GENERAL SPECIFICATIONS
|
| Model Designation:
69M |
| Wheel base: 118 |
| Valve Location: In
block |
| Bore and
Stroke: 3-3/16
x 3-3/4 |
| Piston displacement, Cubic
Inches: 239.4 |
| Compression
ratio: 6.75 |
| Maximum
Brake Horsepower: 100
@ 3800 RPM |
| Maximum
Torque Lbs.Ft. @ RPM: 180
@ 2000 RPM |
| Normal
Oil Pressure Pounds: 30 |
TUNE UP SPECIFICATIONS
|
| Spark Plug
Make: Champion H10 |
| Spark Plug
Gap, Inch: .030 |
| Firing
Order: 15486372 (front
to rear: Right bank 1-2-3-4, left bank 5-6-7-8)
|
| Ignition
Timing: None |
| Engine
Idle Speed, RPM: 475 |
| Cylinder
Head Torque Lbs.Ft.: 50-60 |
| Compression
Pressure & Cranking Speed: 110
Min. |
| Voltage & Polarity: 6
volts, positive ground |
PISTON AND RING SPECIFICATIONS
|
| Fitting
Pistons with Scale: Pistons
removed from above. Shim thickness: w/sleeves and
aluminum pistons: .0025; without sleeves: .002 |
| Pounds
Pull on Scale: 6 to 12 |
Ring End
Gap: In tapered bores,
fit rings in tightest portion of ring travel
Compression: .014
Oil: .014 |
| Clearance in Groove: Compression:
.0015-003; Oil: .0015-.003 |
| Wristpin
Diameter, Inch: .7501-.7504 |
VALVE SPECIFICATIONS
|
Operating
Clearance:
Intake:
.012 Cold Exhaust: .014 Cold |
| Valve Seat
Angle, degrees: 45 |
Valve Timing: (BTDC
= before top dead center; ATDC = after top dead
center)
Intake
opens: TDC
Exhaust
Closes: 6 ATDC |
Valve Spring
Pressure Pounds at Inches Length:
Inner
Spring: 37 @ 2-1/8 |
| Valve Stem
Clearance: Intake: .0025-.0045; Exhaust:
.0025-.0045 |
ENGINE BEARING SPECIFICATIONS
|
Connecting Rod Bearings:
Journal
Diameter, Inches: 2.1390
Bearing Clearance, Inch: .0017-.0038
Rod End Play, Inch: .006-.014
Rod Bolt Tension: Lbs.Ft.: 40 |
Main Bearings:
Journal
Diameter, Inches: 2.4990
Bearing clearance: .000-.003
Shaft End Play: .002-.006 (Thrust
on Rear Bearing)
Main Bolt Tension: Lbs.Ft.: 80 |
CAPACITY DATA
|
Cooling
System:
Without
heater: 22 quarts
With heater: 23 quarts |
| Fuel Tank: 17
gallons |
| Engine
Oil: 5 quarts |
| Transmission:
2-3/4 |
| Rear Axle: 2-1/2
pints |
VACUUM BRAKE DISTRIBUTOR SPECIFICATIONS
|
| Distributor part number: 59A-12127
(distributor rotates counter-clockwise) |
| Cam Angle,
degrees: 36 (total dwell,
both breakers) |
| Breaker Point opening, Inch: .014-.016 |
| Condenser
Capacity: .21-.25
Mfds. |
| Breaker Arm Spring Tension: 20-24
Oz. |
Centrifugal
Advance: (degrees
at RPM of distributor)
Advance starts 2
degrees @ 250 BTDC
Full Advance: 12 degrees @ 1725 |
GENERATOR SPECIFICATIONS
|
| Generator
Number: 21A-10000
(generator rotates clockwise, 6 volts, Positive
Ground) |
| Generator
output: 30 @ 1700
RPM |
| Brush Spring
Tension: 30 oz. |
REGULATOR SPECIFICATIONS
|
| Regulator
Number: 8A-10505A |
Cutout
Relay:
Voltage
to close points: 6.3
Armature Air Gap: .017 |
| Voltage
Regulator Setting: 7.3
volts |
| Current
Regulator Setting: 30
amps |
| Current
and voltage armature air gap, Inch: .035 |
STARTING
MOTOR SPECIFICATIONS
|
| Part number: 7RA-11001 |
| Bush Spring
Tension, Ounces: 48-56 |
| No Load
Test: 70
amps, 6 volts @ 3000 RPM |
| Torque
Test: 700 Amps, 3.5
volts, Torque, Lbs.Ft.: 16 |
WHEEL ALIGNMENT SPECIFICATIONS
|
Caster,
Degrees
Limits: +4-1/2
to + 9
Desired: +6-3/4 |
Camber,
Degrees
Limits: +1/4
to +1
Desired: +5/8 |
| Toe-In,
Inches: 1/16 |
Toe-Out
on Turns, Degrees: (If
toe-out is incorrect, when other adjustments are
correct, look for bent steering arms.)
Outer wheel: 20
Inner Wheel: 23
to 24 |
Kingpin
Angle, or Steering Axis Degrees: (If
king pin or spindle support angle are incorrect,
but camber is correct, look for bent suspension
arms or steering knuckle support)
8 |
