C1.1, C1.5 and C2.2 Engines for Caterpillar Built Machines Governor - Adjust Caterpillar

Note: The setting of the front housing is only necessary if the front housing is damaged or if the front housing must be renewed.

Record the Governor Settings

If the front housing has been removed, install the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Install".

The setting of the low idle stop screw and the high idle stop screw must be recorded. The settings are recorded to ensure that the governor operation is restored.

Note: Engine speed must be recorded from the crankshaft.

1. Operate the engine until the normal operating temperature is reached.

2. Use Tooling (F) to record the engine rpm at low idle.

3. Accelerate the engine to high idle. Use Tooling (F) and record the engine rpm as "Speed A".
   Show/hide table

   Illustration 1	g01494533
   Typical example

   Show/hide table

   Illustration 2	g01445067

4. Remove tamper proof caps (1).

5. Record Protrusion (X) of the high idle stop screw (4).

6. Record Protrusion (Y) of the low idle stop screw (5).

7. Release locknut (3). Turn high idle trimmer screw (2) for four turns counterclockwise and tighten locknut (3).

8. Accelerate the engine to high idle. Use Tooling (F) and record the engine rpm as "Speed B".

   Note: The recorded "Speed B" will be lower than the recorded "Speed A" .

Removal of the Old Front Housing

Illustration 3	g01490633

1. Remove fuel injection pump (6). Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove and Install" for the correct procedure.

2. Remove the crankshaft pulley. Refer to Disassembly and Assembly, "Crankshaft Pulley - Remove".
   Show/hide table

   Illustration 4	g01490998

3. Remove front housing (7). Refer to Disassembly and Assembly, "Housing (Front) - Remove" for the correct procedure.

4. Remove the gasket (8). Ensure that the face of the front plate is clean.
   Show/hide table

   Illustration 5	g01494273

5. Install Tooling (E) to lever assembly (9). Tighten tooling (E) to a torque of 0.4 N·m (3.540 lb in).
   Show/hide table

   Illustration 6	g01494293

6. Remove start spring (10) and replace the start spring with Tooling (D).

7. Install the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Install" for the correct procedure.

   Note: Do not install a gasket.

8. Install the fuel injection pump to the cylinder block. Install the original shim. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove and Install" for the correct procedure.
   Show/hide table

   Illustration 7	g01494333

9. Install Tooling (C) into cylinder block (11).

10. Install Tooling (B) into Tooling (C).

11. Assemble Tooling (A).

12. Install Tooling (A) into Tooling (B) until the extension on Tooling (A) touches the rack of the fuel injection pump.
    Show/hide table

    Illustration 8	g01446121

13. Push Tooling (A) into Tooling (B) for a further 2 mm (0.0787 inch). Lock Tooling (B) to retain Tooling (A) in position. Set Tooling (A) to read 2.00 ± 0.01 mm (0.0787 ± 0.0004 inch).
    Show/hide table

    Illustration 9	g01446123

14. Push plunger (12) of Tooling (A) several times to seat the rack of the fuel injection pump. When the plunger is gently released, check that Tooling (A) reads 2.00 ± 0.01 mm (0.0787 ± 0.0004 inch).

    Note: If the rack of the fuel injection pump has heavy resistance to movement, remove tooling (A). Remove the fuel injection pump. Wash the fuel injection pump with a suitable cleaner. Install the fuel injection pump. Repeat steps 12, 13, and 14.

Setting the New Front Housing

Note: Do not move the position of Tooling (A), Tooling (B), or Tooling (C) in the cylinder block.

1. Pull plunger (12) of Tooling (A) until the plunger has reached the fully out position. Use a suitable clip to retain the plunger in this position.

2. Remove the fuel injection pump. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove and Install" for the correct procedure.

3. Remove the original front housing. Refer to Disassembly and Assembly, "Housing (Front) - Remove" for the correct procedure.

4. Disassemble the original front housing. Refer to Disassembly and Assembly, "Housing (Front) - Disassemble" for the correct procedure.

5. Assemble the replacement front housing with the parts that were removed from the original front housing. Install a new fuel screw and a new locknut. Refer to Disassembly and Assembly, "Housing (Front) - Assemble" for the correct procedure.

6. Remove Tooling (E) from the original front housing. Install Tooling (E) to the lever assembly of the replacement front housing. Tighten Tooling (E) to a torque of 0.4 N·m (3.5 lb in).

7. Remove Tooling (D) from the original front housing. Install Tooling (D) into the replacement front housing.

8. Install the replacement front housing. Refer to Disassembly and Assembly, "Housing (Front) - Install" for the correct procedure.

   Note: Do not install a gasket.

9. Install the fuel injection pump to the cylinder block. Install the original shim. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove and Install" for the correct procedure.

10. Remove the clip from plunger (12) of Tooling (A).

Setting the Fuel Screw

Show/hide table

Illustration 10	g01494853

Show/hide table

Illustration 11	g01446186

1. Release the plunger on Tooling (A). Do not move the position of Tooling (A), Tooling (B), or Tooling (C) in the cylinder block.

2. Use a ring spanner (Box wrench) (14) to retain the locknut of the fuel screw in position.

3. Use an allen wrench (13) to rotate the allen head screw. Observe the reading on the dial indicator. Adjust the allen head screw until the indicator reads 2.00 ± 0.01 mm (0.0787 ± 0.0004 inch).

4. Tighten the locknut to a torque of 6 N·m (55 lb in) to retain the allen head screw in position. The fuel screw is now set.

5. Ensure that the reading of Tooling (A) is 2.00 ± 0.01 mm (0.0787 ± 0.0004 inch).

Final Installation of the New Front Housing

Show/hide table

Illustration 12	g01495413

1. Remove Tooling (A) and Tooling (B).

2. Remove Tooling (C).

3. Remove the fuel injection pump. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove and Install" for the correct procedure.

4. Remove the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Remove" for the correct procedure.
   Show/hide table

   Illustration 13	g01494353

5. Remove Tooling (D). Install original start spring (10).
   Show/hide table

   Illustration 14	g01494273

6. Remove Tooling (E) from lever assembly (9).
   Show/hide table

   Illustration 15	g01490998

7. Install a new gasket (8). Ensure that the gasket is clean and free from damage.

8. Install the replacement front housing (7). Refer to Disassembly and Assembly, "Housing (Front) - Install" for the correct procedure.
   Show/hide table

   Illustration 16	g01494533
   Typical example

   Show/hide table

   Illustration 17	g01445067

   Show/hide table

   Illustration 18	g01446551

9. Set the Protrusion (X) of the high idle stop screw (4) to the same dimensions as the stop screws on the original front housing.

10. Set the Protrusion (Y) of the low idle stop screw (5) to the same dimensions as the stop screws on the original front housing.

11. Release locknut (3). Set the high idle trimmer screw (2) to the fully out position. Turn the screw clockwise for two turns. Tighten locknut (3).

12. Install the fuel injection pump to the cylinder block. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove and Install" for the correct procedure.

13. Start the engine and allow the engine to reach normal operating temperature.

14. Run the engine at low idle and adjust the low idle stop screw (5) to the speed that was previously recorded, prior to the original front end removal.

15. Run the engine at high idle and adjust the high idle stop screw (4) to the speed that was previously recorded as "Speed B".

16. Run the engine at high idle and release the locknut (3). Adjust the high idle trimmer screw (2) to the speed that was previously recorded as "Speed A". Tighten the locknut (3).

    Note: The recorded "Speed A" will be higher than the recorded "Speed B" .

17. Ensure correct operation of the engine.

18. Install tamper proof caps (1) to the high idle trimmer screw (2) and the high idle screw (4). Install the tamper proof cap (not shown) to fuel screw (15).

    Note: Care should be taken when the tamper proof cap is installed to the fuel screw.