DEUTZ-FAHR FL35-70HP Series, Operation Manual

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Operation Instructions
349
The implement cannot be
lowered.
1. The main control valve or oil return valve
gets stuck.
2. The lowering speed regulating valve or
block valve is closed.
1. Operate the control handle of the
lifter for several times in a
reciprocated manner, and use a
driver to toggle the main control
valve; if it is stuck continuously,
remove it for cleaning.
2. Open the valve.
The tractor wobbles
during lifting of the
implement.
1. The non-return valve is worn, and not
closed tightly.
2. The distributor, oil cylinder and sealing
rings have oil leakage problem.
1.
Repair or replace the non-return
valve.
2. Find out the oil leakage point, and
replace the sealing ring.
During use of simple
hydraulic output, no
pressure oil is available
or the oil pressure is too
low.
1. The block valve has no cut-off oil
pipeline.
2. The force control handle or position
control handle is set at the lowering
position.
3. The external lifting arm is at the lifting
position.
4. During use of a quick-change connector,
the valve spool with a female connector or
male connector is stuck, and the oil line is
blocked.
1.
Tighten the block valve into the
housing in sequence to block the oil
line.
2. Set the force and position control
handles to the lifting position.
3. Enable the external lift arm to be at
lowering position.
4. Replace the quick-change connector
9.4.4.
9.4.4.Electric system faults and troubleshooting
Symptoms Causes Solutions