Schmid & Wezel EFA Z 08 Operating Instructions Manual page 28

Malfunction
When the trigger lever is pressed,
the pump does not run and the
cutter does not close
When the trigger handles are
pressed, the pump does not run
and the cutter does not close
When the trigger lever is pressed,
the pump starts but the cutter
closes too slowly
Hydraulic pump too hot
Pumps runs, but no hydraulic
pressure in the cutter
Handle cannot be pressed
Cutter does not open when han-
dle is released
Pump does not run
Schmid & Wezel
D 75433 Maulbronn
Table 1: Troubleshooting
Possible cause
1. Power pack not switched on
2. Electric power supply not cor-
rect
3. Insufficient air pressure for
switching
4. Control line defective
5. Two-hand safety block defec-
tive
6. Plug connector of the
hydraulic return hose
not correctly tightened
7. Air connections for the two-
hand circuit reversed or not cor-
rectly attached
8. Gaskets defective
9. Oil level too low
10. Oil filter on the pump clogged
11. Hose coupling loose
12. Gear pump defective + B10
13. Gaskets in hydraulic cylinder
defective
14. Valve defective
15. Valve jammed due to soiling
16. See under point 10
17. Valve pin jammed,
does not return to starting posi-
tion or valve spring is broken
18. Setting of timer valve in
power pack not correct
19. See separate operating
manual for pump
Seite/ Page
28/ 39
31
Remedy
Switch on power pack
Check the electric power supply
and remedy the fault
Set the air pressure at the power
pack to at least 5 bar with 5 m
hose length
Inspect the control line and
replace, if necessary
Inspect the safety block and
replace, if necessary
Connect the hose correctly
Check the connections at the cut-
ter and power pack and correct, if
necessary
Inspect the gaskets and replace,
if necessary
Top up oil (see also Chapter 3.1.3
"Hydraulic power pack" (p. 24))
Change the oil and oil filter
Check the proper connection of
the hoses
Replace gear pump
Replace gaskets
Replace valve (see also Chapter
4.2 "Valve replacement" (p. 27)"
Clean valve (see also Chapter 4.2
"Valve replacement" (p. 27)"
See under point 10
Clean or replace valve
(see Chapter 4.2 "Valve replace-
ment" (p. 27)"
Correct setting
(see separate operating manuals
for power pack)
See separate operating manual
for pump
Ausführung/ Version
05.2007