caution - Toro
caution - Toro
caution - Toro
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Charge Hydraulic System<br />
NOTE: When initially starting the hydraulic system with<br />
new or rebuilt components such as motors, pumps or lift<br />
cylinders, it is important that the hydraulic system be<br />
charged properly. Air must be purged from the system<br />
and its components to reduce the chance of damage.<br />
IMPORTANT: Change hydraulic oil filter whenever<br />
hydraulic components are repaired or replaced.<br />
1. Park machine on a level surface. Lower cutting deck<br />
to the ground, stop engine and engage parking brake.<br />
Remove key from the ignition switch.<br />
2. Make sure all hydraulic connections, lines and components<br />
are tight.<br />
3. If component failure was severe or the system is contaminated,<br />
flush and refill hydraulic system and reservoir<br />
(see Flush Hydraulic System in this section).<br />
4. Make sure hydraulic reservoir is full. Add correct hydraulic<br />
oil if necessary.<br />
5. Check control rod to the piston (traction) pump for<br />
proper adjustment, binding or broken parts.<br />
6. Disconnect wire harness connector from engine run<br />
solenoid to prevent the engine from starting.<br />
7. Make sure traction pedal and lift control lever are in<br />
the neutral position. Turn ignition key switch and engage<br />
starter for ten (10) seconds to prime the traction and<br />
gear pumps. Repeat this step again.<br />
8. Connect wire harness connector to engine run solenoid.<br />
WARNING<br />
Before jacking up the machine, review and follow<br />
Jacking Instructions in Chapter 1 - Safety.<br />
9. Raise one front and one rear wheel off the ground<br />
and place support blocks under the frame. Chock remaining<br />
wheels to prevent movement of the machine.<br />
10.Make sure traction pedal and lift control lever are in<br />
neutral. Start engine and run it at low idle (1400 RPM).<br />
The charge pump should pick up oil and fill the hydraulic<br />
system. If there is no indication of fill in 30 seconds, stop<br />
the engine and determine the cause.<br />
11.After the hydraulic system starts to show signs of fill,<br />
actuate lift control lever until the lift cylinder rod moves<br />
in and out several times. If the cylinder rod does not<br />
move after fifteen (15) seconds or the pump emits abnormal<br />
sounds, shut the engine off immediately and determine<br />
cause or problem. Inspect for the following:<br />
A. Loose filter or suction lines.<br />
B. Blocked suction line.<br />
C. Faulty charge relief valve.<br />
D. Faulty gear pump.<br />
12.If cylinder does move in 15 seconds, proceed to<br />
step 13.<br />
13.Operate the traction pedal in the forward and reverse<br />
directions. The wheels off the ground should rotate in<br />
the proper direction.<br />
A. If the wheels rotate in the wrong direction, stop<br />
engine and check for proper hose connections at<br />
traction pump and motors. Correct as needed.<br />
B. If the wheels rotate in the proper direction, stop<br />
engine.<br />
14.Adjust traction pedal to the neutral position.<br />
15.Check operation of the traction interlock switch.<br />
16.Remove blocks from frame and lower machine to the<br />
ground. Remove chocks from remaining wheels.<br />
17.If the piston (traction) pump or a wheel or axle motor<br />
was replaced or rebuilt, run the machine so all wheels<br />
turn slowly for 10 minutes.<br />
18.Operate machine by gradually increasing it’s work<br />
load to full over a 10 minute period.<br />
19.Stop the machine. Check hydraulic reservoir and fill<br />
if necessary. Check hydraulic components for leaks and<br />
tighten any loose connections.<br />
Hydraulic<br />
System<br />
Groundsmaster 4100--D<br />
Page 4 - 63<br />
Hydraulic System