D353 INDUSTRIAL & MARINE ENGINES Caterpillar


Idler Shaft

Usage:

Remove Idler Shaft

start by:

a) remove upper housing.

1. Using a nylon strap and hoist lift idler shaft (1) from housing. Weight is 95 lbs. (43 kg).

Install Idler Shaft

1. Using a nylon strap and hoist lower idler shaft (1) into the bearing bores of the gear box. Weight is 95 lbs. (43 kg).

end by:

a) install upper housing.

Disassemble Idler Shaft

start by:

a) remove idler shaft.

1. Loosen bolt on end of idler shaft using tool (A).

2. Remove bolt (1), and retainer (2).

3. Remove bearing (3).

4. Pull reverse gear and two bearings from idler shaft with tool (B).

Assemble Idler Shaft

1. The taper on the idler shaft and reverse driven gear must be clean. Use cleaning solvent. DO NOT USE KEROSENE.

2. Put the reverse driven gear on the idler shaft taper. Let weight of gear seat it on taper. Check the distance from the top of the shaft to the gear with a depth micrometer.

3. Press reverse gear on shaft using tool (A) until the gear moves .030 to .046 in. (0.76 to 1.17 mm). Check movement with depth micrometer.

4. Install roller bearings with the correct bearing race. The serial number (1) on the bearing must be the same as the serial number (2) on the bearing race.

5. Install tapered roller bearings, races, and spacers (3) as shown on the reverse driven gear end of idler shaft.

6. Install roller bearing and race (4) on idler shaft.

7. Install retainer (5) and retainer bolt (6).

8. Tighten retaining bolt to a torque of 1000 to 1390 lb. ft. (1350 to 1880 N·m) using tool (B).

end by:

a) install idler shaft.

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