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Troubleshooting Chart
Stop using tool immediately if any of the following problems occur. Serious personal injury could occur.
Any repairs or replacements must be done by a Qualified Service Person or Authorized Service Center.
Symptom
Air leaking at trigger valve
area
Air leaking between housing
and nose
Air leaking between housing
and cap
Tool skips driving fastener
Tool runs slow or has loss of
power
Fasteners are jammed in tool 1. Guide on driver is worn
Possible Cause(s)
O-rings in trigger valve housing are
damaged
1. Loose screws in housing
2. Damaged o-rings
3. Damage to bumper
1. Loose screws
2. Damaged gasket
1. Worn bumper
2. Dirt in nose piece
3. Dirt or damage prevent fasteners or
pusher from moving freely in magazine
4. Damaged pusher spring
5. Inadequate air flow to tool
6. Worn o-ring on piston or lack of
lubrication
7. Damaged o-ring on trigger valve
8. Air leaks
9. Cap gasket leaking
1. Tool not lubricated sufficiently
2. Broken spring in cylinder cap
3. Exhaust port in cap is blocked
2. Fasteners are not correct size
3. Fasteners are bent
4. Magazine or nose screws are loose
5. Driver is damaged
CHG00189 (Model CHN10401)
Corrective action
Replace o-rings. Check operation of Work
Contact Element (WCE)
1. Tighten screws
2. Replace o-rings
3. Replace bumper
1. Tighten screws
2. Replace gasket
1. Replace bumper
2. Clean drive channel
3. Clean magazine
4. Replace spring
5. Check fitting, hose, or compressor
6. Replace and lubricate o-rings
7. Replace o-rings
8. Tighten screws and fittings
9. Replace gasket
1. Lubricate tool
2. Replace spring
3. Replace damaged internal parts
1. Replace guide
2. Use only recommended fasteners
3. Replace with undamaged fasteners
4. Tighten screws
5. Replace driver
9
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