Troubleshooting; Shut Down - Deprag MINIMAT 346-237U Operating Instruction Booklet

10 Troubleshooting

Possible faults and their causes are shown below:
Fault Cause
Screwdriver No air, shut-off valve is closed Open shut-off valve
does not start
Valve pin is too short or miss-
ing
Clutch is not engaged
Insufficient Air pressure too low
power
Restriction in air hose
Hose diameter is too small
Valve pin is too short
Vanes are worn
Silencer or screen support
clogged
Screwdriver Air pressure is too low for re-
does not shut- quired torque value
off or ratchets Valve pin is too long
If necessary, please send the tool to DEPRAG for service.

11 Shut Down

For shut-down perform the following steps:
No. Action
1. Turn the air supply to "OFF".
2. Disconnect the pneumatic screwdriver from the air supply.
3. Drip a couple of oil-drops into the inlet port, reconnect screwdriver to the air supply
and let it run for a short time (under low pressure).
4. Again disconnect the pneumatic screwdriver from the air supply.
5. Close all connections.
The pneumatic screwdriver may now be stored until needed again.
Solution
Check required length of valve pin
( chapter Check Length of Valve Pin )
and replace valve pin if necessary
Mount clutch correctly (
and Exchange of Clutch Spring )
Air pressure should be 90 PSI for maxi-
mum performance
Remove bends or other restrictions
Use required hose diameter
Check required length of valve pin
( chapter Check Length of Valve Pin )
and replace valve pin if necessary
Exchange vanes
Exchange silencer or screen support
Maintain air pressure of 90 PSI
Check required length of valve pin
( chapter Check Length of Valve Pin )
and replace and/or shorten valve pin if
necessary
33
chapter Range