The Differential Group is Improved on Certain 789D Off-Highway Trucks {3256, 3258, 3281} Caterpillar


The Differential Group is Improved on Certain 789D Off-Highway Trucks {3256, 3258, 3281}

Usage:

789D SHH
Off-Highway Truck/Tractor
789D (S/N: SPD1-77001; SHH1-322)

Description Of Change: The differential group is improved on the machines listed above. New thrust bearings and new bevel gears with an improved surface finish increases the service life of the differential group.

Adaptable To:

Table 1
Required Parts 
Item  Qty  New Part Number  Part Name  Former Part Number (1) 
570-2404  Housing As  130-6445 
453-2979  Thrust Bearing  7I-5876 
453-2978  Thrust Bearing Race 
448-0727  Bevel Gear  335-3209 
569-2647  Pinion  5T-5185 
570-2406  Differential Housing As  7I-5878 
(1) The former part number listed is for reference only and may differ.


Illustration 1g06395435
(A) 8W-9543 Differential Gp


Illustration 2g06395440
Exploded view of 8W-9543 Differential Gp (A)
( 1) 570-2404 Housing As
(2) 453-2979 Thrust Bearing
(3) 453-2978 Thrust Bearing Race
(4) 448-0727 Bevel Gear
(5) 569-2647 Pinion
(6) 570-2406 Differential Housing As

------ WARNING! ------

Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.


New 570-2404 Housing As (1) replaces the former 130-6445 Differential Housing As in 8W-9543 Differential Gp (A).

New 453-2979 Thrust Bearing (2) and 453-2978 Thrust Bearing Race (3) replaces the former 7I-5876 Thrust Washer in 8W-9543 Differential Gp (A).

New 448-0727 Bevel Gear (4) replaces the former 335-3209 Bevel Gear in 8W-9543 Differential Gp (A).

New 569-2647 Pinion (5) replaces the former 5T-5185 Pinion in 8W-9543 Differential Gp (A).

New 570-2406 Differential Housing As (6) replaces the former 7I-5878 Differential Housing As in 8W-9543 Differential Gp (A).

Improved differential group (A) is adaptable to the machines within the listed serial numbers, and is effective in production with all the machines after the listed serial numbers.

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