2009/02/09 Caterpillar

Multi Terrain Loader:

247B (S/N: MTL5075-UP)

257B (S/N: SLK7300-UP)

277C (S/N: JWF1-UP)

287C (S/N: MAS1-UP)

297C (S/N: GCP1-UP)

Description of Change: Torque values have been improved for the Idler Wheel Groups on the listed models of multi terrain loaders.

Adaptable To:

Table 1

Required Parts
Item	Quantity	Part Number	Description
1	See Table 2.	8C-4436	Bolt (1/2-13 THD)
2	1	154-9731	Thread Lock Compound (10 mL)
		155-0695	Thread Lock Compound (50 mL)

If service is required, replace the current 8C-4436 Bolts with new 8C-4436 Bolts. Apply "High Strength" thread lock compound to the new bolts before installation of the new bolts. Refer to Table 3 for torque specifications.

Note: Follow the manufacturer's instructions for using the thread lock compound.

Table 2

Usage of 8C-4436 Bolts
Machine	Wheel Group	Quantity
247B2 257B2	280-5030 Idler Wheel Gp 295-3230 Idler Wheel Gp 295-3210 Bogie Wheel Gp	8 Bolts per wheel group
277C 287C 297C	258-3030 Idler Wheel Gp 320-8530 Idler Wheel Gp	12 Bolts per wheel group

Table 3

Improved Torque Values
Part Number	Part Name	Torque Specification
295-3230	Idler Wheel Gp	50 ± 5 N·m (37 ± 4 lb ft) (1)
280-5030	Idler Wheel Gp	50 ± 5 N·m (37 ± 4 lb ft) (1)
295-3210	Bogie Wheel Gp	150 ± 20 N·m (110 ± 15 lb ft) (2)

( 1 )	Tighten the bolts in a cross pattern. Turn the bolts by an additional 45° ± 5° after the torque is obtained.
( 2 )	Tighten the bolts in a cross pattern.

The improved torque values are adaptable to the following machines.

• 247B (S/N: MTL5075-6389)

• 257B (S/N: SLK7300-9257)

• 277C (S/N: JWF1-2107)

• 287C (S/N: MAS1-1783)

• 297C (S/N: GCP1-1528)

The improved torque values are effective in production with the following machines.

• 247B (S/N: MTL6390-UP)

• 257B (S/N: SLK9258-UP)

• 277C (S/N: JWF2108-UP)

• 287C (S/N: MAS1784-UP)

• 297C (S/N: GCP1529-UP)