Use and Care Manual

12
TROUBLESHOOTING
CAUTION: Stop using the tool immediately if any of the following problems occur or risk serious
personal injury. Repairs and replacements should only be performed by authorized personnel at a
certified WEN service center.
Problem Common Causes Solution
Air leaking at
Trigger area
1. O-ring in trigger valve is damaged.
2. Trigger valve head is damaged.
3. Trigger valve stem, seal or O-ring is damaged.
1. Check and replace O-ring.
2. Check and replace trigger valve head.
3. Check and replace trigger valve stem, seal
or O-ring.
Air leaking be-
tween body and
drive guide
Damaged piston O-ring or bumper Check and replace O-ring or bumper.
Air leaking be-
tween body and
cylinder cap
1. Loose Screw.
2. Damaged Seal.
1. Tighten screws.
2. Check and replace seal.
Fasteners are
driven too deep
1. Worn bumper.
2. Air pressure is too high.
1. Replace bumper.
2. Adjust the air pressure.
3. Adjust the depth wheel.
Runs slowly or
has power loss
1. Insufficient oil.
2. Insufficient air supply.
3. Broken spring in cylinder cap.
4. Exhaust port in cylinder cap is blocked.
1. Lubricate as instructed.
2. Check air supply.
3. Replace spring.
4. Replace damaged internal parts.
Tool skips a
fastener
1. Worn bumper or damaged spring.
2. Dirt in drive guide.
3. Inadequate airflow to tool.
4. Worn or dry O-ring on piston.
5. Damaged O-ring on trigger valve.
6. Cylinder cap seal leaking.
1. Replace bumper or pusher spring.
2. Clean drive channel of front plate.
3. Check hose and compressor fittings.
4. Replace O-ring or lubricate.
5. Replace O-ring.
6. Replace seal.
Fasteners re-
peatedly jam
1. Joint guide is worn.
2. Fasteners are wrong size or damaged.
3. Magazine or front plate screws are loose.
4. Blade in piston assembly is damaged.
1. Replace joint guide.
2. Use the recommended and undamaged
fasteners.
3. Tighten screws.
4. Replace piston assembly.
Tool will not
drive down
tight
1. Worn blade in piston assembly.
2. Lack of power.
3. Slow cycling and loss of power.
1. Replace piston assembly.
2. Adjust to adequate air pressure.
3. Check cylinder cap spring for broken
coils or reduced length. Check if exhaust
port of cylinder cap is restricted.