Terex Evoquip Bison 120, Руководство по эксплуатации

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Troubleshooting 10
Operations Manual
Bison 120
20-07-2018
Page 10-5
Revision 2.0
(5) Hydraulic
Fault Cause Correct Measure
Excessively noisy
pump
Low oil level causing cavitation Top up oil level
Blockage at pre pump filter Replace suction strainer
Misalignment between drive
source and pump
Correctly align drive source to
pump
Incorrect hydraulic oil
Drain hydraulic oil and replace
with correct oil
Hydraulic oil tank breather
clogged
Disassemble and clean
Pressure relief valve stuck in
open position
Disassemble, clean or replace
the spring nozzle
Contaminated hydraulic oil
Drain tank and replace hydraulic
oil
Damaged pump Replace pump
Obstruction at inlet pipe Remove obstruction
Low or erratic
pressure
Contaminants in hydraulic oil
Drain tank and replace hydraulic
oil
Worn or sticking relief valve Replace relief valve
Dirt or chip holding valve partially
open
Clean around valve. Replace
valve
Control valve relief pressure set
too low
Set relief pressure to correct level
Irregular motion of the
cylinder
Air mixed in the cylinder
Check the piping, hose and
coupling. After checking and
repair, remove air
Filters blocked Replace
No response from any
hydraulic system
Low oil level Top up hydraulic oil level
Return line element is clogged
(check blockage indicator)
Replace return line element
Damaged suction line Replace suction line pipe
Air mixed from the suction
Retighten couplings and replace
the piping as necessary
Blockage at pressure filter Replace pressure filter
Pressure relief valve stuck in
open position
Contact Evoquip
The pump does not
start
Rotating direction error
Check the rotating direction and
reconnect
Low oil level Top up oil level
Air in the system
Check and tighten hydraulic
suction hose connections
Pump seized
Check that the pump shaft
rotates, fit replacement if faulty