TELELIFT 3713 SX
TROUBLESHOOTING
5
14
Document 57.4402.9200 - 1
st
Edition 10/2006
INDEX
Problem
Cause
Solution
The boom lifting system doesn’t
work properly
The boom lowers jerkily
The boom sections are frequently
out of sequence when the boom is
extended/retracted
When the boom is moved up or
down, the forks cannot be levelled
Block valve of the boom internal extension
cylinder damaged.
Block valve of the boom external extension
cylinder damaged.
Diverting valve DFE
0
damaged.
Hydraulic line feeding the boom
defective.
Main valve damaged.
Boom lifting cylinder damaged.
Block valve of the boom lifting cylinder
damaged.
Block valve damaged.
Cylinder seals worn.
Seals of the cylinder re-sequencing
valves.
Air in the circuit.
Levelling cylinder damaged.
Safety valves on the DFE module
damaged.
Check the valve, clean or replace if
necessary.
Check the valve, clean or replace if
necessary.
Check the valve, clean or replace if
necessary. Check the efficiency of the
internal slider.
Check and replace the hoses if damaged
or clogged.
Check the efficiency of the internal
sliders of the Walvoil main valve.
Check the cylinder’s internal seals,
rod and liner; repair any damaged
components or change the cylinder.
Remove and clean the valve and check
its seals; replace if necessary.
Check the valve calibration and replace
the valve if necessary.
Change the seals.
Check the re-sequencing valves, clean
or replace if worn out.
Bleed as indicated in the operator
manual.
Check the cylinder’s internal seals and
rod; repair any damaged components
or change the cylinder.
Check that the safety valves fitted to the
ports of the main valve are in efficient
working order. Remove and clean, or
re-calibrate or replace the valves if
necessary.
Summary of Contents for Telelift 3713 SX
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