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Spec. |
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Axle, Front
|
I-Beam
|
King Pin Bushings
|
Bronze
|
Upper
|
3/4" x 1-3/32"
|
Lower
|
3/4" x
1-15/32"
|
Knuckle thrust
|
Ball - Top
|
Wheel bearings
|
Taper-roller
|
Maximum end play
|
0.003"
|
Toe in
|
0" - 1/8"
|
Caster
|
0° - 2°
|
Camber
|
0° - 4°
|
Pivot Angle
|
7°
|
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Axle, Rear
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Semi-floating
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Gear ratio
|
4.3 to 1
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Drive gear
|
Spiral bevel
|
Diameter and width
|
8-5/8" x
1-3/16"
|
Gear and Pinion backlash
|
0.005" to
0.010"
|
Pinion shaft end play
|
0.0015"
|
Differential side gear and pinion backlash
|
0.017"
|
Axle shaft diameter outer bearing
|
1-3/8"
|
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Battery
|
|
Ampere hour capacity
|
84
|
Cells
|
3
|
Specific Gravity
|
|
Charged
|
1.250
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Discharged
|
1.150
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Brake, Hand
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External
Contracting
|
Location
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Rear of
transmission
|
Drum diameter
|
7"
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Lining width
|
2"
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Lining to drum clearance
|
1/16"
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Brake, Service
|
Hydraulic
Internal Expanding
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Drum Diameter
|
11"
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Shoe width
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1-1/2"
|
Shoe to drum clearance:
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|
Bottom
|
0.006"
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Top
|
0.012"
|
Pedal to floor board free play, maximum
|
3/4"
|
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|
Camshaft
|
|
Bearings
|
3
|
Size, diameter and length:
|
|
No. 1
|
1-1/4" x
1-9/16"
|
No. 2
|
2" x 1"
|
No. 3
|
1-1/4" x
1-3/8"
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End play
|
0.003" to
0.005"
|
| |
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Clutch
|
Single plate
|
Driven disc diameter
|
8-7/8"
|
Release bearing
|
Ball
|
Release lever to bearing clearance
|
3/16"
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Disc run-out at rim (Maximum)
|
0.015"
|
Spring tension
|
160 lb. to 170
lb. at 1-11/16"
|
Pedal free play
|
1-1/4" to
1-3/8"
|
| |
|
Connecting Rod
|
Drop forged I
section
|
Between centers
|
8-13/16"
|
Bearings
|
Babbitt cast
in rod
|
Diameter and length
|
2" x 1-3/8"
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Clearance
|
0.0015" to
0.002"
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Side play
|
0.003" to
0.005"
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Weight variation limit
|
1/4 oz.
|
Alignment limits at pin:
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Twist
|
0.002"
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Bend
|
0.002"
|
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Cooling
|
Thermo-syphon
|
Capacity
|
3 1/2 Gallons
|
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Crankshaft
|
|
Bearings
|
Babbitt
|
Diameter and length
|
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No. 1
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2-1/4" x 2
1/8"
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No. 2
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2-1/4" x
1-5/8"
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No. 3
|
2-1/4" x
2-3/8"
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Clearance
|
0.001" to
0.002"
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End play
|
0.003" to
0.005"
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Run-out center bearing maximum
|
0.001"
|
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Cylinders
|
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Maximum taper before reconditioning
|
0.0015"
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Maximum out of round before reconditioning
|
0.002"
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Reconditioning working limits
|
0.0005"
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Engine
|
L-head
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Number of cylinders
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4
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Bore
|
3-5/8"
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Stroke
|
4-1/4"
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Piston displacement
|
175.4 cu. in.
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N.A.C.C. horsepower
|
21.03
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Developed horsepower
|
45
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Frame
|
Pressed steel
|
Length
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153-1/4"
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Depth of channel
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5"
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Flange width
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1-3/4"
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Thickness
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9/64"
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Cross members
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4
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Fuel System
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Vacuum
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Tank capacity
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11 gal.
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Generator
Maximum cold charging rate at 20 MPH
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16 amp.
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Ignition
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Semi-automatic
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Breaker Points
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Breaker point gap
|
0.020"
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Cam Angle (Degrees)
|
52°
|
Set points to open before top dead center
|
0.050" piston
travel
|
Spark plugs
|
7/8"-18 S.A.E.
|
Original Plugs
|
AC C7
|
Gap
|
0.025"
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Lamps
|
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Head
|
1110
|
Instrument
|
63
|
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Lubrication, Engine
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Pressure
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Oil capacity
|
4 quarts
|
Oil pressure at 30 MPH
|
35 to 40 P.S.I.
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Piston Pins
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Clamped in rod
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Diameter and length
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3/4" x 3"
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Clearance in piston
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0.0005" to
0.001"
Light finger push at normal room temperature
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Piston Rings
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Number per piston
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3
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Width
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Upper - Compression
|
1/8"
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Center - wiper
|
1/8"
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Lower - oil control
|
1/8"
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Gap clearance
|
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Upper - compression
|
0.010" to
0.015"
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Center - wiper
|
0.010" to
0.015"
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Lower - oil control
|
0.005" to
0.010"
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Lower - oil control
|
0.004" to
0.009"
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Maximum side clearance in groove
|
0.003"
|
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Pistons
|
Light alloy
|
Length
|
4-1/8"
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Feeler gauge clearance
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|
Head
|
0.022"
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Skirt
|
|
Top
|
0.003"
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Bottom
|
0.001"
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Weight variation limit
|
1/4 oz.
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Speedometer Data
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Tire size
|
4.75/20
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Axle ratio
|
4.3 to 1
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Speedometer gear teeth in transmission
|
5-15
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Springs
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Semi-elliptic
|
Front:
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Length and width
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35-1/2" x
1-3/4"
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Leaves
|
9
|
Shackle washer clearance
|
1/16"
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Rear:
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Length and width
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53-1/2" x
1-3/4"
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Leaves
|
|
Coupe and Roadster
|
7
|
Touring
|
8
|
Sedans
|
9
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Shackle washer clearance
|
7/16"
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Steering Gear
|
Worm and
sector
|
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Tires
|
4.75/20
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Pressure
|
|
Front
|
40 lbs.
|
Rear
|
35 lbs.
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Transmission
|
3 speed
|
High and intermediate
|
Sliding gear
|
Type of gears
|
Spur
|
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Valves
|
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Inlet
|
Chrome nickel
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Exhaust
|
Silcrome
|
Clearance diameter of opening
|
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Inlet
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1-9/16"
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Exhaust
|
1-7/16"
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Stem diameter
|
3/8"
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Clearance in guide
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Inlet
|
0.002" to
0.004"
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Exhaust
|
0.0035" to
0.004"
|
Seat angle
|
45°
|
Lift
|
9/32"
|
Tappet clearance
|
|
Hot engine
|
|
Inlet
|
0.004"
|
Exhaust
|
0.006"
|
For valve timing
|
|
Inlet
|
0.008"
|
Exhaust
|
0.008"
|
Timing
|
|
Inlet opens past top center
|
5°
|
Piston travel
|
0.010"
|
Inlet closes past bottom center
|
45°
|
Duration of inlet
|
220°
|
Exhaust opens before bottom center
|
49°
|
Exhaust closes past top center
|
3°
|
Piston travel
|
0.004"
|
Duration of exhaust
|
232°
|
Springs
|
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Length, valve closed
|
1-7/8"
|
Tension, valve closed
|
38 to 40 lbs.
|
Limit of compression
|
1-9/16"
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