Hydraulic System Faults - Zetor PRIMO HT 20 NC Operator's Manual

Hydraulic system faults

FAULT
Oil leaks from
pipes or hoses
Hydraulic
pressure cannot
be reduced
Hydraulic
system
Hydraulic
pressure cannot
be increased
TROUBLESHOOTING
PROBABLE CAUSE
Loose clamp

Cracked pipes

Lowering speed control lever

in stop position
Defective valve

Damaged cylinder

Damaged and trapped rotating

part of the lifting shaft
Insufficient engine speed

Insufficient transmission fluid

amount
Air is sucked into the intake

manifold
Oil filter plugged

Faulty hydraulic pump

Defective valve

Damaged cylinder

SOLUTION
Tighten

Have it repaired by an

authorized service
Set it to the lowering position

Have it repaired by an

authorized service
Have it repaired by an

authorized service
Have it repaired by an

authorized service
Set the speed to 1,000 to

1,500 rpm
Refill to the specified level

Tighten the connections If any

pipe or hose is cracked or the
seal is damaged, replace it
Clean

Have it repaired by an

authorized service
Have it repaired by an

authorized service
Have it repaired by an

authorized service
123