Propeller Shaft And Universal Joints - Jeep CJ-3A Owner's Manual

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drive assembly (mounted at the rear of the vehicle). The rear units are driven through the shift assembly by a
propeller shaft and two universal joints.
The assembly, mounted at the rear of the vehicle, is designed to drive trailed equipment or operate belt driven
machines. The shaft and pulley speeds conform to SAE standards and are obtained at the maximum torque speed
of the engine.
For information covering the power take-off shaft and pulley speeds, reference is made to Page 67 or Page 68 for
metric conversion.
FRONT UNIT OR SHIFT ASSEMBLY.
This assembly, attached to the rear of the transfer case and operated from the transmission main shaft, provides a
gear shift for control of the power take-off. See Fig. 36.
The shift assembly is lubricated from the transfer case and no attention is required other than the regular
lubrication of the transfer case.
Keep the attaching screws tight at all times. Always disengage the clutch when shifting the gear. When using the
belt drive, do not attempt the shift until the machine being driven has "coasted" to a stop.

PROPELLER SHAFT AND UNIVERSAL JOINTS.

The power take-off propeller shaft is tubular and has two universal joints. The joints are enclosed by housings
and boots, which contain the lubricant. The torque capacity of the propeller shaft is far greater than that
developed by the engine and as there is very little flexing of the joints, this unit will require no attention for the
life of the vehicle under normal use other than an inspection at each regular vehicle inspection, to guard against
loose companion flange attaching screws or leakage of lubricant at the boots. Should the power take-off be used
often for continuous operation, disassemble the joints and repack them with lubricant once each year.
POWER TAKE-OFF SHAFT DRIVE.
The six-splined 1-3/8" (30.2 mm.) power take-off shaft, Fig. 38, provides a power output to operate trailed
equipment. This shaft turns clockwise, when viewed from the rear, at a speed of approximately 536 rpm, which is
the standard speed adopted by most farm tractor manufacturers. For information of the horsepower available,
both drawbar and splined shaft at the engine speed provided by each of the nine governor control positions, see
the charts on Page 67.
Always use four-wheel drive when towing power driven equipment. Selection of the most satisfactory governed
engine speed, as well as transmission and transfer case gear shift positions will depend upon soil conditions and
the power required to pull the trailed equipment; also, when operating agricultural machines upon ground and
machine speed requirements and crop conditions.