PLATE 2028097 - Caterpillar

Using excessive heat to remove the gear may cause damage to the crankshaft. Do not heat the gear over 204° C (400° F).
Remove the crankshaft gear using the 1P-2321 Puller Group. Heat the gear with a torch to ease its removal
After removing the crankshaft gear, check the front crankshaft gear journal dimension at four equally spaced locations (12 O'clock, 1:30, 3:00, and 4:30). The measurement should be 158.75 0.03 mm (6.24999 0.00118 inch). If the journal is undersized, the crankshaft may need to be replaced, which requires removal of the engine from the machine.Note: The 2W-3878 Crankshaft Gear should have a bore with an inside diameter of 158.620 0.03 mm (6.24487 0.00118 inch). The interference fit between the gear and the crankshaft should be a minimum of 0.075 mm (0.00295 inch).
Remove the camshaft thrust plate bolts to allow the camshaft to slide forward. Slide the camshaft forward no more than 38.0 mm (1.49606 inch).
Remove the 6I-3749 Idler and Weight Gear Assembly by removing the four 2B-2695 Bolts. Slide the assembly forward the same distance as the camshaft was moved
Remove the five bolts holding the 7N-2484 Idler Drive Shaft to the block.
The 6I-3749 Idler and Weight Gear Assembly and drive shaft will now slide sideways away from the camshaft gearNote: The parts book does not show a 6I-3749 Idler and Weight Gear Assembly. This is the parts service gear assembly for 6I-3750 Gear Assembly and 4N-0343 Sleeve Bearing.
Remove the 2W-8375 Gear (Oil Pump) and the 100-8178 Gear (Oil Pump Idler).
Install a new 2W-3878 Gear onto the crankshaft.Gear Installation
Heat the crankshaft gear to 204° C (400° F), for one hour before installation.
Illustration 311 g06283523
Install the gear onto shoulder of crankshaft.
(A) 3.0 mm (0.11811 inch)
(1) Gear slot and alignment dowel pin.
(2) Block
(3) Crankshaft
Install the gear onto the crankshaft journal aligning the slot in the gear with the dowel in the crankshaft. Install the gear 3.0 mm (0.11811 inch) from the shoulder of the crankshaft as shown in Illustration 311.Note: The elapsed time from removal of gear from the heating unit to installation onto the crankshaft should be no more than one minute.
Illustration 312 g06283630
Push the gear, using the installation tool, onto the shaft to its final location.
(2) Block
(3) Crankshaft
(4) 1A-4273 Bolt and 5P-8247 Washer
Use the fabricated gear installation tool to finish pushing the gear onto the crankshaft to the proper depth as shown in Illustration 312. This must be done before the gear shrinks and locks.
Once the plate portion of the tool is against the face of the crankshaft, install and tighten the two bolts. This will hold the tool in place until the gear cools. The gear must be against and flush with the ring of the installation tool.
After the gear has cooled, check to make sure the runout of the gear and the depth on the crankshaft is correct. The gear runout should not exceed 25.0 mm (0.98425 inch).
Install a new 6I-3749 Gear Assembly