| Engine
|
|
|
Power Lift
System
|
| Model
|
Onan, Model CCKB
|
|
Type
|
Hydraulic.
2.5 GPM (9.5 litres per minute) from the Hydrostatic Transmission charge pump.
|
| Type |
Gasoline, 4 cycle, twin opposed cylinders |
| Cylinder Material
|
Cast Iron |
|
Relief Valve Pressure
|
550-700 PSI (3799-4828
kPa) |
| Horsepower
@ 3600 RPM
|
19.5 (14.54kw)
|
|
Control
|
Hand
Operated
|
| Bore
and Stroke
|
3.25” (82.5mm) X 3.00” (76.2mm)
|
|
Hydraulic
Cylinder
|
2.5
inch (63.5mm) diameter - 4 inch (102mm) stroke
|
| Displacement
|
49.8 cubic inches (816cc)
|
|
3 Point Hitch (Optional)
|
| High
Speed
|
3850 RPM No Load; 3600 RPM Full Load
|
|
Type |
Flexible Swinging draft hubs with ball couplers |
| Idle Speed |
1200 RPM |
|
SAE & ASAE Category |
Meets Category 0 dimensions |
| Valves |
Positive rotating Stellite facing on valve heads |
|
Control |
Hydraulic, hand operated, same as power lift system |
| Valve Tappet Clearance
|
Intake .007" (0.152mm); Exhaust .016" (0.406mm) |
|
Drawbar |
| Valve Seats (Exhaust)
|
Replaceable, Stellite faced |
|
Type |
Single position - removable |
| Cooling System
|
Pressure air cooled, axial flow blower |
|
Height |
13 inches (0.33 m) |
| Carburetor |
Zenith - Horizontal draft, adjustable main jet |
|
Pin Size |
3/4 inch (17mm) |
| Choke |
Manually operated |
|
Brakes |
Individual double disc
type, can be locked together for simultaneous operation, parking brake is cam locking
type. |
| Air Cleaner |
Replaceable Dry Element |
|
Electrical System
|
| Fuel Pump |
Diaphragm type |
|
Battery |
45 Ampere hour 12 volt, sealed terminals |
| Governor
|
Cam gear driven, adjustable mechanical flyball, pressure
lubricated
|
|
Alternator |
20 Ampere flywheel
alternator with silicon diode rectifier |
| Breaker Point Gap |
.020 inch (0.508mm) |
|
Regulator |
Transistorized temperature compensated voltage regulator |
| Ignition Timing |
20º before top dead center |
|
Protection |
20 ampere circuit breaker |
| Spark Plug
|
Champion H-8 or Allis Chalmers No. 2067308
|
|
Lights |
Fender mounted sealed beams |
| Spark Plug Gap |
.025 inch (0.635mm) |
|
Dimensions |
| Lubrication System
|
Gear type oil pump, adjustable pressure relief valve, replaceable
oil filter
|
|
Wheelbase |
56
inches (1.4m)
|
| Length Overall |
85 inches (2.2m) |
| Starting Motor |
12 volt electric solenoid
|
|
Width (overall)
|
With Agricultural Tires (narrow setting) |
43-1/4 inches (1.1m) |
| Power Train |
|
|
With Agricultural Tires
(wide setting) |
48 inches (1.2m) |
| Clutch |
Foot pedal operated, double V-belt drive, clutch by
varying center distance between pulleys |
|
|
With Turf Tires |
50-1/2 inches (1.3m)
|
| Universal Joints |
Disc type, self aligning, no moving parts |
|
|
With High Flotation Tires
|
56-1/2 inches (1.4m)
|
Hydrostatic
Transmission
|
Sunstrand - Variable delivery piston pump with fixed stroke piston
type motor. Replaceable oil filter.
|
|
Ground Clearance (without drawbar)
|
15
inches (0.38m)
|
| Gear Transmission
|
3-Speed Sliding Spur gear,
Cast Iron transmission case, Rolling contact bearings |
|
Turning Radius (with Agricultural Tires at Wide
Setting) |
| Differential |
8 pinion, spur gear,
non-adjustable limited slip. Located in transmission case. |
|
|
Outside Front Tire |
Inside Rear Tire |
| Drop Housing |
Individual spur gears, rolling contact bearings, cast iron
case. |
|
Without using brake |
8 feet |
3 feet |
| Using steering brake |
6 feet |
1 foot |
| Steering |
Recirculating ball screw, manual operation. 3.2
turns stop to stop. |
|
Shipping Weight |
Approximately 1300 pounds (2860kg) |
| Seat
|
Standard lever operated seat,
adjustable from operator position. 4 inches (102mm) travel, front to rear. Spring
mounted, inclined ramp.
|
|
Operating Weight (with 180 lb operator) |
Rear - 1000 pounds (2200kg)
Front - 480 pounds 91058kg)
Approximate |
Front PTO
(Standard) |
12 volt electric solenoid actuated clutch, with automatic
brake. Speed equal to engine RPM. |
|
Ground Speed |
Approximate, engine at 3600 RPM |
| First Gear Range |
0-4.2 MPH Forward, 0-2.6 MPH Reverse |
| Rear PTO
(Optional)
|
|
Second Gear Range |
0-6.3 MPH Forward, 0-4.0 MPH Reverse |
| Third Gear Range |
0=10.4 MPH Forward, 0-6.2 MPH Reverse |
| Clutch |
12 volt electric solenoid
actuated. Rated at 100 ft-lbs (135 N.M.)
|
|
Liquid Type and Capacity |
| Fuel Tank |
3.8 gallons |
| Speed @ 3600 Engine RPM
|
2000 RPM
|
|
Engine Crankcase |
3.5 quarts (above 32ºF, SAE 30; below 32ºF, SAE 5W-30) |
| Drive |
Involute splined shaft |
|
Transmission and Hydraulic System |
6 quarts, Allis Chalmers Power Fluid 401 (Dextron) |
| Direction of Rotation |
Clockwise (viewed from the rear) |
|
Drop Housings, each |
0.5 quarts, Allis Chalmers Gear Lube 715 |
|
Source: AC Operator's Manual,
MODEL 720 Lawn & Garden Tractors, Part Number 1657026, November 1976.
|
