2005/07/18 Caterpillar

Excavator:

345B (S/N: 6XS1-UP; 6MW1-UP; 8KW1-UP)

345B L (S/N: 5WS1-UP; 7KS1-UP; 2SW1-UP; 8RW1-UP; 9CW1-UP)

345B Series II (S/N: ALD1-UP; AKJ1-UP; AMN1-UP)

345B L Series II (S/N: CCC1-UP; AMD1-UP; FEE1-UP; AMJ1-UP; CDJ1-UP; AYR1-UP; AKX1-UP)

Description of Change: New insulation is added to the sheet assembly for the engine firewall. The insulation seals the open spaces between the sheet assemblies in the firewall assembly. If the hydraulic hoses in the auxiliary hydraulic lines group fail, the insulation prevents sprayed hydraulic fluid from entering the engine compartment.

Adaptable To: The new 273-7750 Insulation and the new 273-7751 Insulation are added to the 146-5003 Sheet As. The new insulation is adaptable to the models that are listed. Use the information that follows in order to modify the sheet assembly in the firewall and add the new insulation.

Illustration 1	g01177429
Typical Firewall Assembly (A) Open spaces

1. Procure the required parts that are listed in Table 1.

Show/hide table



Illustration 2	g01177449

2. Open the engine hood. Remove sheet (B) and sheet (C). Refer to Illustration 2.

Show/hide table



Illustration 3	g01177463
View Of The Firewall Assembly From The Main Hydraulic Control Valve (D) Sheet assembly (E) 374 mm (14.75 inch) length of the 5P-8292 Seal (F) 200 mm (7.9 inch) length of the 5P-8292 Seal (G) 260 mm (10.25 inch) length of the 5P-8292 Seal

3. Remove sheet assembly (D). Install the lengths of the 5P-8292 Seal. Use the 5H-2471 Adhesive in order to bond the seal to the sheet. Remove any excess adhesive. Allow the bond to cure. Reinstall sheet assembly (D). Refer to Illustration 3.

Show/hide table



Illustration 4	g01177480
View Of The Firewall Assembly From The Engine Compartment (H) 273-7750 Insulation (J) 273-7751 Insulation (K) Surface for the adhesive

4. Clean the surfaces (K) of the insulation. Install the insulation (J) and insulation (H) to the existing liner and the frame. Use the 5H-2471 Adhesive in order to bond the insulation to the sheet. Remove any excess adhesive. Allow the bond to cure. Refer to Illustration 4.

5. Reinstall sheet (B) and sheet (C) that was removed in Step 1.