4. Identification
Six identification plates are permanently attached to the compressor equipment. The manufacturer's nameplate (1) Corps
of Engineers identification plate (2) and transportation plate (3) are grouped together at the rear of the compressor
housing. The compressor instruction plate (4) is located on the inside of the rear access door on the engine side of the
compressor. The serial number plate (5) is attached to the upper oil pan adjacent to the oil-level gage on the engine side
of the compressor. The reservoir data plate (6) is attached to the top of the air receiver. When requisitioning spare parts
for this equipment, specify the Department of the Army registration and serial numbers (from Corps of Engineers
identification plate (2) and the manufacturer's serial number (from the serial number plate (5)).
5. Tabulated Data
a. General.
Manufacturer ............................................................................................................ Le Roi Company
Model........................................................................................................................ 210G1
Type ......................................................................................................................... V-8 crankcase with 4-cylinder engine
and 4-cylinder compressor.
Bore (all cylinders).................................................................................................... 5.5 in.
Stroke (all pistons).................................................................................................... 5.25 in.
Piston displacement ................................................................................................. 499 cu. in.
Engine compression ratio ......................................................................................... 5.45 to 1
Lubrication ................................................................................................................ Oil pump pressure system
Spark Plugs .............................................................................................................. Champion XE5-8-64
Spark plug gap ......................................................................................................... 0.023 to 0.028 in.
Firing order ............................................................................................................... 1-2-4-3
Valve arrangement ................................................................................................... Valve-in-head
Intake valve clearance.............................................................................................. 0.014
Exhaust valve clearance........................................................................................... 0.014
Distributor contact gap ............................................................................................. 0.020 in.
Starting motor ........................................................................................................... 4-volt Bendix drive
Battery charging generator ....................................................................................... 4-volt
Batteries ................................................................................................................... Four 6-volt, series connected
Cooling ..................................................................................................................... Liquid
Head bolt torques ..................................................................................................... 90 ft lbs
b. Performance.
Rated speed ............................................................................................................. 1,125 rpm
Rotation; flywheel end .............................................................................................. ccw
Number of stages, compressor ................................................................................ 1
Intake valve opens.................................................................................................... Top dead center
Intake valve closes ................................................................................................... 56 A. B. D. C.
Exhaust valve opens ................................................................................................ 46 B. B. D. C.
Exhaust valve closes ................................................................................................ 10 A. T. D. C.
Spark timing, above 1,000 rpm ................................................................................ 30 B. T. D. C.
Timing range at 1,000 rpm ....................................................................................... 30 min
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