Wen 4019

20
TROUBLESHOOTING
Problem Possible Cause Solution
The machine does
not start
1. The power cord or extension
cord is damaged or not properly
plugged in.
2. Defective power switch.
3. Carbon Brushes are worn.
4. Defective Motor.
1. Check the power cord, extension cord, power
plug and the power outlet. Do not use if any cord is
damaged.
2. Stop using the tool and contact customer service.
3. Have an experienced technician replace the car-
bon brushes. Replacement brushes (4019-131) can
be ordered from wenproducts.com.
4. Stop using the tool and contact customer service.
Poor cutting quality The saw chain is dull/worn
Replace the saw chain. Replacement chains (4019-
118) can be ordered from wenproducts.com.
The motor runs but
the chain is not cut-
ting
The machine is jammed
Turn off the machine immediately and discon-
nect the power supply. Wait for the chain to stop
completely and use a stick to remove the jammed
materials.
Dry saw chain
1. No oil in the oil tank
2. Oil tank flow channel is clogged
1. Refill oil (see page 11)
2. Unclog the oil flow channel.
The machine does
not saw properly,
vibrates or jumps up.
1. The chain tension is not adjusted
properly.
2. The chain is dull/worn out.
3. The bar and chain are installed
incorrectly.
4. The chain saw teeth is pulling in
the wrong direction
1. Check and adjust the chain tension (see page 10)
2. Replace the saw chain. Replacement chains
(4019-118) can be ordered from wenproducts.com.
3. Re-install the bar and chain properly (see page
14).
4. Remount the saw chain with the teeth in the cor-
rect direction.
The bar and chain
becomes too hot.
1. No oil in the tank.
2. Ventilation slots on the motor
housing are clogged.
3. Oil tank flow channel is clogged.
4. Dull saw chain
1. Fill the oil tank (see page 11). Frequently check
the oil level from the oil gauge window and make
sure to refill oil.
2. Unclog the ventilation slots.
3. Unclog the oil tank flow channel.
4. Replace the saw chain (see page 14).
WARNING: Stop using the tool immediately if any of the following problems occur or serious personal
injury may result. Repairs and replacements should only be performed by authorized service techni-
cians. If you have any questions, please contact our customer service at (800) 232-1195, M-F 8-5 CST.