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GB - 34
TRACK TENSION ADJUSTMENT
(921007, 008, 009)
Check the track tension by applying pressure
on the track midway between the upper and
rear track rollers. Deflection should be
approximately 3/8 in. (9.6 mm). See
Figure 47.
If deflection is excessive, tighten the track
tension.
If unit pulls to the left or right when a straight
path is desired adjust the track tension. If the
unit is pulling to the left, tighten the left track
adjuster. If the unit is pulling to the right,
tighten the right track adjuster.
To adjust (Figure 48):
1. Tighten the adjuster nut to tighten the
track tension.
Loosen the adjuster nut to reduce track
tension.
2. Check that unit tracks straight with no
pulling to either side.
HEIGHT ADJUSTER CABLE
ADJUSTMENT (921007, 008, 009)
1. Make sure that height adjustment lock
finger is fully engaged. See Figure 85.
2. Loosen jam nut on cable adjustment
barrel
3. Turn the adjustment barrel to remove all
cable slack and bring the overtravel arm
until it makes slight contact with the right
end of the slot in the height adjuster lock
finger.
4. Tighten the jam nuts.
Figure 46
OS7142
1. Hex Shaft
2. Bearing
Flange
3. Speed
Selector
Arm
4. Friction Disc
5. Spring Clip
6. Drive Plate
Assembly
7. Drive
Sprocket
2
4
1
5
3
6
7
Figure 47
3/8 in.
(9.6 mm)
OS7226
Figure 48
Track
Adjusters
OS7228
1. Height Adjuster Lock Finger
2. Overtravel Arm
3. Height Adjuster Cable
4. Jam Nuts
Figure 85
3
2
1
OS7230
Before adjusting ensure
that height adjuster lock
finger is fully engaged.
Pin on overtravel arm
makes slight contact
with end of slot.
4