620 Specifications |
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ENGINE
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Universal
Joints
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no moving
parts
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Make
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Onan
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Hydrostatic
Transmission
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Sundstrand -
Variable delivery piston type pump with fixed stroke piston type motor. Replaceable oil
filter.
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Model
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CCKB
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Cycle
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4
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Fuel
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Gasoline
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Cylinders
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2 (opposed)
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Cylinder
Material
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Cast Iron
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Gear
Transmission
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3-Speed
Sliding Spur
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Cylinder
Bore
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3¼ inches
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gear, Cast
iron trans
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Stroke
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3 inches
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mission case,
Rolling
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Piston
Displacement
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49.8 Cubic
Inches
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contact
bearings.
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Horsepower
@ 3600 RPM
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19.5
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Differential
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8 pinion,
spur gear, nonadjustable limited slip. Located in transmission case
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Compression
Ratio
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7.0 to 1
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High Speed
(No Load)
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3850 RPM
(Revolutions per Minute) Maximum
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Final Drive
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Individual
spur gears, rolling contact bearings, cast iron case.
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High Speed
(Full Load)
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3600 RPM
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Idle Speed
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1200 RPM
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Valves
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Positive
rotating
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STEERING
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Stellite
facing on valve
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Type
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Recirculating
ball screw,
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heads
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manual
operation
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Valve Tappet
Clearance
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In take
.006-.008
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Steering
wheel revolutions
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3.2 stop to
stop
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Exhaust
.015"-.017 "
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Steering
wheel diameter
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14"
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Valve Seats
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Replaceable,
Stellite
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faced
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SEAT
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Cooling
System
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Pressure air
cooled, axial
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flow blower
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Carburetor
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Zenith -
Horizontal draft, adjustable main jet.
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Standard
lever operated seat
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Adjustable
from operator position 4 inches front to rear. Spring mounted, inclined ramp.
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Fuel Filter
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In fuel line
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Choke
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Manually
operated
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Air Cleaner
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Replaceable
paper element
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Fuel Pump
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Diaphram type
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Governor
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Cam gear
driven, adjustable mechanical flyball, pressure lubricated
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FRONT POWER
TAKE OFF
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Clutch
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12 volt
electric solenoid
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actuated
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Breaker point
gap
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.020 inch
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Speed
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Equal to
engine RPM
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Ignition
Timing
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200 before
top dead
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Drive
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6-1/2 inches
A section
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center
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pulley
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Spark Plug
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Allis-Chalmers
No.2067308
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REAR POWER
TAKE OFF (Optional)
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Spark Plug
Gap
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.025inch
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Clutch
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12 volt
electric solenoid
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Lubrication
System
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Gear type oil
pump,
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actuated
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adjustable
pressure relief
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valve,
replaceable oil filter
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Speed (@ 3600
Engine RPM)
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2000 RPM
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Starting Motor
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12 volt electric solenoid
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Drive
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1 inch internal 15
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shift starter
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tooth involute spline
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Direction of Rotation
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Clutch
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Foot pedal operated, double
V-belt drive, clutched by varying center distance between pulleys
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