Auxiliary Controls

AIR FUEL RATIO CONTROL TROUBLESHOOTING

177

PNEUMATIC SPEED SETTING CONTROL TROUBLESHOOTING

178

179

GOVERNORS FOR 3500 SERIES ENGINES

GOVERNOR OIL PUMP

GOVERNOR OIL SUPPLY GOVERNOR OIL PUMP ROTATION

1. Oil passages. 2. Passage for oil supply. 3. Passage for oil drain.

The governor drive adapter has four passages with seals. Passages (2 and 3) on the right side are used when the governor is installed -on the right side of the engine. Passage (2) is the oil supply to the governor. Passage (3) is the oil drain port for the governor.

Passages (I1) with the seals are used when the governor is installed on the left side of the engine.

OIL PASSAGES IN GOVERNOR HOUSING

4. Passage (oil drain). 5. Groove in governor pump housing for O-ring seal. 6. Passage (oil supply).

Passage (4) is for oil drain and passage (6) is for -the -oil supply in the 316l Governors.

No gasket is used between the governor and the drive adapter housing. A seal in groove (5) on the outside of the oil pump housing seals between the governor and the large bore in the adapter housing. Replace the large seal and the four counterbore seals each time the governor is removed and installed.

180

Check the direction of the oil pump rotation before the governor is installed on the engine.

Two arrows are cast into the oil pump housing. One arrow indicates counterclockwise, and the other clockwise. A reference ROTATION V is -cast in the bottom of the governor housing.

In the above illustration, the counterclockwise arrow is in alignment with the ROTATION V. This is the correct direction of rotation for the 3161 Governor when it is installed on the right hand side of standard rotation 3500 Series Engines.

PUMP ROTATION DECAL

A decal on the outside of the governor housing indicates the direction of governor rotation. This oil pump is set for counterclockwise direction as shown by the decal.

If the direction of rotation of the governor and oil pump is changed, a new decal must be installed with the decal arrow in the correct direction.