TM 5-3805-262-20
3-21. STEERING SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. NO RESPONSE WHEN STEERING WHEEL TURNED (Cont).
Step 3.
Check for contaminated oil in
h y d r a u l i c r e s e r v o i r.
Start and operate engine at
f u l l t h r o t t l e.
Place BUCKET control lever in
CROWD position and hold for 15
seconds then place BUCKET con-
trol lever in NEUT. position
for 30 seconds.
Repeat this procedure until
tube is warm to touch. Shut
off engine.
Slowly loosen, then remove
h y d r a u l i c r e s e r v o i r f i l l c a p.
Take an oil sample from hy-
d r a u l i c r e s e r v o i r.
a .
b.
If hydraulic oil is contaminated as indicated by oil feeling
gritty, milky color, or is dark and thick or smells scorched,
drain hydraulic system and clean strainer (page 11-79), and
replace oil filters (pages 8-40 and 11-82).
I f h y d r a u l i c o i l i s n o t c o n t a m i n a t e d , r e i n s t a l l h y d r a u l i c r e s e r-
voir fill cap and go to step 4 below.
Step 4. Check if hydraulic lift system is operating properly or if it is op-
e r a t i n g s l u g g i s h l y.
a . I f h y d r a u l i c l i f t s y s t e m i s o p e r a t i n g s l u g g i s h l y , r e p l a c e h y-
draulic filters (pages 8-40 and 11-82) and clean strainer (page
11-79).
b . I f h y d r a u l i c l i f t s y s t e m i s o p e r a t i n g p r o p e r l y , n o t i f y n e xt
higher maintenance level to perform hydraulic pump steering
s e c t i o n t e s t s .
2. SLOW OR HARD STEERING.
S t e p 1 . C h e c k t h a t a i r p r e s s u r e i s s a m e i n e a c h t i r e ( s h o u l d b e 4 0 p s i ).
a . I f a i r p r e s s u r e i s n o t s a m e i n e a c h t i r e , i n f l a t e t o 4 0 p s i.
b. If air pressure in each tire is okay, go to step 2 below.
3-141
