Toro Groundsmaster 4500-D Series Service Manual page 198

Charge Hydraulic System (continued)
Hydraulic System: Service and Repairs
C. Faulty charge relief valve.
D. Faulty gear pump.
9. Once the lift cylinder does move in ten (10) to fifteen (15) seconds, proceed
to step 10.
10. Operate the traction pedal in the forward and reverse directions. The wheels
should rotate in the proper direction.
A. If the wheels rotate in the wrong direction, stop engine and check for
proper hydraulic hose and electrical connections at traction pump and
motors. Correct as needed.
B. If the wheels rotate in the proper direction, stop the engine.
11. Make sure that traction pedal returns to the neutral position when released
from the forward or reverse direction.
12. Check operation of the traction interlock switch (see
Interlock Switches (page
13. With engine not running and ignition switch in the OFF position, remove jack
stands that are supporting the machine and lower the machine to the ground.
14. If the piston (traction) pump or a traction motor was replaced or rebuilt, run
the machine so all wheels turn slowly for ten (10) minutes.
15. Operate machine by gradually increasing its work load to full over a ten (10)
minute period.
16. Stop the machine. Check hydraulic reservoir and fill if necessary. Check
hydraulic components for leaks and tighten any loose connections.
6–24)).
Page 5–96
Check Operation of
Groundsmaster ® 4500-D/4700-D
19245SL Rev A