3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Caterpillar


Crankshaft And Gear

Usage:

Remove Crankshaft And Gear

start by:

a) remove flywheel housing

b) remove timing gear cover

c) remove pistons

1. Turn the crankshaft until the "C" mark on the crankshaft gear is in alignment with the "C" mark on the camshaft gear as shown.

NOTE: The main bearings caps are installed with the part number toward the front of the engine. Each cap has a number on the bottom of the cap, which is the same as the number on the camshaft side of the cylinder block.

2. Remove the three center main bearing caps and thrust bearing.

3. Install one of the flywheel bolts in the end of the crankshaft. Fasten a hoist.

4. Remove the two end caps.


NOTICE

Be extra careful not to cause damage to the crankshaft journals when the crankshaft is removed.


5. Remove the crankshaft. The weight is 100 lb. (45 kg).

6. Remove the crankshaft main bearings from the cylinder block and from the main bearing caps.

7. Install tooling (A) and remove the gear from the crankshaft.

Install Crankshaft And Gear

1. Heat the crankshaft gear to a maximum temperature of 600°F (315°C). Install the gear on the crankshaft with the "C" mark on the gear toward the pulley end of the crankshaft.

2. Clean the area for the main bearings in the caps and block.

3. Install upper main bearings (1) (the bearing with oil hole) in the block and the lower main bearings in the caps. Put SAE 30W engine oil on all bearings, bolt threads and crankshaft journals.

4. Fasten a hoist and put the crankshaft in position in the cylinder block with the timing marks on the camshaft gear and crankshaft gear in alignment.


NOTICE

When bearing caps are installed, make sure the caps are installed with the part number toward the front of the engine and the number on the bottom of the cap is the same as the number on the camshaft side of the engine.


5. Install thrust main bearing (2) and all the caps. Tighten the bolts to a torque of 120 ± 10 lb.ft (160 ± 14 N·m).

NOTE: When the bearing clearance is checked the crankshaft will have to be pushed against the upper halves of the main bearings and held to get a measurement. The wire will not hold the weight of the crankshaft.

6. Check bearing clearance by removal of cap and installation of wire (A) between crankshaft and bearing. Tighten bolts to a torque of 120 ± 10 lb.ft. (160 ± 14 N·m). Remove cap and check thickness of wire which is the bearing clearance. Bearing clearance must be .0030 to .0066 (0.076 to 0.168 mm). The maximum permissible clearance is .010 in. (0.25 mm).

7. Check the crankshaft end clearance with tooling (B). The clearance is controlled by the thrust main bearing. End clearance of the crankshaft must be .0025 to .0190 in. (0.064 to 0.483 mm). The maximum permissible clearance with used bearings is .035 in. (0.89 mm).

end by:

a) install pistons

b) install timing gear cover

c) install flywheel housing

Caterpillar Information System:

3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Crankshaft Rear Seal And Wear Sleeve
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Flywheel Housing
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Flywheel Ring Gear
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Flywheel
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Timing Gears And Plate
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Camshaft Bearings
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Camshaft
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Oil Pump And Relief Valve
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Timing Gear Cover
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Crankshaft Front Seal
3204 VEHICULAR ENGINE FOR D3 TRACTOR, 931 TRACK-TYPE LOADER Crankshaft Front Pulley
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