Instructions / Assembly
12
Troubleshooting
Caution: Stop using the tool immediately if any of the following problems occur. Serious
personal injury could occur. Any repairs or replacements must be done by a qualified person or an
authorized WEN® service center only.
Problem
Cause
Solution
Air leaking at
Trigger area
1. O-ring in trigger valve is damaged.
2. Trigger valve head are damaged.
3. Trigger valve stem, seal or O-ring
are 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 (52)
Damaged piston O-ring or bumper
Check and replace O-ring or bumper.
Air leaking
between body and
cylinder cap
1. Screw loose.
2. Damaged seal.
1. Tighten screws.
2. Check and replace seal.
Blade driving
fastener too
deeply
1. Worn bumper.
2. Air pressure is too higher.
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 skip a
fasteners
1. Worn bumper or damaged spring.
2. Dirt in drive guide (49).
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 are jammed
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.