35
Adjusting the Blade Drive Belt
Adjust the blade drive belt after the first 20 operating hours
and every 50 operating hours thereafter.
1.
Remove the mower; refer to Removing the Mower on
page 34.
Note:
You must remove the mower to adjust the blade
drive belt properly.
2.
Remove the V-belt pulley and the idler arm assembly
(Fig. 36).
3.
Remove the belt cover.
4.
Loosen the 2 hex nuts on the idler pulley (Fig. 37).
3
2
1
4
5
Figure 37
Top View
1. Hex nuts
2. Mower belt
3. M10 nut
4. 30 N of force
5. 5 mm
5.
Adjust the M10 nut until the belt flexes 5 mm with 30 N
of force (Fig. 37).
6.
Rotate the belt 3 revolutions.
7.
Check the belt tension and adjust it if necessary.
8.
Tighten the 2 hex nuts on the idler pulley.
9.
Install the mower; refer to Installing the Mower on
page 34.
Adjusting the Height
Adjustment Cable Rod
Assembly
Check the front-to-rear blade slope every 100 hours, yearly,
or any time you install the mower. Before you check the
slope, inflate the front and rear tires to the recommended
air pressure; refer to Checking the Tire Pressure on
page 24. If the front of the mower is not within 4 to 11 mm
(1/8 to 3/8 in.) lower than the rear of the mower, adjust the
blade slope.
1.
Park the tractor on a level surface.
2.
Disengage the blades (PTO).
3.
Set the parking brake.
4.
Stop the engine and wait for all moving parts to stop.
5.
Remove the ignition key.
6.
Disconnect the wire from the spark plug.
7.
Move the lower pin of the front adjustment suspension
into the bottom position of the slotted holes by
adjusting the 2 nuts (M12) on the front suspension
(Fig. 36).
8.
Move the height-of-cut lever to position 1.
Note:
The front mower gauge wheels must rest on the
ground.
9.
Adjust the M8 locknut at the end of the height
adjustment rod assembly until the rod is slightly taut
(Fig. 38).
m-4935
1
2
Figure 38
1. M8 locknut
2. Height adjustment rod
