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Installing the Blades
1. Install the blade onto the spindle shaft (Fig. 49).
Important
The sail part of the blade must be pointing
upward, toward the inside of the mower to ensure proper
(Fig.
).
cutting
49
blade stiffener
2. Install the
Torque the blade bolt to 85–110 ft-lb (115–140 N m).
Correcting Cutting Unit
Mismatch
If one deck blade cuts lower than the other, correct as
follows.
Tire air pressure is critical in these procedures.
Note:
Make sure all tires have correct pressure.
1. Stop the engine, remove the key and disconnect the
spark plug wire(s) from the spark plug(s).
2. Adjust the tire pressure in all tires to specifications on
page 29.
3. Check that the blades and spindle shafts are not bent.
Refer to Checking for Bent Blades on page 38.
4. Set the height-of-cut to the 4 in. (102 mm) position.
Refer to Adjusting the Height-Of-Cut in the Operation
section.
5. Perform steps in the following sections Frame Set Up,
Checking Front–to–Rear Pitch and Checking
Side–to–Side Leveling.
Frame Set Up
Checking Carrier Frame and Deck
Alignment
1. Stop the engine, remove the key and disconnect the
spark plug wire(s) from the spark plug(s).
2. Place a long straight edge on top of the engine deck as
shown in figure 52.
3. At the carrier frame cross tube, measure location "A"
height (Fig. 52). This measurement must be 2–13/16
in. (71 mm), plus or minus a 1/4 in. (6 mm).
4. If the height at location "A" is not correct, adjustment
is needed.
5. Loosen the carrier frame mounting bolts on both sides
of the machine (Fig. 52).
6. Align the carrier frame and engine deck to match
2–13/16 in. (71 mm), plus or minus a 1/4 in. (6 mm) at
location "A" (Fig. 52).
and blade bolt (Fig. 49).
7. Tighten the carrier frame mounting bolts on both sides
of the machine.
4
6
Figure 52
1. Carrier Frame
2. Top of engine deck
3. Carrier frame mounting
bolts
Checking Engine Deck Height
1. Stop the engine, remove the key and disconnect the
spark plug wire(s) from the spark plug(s).
2. Adjust the tire pressure in all tires to specifications on
page 29.
3. Measure engine deck height at location "A" (Fig. 53).
4. Measure engine deck height at location "B" (Fig. 53).
5. If the height at location "A" and "B" are not the same,
change tire pressure slightly to make them the same.
2
3
4
Figure 53
1. Back view of machine
2. Top of engine deck
3. Tires
40
1
5
2
3
m–5315
4. Location A, 2–13/16 in.
(71 mm) 1/4 in. (6 mm)
5. Straight edge
6. Carrier frame cross tube
3
1
4 4
m–5237
4. Same height at locations
A and B
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