3306 DIRECT INJECTION VEHICULAR ENGINE WITH NEW SCROLL FUEL – Fuel Ratio Control

Remove And Install Fuel Ratio Control


NOTICE

Keep all parts clean from contaminants. Contaminants put into the system may cause rapid wear and shortened component life.


1. Disconnect pressure line (3). Remove two bolts (2).

2. Move fuel ratio control (1) upward to disengage the fuel ratio control from the lever assembly in the governor.

3. Remove four O-ring seals (4) and screen assembly (5).

NOTE: The following steps are to install the fuel ratio control.

4. Inspect, replace and install the four O-ring seals (4) and the screen assembly (5).

5. Put the fuel ratio control (1) in position and engage the fuel ratio control with the lever assembly in the governor.

6. Install the bolts that hold the fuel ratio control and connect pressure line (3) to the fuel ratio control (1). See Testing and Adjusting for Fuel Ratio Control in Adjustment Procedure, Caterpillar Publication SENR2782-02.

Disassemble And Assemble Fuel Ratio Control

Start By:

a. remove fuel ratio control


NOTICE

Keep all parts clean from contaminants. Contaminants put into the system may cause rapid wear and shortened component life.


1. Remove two bolts, and the fuel ratio control. Remove O-ring seal (1).

2. Put tooling (A) in a vise as shown so that the station being used is not over the vise jaw. Place the fuel ratio control over the pin in tooling (A). Remove cover (2) and the gasket.


NOTICE

There is spring force behind cover (3). Hold cover (3) in position, and slowly remove the bolts that hold it to release the spring force.


3. Remove cover (3).

4. Remove nut (5) and stop (6).

5. Remove spring (9), washer (7), and diaphragm (10) from retainer (8). Remove retainer (8) from housing (11).

6. Remove nut (16) from extension (15), and remove the extension from retainer (8). Remove valve (12), spring (13) and O-ring seal (14).

7. Remove spring (18), retainer (17) and spring (19).

8. Remove piston assembly (20).

9. Use tooling (B), and remove snap ring (21) and the wave washers from valve assembly (22). Remove piston assembly (23). Remove seal (24).

10. If necessary, remove stem (26) from valve (25).

11. Clean and inspect all parts. Replace all parts that are worn or damaged.

NOTE: The following steps are to assemble the fuel ratio control.

12. Assemble stem (26) to valve (25) using 9S3265 Retaining Compound.

13. Put seal (24) on piston (23). Install piston (23) on valve assembly (22).

14. Put two wave washers in position on valve (22). Use tooling (B) to install the snap ring on the valve assembly.

15. Place housing (4) on tooling (A), and put tooling (C) into the bore of the housing. Lubricate tooling (C) with clean engine oil.

16. Put a small amount of clean oil on the seal of the piston assembly, and push piston assembly (23) into position with a smooth swift motion.

17. Place spring (9), retainer (17) and spring (19) in position in housing (4).

18. Put O-ring seal (14) on extension (15). Put spring (13) and valve (12) in position on the extension.

19. Lubricate O-ring seal (14) with clean engine oil. Install extension (15) in retainer (8). Install nut (16).

20. Put diaphragm (10), washer (7) and spring (9) in position on retainer (8). Install retainer (8).

21. Install stop (6) and nut (5) in the cover. Hold retainer (8) in position, and install cover (3) on the housing. Install the bolts that hold the cover. Tighten bolts to a torque of 9 ± 3 N·m (7 ± 2 lb ft).

22. Make a replacement of the gasket for cover (2), and install the cover.

23. Put O-ring seal (1) in position on the fuel ratio control and put the fuel ratio control in position on the governor. Make sure the flange on the end of the fuel ratio control is behind the groove (slot) in the lever. Install the bolts that hold the fuel ratio control in position.

NOTE: See Testing And Adjusting. Caterpillar publication SENR2782-02 for the adjustments to the fuel ratio control.

End By:

a. install fuel ratio control

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