John Deere

OMTCU15013

Issue L1

Mid-Mount Z-TrakŪ

737 and 757

PIN (010001- )

Introduction

Product Identification

Safety

Operating

Replacement Parts

Service Intervals

Service Lubrication

Service Engine

Service Transmission

Service Steering & Brakes

Adjusting Front Caster Spindle Bearing

Checking and Aligning Motion Control Levers

Adjusting Park Brake

Service Mower

Service Electrical

Service Miscellaneous

Troubleshooting

Storage

Assembly

Specifications

Warranty

John Deere Quality Statement

Service Record

All Manuals Close Window

Service Steering & Brakes


Adjusting Front Caster Spindle Bearing

NOTE: Adjustment required only if front caster wheel shimmies during travel.

1. Park machine safely. (Refer to Parking Safely in the Safety section.)


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2. Remove dust cover (A) from top of spindle.

3. Remove cotter pin.

4. Turn castlenut 1/4 turn clockwise.

5. Replace cotter pin. Do not loosen the castlenut to align cotter pin hole, increase the tightening to align.

6. Replace dust cover.

7. Test machine to determine if wheel shimmy is still present. Repeat adjustment as necessary.

Checking and Aligning Motion Control Levers

Check Alignment:

1. Park machine safely. (Refer to Parking Safely in the Safety section.)


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2. Move both motion control levers (A) forward.

3. Check levers for equal alignment.

· Check gap (B) between the levers. The recommended gap is 3-6 mm (1/8-1/4 in.).

NOTE: If the ends of the levers strike against each other while in the neutral position, move the levers to the neutral lock position and carefully bend them outward. Move them back to the neutral position and check for the recommended gap of 3-6 mm (1/8-1/4 in.).

· If positions of the control levers are unequal, an adjustment is necessary.

Alignment Procedure

1. Adjust position of motion control levers:


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· Loosen cap screws (C).

· Slide both levers forward or rearward to desired position within tab slots until levers are aligned.

· Tighten cap screws.

Adjusting Park Brake

IMPORTANT: Avoid damage! Due to initial brake wear, the park brake should be checked and adjusted after the first 25 hours of use.

A park brake that is adjusted too tightly could damage the transmission or cause premature brake wear.


1. Park machine safely. (Refer to Parking Safely in the Safety section.)

2. Lift rear of machine with a safe lifting device.

3. Verify that the park brake is locked.


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4. Locate the park brake adjustment assembly (A and B) on each side of the machine.


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5. Measure the distance (E) from the swivel block (G) and the head of the brake rod (F).

· Distance (E) should be 3-3.5 mm.

6. If necessary, adjust distance (E).

· Loosen jam nut (K) directly below yoke.

· To obtain distance (E), rotate the rod counter-clockwise using a wrench on jam nuts (J) until the head of the rod protrudes 3-3.5 mm.

· Tighten jam nut (K) against yoke.

7. Measure the length (D) of linkage spring (H).

· The length of compressed spring between the washer (I) and the swivel block (G) should be 82 mm (3 1/4 in.).

8. If necessary, adjust length of linkage spring (H).

· Loosen two hex jam nuts (J).

· Adjust position of two hex jam nuts (J) until the proper distance (D) is obtained.

· Tighten two hex jam nuts (J).

9. Check park brake linkage on other side of machine for proper adjustment.

10. Lock and unlock the park brake four times, then check the dimensions of the brake rods and linkage springs. Repeat steps 4 - 8 as necessary.

11. Test park brake.