2001/10/01 Caterpillar


Improved Support for the Air Conditioner Compressor {7320}

Usage:

953C 2ZN
Track-Type Loader:
953C (S/N: 2ZN1-UP)

Description of Change: New parts are now used in production in order to provide better support for the air conditioner compressor and for the associated lines. A new bracket assembly, which is shown in Illustration 1, has been added in order to provide upper support.

Support for the engine front housing has also been improved by the addition of a new front cover assembly, which includes a plate that is 8 mm (0.315 inch) thick. To eliminate interference between the back of the fan drive bracket and the front of the new front cover assembly, grind the fan drive bracket as Illustration 3 indicates. Table 1 provides a complete listing of the parts that are needed in order to provide optimum support for the air compressor. When you install these parts due to a failure of the engine front housing or a failure of the compressor bracket, order replacements for the failed parts in addition to the parts that are listed below.

Adaptable To: The new parts are effective with 953C (S/N: 2ZN4653-UP). The new parts are adaptable to 953C (S/N: 2ZN1-4652).

Table 1
PARTS LIST    
Item     Quantity     Part Number     Part Name    
1     1     7C-1445     Cover    
2     1     139-3526     Gasket    
3     1     204-9051     Bracket Assembly    
4     1     061-9455     Seal    
5     1     136-0823     Front Cover Assembly    
6     2     5C-7261     Nut M8x1.25    
7     2     7I-8935     Socket Head Bolt M8x1.25    
8     2     8T-4224     Hard Washer    
9     1     8T-6408     Bolt M10x1.5    



Illustration 1g00819390

A top view of the engine is shown.




Illustration 2g00819364

See illustration 3 for an explanation of Detail (Z) .




Illustration 3g00830335

Grind the back of fan drive bracket (4) in the area of interference (5) to a minimum of 1 mm deep before you mount front cover assembly (3) .




Illustration 4g00819406

(C) 140 mm (5.5 inch)

(D) 165 mm (6.5 inch)

(E) 65 mm (2.56 inch)

(4) Sound Suppression Cover

(5) Piece to cut

Note: If your machine has a sound suppression cover, the sound suppression cover (4) must be reworked in order to install 204-9051 Bracket Assembly. Illustration 4 shows the cover.

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