3114, 3116 and 3126 MUI Engine Governors Caterpillar

1. Remove the storage cover and the gasket from the front of the reservoir on the governor calibration bench.

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Illustration 1	g00656234
Governor Calibration Bench (1) Drive coupling

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Illustration 2	g00656286
(2) Inlet fitting for the fuel transfer pump (3) Outlet fitting for the fuel transfer pump (4) Fitting for the fuel ratio control (5) Inlet fitting for the fuel transfer pump from the fuel filter base

2. Remove the large O-ring seal from the front of the governor. Align the drive coupling on the calibration bench with the governor drive gear by rotating the governor until the two drive pins in drive coupling (1) engage with the governor drive gear.

3. When the drive pins engage with the governor drive gear, rotate the governor in order to align the mounting holes in the governor housing with the mounting holes in the governor calibration bench.

4. To fasten the governor to the calibration bench, use the same bolts and washers that are used to fasten the governor to the engine. If the governor mounting bolts are not available, use three 6V-5218 Bolts with three 9M-1974 Hard Washers .

5. Install fittings (2), (3), and (5) in the governor. Install fitting (4) if the governor is equipped with a fuel ratio control.

Note: Step 6 is optional. If the governor calibration bench can successfully perform the entire procedure, then the fuel transfer pump can remain in position on the governor.

6. Remove the fuel transfer pump from the governor housing. Refer to the Disassembly and Assembly, "Governor (Type) - Disassemble" section in this manual for additional information.

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Illustration 3	g00656323
(6) Line from the fuel transfer pump (7) Line to the sump (8) Pressure line from the filter base

7. Connect line (7) from the sump to fitting (3) for the fuel transfer pump outlet.

8. Connect line (8) from the filter base to fitting (5) for the oil inlet on the governor.

9. Connect line (6) from the fuel transfer pump to fitting (2) for the inlet fitting of the fuel transfer pump.

10. If the governor is equipped with a fuel ratio control, connect a regulated air supply (hand pump or squeeze pump) to the fuel ratio control. Turn on the regulated air supply in order to pressurize the fuel ratio control.

    Note: A regulated air supply of 140 to 210 kPa (20 to 30 psi) must be used to avoid damage to the fuel ratio control.

11. Install the pressure gauge that is supplied with the governor calibration bench on the quick disconnect fitting on the filter housing for the lubricating oil.

    Note: Ensure that the fuel shutoff solenoid is latched in the RUN position. To latch the fuel shutoff solenoid in the RUN position, refer to the Systems Operation, "Fuel Shutoff Solenoid" topic in this manual. If the fuel shutoff solenoid is a nonlatching solenoid, remove the fuel shutoff solenoid with a 9U-5120 Spanner Wrench and plug the opening.

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Illustration 4	g00656348
(9) Oil collector cup (10) Bracket

12. Install oil collector cup (9). Remove bracket (10) from the storage location and install bracket (10) on the calibration bench, as shown.

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Illustration 5	g00656363
(9) Oil collector cup (11) Throttle lever (12) Lever (13) Typical example of a calibration pin

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Illustration 6	g00656402
(13) Typical example of a calibration pin (14) Clevis pin

13. Install lever (12) on throttle lever (11). Turn throttle lever (11) clockwise in order to move clevis pin (14) away from the governor housing. This movement will permit calibration pin (13) to be installed.

14. Remove the collar from calibration pin (13). Insert the calibration pin through the hole in oil collector cup (9) then into clevis pin (14) of the governor output shaft.

15. Slide the collar over the end of calibration pin (13) until the calibration pin contacts clevis pin (14) .

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Illustration 7	g00656503
(12) Lever (13) Typical example of a calibration pin (15) Spring (16) Base

16. Connect one end of spring (15) to the hole in lever (12). Connect the other end of spring (15) to the hole in base (16) for the tachometer.

17. Connect the test bench to an electrical outlet.

18. Turn the switch for the pump to the ON position in order to start the lubricating oil pump. The pressure of the lubricating oil should stabilize at 205 to 275 kPa (30 to 40 psi).

    Note: When the oil pressure is stabilized and the throttle lever is held in the high idle position by spring (15), calibration pin (13) should be in contact with the governor housing.

    Note: When a governor that has been previously adjusted is being checked, calibration pin (13) must contact the governor housing. If calibration pin (13) does not contact the governor housing, the governor must be completely readjusted. Refer to the Testing and Adjusting, "Governor (Type) - Adjust" section in this manual.

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Illustration 8	g00778778
Typical example of the load stop adjustment screw on Type I, Type II, Type III and Type IV Governors (17) Load stop adjustment screw

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Illustration 9	g00656540
Typical example of the load stop adjustment screw on Type V, Type VI and Type VII Governors (17) Load stop adjustment screw

19. If calibration pin (13) does not contact the governor housing during the adjustment of a new governor or a rebuilt governor, use a 1U-6672 Rack Adjusting Wrench to turn load stop adjustment screw (17) until calibration pin (13) contacts the governor housing.

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Illustration 10	g00656610
(10) Bracket (13) Typical example of a calibration pin (15) Spring (18) 6V-6106 Dial Indicator Gp (19) Screw

20. Place the 1U-8815 Indicator Contact Point on the stem of the 6V-6106 Dial Indicator Gp (18). Install dial indicator (18) into bracket (10). Adjust the position of bracket (10) so that the contact point on the dial indicator stem is positioned in the center of the clevis pin.

21. Refer to the TMI data for the governor test bench in order to determine the load stop settings for the governor. If the governor load stop settings are 9.00 mm or higher, refer to the Testing and Adjusting, "Setting the Governor Load Stop Dimension for More Than 9.00 mm" topic in this manual.

    Note: The calibration dimension is the reference point for all other adjustments that are performed on the calibration bench. The calibration dimension is normally 8.00 mm (0.315 inch). The initial calibration dimension must be correct. If a governor load stop setting of 9.00 mm (0.354 inch) or greater is required, an alternate calibration method must be performed in order to allow the dial indicator to read the extra travel.

22. Adjust the position of dial indicator (18) on bracket (10) so that the dial indicator reads 8.00 mm (0.315 inch). Tighten screw (19) in order to lock the dial indicator in position. Check the adjustment dimension and adjust the dial indicator, if necessary.

23. When the dial indicator remains at the 8.00 mm (0.315 inch) dimension, rotate the throttle lever clockwise toward the low idle position. Remove calibration pin (13) and the collar.

24. Turn the switch on the pump to the OFF position.

Note: For previously adjusted governors or for field return governors that need to be checked, refer to the appropriate Testing and Adjusting, "Governor (Type) - Check" section of this manual.

Note: If a new governor or a rebuilt governor requires a change of the settings, refer to the appropriate Testing and Adjusting, "Governor (Type) - Adjust" section of this manual.