the inside housing or in Fig. 10.
5. Place the guide bar and chain onto the bar mount (Fig. 10). In the process, guide the chain around the pinion
and hang the guide bar on the chain tensioning bolt.
6. Fully close the chain cover. Make sure it clicks in place tightly. Insert the chain cover lock knob knob, but do
not tighten it all the way.
7. Adjust the chain tension by rotating the tension adjustment wheel (outer wheel). Clockwise rotation increases
the chain tension; counterclockwise rotation reduces the chain tension. The saw chain is correctly tensioned if the
chain can be raised approximately 2 mm from the center of the guide bar. Fully tighten the chain cover lock knob.
NOTE: The saw chain must be tensioned properly to ensure safe operation. Since the saw chain heats up during
operation, its length can therefore fluctuate. Check the chain tension every 10 minutes of operation and adjust as
necessary, particularly for new saw chains.
MAINTENANCE
WARNING: Disconnect the power tool from the power supply before carrying out any adjustments,
service or maintenance.
CLEANING
1. Unplug the power supply before cleaning. Clean the exterior of the tool with a damp cloth and a mild cleanser.
Never immerse the machine in water or other liquids. Do not at any time let brake fluids, gasoline, petroleum-based
products, penetrating oils, etc., come in contact with plastic parts. Chemicals can damage, weaken or destroy plastic
which may result in serious personal injury.
2. Ensure that the ventilation slots are not blocked to prevent overheating.
3. Regularly clean the chain tensioning mechanisms by blowing compressed air onto it or by cleaning it with a brush.
4. Keep the handles free from oil and grease to ensure a secure hold.
14
REPLACING THE GUIDE BAR AND SAW CHAIN (Fig. 9 & 10)
The guide bar must be replaced if the groove of the guide is worn out or the
spur wheel in the guide bar is damaged or worn out. The saw chain must be
replaced when it becomes dull. Replacement guide bars (Model 4019-117)
and saw chains (Model 4019-118) can be ordered from wenproducts.com.
1. Disconnect the tool from the power source.
2. Fully loosen the chain tensioning wheel (outer wheel) by turning it
counterclockwise (Fig. 9 - 1). Make sure to turn it all the way, this will al-
low the chain cover to be properly placed back later.
3. Fully loosen the cover lock knob (inner knob) by turning it counter-
clockwise (Fig. 9 - 2) and remove the cover lock knob and chain cover.
4. Remove the bar and chain. Replace the worn bar and chain as neces-
sary. Place the saw chain into the groove of the outside edge of the guide
bar. NOTE: The chain’s direction must match the indication shown on
1
1
2
Fig. 9
Fig. 10
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