Adjustment Of Spring-Loaded Pulley; Maintenance - EFA Z079 Betriebsanleitung

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
E =
Electric unit
Malfunction/
P =
fault
Pneumatic
unit
The valve levers
(27) are
P
operated, but
the pump is not
working.
E + P
Hydraulic pump
E
is overheating.
Pump is
running, but
E there is no
pressure at the
cutter.
Schmid & Wezel
D75433 Maulbronn,
Table 1: Troubleshooting
Possible cause
1. Compressed air supply
blocked or defective
2. Pressure reducer
incorrectly set
3. Water trap or oiler
defective
4. Suction unit of pump dirty
5. Air filter at compressor
dirty
6. Reversing valve at the air
pump is blocked, due to air
contamination or excessive
air humidity
7. Piston seals are defective
8. Gear pump or pressure
tube is defective
9. Seals or check valves at the
hydraulic pump cylinders
are defective.
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".
Remedy
Check compressed air system.
Adjust pressure (6 bar) at the
pressure reducer.
Inspect oiler/water trap, empty
and clean water trap, if
necessary.
Replace suction unit, tank or oil.
Clean or replace air filter, inspect
compressed air lines for
contamination or moisture (we
recommend using dried air).
Contaminated or damp air can
lead to serious malfunction. Try
repairing the control piston or
replace the reversing valve.
Replace seals.
Replace gear pump or pressure
tube
Replace seals; if a check valve is
defective, replace pump cylinder
(check valves cannot be
dismantled).