2. To adjust the linkage, loosen the locknut at the carburetor rod clevis, as shown in Figure 69. With the hand throttle and carburetor lever in fun open position, lengthen or shorten the rod as necessary to connect it to the throttle lever. Tighten the lock nut.
COMPENSA TO R ROO
3. With the engine at normal operating temperature, set the idle speed to 450-475 rpm. 4. At this rpm, the governor arm should be contacting the end of the compensator rod with a minimum of spring tension. Adjust the compensator spring as required. <
GOVERNOR ARM
S. With the engine running under no load, open the hand throttle to the wide open position. If the engine rpm registers 2200 rpm on Series 501 through 70l tractors or 2400 rpm on Series BOO through 901 tractors, the governor is properly set. To adjust the linkage for the recommended speed, loosen the lock nut on the maximum speed adjustment stop, Figure 69, Start the engine and set the hand throttle until the ProofMeter registers the correct rpm for the model being checked, then slide the maximum speed adjustment stop against the stop bracket on the cylinder block. Tighten the maximum speed adjustment stop lock nut.
figure 69-Governor Clnd Control Linkage Adju$tments
8. If working on a row crop tractor, move the pedestal into place and tighten the attaching holts. 9. Install the radiator upper and the lower hose.
10. Fill the radiator with coolant and check for leaks. 11. Adjust the governor linkage as detailed below.
F. Setting Governed Engine Speed 1. Before attempting to set the engine governed speed, make certain that the governor and carburetor throttle lever are in the full open position. This can be checked by disconnecting the throttle rod at the carburetor and moving the hand throttle lever to the full open position. If the throttle rod cannot be connected to the carburetor without moving the governor lever, the linkage must be adjusted.
6. If the throttle has a tendency to creeP. remove the cotter pin from the castellated nut on the bellcrank, Figure 69, Tighten the nut as required to increase the spring tension. Install the cotter pin.
CAMSHAFT AND CAMSHAFT GEAR The camshaft cannot be removed with the engine in the tractor. If the front of the camshaft is provided with a tapped hole, as they were on earlier models, it is possible to remove the camshaft gear after the cylinder front cover and governor have been removed.
A. Camshaft Removal 1. Remove the engine from the tractor and mount it in an engine stand. 2. Remove the cylinder front cover, governor or sleeve and slinger on diesel engines.
Later model engines are provided with a snap ring instead of a bolt to retain the gear after it has been pressed on the shaft. The procedure for camshaft gear replacement will be after the camshaft has been removed from the engine.
3. Remove the flywheel and engine rear plate. 4. Remove the hydraulic pump drive gear cover, gasket and the pump drive gear from the rear of the camshaft. Figure 70.
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