1998/04/20 Caterpillar

771D (6JR),
775D (6KR) Quarry Trucks;
769D (5TR),
773D (7ER) Off-Highway Trucks

Description of Change: A thicker 9P-5391 Block is available to facilitate body pivot pin assembly and prevent distortion of body pivot pin plate. The 9P-5391 Block is 5 mm (.20 in) thicker and is a direct replacement for the former 4V-0870 Block. Refer to the following Illustrations for block assembly information.

Illustration 1.
Typical view of 9P-5391 Block. From mild steel.

(A) 25 mm (.98 in).

(B) 50 mm ± 1.5 mm (1.96 ± .059 in).

(C) 25 mm (.98 in).

(D) 50 mm ± 1.5 mm (1.96 in ± .059 in).

(E) 25 mm (.98 in)

(F) Ø11-A 1/2-13-2B Thread. All corners 6 mm (.24 in) maximum radius.

Illustration 2.
Typical view of truck body assembly.

Illustration 3.
Typical Detail A from truck body assembly.

(A) 9P-5391 Block.

(B) 100 ± 1 mm (3.94 ± .04 in)

(C) 55 ± 1.5 mm (2.17 ± .059 in)

(D) 110 ± 1.5 mm (4.33 ± .059 in). (W1) Weld 1.5 mm Square Groove over 8 mm Fillet, 4 Blocks.

Adaptable To: The 9P-5391 Block is effective during second quarter 1998 production on 771D (6JR), 775D (6KR) Quarry Trucks; 769D (5TR), 773D (7ER) Off-Highway Trucks and is adaptable to all earlier models.