ANTENNA AS 2848532 - Caterpillar

Calculate the runout of the gear by subtracting the minimum measured distance from the maximum measured distance.
If the run out measurement is 0.25 mm (.010 in) or less, and the gear is within the specified dimension (A), the gear alignment is acceptable. Install a new 2W-1733 Seal and a 4W-8089 Damper.
If the runout measurement is greater than 0.25 mm (.010 in), the face of the gear is not within the specified dimension (A, Illustration 4), or the gear was repositioned previously, replace the gear train and damper assembly using the "Salvage Procedure" in this Guideline.
Salvage Procedures
Before starting the salvage procedure, fabricate the gear installation tool as shown in the "Fabricated Tooling" section.
Gear Removal
This procedure can be completed without removing the engine from the machine.
The front gear train must be replaced along with the front crankshaft damper.
Pin time the fuel pump and flywheel.
Support the front of the engine, with overhead support, before proceeding with disassembly of the front gear train.
Drain the sump oil.
Remove the oil pan, front main bearing cap, and oil pump.
Remove the water pump and lines to allow removal of the front housing.
Remove the automatic timing advance cover and front housing.
Move the camshaft forward.
Remove the 3T-5447 Hydraulic Pump and Drive from the flywheel housing.
Remove the rear 2W-8038 Camshaft Gear.
Remove valve covers.
Using the appropriate tools, pull the push rods and valve lifters out of the way [lifters need to be pulled up approximately 25 mm (1.0 in)] to allow movement of camshaft.
Using excessive heat to remove the gear may cause damage to the crankshaft. Do not heat the gear over 204øC (400øF).
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 (6.250 +/- .001 in). If the journal is undersized, the crankshaft may need to be replaced, which requires removal of the engine from the machine. Before removing the engine, please contact the 3400 Service Engineer, at (309) 578-4436 or (309) 578-8629.
Note: The 2W-3878 Crankshaft Gear should have a bore with an inside diameter of 158.620 +/- 0.03 mm (6.245 +/-> .001 in). The interference fit between the gear and the crankshaft should be a minimum of 0.075 mm (.0030 in).
Remove the camshaft thrust plate bolts to allow the camshaft to slide forward. Slide the camshaft forward no more than 38.0 mm (1.50 in).
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 (refer to Parts Book SEBP2049, 6I-3745 Front Gear Group).
After the five bolts are removed from the block, the drive shaft will slide forward out of the block.
The 6I-3749 Idler and Weight Gear Assembly and drive shaft will now slide sideways away from the camshaft gear.
Note: The parts book