Zetor PRIMO HT 20 NC, Operator'S Manual, Page: 124 / 134

Hydraulic system faults
FAULT PROBABLE CAUSE SOLUTION
Hydraulic
system
Oil leaks from
pipes or hoses

Loose clamp

Tighten

Cracked pipes

Have it repaired by an
authorized service
Hydraulic
pressure cannot
be reduced

Lowering speed control lever
in stop position

Set it to the lowering position

Defective valve

Have it repaired by an
authorized service

Damaged cylinder

Have it repaired by an
authorized service

Damaged and trapped rotating
part of the lifting shaft

Have it repaired by an
authorized service
Hydraulic
pressure cannot
be increased

Insufficient engine speed

Set the speed to 1,000 to
1,500 rpm

Insufficient transmission fluid
amount

Refill to the specified level

Air is sucked into the intake
manifold

Tighten the connections If any
pipe or hose is cracked or the
seal is damaged, replace it

Oil filter plugged

Clean

Faulty hydraulic pump

Have it repaired by an
authorized service

Defective valve

Have it repaired by an
authorized service

Damaged cylinder

Have it repaired by an
authorized service
TROUBLESHOOTING
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