2009/06/01 Caterpillar

Excavator:

329D L (S/N: MNB1-UP; DJF1-UP; LFW1-UP; TAY1-UP)

329D (S/N: BFC1-UP; BBF1-UP; JHJ1-UP; RSK1-UP; WDK1-UP; TPM1-UP; BYS1-UP; SCY1-UP)

336D L (S/N: SKE1-UP; PRF1-UP; MPL1-UP; D3P1-UP; NLS1-UP; M4T1-UP)

336D (S/N: JBF1-UP; J2F1-UP; KDJ1-UP; W3K1-UP; MYP1-UP; JER1-UP; DTS1-UP; JBT1-UP; KKT1-UP; WET1-UP)

345C L (S/N: ELS1-UP)

345D L (S/N: DPA1-UP; HLC1-UP; RDC1-UP; RGD1-UP; RAE1-UP; YEE1-UP; RGG1-UP; EEH1-UP; RAJ1-UP; MLK1-UP; JKN1-UP; PBT1-UP; RBT1-UP)

345D (S/N: NEG1-UP; FES1-UP; BYW1-UP)

365C MH L (S/N: GWC1-UP)

365C L (S/N: MEM1-UP; FEN1-UP; PAR1-UP; MCS1-UP; MCY1-UP)

Mobile Hydraulic Power Unit:

329D MHPU L (S/N: J9D1-UP)

336D MHPU L (S/N: J6D1-UP)

345D MHPU (S/N: P5D1-UP)

365C MHPU (S/N: GSZ1-UP)

Description of Change: New motors have an improved cover assembly. The improved cover assembly prevents debris from entering the motor assembly. The debris could cause a failure of the front bearings in the motor.

Adaptable To: The new 336-1156 Motor As is available for the replacement of the former motor assembly for the air conditioner condenser in 324D, 325D, and 330D Excavators. The new 336-1157 Motor As is available for the replacement of the former motor assembly for the air conditioner condenser in 345C, 345D, and 365C Excavators.

Installation of the Motor Assembly for the Air Conditioner Condenser

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Illustration 1	g01773536
(A) Connection for the motor assembly

1. Disconnect wiring harness (A) for the motor assembly from the main harness.

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Illustration 2	g01773815
(B) Motor assembly (C) Flange nut

2. Remove four flange nuts (C) and motor assembly (B) from the machine. Retain the flange nuts for the installation of the new motor assembly.

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Illustration 3	g01775513
(A) Wiring harness (D) Bolt (F) Bolt assembly (G) Guard for the motor (H) Cable strap

3. Remove three bolts (D) and guard (G). Remove bolt assembly (F) and disconnect wiring harness (A) from the motor. Retain these parts for the installation of the new motor assembly. Cut cable strap (H) for the harness.

Note: Bolt assembly (F) is not used in the former motor assemblies for 345C, 345D, and 365C Excavators.

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Illustration 4	g01773556
New Motor Assembly

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Illustration 5	g01775653
(A) Wiring harness (B) Motor assembly (C) Flange nut (D) Bolt (F) Bolt assembly (G) Guard for the motor (H) Cable strap

4. Install the new motor assembly. Use the parts that were retained from Step 3. Install bolt assembly (F) and connect wiring harness (A) with the new motor assembly. Install three bolts (D) and guard (G) on the new motor assembly. Install a new cable strap (H) in order to secure the harness.

Note: Bolt assembly (F) is not used in the new motor assemblies for 345C, 345D, and 365C Excavators.

5. Use flange nuts (B) from Step 2 and install the new motor assembly. Connect wiring harness (A) with the main harness.