AXLE GP-DRIVE 7U4800 - Caterpillar

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(1) Gage
Attach gage (1) finger tight to the crankshaft using the counterweight bolts.Note: The dealer needs to fabricate the gage, refer to ""Gage Prints"" for more information on building the gage.
Apply Dykem to the material not covered by gage (1) or scribe a line along the edge of gage (1) if there is excess width material.If the material extends past the pad, possible damage to the counterweight can occur. Counterweights from pads that fail the gage test must be scrapped.
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(2) Tape
Cover all the crankshaft journals with tape (2) .
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Typical crankshaft without chamfer. (3) Scribed line
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Typical crankshaft with chamfer. (3) Scribed line (4) Chamfered edge
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Typical crankshaft chamfered with an end mill. (5) End mill
Machine a 45 degree chamfer along scribed line (3) with an end mill (5). Use a milling machine, a machining center, or handheld grinder.Note: In most cases, the crankshaft will only need one end of the counterweight pad milled.The preferred method is a milling machine or machining center.Note: Take care to ensure that overheating of the surface does not occur, as bluing will destroy the hardness of the crank.
Clean off abutment faces after de-burring.
Remove the protective tape from the crankshaft journals and clean the crankshaft.
Attach the counterweights using new bolts. Refer to Reuse and Salvage Guidelines, SEBF8156 for more information on installing the counterweights.
If any counterweights are replaced, then the crankshaft must be balanced. Refer to Reuse and Salvage Guidelines, SEBF8042 for more information on balancing the crankshaft.
Wash all debris off the crankshaft.
Inspect the crankshaft according to the Reuse and Salvage Guidelines, SEBF8039. If further machining or polishing is required, refer to Reuse and Salvage Guidelines, SEBF8042.Oil Plug Torque Check
Start the torque check by putting a paint line across the oil plug and crankshaft. This line will give a visual indication on the completion of this process if torque was not correct.
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(1) 2W-2288 Plug
Check the torque of each oil plug (1) .Torque oil plug ... 35 N m (26 lb ft)
If set torque is achieved without plug rotation, the oil plug has received the correct torque. Continue to the next oil plug until all oil plugs are checked.
If the set torque has not been achieved and there is oil plug rotation, the oil plug does not have the correct torque. Take a photo of the lines across the oil plugs which have changed position relative to the journals.
Record the findings of all the oil plugs.
If any loose oil plugs are found, remove all the oil plugs from the crankshaft and inspect the thread formation of the crankshaft and oil plug.
Inspect all the oil plug mounting threads by using a 5/8-18-2BUNF thread gage.
If any damaged threads are noticed or the thread plug gage is unable to insert, retap the oil hole by using a 5/8-18-2BUNF tap. Then try to insert the thread gage again.
If the oversize gage side fits after turn five, discard the used plug. Apply an even layer of Loctite 620 around the entire threads of the new