953C Track-Type Loader Track - Check/Adjust Caterpillar


Track - Check/Adjust
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953C Track-Type Loader [SEBU7495]
UNDERCARRIAGE
TRACK ADJUSTER & RECOIL GP
953C Track-Type Loader Track - Check/Adjust
1.1. Check
2.1. Adjust
3.1. Bolt Torque for Track Shoes

Check



Illustration 1g00994333

Check the track adjustment. Check the track for wear and for excessive dirt buildup. Replace the track if the track is worn. Clean the track, if necessary.

  1. Move the machine forward for a distance of two times the length of the machine. Allow the machine to stop without the use of the service brake. Shut off the engine.


    Illustration 2g00655990

  2. Stand on the track between the front idler and the track carrier roller in order to produce as much track sag as possible.

  3. Attach one end of a string to the grouser tip on the track shoe that is directly above track carrier roller (1). Make the string tight by pulling on the string. Attach the opposite end of the string to the grouser tip on the track shoe that is directly above front idler (2).

  4. Measure the distance between the string and the tip of the grouser that is on the track shoe directly between the front idler and the track carrier roller in order to obtain dimension (A).

  5. Dimension (A) should be approximately 50.0 mm (2.0 inch). If dimension (A) is not correct, adjust the track.

Adjust

------ WARNING! ------

Grease is under high pressure.

Grease coming out of the relief valve under pressure can penetrate the body causing injury or death.

Do not watch the relief valve to see if grease is escaping. Watch the track or track adjustment cylinder to see if the track is being loosened.

Loosen the relief valve only one turn.


  1. Move the machine in a forward direction approximately 15.25 m (50 ft). Allow the machine to stop without the use of the service brakes. Shut off the engine. Adjust the tracks while you are in the machine's typical operating conditions. If packing conditions prevail on the job, the tracks should be adjusted without removing any packed material.


    Illustration 3g00994405

  2. Loosen the bolts and remove the cover for the track adjusting mechanism.

  3. Add grease with a grease gun in order to move the idler forward until the track is fully tight.


    Illustration 4g00289130

  4. Use a straight edge against the face. Mark the rod with a pencil or with a marking pen. Make a mark that is in line with the face.

  5. Mark the rod 10 mm (.40 inch) toward the idler from the first mark.

  6. Open the relief valve. Allow the idler to move back until the second mark is behind the face. Close the relief valve.

  7. Use the grease gun to move the idler forward until the second mark is in line with the face.


    Illustration 5g00484870

  8. Measure dimension (X), as shown above. Dimension (X) is the distance from the face of the bulkhead to the center of the pin in the yoke. If dimension (X) is less than 134 mm (5.3 inch), proceed to Step 9.

    If dimension (X) is greater than 134 mm (5.3 inch), the front idler must be moved forward to a secondary position. Refer to Power Train Disassembly and Assembly, SENR1877, "Track - Adjust" for this procedure.

  9. Install the cover and tighten the bolts to a torque of 75 ± 15 N·m (55.50 ± 11 lb ft).

  10. Repeat Step 2 through Step 9 for the other track.

Bolt Torque for Track Shoes



Illustration 6g00289131

The torque requirement for track shoe bolts is 170 ± 40 N·m (120 ± 30 lb ft). Tighten the bolts for an additional 120 degrees. If you are using bolts with a master link, tighten the bolts to a torque of 170 ± 40 N·m (120 ± 30 lb ft). Tighten the bolts for an additional 180 degrees.

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