Jonsered SM 2055 E Operator's Manual page 31

Drive belt
Chain sawmill with electric motor
(FIG. 54)
The drive belt becomes worn as the sawmill is used.
The belt should be replaced after 200 hours of
operation to avoid a belt failure during operations. If
the drive slips or the belt needs to be adjusted
frequently, this is a sign that the belt needs to be
replaced. Replace the belt as follows:
1. Disconnect the connector from the distribution
box.
2. Disconnect the belt guard (A).
3. Completely remove the belt adjuster (B).
4. Disconnect the electric motor by loosening the
screws.
5. Carefully lift up the motor and replace the belt.
6. Ensure that the belt is correctly positioned in the
tracks (C) on both pulleys.
7. Screw the motor into position and tension the belt
with the tension screw (B). Check the belt tension
with your thumb (D) and install the belt guard (A).
The saw unit's height
adjustment
Maintenance procedures on the components listed
below are necessary in order to assure the saw
chain's vertical adjustment.
Runners
The guides that locate the saw saddle should be
wiped clean and moistened with oil as required.
Height adjustment screw
The screw must be wiped clean and lubricated if
necessary.
Adjusting the saw saddle
The saw saddle's plastic guides may need to be
adjusted after a few hours of use. This is done as
follows:
1. Slacken off the three mounting nuts.
2. Screw in the two adjustment screws until there is
no play, then tighten the nuts.
3. Check the position of the bar in relation to the log
bolsters and adjust if required, see page 20.
MAINTENANCE
FIG. 54
FIG. 55
FIG. 56
B
C
D
10 mm
A
E
31
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