|
|
Spec. |
| |
|
| 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° |
| |
|
| Axle, Rear
|
Semi-floating |
|
Gear ratio |
4.3 to 1 |
|
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" |
| |
|
| Battery
|
|
|
Ampere hour capacity |
84 |
|
Cells |
3 |
|
Specific Gravity |
|
|
Charged |
1.250 |
|
Discharged |
1.150 |
| |
|
| Brake, Hand
|
External
Contracting |
|
Location |
Rear of
transmission |
|
Drum diameter |
7" |
|
Lining width |
2" |
|
Lining to drum clearance |
1/16" |
| |
|
| Brake, Service
|
Hydraulic
Internal Expanding |
|
Drum Diameter |
11" |
|
Shoe width |
1-1/2" |
|
Shoe to drum clearance: |
|
|
Bottom |
0.006" |
|
Top |
0.012" |
|
Pedal to floor board free play, maximum |
3/4" |
| |
|
| 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" |
|
End play |
0.003" to
0.005" |
| |
|
| Clutch
|
Single plate |
|
Driven disc diameter |
8-7/8" |
|
Release bearing |
Ball |
|
Release lever to bearing clearance |
3/16" |
|
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" |
|
Clearance |
0.0015" to
0.002" |
|
Side play |
0.003" to
0.005" |
|
Weight variation limit |
1/4 oz. |
|
Alignment limits at pin: |
|
|
Twist |
0.002" |
|
Bend |
0.002" |
| |
|
| Cooling
|
Thermo-syphon |
|
Capacity |
3 1/2 Gallons |
| |
|
| Crankshaft
|
|
|
Bearings |
Babbitt |
|
Diameter and length |
|
|
No. 1 |
2-1/4" x 2
1/8" |
|
No. 2 |
2-1/4" x
1-5/8" |
|
No. 3 |
2-1/4" x
2-3/8" |
|
Clearance |
0.001" to
0.002" |
|
End play |
0.003" to
0.005" |
|
Run-out center bearing maximum |
0.001" |
| |
|
| Cylinders
|
|
|
Maximum taper before reconditioning |
0.0015" |
|
Maximum out of round before reconditioning |
0.002" |
|
Reconditioning working limits |
0.0005" |
| |
|
| Engine
|
L-head |
|
Number of cylinders |
4 |
|
Bore |
3-5/8" |
|
Stroke |
4-1/4" |
|
Piston displacement |
175.4 cu. in. |
|
N.A.C.C. horsepower |
21.03 |
|
Developed horsepower |
45 |
| |
|
| Frame
|
Pressed steel |
|
Length |
153-1/4" |
|
Depth of channel |
5" |
|
Flange width |
1-3/4" |
|
Thickness |
9/64" |
|
Cross members |
4 |
| |
|
| Fuel System
|
Vacuum |
|
Tank capacity |
11 gal. |
| |
|
| Generator
Maximum cold charging rate at 20 MPH |
16 amp. |
| |
|
| Ignition
|
Semi-automatic |
|
Breaker Points |
|
|
Breaker point gap |
0.020" |
|
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" |
| |
|
| Lamps
|
|
|
Head |
1110 |
|
Instrument |
63 |
| |
|
| Lubrication, Engine
|
Pressure |
|
Oil capacity |
4 quarts |
|
Oil pressure at 30 MPH |
35 to 40 P.S.I. |
| |
|
| Piston Pins
|
Clamped in rod |
|
Diameter and length |
3/4" x 3" |
|
Clearance in piston |
0.0005" to
0.001"
Light finger push at normal room temperature |
| |
|
| Piston Rings
|
|
|
Number per piston |
3 |
|
Width |
|
|
Upper - Compression |
1/8" |
|
Center - wiper |
1/8" |
|
Lower - oil control |
1/8" |
|
Gap clearance |
|
|
Upper - compression |
0.010" to
0.015" |
|
Center - wiper |
0.010" to
0.015" |
|
Lower - oil control |
0.005" to
0.010" |
|
Lower - oil control |
0.004" to
0.009" |
|
Maximum side clearance in groove |
0.003" |
| |
|
| Pistons
|
Light alloy |
|
Length |
4-1/8" |
|
Feeler gauge clearance |
|
|
Head |
0.022" |
|
Skirt |
|
|
Top |
0.003" |
|
Bottom |
0.001" |
|
Weight variation limit |
1/4 oz. |
| |
|
| Speedometer Data
|
|
|
Tire size |
4.75/20 |
|
Axle ratio |
4.3 to 1 |
|
Speedometer gear teeth in transmission |
5-15 |
| |
|
| Springs
|
Semi-elliptic |
|
Front: |
|
|
Length and width |
35-1/2" x
1-3/4" |
|
Leaves |
9 |
|
Shackle washer clearance |
1/16" |
|
Rear: |
|
|
Length and width |
53-1/2" x
1-3/4" |
|
Leaves |
|
|
Coupe and Roadster |
7 |
|
Touring |
8 |
|
Sedans |
9 |
|
Shackle washer clearance |
7/16" |
| |
|
| Steering Gear |
Worm and
sector |
| |
|
| Tires
|
4.75/20 |
|
Pressure |
|
|
Front |
40 lbs. |
|
Rear |
35 lbs. |
| |
|
| Transmission
|
3 speed |
|
High and intermediate |
Sliding gear |
|
Type of gears |
Spur |
| |
|
| Valves
|
|
|
Inlet |
Chrome nickel |
|
Exhaust |
Silcrome |
|
Clearance diameter of opening |
|
|
Inlet |
1-9/16" |
|
Exhaust |
1-7/16" |
|
Stem diameter |
3/8" |
|
Clearance in guide |
|
|
Inlet |
0.002" to
0.004" |
|
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 |
|
|
Length, valve closed |
1-7/8" |
|
Tension, valve closed |
38 to 40 lbs. |
|
Limit of compression |
1-9/16" |
