2001/01/29 Caterpillar

Pipelayer:

561M (S/N: 1KW1-UP)

Description of Change:

Illustration 1	g00769107

The bracket for the ladder support can be improved in order to prevent cracking. Weld a gusset to the existing support plate in order to stiffen the assembly.

Adaptable To: The improvement is adaptable to 561M (S/N: 1KW1-298) Pipelayers. The ladder is relocated and the bracket is not necessary for (S/N: 1KW299-UP) Pipelayers.

Use the following procedure to prevent cracking.

Procedure for Fabrication

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Illustration 2	g00768545
Gusset dimensions (A) 6 mm (0.24 inch) (B) 108 mm (4.25 inch) (C) 50.4 mm (1.98 inch) (D) 30 mm (1.18 inch) (E) 30 mm (1.18 inch) diameter (F) 150 mm (5.91 inch) (G) 30 mm (1.18 inch)

1. Fabricate one gusset. Refer to Illustration 2 for the dimensions.

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Illustration 3	g00768546
(1) Fabricated gusset (2) 145-7304 Plate

2. Weld a 6 mm (0.24 inch) fillet weld at location (A) in order to join gusset (1) to bracket (2). Refer to Illustration 3.

3. Assemble the new bracket assembly to the machine.