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 switch so that 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
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.
to the ground, stop engine and engage parking brake.
Remove key from the ignition switch.
Park machine on a level surface. Lower cutting deck
2.
Make sure all hydraulic connections, lines and com-
ponents are tight.
12.If
cylinder does move in fifteen (15) seconds, pro-
ceed to step 13.
3.
Ifcomponentfailurewassevereorthesystemiscon-
taminated, flush and refill hydraulic system and reser-
voir (see Flush Hydraulic System in this section).
13.Operate
directions. The wheels off the ground should rotate in
the proper direction.
thetractionpedalintheforwardandreverse
4.
Make sure hydraulic reservoir is full. Add correct hy-
draulic oil if necessary.
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.
5.
Check control rod to the piston (traction) pump for
proper adjustment, binding or broken parts.
B. If the wheels rotate in the proper direction, stop
engine.
6.
solenoid to prevent the engine from starting.
Disconnect wire harness connector from engine run
14.Adjust
15.Check
traction pedal to the neutral position.
operation of the traction neutral switch.
7.
Make sure traction pedal and lift control lever are in
theneutralposition.Turnignitionkeyswitchandengage
starter for ten (10) seconds to prime the traction and
gear pumps. Wait fifteen (15) seconds to allow the start-
er motor to cool and then repeat cranking procedure
again.
16.Remove
to the ground. Remove chocks from remaining wheels.
jack stands from frame and lower machine
17.If
was replaced or rebuilt, run the machine so all wheels
turn slowly for ten (10) minutes.
the piston (traction) pump or a wheel or axle motor
8.
noid.
Connect wire harness connector to engine run sole-
18.Operate
load to full over a ten (10) minute period.
machine by gradually increasing it’s work
WARNING
19.Stop
ifnecessary.Check hydraulic components for leaks and
tighten any loose connections.
the machine. Check hydraulic reservoir and fill
Beforejackingupthemachine,reviewandfollow
Jacking Instructions in Chapter 1 -- Safety.
9.
Raise one front and one rear wheel off the ground
and place support jack stands under the frame. Chock
remaining 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.
Groundsmaster 4100--D/4110--D
Page 4 -- 77
Hydraulic System
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