Lovol TE304 - Page 52

Index: Failure Cause Troubleshooting
causing insufficient pressure.
(5)
There is oil leakage from the
cylinder sealing ring.
(5) Replace cylinder sealing ring
3
The
agricultural
implement is
joggling
during
lifting at
slow speed.
(1) The oil filter is clogged.
(2)
There is air in the oil absorption
pipeline.
(3) Gear pump is invalid.
(4) The hydraulic oil level is too low.
(1) Replace or clean filter element
(2)
Troubleshoot the leakage at the
connector and O-ring.
(3) Replace gear pump
(4) Fill lubricant to specification.
4
After lifting
the
agricultural
implement,
it frequently
“Nods”.
Descent
speed only
under
self-weight
condition is
fast after the
engine
flameout.
(1) Distributor one-way valve sealing is
poor.
(2) The lowering valve sealing is poor.
(3) Cylinder relief valve is leaking oil
or improperly adjusted.
(4)
There is oil leakage from the
cylinder piston O- ring.
(5)
The sealing ring between the
distributor or cylinder head and oil
inlet of lifter housing is not well
installed or damaged.
(1) Clean the one-way valve and face it up
if necessary.
(2) Clean or face up the descent valve
(3) Adjust or readjust cylinder relief valve.
(4) Replace O-ring.
(5) Check and replace sealing ring
5
With the
handle at the
lifting
position, the
distributor
gives sharp
sound.
(1)
The adjustment is not correct,
causing the inner lifting arm against
lifting housing to have the relief
valve opened.
(1)
Firstly measure the lifting height of
agricultural implement, then readjust the
force/position adjusting lever to let
lifting extreme position is lower than
original position.
6
There is no
hydraulic
output at the
cylinder
head or the
hydraulic
output is
powerless.
(1) The inlet pipe to cylinder is not cut
off.
(2)
The sealing between front taper
body of the descent speed control
valve and taper hole is poor.
(3) The lifter is at neutral position
(1) Clockwise tighten the descending speed
control hand wheel.
(2) Repair and face up the sealing between
the front taper body of descending speed
control valve and taper hole. Or replace
the descend speed control valve.
(3) Push lifter control handle to “Lowering”
position in order to lower outer lift arm
to the lowest position and cut off inlet
oil line of oil tank. Then push control
handle to “Lifting” position.
3.16.1.7 Air brake system failure and troubleshooting
Table 3-9 Air brake system failure and troubleshooting
Index: Failure Cause Troubleshooting