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