Toro Groundsmaster 4100-D Service Manual page 115

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. If component failure was severe or the system is 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 neutral position. Turn ignition key switch and engage
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.
8. Connect wire harness connector to engine run sole-
noid.
WARNING
Before jacking up the machine, review and follow
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
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:
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 fifteen (15) seconds, pro-
ceed to step 13.
13.Operate the traction pedal in the forward and reverse
directions. The wheels off the ground should rotate 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 neutral switch.
16.Remove jack stands 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 ten (10) minutes.
18.Operate machine by gradually increasing it's work
load to full over a ten (10) minute period.
19.Stop the machine. Check hydraulic reservoir and fill
if necessary. Check hydraulic components for leaks and
tighten any loose connections.
Page 4 - - 77 Hydraulic System