2014/09/11 A New Procedure Is Available to Improve Reliability of Front Harness on 950K and 962K Wheel Loaders {1408} Caterpillar

Wheel Loader:

950K (S/N: R4A1-UP; J5M1-UP; FER1-UP)

962K (S/N: T6A1-UP; FLL1-UP; X4T1-UP)

Description of Change: A new assembly procedure and an improved front harness are now used on the machines described in this article. This upgrade will improve the durability of this component.

Adaptable To:

Table 1

Required Parts
Item	Qty	Part Number	Description
1	1	354-2385	Front Chassis Harness As

The improved Front Chassis Harness As is adaptable to the following machines:

• 950K (S/N: FER1-581)

• 950K (S/N: J5M1-1039)

• 950K (S/N: R4A1-2195)

• 962K (S/N: FLL1-270)

• 962K (S/N: T6A1-1007)

• 962K (S/N: X4T1-481)

The improved Front Chassis Harness As is effective in production in the following machines:

• 950K (S/N: FER582-UP)

• 950K (S/N: J5M1040-UP)

• 950K (S/N: R4A2196-UP)

• 962K (S/N: FLL271-UP)

• 962K (S/N: T6A1008-UP)

• 962K (S/N: X4T482-UP)

Rework Procedure

Illustration 1	g03724225
Locator tape positions on the front harness with reference to 40 pin connector (AA) 209 ± 10 mm (8.2 ± 0.4 inch) (BB) 504 ± 10 mm (19.8 ± 0.4 inch) (AL) Use 30 mm (1.18 inch) wide orange locator tape (BL) Use 30 mm (1.18 inch) wide orange locator tape (DD) 40 pin connector of the front harness

Remove the existing harness and replace with a new harness (same part number). Tape markings on the harness indicate clamping points.

Illustration 1 shows the locator tape positions on the front harness with reference to the 40 pin connector.

1. Measure and confirm that the first orange locator tape (AL) is centered at 209 ± 10 mm (8.2 ± 0.4 inch) mark from the back of the 40 pin connector (DD). Measure and confirm that the second orange locator tape (BL) is centered at 504 ± 10 mm (19.8 ± 0.4 inch) mark from the center of the first locator tape (AL). Location (BL) is also 713 mm (28.1 inch) from the back of the 40 pin connector of the harness.

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Illustration 2	g03724351
Front and back clamp locations of the harness at the machine hitch area of 950K and 962K Wheel Loaders (1) 354-2385 Front Chassis Harness As (CC) Minimum gap of 85 mm (3.3 inch) between the hitch bore boss top surface on engine end frame and the harness

2. Illustration 2 shows front clamp locations and back clamp locations of the harness at the machine hitch area of 950K and 962K Wheel Loaders.

3. Confirm that the frame clamps across the machine hitch secure the harness on the second locator tape (BL) on the front frame and the first locator tape (AL) on the rear frame. Locator tapes should not be visible after frame clamps are torqued down. Frame clamps should be centered on the locator tapes.

4. Measure and confirm that there is an 85 mm (3.3 inch) minimum gap (CC) between hitch bore boss top surface on the engine end frame and the harness. Refer to Illustration 2 for details. This action will ensure enough slack in the harness routing going across machine hitch in order to protect the harness from stretching too much as machine articulates.