Manitowoc 999 Service And Maintenance Manual page 257

999 SERVICE/MAINTENANCE MANUAL
Manually stroke travel pump with brakes applied.
(See Test 16.) Is system pressure greater than 6,000 psi?
Yes
Adjust travel speed per Shop Procedure SP9. Is correct speed obtained?
Yes
Travel system response
should be correct.
Manitowoc
Travel system response is sluggish.
POSSIBLE CAUSES
Pump or motor is faulty; Travel speed out of adjustment.
Use a gauge to check charge pressure at travel pressure senders.
300 psi or more
No
Adjust multifunction valve for 6,000 psi system pressure.
(See Test 19.) Retest with brakes applied. Is pressure ok?
Yes
Check for leakage at motor. (See Test 21.)
Normal
Check for leakage at pump. (See Test 21.)
High Leakage
Repair or replace travel pump.
Published 05-16-17, Control # 233-03
Problem 18
CHECKS
Adjust charge pressure relief for 350 psi.
(See Test 18.) Is 350 psi obtained?
No
No
High Leakage
Repair or replace travel motor.
TROUBLESHOOTING
300 psi or less
No
10
10-21