2014/11/25 Improved Bolted Joint for Rear Engine Mounts is Now Used On Certain Wheel Tractor Scrapers {1152, 1154} Caterpillar

Wheel Tractor-Scraper:

621H (S/N: DBK1-UP; HKK1-UP; NYY1-UP; EAZ1-UP)

621K (S/N: WTA1-UP; WTE1-UP; WTL1-UP; WTP1-UP)

623H (S/N: EJD1-UP; DBF1-UP)

623K (S/N: WTB1-UP; WTM1-UP)

627H (S/N: LCT1-UP; DBW1-UP)

627K (S/N: WTC1-UP; WTN1-UP)

Description of Change: Improved bolted joint for the rear engine mounts is now used on the machines listed above. The improved joint has a longer bolt, hardened washer, and friction shims which provide better robustness to the joints and extend the service life.

Adaptable To:

Table 1

New Parts List
Item	Quantity	Part Number	Description
1	1	174-9692	Spacer
2	1	7X-0369	Bolt

Secure engine mount to the flywheel housing using new spacer (1) and new bolt (2). Apply red Loctite 263 to the threads of the bolts before assembly.

New spacer (1) and new bolt (2) are adaptable to machines and effective in production with machines that are listed in Table 2.

Table 2

Sales Model	Adaptable to Machines	Effective in production with Machines
627H	S/N:DBW1-UP	-
	S/N:LCT1-UP	-
623H	S/N:DBF1-UP	-
	S/N:EJD1-UP	-
621H	S/N:DBK1-UP	-
	S/N:EAZ1-UP	-
	S/N:HKK1-UP	-
	S/N:NYY1-UP	-
621K	S/N:WTA1-109	S/N:WTA110-UP
	S/N:WTL1-101	S/N:WTL102-UP
	S/N:WTE1-104	S/N:WTE105-UP
	S/N:WTP1-103	S/N:WTP104-UP
623K	S/N:WTB1-127	S/N:WTB128-UP
	S/N:WTM1-104	S/N:WTM105-UP
627K	S/N:WTC1-147	S/N:WTC148-UP
	S/N:WTN1-103	S/N:WTN104-UP

Illustration 1	g03717716

Illustration 2	g03717717
View of area A

Table 3

New Parts List
Item	Quantity	Part Number	Description
1	1	174-9692	Spacer
2	1	7X-0369	Bolt
3	2	466-7518	Shim

For machines HKK and NYY equipped with 380-9794 Tractor Conversion Ar, use new parts that are listed in Table 3 to secure engine mount to the flywheel housing. Apply red Loctite 263 to the threads of the bolts before assembly.

For machine WTE equipped with 453-8535 Steel Mill Ar, use new parts that are listed in Table 3 to secure engine mount to the flywheel housing. Apply red Loctite 263 to the threads of the bolts before assembly.

For machine WTP equipped with 453-8536 Steel Mill Ar, use new parts that are listed in Table 3 to secure engine mount to the flywheel housing. Apply red Loctite 263 to the threads of the bolts before assembly.