HIAB 190TM - Page 63

63
Boom do not extend
z Dirt in counter balance
valve or damage in seal
z Internal leakage in
cylinder
z Sequence valve fault
z Lack of oil
z Clean and/or change
z Repair
z Clean/repair
z Top up the oil
Boom do not retract
Dirties in counter balance
valve or damage in seal
Clean and/or change
Boom automatically retract
when loaded
z Internal leakage in
cylinder
z Some leakage at
connection parts
z Damage in check valve
z Repair
z Repair
z Clean and change the
seal
Some noise in slewing
system and/or insufficient
torque
z Damage of slewing gear
z Damage of the bearing in
the gearbox
z Pump faulty
z Insufficient oil in the
gearbox
z Motor faulty
z Change
z Change the bearing
z Repair/change pump
z Top up the gear oil
z Change motor
Jerky when slewing
z Too much clearance in
slewing gear and pinion
z Worn out of the
wormwheel in gearbox
z Loosening of the gearbox
mounting bolts
z Adjust the pinion gear
z Change the gearbox
z Tighten the bolts
Outrigger cylinder do not
extend
z Lack of oil
z Dirties in relief valve
z Top up the oil
z Clean and/or repair
Outrigger cylinder retract
when loaded
z Damage in pilot check
valve
z Internal leakage in
cylinder
z Repair/change
z Repair
Outrigger cylinder down
when driving
z Damage in pilot check
valve
z Internal leakage in
cylinder
z Leakage from the
cylinder
z Repair/change
z Repair
z Repair
Leakage in winch motor
z Drain line is clogged
z Damage of the packing
z Repair
z Repair
2
nd
boom will not retract Sequence valve faulty Repair
3
rd
boom will not extend Sequence valve faulty Repair