10
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 dam-
aged.
2. Trigger valve head are 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 between body and drive
guide
Damaged piston O-ring or bumper Check and replace O-ring or bum-
per.
Air leaking between body and cylin-
der 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.
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 fit-
tings.
4. Replace O-ring or lubricate.
5. Replace O-ring.
6. Replace seal.
Fasteners repeatedly jam 1. Joint guide is worn.
2. Fasteners are wrong size or dam-
aged.
3. Magazine or front plate screws
are loose.
4. Blade in piston assembly is dam-
aged.
1. Replace joint guide.
2. Use the recommended and un-
damaged 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.