Checking and Adjusting Park Brake

Check Procedure—Brake Engaged

1. 
   TCT005196-UN-28SEP12

   Stop the machine on a maximum of 17° slope.

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2. Lock park brake.

Results

If adjusted properly, the brakes must prevent the wheels from turning. If wheels turn, perform adjustment procedure.

Check Procedure—Brake Released

1. Park machine safely. (See “Park Machine Safely” in the Safety section.)

2. Start engine.

3. Unlock park brake.

4. Move both control levers forward.

Results

• If the brakes are adjusted properly, the drive wheels turn freely and the machine begins to travel forward. Adjust the brakes if needed.
• If the brakes are over-tightened, an audible hydrostatic whine occurs and the machine moves slowly. Adjust the brakes if needed.

Park Brake Adjustment

TCT005197-UN-24SEP12

1. Right and left brakes must be adjusted evenly to ensure maximum brake performance and prevent uneven brake wear.

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

   Perform adjustment if neutral interlock system adequately restrains controls in neutral, but brake does not hold on slope.

   Park machine safely. (See “Park Machine Safely” in the Safety section.)

2. Lock park brake.

3. Avoid Injury! The machine can fall or slip from an unsafe lifting device or supports.

   • Use a safe lifting device rated for the load to be lifted.

   • Lower machine onto jack-stands or other stable supports and block wheels before servicing.

   Do not use rear grille as a lift point; using the grille could damage the frame.

   Lift rear of machine using a safe lifting device.

4. Measure the gap (A) between the two washers (B).

5. Tighten or loosen the brake equalizer adjustment nut (C) on park brake actuator rod (D) so that the gap (A) between the two washers meets specification:

   Park Brake Washer Gap	Length	27—29 mm (1-1/16—1-9/64 in.)

6. Test park brake.

Neutral Interlock Adjustment—Brake Pedal

TCT005198-UN-24SEP12

1. Perform adjustment only if neutral interlock system does not adequately lock control sticks in neutral, or if brake or steering system has been disassembled.

   Park machine safely. (See “Park Machine Safely” in the Safety section.)

2. Unlock park brake.

3. Back off brake equalizer adjustment nut (A) to end of threaded rod, but do not remove.

4. Lock park brake.

5. Move control levers to the neutral lock position.

6. 
   TCT005199-UN-05SEP12

   
   TCT005200-UN-05SEP12

   Control lever removed for clarity.

   
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   Loosen nuts (B).

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7. Adjust (shorten) turnbuckle (C) until cam (D) is fully engaged under control pivot wedge (E).

   • When adjusted properly, cam (D) and control surface (F) are parallel.
   
   

8. Verify that the control handle moves freely in and out of the slot in the frame before tightening nuts.

9. Adjust the equalizer nut. (See Park Brake Adjustment.)

10. Move control levers out to the neutral lock position.

11. 
    TCT005202-UN-05SEP12

    Adjust control set screw (G) until you notice the control lever begin to move forward in the control slot.

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12. Move control lever in and out to verify that it is not binding with the frame slot. Engage and release park brake.

13. Do not pull pedal back manually.

    If brake pedal binds or does not fully release, back off the set screw one flat. Check pedal again for binding. If pedal still binds, back off the right-hand set screw by one flat. Repeat as necessary.

Neutral Interlock Adjustment—Hand Brake

TCT006386-UN-25FEB13

TCT006387-UN-25FEB13

Components removed for clarity.

1. Perform adjustment only if neutral interlock system does not adequately lock control sticks in neutral, or if brake or steering system has been disassembled.

   Park machine safely. (See “Park Machine Safely” in the Safety section.)

2. Tilt seat forward.

3. Loosen nut (B) on carriage bolt at the bottom of the park brake handle.

4. Disconnect end of spring (C) from the bracket (D).

5. Remove clip (E) and washer (F). Remove link (G) from the pin on the bracket.

6. Make sure that the bolt and nut (H) on park brake handle is tight.

7. Lock park brake.

8. Move control levers to the neutral lock position.

9. 
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   Control lever removed for clarity.

   
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   Press down on the return shaft bracket (where the spring attaches), while simultaneously tightening the nut on the carriage bolt at the bottom of the handbrake.
   • Press down until cam (I) is fully engaged under control pivot wedge (J).
   • When adjusted properly, cam (I) and control surface (K) are parallel.
   
   

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10. Attach the spring to the return shaft bracket.

11. Install the link onto the pin of the return shaft bracket. Secure with washer and clip.

12. Verify that the control handle moves freely in and out of the slot in the frame before tightening nuts.

13. Adjust the equalizer nut. (See Park Brake Adjustment.)

14. Move control levers out to the neutral lock position.