CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTlONS
2-17 HYDRAULIC TROUBLESHOOTING-Continued
notify Direct Support Maintenance. If no leaks exist
go to step H.
H Test main winch combination control valve by
performing STE/ICE-R test No. 51 with 0-10,000
psig pressure transducer (Appendix C, item 51)
installed in test gage port No. 50 at main winch level
cylinder. Remove hose No. 21A from valve, and plug
outlet of valve (see paragraph 12-2). If no pressure is
indicated on gage when operating hydraulic system,
it indicates a faulty combination control valve. If
combination control valve is faulty, notify Direct
Support Maintenance. If combination control valve
is not faulty go to step I.
Test the main winch control valve by performing
STE/ICE-R test No. 51 with 0-10,000 psig pressure
transducer (Appendix C, item 51) installed in
combination control valve port No. 7. If no pressure
is established when actuating control valve, but
pressure is established when removing hose No. 21A
from control valve and plugging outlet, a faulty
main winch control valve is indicated. If main
winch control valve is faulty, notify. Direct Support
maintenance. If main winch control valve is not
faulty, go to step J.
If main winch still does not operate or operates with
troubleshoot main hydraulic system
and/or auxiliary hydraulic system (see paragraph
2-19). If main winch operates properly, but creeps or
fails to hold load, go to step K.
Ensure hydraulic system is at operating
K If main winch creeps or fails to hold load, adjust
brake. Open door of hydraulic valve forward right
floor plate (see paragraph 9-3). Loosen locknut (see
paragraph 11-2) and tighten main winch adjusting
screw clockwise as far as it will go.
adjusting screw one full turn. Hold adjusting screw
in position and tighten locknut. If brake fails to hold
load or creeps, go to step L.
Remove hydraulic brake cylinder hose No. 29 and
inspect for restriction (see paragraph 12-1). Replace