4. Make sure hydraulic reservoir is full. Add correct hy-
draulic oil if necessary.
5. Check control rod to the piston (traction) pump for
proper adjustment, binding or broken parts.
6. Disconnect wire harness connector from engine run
solenoid to prevent the engine from starting.
7. Make sure traction pedal and lift control lever are in
the neutralposition.Turnignition key switchandengage
starter for ten (10) seconds to prime the traction and
gear pumps. Repeat this step again.
8. Connect wire harness connector to engine run sole-
noid.
WARNING
Before jackingupthemachine,review and follow
Jacking Instructions in Chapter 1 -- Safety.
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.
10.Make sure traction pedal and lift control lever are in
neutral. Start engine and run it at low idle (1400 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.
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 fifteen (15) seconds or the pump emits ab-
normal sounds, shut the engine off immediately and de-
termine cause or problem. Inspect for the following:
A. Loose filter or suction lines.
B. Blocked suction line.
C. Faulty charge relief valve.
D. Faulty gear pump.
12.If cylinder does move in 15 seconds, proceed to
step 13.
13.Operate the traction pedalin the forward and reverse
directions. The wheels off the ground should r otate in
the proper direction.
A. If the wheels rotate in the wrong direction, stop
engine and check for proper hose connections at
traction pump and motors. Correct as needed.
B. If the wheels rotate in the proper direction, stop
engine.
14.Adjust traction pedal to the neutral position.
15.Check operation of the traction interlock switch.
16.Remove blocks from frame and lower machine to the
ground. Remove chocks from remaining wheels.
17.If the piston (traction) pump or a wheel or axle motor
was replaced or rebuilt, run the machine so all wheels
turn slowly for 10 minutes.
18.Operate machine by gradually increasing it’s work
load to full over a 10 minute period.
19.Stop the machine. Check hydraulic reservoir and fill
if necessary.Check hydraulic components for leaks and
tighten any loose connections.
Hydraulic
System