EFA EFA Z27, Operating Instructions, Maintenance Instructions, Spare Part List

Page: 7 / 14

Schmid & Wezel
D-75433 Maulbronn Seite / Page
5/ 12
Ausführung / Execution
05.2004
If the cutter cannot be pulled out, the spring balanc-
er is jammed and a readjustment is necessary:
„
Turn the screw in PLUS direction until the cutter
can be pulled out and start the fine adjustment
again (see above).
5. Maintenance
Malfunctions may occur during operation, but these
are generally relatively simple to remedy. Table 1:
"Troubleshooting" lists these malfunctions with pos-
sible causes and resulting potential remedies.
Table 1: Troubleshooting
Malfunction Possible cause Remedy
When the trigger lever is pressed,
the pump does not run and the
cutter does not close
1. Unit is not switched on. Switch on power pack
2. Power supply is incorrect.
Check the electric power supply
and remedy the fault
On actuating the trigger lever, the
pump starts up but the cutter
does not close.
3. Insufficient air pressure for
switching
Set the air pressure on the power
generator to at least 5 bar with 5
m hose length
4. Control line is defective
Inspect the control line and
replace, if necessary
5. Two-hand safety block is
defective
Inspect the safety block and
replace, if necessary
6. Coupling connector of the
hydraulic return flow hose is not
connected properly
Connect the hose correctly
7. Gaskets defective
Inspect the gaskets and replace,
if necessary
8. Oil level too low
Refill oil (see Chapter 3.1.2
"Hydraulic power unit" (pg. 3)
When actuating the trigger lever,
the pump starts but the cutter
closes slowly
9. Oil filter on the pump clogged Change the oil filter and oil
10. Hose coupling is loose
Check the proper connection of
the hoses
Hydraulic pump too hot 11. Gear pump is defective Replace gear pump
Pumps runs, but no hydraulic
pressure in the cutter
12. Defective seals in the hydrau-
lic pump cylinder
Replace the seals, replace the
pump cylinder
Handle cannot be pressed
13. Defective valve
Replace valve (see Chapter 4.2
"Valve Replacement" (pg. 4))
14. Valve blocked due to soiling
Clean valve (see Chapter 4.2
"Valve Replacement" (pg. 4))
Cutter does not open when han-
dle is released
15. Refer to Point 10 Refer to Point 10
16. Valve pins block, do not
return to initial position or valve
spring is broken
Clean or replace the valve or (see
Chapter 4.2 "Valve Replacement"
(pg. 4))
17. Setting of timer valve in unit
not correct
Adjust the setting (see separate
operating manual or unit)
Pump does not run
18. See separate operating man-
ual for pump
See separate operating manual
for pump