The lubricaton of the Model A engine is by pump, gravity feed and splash. The oil pump is of the rotary gear type located in the sump of the crankcase and is constantly submerged in oil. When a pump is located above the oil level, a check valve is required to hold the pump's prime, and this becomes ineffective through dirt getting under the seat of the valve or through air in the feed line running from the pump to the oil sump. The Model A oil pump, protected in this way, and with it's simple, sturdy construction, eliminates the need for an oil gauge. An oil gauge is an indication that the system of oil circulation is not reliable.

LEVEL INDICATOR	LEFT SIDE OF ENGINE
RESERVOIR	IN VALVE CHAMBER
RETURN PIPE DIAMETER	5/8" INSIDE
SUMP CAPACITY	1 IMPERIAL GALLON
PUMP CAPACITY	1 GALLON PER MINUTE AT 1000 RPM
DRIVE	BY WORM ON CAMSHAFT
LOCATION	RIGHT SIDE OF ENGINE IN BASE
SCREEN	BRASS MESH
SHAFT	5/8" STEEL-BRONZE BUSHING MOUNTED
TYPE	GEAR PRESSURE

Page designed by Jim Mason July, 2007