GMC HBB-0410, Operations & Parts Manual

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17
X.Troubleshooting
Troubles Possible cause Remedy
Hydraulic cylinder crawling
Hydraulic or pipe has air Start the hydraulic system and forth several times to
the maximum stroke, forced exclusion of air; seal the
pipeline and system.
Somewhere a negative
pressure in the hydraulic
cylinder
Locate a negative pressure at the hydraulic cylinder
and sealed, then exhaust the air.
Ring seal too tight Adjustment ring, so as not to loose not tight, to ensure
that the rod can be pulled back and forth by hand.
Cylinder wall or piston
surface strain, badly worn or
local corrosion
Boring the cylinder bore, the piston reassortment
Leakage of the hydraulic
cylinder
Cylinder bore and piston with
the gap due to wear resulting
in increased tolerance, rod
surface damage Repair rod damage
Seal the edges injury or aging
Replace the seals
Pipe joint is not seal tightly
Replace the seals
Hydraulic cover is not seal
tightly Check the seal contact surface machining accuracy
and aging, be replaced or repaired.
Due to poor exhaust air
temperature
adiabatic
compression cause local
damage seals
Inspect the exhaust system, or additional exhaust,
timely exhaust.
Sound and noise
1) hydraulic cylinder has air
2) Cylinder rod lack oil
1)Slow movement of the piston several times, each
time went to the top, to exclude gas tank, you can
eliminate this serious noise, but also to prevent seals
burns.
2)
cylinder rod oil can also cause less noise, this time
should be oiled at the pole.