Adjusting the Axle Position

Maintenance

Cutting Height Adjustment Table (1 inch to 4 1/4 inches (2.5 cm-10.8 cm)) (cont'd.)

Cutting

Axle

Number Of Spacers

 

 

Number of 1/4 inch (.64 cm) Blade Spacers Below Spindle

Height

Position

Below Caster

 

 

 

 

 

 

 

 

 

 

 

 

 

Range

(Figure 10)

Support Hub

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/2

3/16

 

4

 

3

 

2

 

1

 

0

 

 

 

inch

inch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1.2 cm)

(.48 cm)

 

 

 

 

 

 

 

 

 

 

 

 

 

2

1/8–

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 1/8 inches

 

 

 

2

1/8 inch

2

3/8 inch

2

5/8 inch

2

7/8 inch

3

1/8 inch

(5.4–7.9 cm)

C

2

0

 

(5.4

cm)

 

(6.0

cm)

 

(6.7

cm)

 

(7.3 cm)

 

(7.9 cm)

2

1/4–

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 1/4 inches

 

 

 

2

1/4 inch

2

1/2 inch

2

3/4 inch

 

3 inch

3

1/4 inch

(5.7–8.3 cm)

C

2

1

 

(5.7

cm)

 

(6.4

cm)

 

(7.0

cm)

 

(7.6 cm)

 

(8.3 cm)

2

1/2–

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 1/2 inches

 

 

 

2

1/2 inch

2

3/4 inch

 

3 inch

3

1/4 inch

3

1/2 inch

(6.4–8.9 cm)

C

3

0

 

(6.4

cm)

 

(7.0

cm)

 

(7.6

cm)

 

(8.3 cm)

 

(8.9 cm)

2

3/8–

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 3/8 inches

 

 

 

2

3/8 inch

2

5/8 inch

2

7/8 inch

3

1/8 inch

3

3/8 inch

(6.0–8.6 cm)

D

2

1

 

(6.0

cm)

 

(6.7

cm)

 

(7.3

cm)

 

(7.9 cm)

 

(8.6 cm)

2

1/2–

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 1/2 inches

 

 

 

2

1/2 inch

2

3/4 inch

 

3 inch

3

1/4 inch

3

1/2 inch

(6.4–8.9 cm)

D

3

0

 

(6.4

cm)

 

(7.0

cm)

 

(7.6

cm)

 

(8.3 cm)

 

(8.9 cm)

2

3/4–

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 3/4 inches

 

 

 

2

3/4 inch

 

3 inch

3

1/4 inch

3

1/2 inch

3

3/4 inch

(7.0–9.5 cm)

D

3

1

 

(7.0

cm)

 

(7.6

cm)

 

(8.3

cm)

 

(8.9 cm)

 

(9.5 cm)

3–4 inches

 

 

 

 

3 inch

3

1/4 inch

3

1/2 inch

3

3/4 inch

 

4 inch

(7.6–10.1 cm)

D

4

0

 

(7.6

cm)

 

(8.3

cm)

 

(8.9

cm)

 

(9.5 cm)

(10.1 cm)

2

7/8–

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 7/8 inches

 

 

 

2

7/8 inch

3

1/8 inch

3

3/8 inch

3

5/8 inch

3

7/8 inch

(7.3–9.8 cm)

E

3

1

 

(7.3

cm)

 

(7.9

cm)

 

(8.6

cm)

 

(9.2 cm)

 

(9.8 cm)

3

1/8–

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 1/8 inches

 

 

 

3

1/8 inch

3

3/8 inch

3

5/8 inch

3

7/8 inch

4

1/8 inch

(7.9–10.5 cm)

E

4

0

 

(7.9

cm)

 

(8.6

cm)

 

(9.2

cm)

 

(9.8 cm)

(10.5 cm)

3

1/4–

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 1/4 inches

 

 

 

3

1/4 inch

3

1/2 inch

3

3/4 inch

 

4 inch

4

1/4 inch

(8.3–10.8 cm)

E

4

1

 

(8.3

cm)

 

(8.9

cm)

 

(9.5

cm)

(10.1 cm)

(10.8 cm)

Important: Always adjust the Number of Spacers below Caster Hub to correspond to the Axle Position as shown in table to obtain proper “rake” (blades should always be level to the ground or tipped slightly down at the front).

Adjusting the Axle Position

Desired cutting height range can be obtained by adjusting the rear axle and placing caster spacers above or below the caster arm (See Figure 10 and Figure 11 along with the Cutting Height Adjustment Chart). It may be necessary to readjust wheel drive and brake linkages.

To adjust rear axle:

1.Stop the machine and move the drive levers to the neutral lock position.

2.Disengage the PTO.

3.Place the drive levers in the neutral lock position.

4.Remove mower deck belt shield for access to axle adjustment bolts.

5.Loosen but do not remove the two axle pivot bolts and the two axle adjustment bolts (see Figure 10).

6.Place a jack under the rear center of the engine deck.

7.Raise the back end of the engine deck up enough to remove the two axle adjustment bolts.

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Exmark 4500-689 manual Adjusting the Axle Position, Maintenance