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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.
Malfunction
When the trigger lever is pressed,
the pump does not run and the
guillotine does not close
When the switch lever is pressed
the pump starts,
but the guillotine does not close
When the trigger lever is pressed,
the pump starts but the guillotine
closes too slowly
Hydraulic pump too hot
Pumps runs, but no hydraulic
pressure in the guillotine
Handle cannot be pressed
Schmid & Wezel
D 75433 Maulbronn
Table 1: Troubleshooting
Possible cause
1. Power pack not switched on
2. Electric power supply not cor-
rect
3. Compressed air supply not
connected to guillotine / machine
4. Insufficient air pressure for
switching
5. Control line defective
6. Two-hand safety block defec-
tive
7. Plug connector of the
hydraulic return hose
not correctly tightened
8. Piston fracture (46)
9. Gaskets defective
10. Oil level too low
11. Oil filter on the pump clogged
12. Hose coupling loose
13. Gear pump defective
14. Oil filter on the pump clogged
15. Gear pump defective
16. Gaskets in hydraulic cylinder
defective
17. Valve defective
18. Valve jammed due to soiling
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Remedy
Switch on power pack
Check the electric power supply
and remedy the fault
Check and connect, if necessary
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
Remove and inspect the piston,
replace if necessary, see Chapter
4.3 "Piston changing" (p. 20)
Inspect the gaskets and replace,
if necessary
Top up oil (Chapter 3.1.3
"Hydraulic power pack" (p. 17))
Change the oil and oil filter
Check correct connection of the
hoses
Replace gear pump
Change the oil and oil filter
Replace gear pump
Replace gaskets
Replace valve (see also Chapter
4.2 "Valve replacement" (p. 20)"
Clean valve (see also Chapter 4.2
"Valve replacement" (p. 20)"
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04.2012
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