TM 9-2350-256-20
CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
2-17 HYDRAULIC TROUBLESHOOTING-Continued
MAIN HYDRAULIC SYSTEM-Continued
Particles blown by compressed air can be
dangerous. Be certain to direct airstream
away from user and other personnel in the
area. Compressed air used for cleaning
purposes will not exceed 30 psi. Use only
with effective chip-guarding and personnel
protective equipment (goggles/shield and
gloves.
Clean hydraulic oil filter element in dry-cleaning
solvent (Appendix
D , i t e m 9 ) a n d d r y w i t h
compressed air. Install filter element and cover and
go to step B.
B Remove left- and center-front air inlet grilles (see
paragraph 9-57). Inspect power takeoff coupling to
see that drive shaft is firmly attached to power
takeoff coupling. Tighten bolts and/or replace
missing bolts and lockwashers and go to step C.
Keep hands and arms away from fan blade
and drive while engine is running, or
serious injury to personnel will result.
C Have assistant start engine. Observe power takeoff
coupling and drive shaft. If they are not turning,
remove powerplant (see paragraph 3-1). Install
holding bar and pulley (Appendix C, item 14) and
tighten power takeoff retaining nut. Torque nut to
240-250 lb-ft (1655-1724 Nom) and go to step D.
D Remove hydraulic line intermediate rear right center
floor plate (see paragraph 9-11). Remove pipe plug
from mechanical transmission and install pressure
gage (Appendix C, item 25). Operate engine at 1600
rpm. Lubricating oil pressure should be 10-19 psi
(69-131 kPa). If lubricating oil pressure is 10-19 psi
(69-131 kPa), go to step E. If lubricating oil pressure
is not 10-19 psi (69-131 kPa), notify Direct Support
Maintenance.
E Disconnect hydraulic line. Install tee and pressure
gave (Appendix C, item 25). Connect hydraulic line.
O p e r a t e e n g i n e a t 1 6 0 0 r p m . M e c h a n i c a l
2-50
Change 1
