New Biodiesel Compatible Hose Assemblies are Now Used in the Fuel Lines Group on Certain 773E Off-Highway Trucks {1274} Caterpillar

Off-Highway Truck/Tractor

773E (S/N: ASK1-1450)

Description Of Change: New hose assemblies are now used in the fuel lines group on certain 773E Off-Highway Trucks.

The new hose assemblies are compatible to use with B15 and B20 biodiesel fuel.

Adaptable To: New hose assemblies replace the former hose assemblies in the 226-7579 Fuel Lines Gp.

Certain clips and elbow assembly are also replaced with new clips and elbow assembly in the 226-7579 Fuel Lines Gp.

Refer to the Table 1 for the new hose assemblies, clips, and elbow assembly used in the 226-7579 Fuel Lines Gp.

The new parts listed in Table 1 are adaptable to the machines within the listed serial numbers, and are effective with all machines after the listed serial numbers.

Use the following procedure to update the fuel lines group with the new hose assemblies.

Note: Follow all the safety precautions before carrying out any work on the machine.

Installation of 488-9360 Hose As between Fuel Tank and Primary filter group

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Illustration 1	g06107286
View of inner side of left-hand frame (A) Fuel tank (1) 488-9360 Hose As (2) 383-6118 Clip

1. Remove former 236-5242 Hose As from fuel tank (A) along the left-hand inner frame and replace with 488-9360 Hose As (1). Use two 383-6118 Clips (2) to mount 488-9360 Hose As (1) to the inner frame.
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   Illustration 2	g06107793
   View of hose routing above the steering box assembly (1) 488-9360 Hose As (3) 6D-4244 Clip

2. Continue routing 488-9360 Hose As (1) above the steering box assembly from left to right using two 6D-4244 Clips (3) in place of the former 1S-0994 Clips.
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   Illustration 3	g06107808
   View of hose routing to the primary filter group (1) 488-9360 Hose As (3) 6D-4244 Clips

3. Route 488-9360 Hose As (1) along the frame and up toward the primary filter group using 6D-4244 Clips (3) to secure to the frame.
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   Illustration 4	g06108256
   View of primary filter group location inner side of right-hand frame (B) Former fitting (C) Primary filter group (1) 488-9360 Hose As (4) 148-8354 Elbow As

4. If not previously completed, remove former hose (B) along with the related fitting from the connection on primary filter group (C).

5. Connect 148-8354 Elbow As (4) onto primary filter group (C) where fitting (B) was removed.

6. Attach 488-9360 Hose As (1) to 148-8354 Elbow As (4).

Installation of 488-9362 Hose As Between Fuel Tank and Fuel Return Manifold

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Illustration 5	g06108268
View of left inner frame (D) Former hose 240-8598 Hose As

1. Remove former return hose assembly (D) from between the fuel tank and the fuel manifold in the engine.

   Note: Unless specified otherwise, retain all mounting hardware for reuse.

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   Illustration 6	g06108327
   View of new hose route. (A) Fuel tank (2) 383-6118 Clip (5) 488-9362 Hose As

2. Connect 488-9362 Hose As (5) to fuel tank where the old hose was removed.

3. Route 488-9362 Hose As (5) back along the left-hand inner frame towards the engine and use two 383-6118 Clips (2) installed previously to secure hose assembly (5) in place.
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   Illustration 7	g06112935
   View of the rear of the engine (5) 488-9362 Hose As (6) 9M-8406 Clip (7) 329-1681 Clip

4. Finish installing 488-9362 Hose As (5) by routing hose (5) up the rear side of the engine and connecting the hose where former hose (D) was removed.

5. Secure 488-9362 Hose As (5) using one 9M-8406 Clip (6) and one 329-1681 Clip (7).

Installation of 488-9361 Hose As Between Primary Filter Group and Engine

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Illustration 8	g06108399
Top view of the engine underneath the hood (3) 6D-4244 Clip (8) 488-9361 Hose As

1. Remove the existing hose assembly between the primary filter group and the engine.

2. Install 488-9361 Hose As (8) where the former hose was removed.

3. Use one 6D-4244 Clip (3) to secure hose assembly (8) to the top of the engine.