Schmid & Wezel
D75433 Maulbronn,
Page/ Seite
7/ 19
Version/ Ausführung
04.2009
4.5 Adjustment of spring-loaded
pulley
The spring-loaded pulley can be adjusted by
turning the PLUS/MINUS screw at the housing
(see fig. 4).
Figure 4:Spring-loaded pulley
Turn the screw in MINUS direction until the
tool is balanced and suspended at the correct
height.
If it is not possible to pull more cable from the
pulley, it is jammed and must be readjusted.
Turn the screw in PLUS direction until cable
can be pulled from the pulley and repeat the
fine adjustment (see above).
5. Maintenance
Malfunctions that might occur during operation
can generally be eliminated by simple means. The
most common malfunctions, their causes and
remedies are compiled in Table 1:
"Troubleshooting".
Table 1: Troubleshooting
E =
Electric unit
P =
Pneumatic
unit
Malfunction/
fault
Possible cause
Remedy
P
The valve levers
(27) are
operated, but
the pump is not
working.
1. Compressed air supply
blocked or defective
Check compressed air system.
2. Pressure reducer
incorrectly set
Adjust pressure (6 bar) at the
pressure reducer.
3. Water trap or oiler
defective
Inspect oiler/water trap, empty
and clean water trap, if
necessary.
4. Suction unit of pump dirty
Replace suction unit, tank or oil.
5. Air filter at compressor
dirty
Clean or replace air filter, inspect
compressed air lines for
contamination or moisture (we
recommend using dried air).
6. Reversing valve at the air
pump is blocked, due to air
contamination or excessive
air humidity
Contaminated or damp air can
lead to serious malfunction. Try
repairing the control piston or
replace the reversing valve.
E + P
7. Piston seals are defective
Replace seals.
E
Hydraulic pump
is overheating.
8. Gear pump or pressure
tube is defective
Replace gear pump or pressure
tube
E
Pump is
running, but
there is no
pressure at the
cutter.
9. Seals or check valves at the
hydraulic pump cylinders
are defective.
Replace seals; if a check valve is
defective, replace pump cylinder
(check valves cannot be
dismantled).
