Deprag 400373 B, Operating Instruction Booklet

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10 Troubleshooting
Possible faults and their causes are shown below:
Fault Cause Solution
No air, shut-off valve is closed Open shut-off valve
Valve pin is too short or miss-
ing
Check required length of valve pin
(
chapter Check Length of Valve Pin)
and replace valve pin if necessary
Screwdriver
does not start
Clutch is not engaged
Mount clutch correctly ( chapter Range
and Exchange of Clutch Spring )
Air pressure too low Air pressure should be 90 PSI for maxi-
mum performance
Restriction in air hose Remove bends or other restrictions
Hose diameter is too small Use required hose diameter
Valve pin is too short Check required length of valve pin
(
chapter Check Length of Valve Pin)
and replace valve pin if necessary
Vanes are worn Exchange vanes
Insufficient
power
Silencer or screen support
clogged Exchange silencer or screen support
Air pressure is too low for re-
quired torque value Maintain air pressure of 90 PSI Screwdriver
does not shut-
off or ratchets Valve pin is too long
Check required length of valve pin
(
chapter Check Length of Valve Pin)
and replace and/or shorten valve pin if
necessary
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.