ENGLISH (120-501)
120
TROUBLE
CAUSE
REMEDY
* concerns only loaders
with separate control valve
TROUBLE-SHOOTING CHART
Loader does not keep the load
up when the valve is in NEU-
TRAL position
NOTE ! ! there is always a
minor internal oil leakage
(manufacturer's allowance)
Insufficient lifting- or tear out
capacity
The float function of the valve
does not work. The control
cables become deformed
Loader works slowly or is not
moving at all
Difficulty to operate valve
Oil leakage in hydraulic rams
The loader drops a little when
the lifting movement begins
External oil leakage
at valve spools
Leaking security valve
( implement function)
Damaged valve spool (too much
play between spool and hole in
valve housing)
Defective piston seal, see F
Oil pressure too low:
a) Defective oil pump
b) Defective relief valve
See point A: 1,3
Bad connection of control
cable(s)
Too little oil in hydraulic system
Damaged or incorrectly
connected quick-coupling
Faulty connection of hoses
Too small oil flow
Control cables jammed
Defective seals
Damaged piston rod
Damaged bearing / piston
Damaged barrel
Defective check valve
Defective seal
Check by disconnecting ram
hoses from valve
* Change the valve (just
changing seals is not enough)
Check oil pressure
a)before valve
b) after valve
* See the Valve's Mounting
Instructions
Fill up oil according to tractor
manufacturer's instructions
Check the quick-couplings
Connect in accordance to the
colour marking
Check the tractor hydraulics
* Check installation
When changing seals, check
that the damages aren't
caused by 2, 3 or 4
* See the Valve's Mounting
Instructions
* Change seals
(check the return pipe to tank)
1
2
3
1
2
1
1
2
3
4
1
1
2
3
4
1
1
1
2
1
1
1
2
3
4
1
1
1
1
A
B
C
D
E
F
G
H
Summary of Contents for Q 900 Series
Page 171: ...125 125 501...
