2010/12/09 Caterpillar

Compact Track Loader:

279C (S/N: MBT1-UP)

289C (S/N: JMP1-UP)

299C (S/N: JSP1-UP)

Multi Terrain Loader:

277C (S/N: JWF1-UP)

287C (S/N: MAS1-UP)

297C (S/N: GCP1-UP)

Skid Steer Loader:

246C (S/N: JAY1-UP)

256C (S/N: DWS1-UP)

262C (S/N: MST1-UP)

272C (S/N: RED1-UP)

Description of Change: Improvements have been made to the air conditioning and heating ducts for the machines listed above. These improvements will increase the performance of the air conditioning and heating systems by providing increased sealing and contamination prevention.

Adaptable To: Several improvements have been made to increase duct sealing and sealing of the fresh air filter. Improvements include:

• New material to Improve the duct stiffness

• A new backing plate added to the fresh air filter to increase sealing compression

• Increased seal height to improve duct sealing

Refer to Table 1 below for the new and former part numbers.

Table 1

New Part Number	Description	Former Part Number
357-8751	Duct As	258-4258
357-8752	Duct As	258-4257
357-8801	Air Screen	258-4384
357-8807	Cover As	258-4264

The air conditioning and heating system improvements are adaptable to the following machines:

• 246C (S/N: JAY1-4994)

• 256C (S/N: DWS1-1694)

• 262C (S/N: MST1-3857)

• 272C (S/N: RED1-2268)

• 277C (S/N: JWF1-2411)

• 279C (S/N: MBT1-1852)

• 287C (S/N: MAS1-1992)

• 289C (S/N: JMP1-1673)

• 297C (S/N: GCO1-1701)

• 299C (S/N: JSP1-1329)

The air conditioning and heating system improvements are effective in production on the following machines:

• 246C (S/N: JAY4995-UP)

• 256C (S/N: DWS1695-UP)

• 262C (S/N: MST3858-UP)

• 272C (S/N: RED2269-UP)

• 277C (S/N: JWF2412-UP)

• 279C (S/N: MBT1853-UP)

• 287C (S/N: MAS1993-UP)

• 289C (S/N: JMP1674-UP)

• 297C (S/N: GCO1702-UP)

• 299C (S/N: JSP1330-UP)