1929 Specifications
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" |
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" |