TM 5-3805-262-20
3-25. HYDRAULIC SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. LIFT CYLINDER ASSEMBLIES OPERATING SLUGGISHLY OR POORLY (ALL OTHER CYLINDERS
OPERATING OKAY ) (Cont).
S t e p 4 . ( C o n t ).
Place a support below loader
frame cross member to hold
loader frame in position.
Operate control levers several
times to relieve hydraulic
system pressure.
Hydraulic system pressure is over
20 0 0 p s i a n d h y d r a u l i c r e s e r v o ir
i s p r e s s u r i z e d w i t h c o m p r e s s e d
a i r . B e f o r e l o o s e n i n g o r
d i s c o n n e c t i n g a n y h y d r a u l i c
h o s e s , l i n e s , o r f i t t i n g s , l o o s e n
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 , a n d
o p e r a t e a l l h y d r a u l i c c o n t r o l
l e v e r s t o r e l i e v e h y d r a u l i c
system pressure. Failure to do so
c o u l d c a u s e s e r i o u s i n j u r y o r
death .
I f y o u a r e i n j u r e d o b t a in
medical assistance immediately.
Disconnect hose connected to
rod end of each lift cylinder
assembly from tube that comes
through side of loader front
c h a s s i s.
Install a cap on each tube.
S t a r t e n g i n e - a n d o p e r a t e a t f u l l t h r o t t l e.
Hold LIFT ARM control lever in RAISE position and tell assistant to
check for hydraulic oil leakage at each hose disconnected above.
a. If there is constant leakage from a hose, the cylinder packing
is damaged. Shut off engine and replace lift cylinder assembly
connected to hose which was constantly leaking (page 11-65).
b. If there wasn’t constant leakage from a hose, notify next higher
maintenance level to replace control valve assembly.
3-190
