GB - 18
Adjusting the Parking Brake
1. The Parking Brake may be adjusted through the use
of the jam nuts on the brake rod which push against
the compression spring which pushes on the caliper
arm.
2. Turn the nuts further on the rod (clockwise) to tighten
the brake and further off the rod (counter clockwise)
to loosen the brake.
3. Ensure when the brake is applied, the caliper arm
does not contact the return nuts on the rod in front of
the caliper arm. If they do, back them off slightly.
4. When installing new pads in the calipers, they must
be burnished by driving for a short distance (about
200 feet) with the brake on. To do this, bring the
parking brake lever part-way up while driving
normally (in a straight line). This quickly breaks-in the
pads for maximum effectiveness.
Adjusting the unit to Track Straight
Check and adjust tire pressure. Increase pressure on
side unit tracks to. DO NOT exceed maximum
recommended tire pressure (refer to
Specifications
).
If tire pressure adjustment does not solve tracking
problem, the limiter bolts at base of handles can be
adjusted. Front bolts are for forward and rear bolts are for
reverse. Lengthen bolts (move closer to lever) on side
which is too fast.
Adjusting Anti-Scalp Rollers
The anti-scalp rollers are set at the factory for typical
mowing height, but can be adjusted for high or low cutting
conditions.
Rollers are intended to prevent lawn scalping, not to
control cutting height.
For a very high cutting height, set the rollers in their
lowest position on the bracket.
For a very low cutting height, set the rollers in their
highest position on the bracket.
All rollers should be set at the same height.
Leveling the Mower Deck
These adjustments should be made on a level surface
with the tires inflated to the correct air pressure.
The mower is leveled from side to side with the slots
where 4 chains fasten to the mower mounting brackets.
The mower is leveled from front to rear by adjusting the
rod running down each side of the frame (Figure 15).
1. Raise mower deck and insert 3" (7.6 cm) tall blocks
to support deck.
2. Lower deck onto blocks so chains are slack.
3. Measure from bottom of mower blade end to ground.
4. Set hydraulic lift cylinder so cut of height reads the
same as blade height measurement.
5. Loosen the locknuts on the side where the chains are
slack and slide the bolt down the slot until the chain is
tight.
6. Tighten bolt and nuts in mower mounting brackets.
7. Lift mower and remove blocks.
8. Measure height of deck at each side. Measurements
must be within 1/16" (1.5 mm) of each other.
9. If measurements are out of range, fix by adjusting
chains on low side of deck.
10. Once deck is level side to side, measure height of
deck at middle of front and on both sides of rear.
Front of deck should be 1/8" (3 mm) lower than rear.
11. To adjust, loosen rear hex nut of the front mower lift
pivot on each rod.
12. Turn the front hex nut on each rod until mower is 1/8"
(3 mm) lower in front.
NOTE:
If mower cannot be leveled it may be necessary
to loosen the rear nut of the rear mower lift pivot to get
more threads at the front of rod for adjustment. After loos-
ening rear nut and adjusting level, tighten front nut on
rear mower lift pivot.
13. Tighten rear hex nut on each rod that was loosened
in step 11.
Highest
Mowing
Position
Lowest
Mowing
Position
OF3161
Figure 14
1. Rod
2. Rear Hex Nut
3. Front Hex Nut
4. Chains
5. Bolts and Nuts
6. Mower Mounting
Brackets
7. Front Mower Lift Pivot
8. Rear Mower Lift Pivot
9. Hydraulic Cylinder
OF1920
2
7
3
1
5
8
Right Side View
Front of Unit
6
6
5
4
4
9
Figure 15
