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