If you need to install a new system, order one Driver Clutch
and one Driven Pulley. Use a 7/8" Top Width Symmetric Belt.

These components are designed to withstand the extreme rigors of rough applications including recreational vehicles such as ATV`s, utility vehicles, golf carts, and the E.T.V (Economy Transportation Vehicle). Materials handling and other commercial uses: oil well pumps, tractors, tillers, mowers, construction equipment, plus industrial equipment, in short, wherever there is a need for a torque sensitive drive system device that is infinitely variable from its low to high range. How does a torque converter work? The drive clutch is activated by centrifugal force from the engine crankshaft. The moveable sheave of the clutch is forced in as the RPM of the engine is increased. This contacts the drive belt. The drive belt will then be forced to a larger diamter within the clutch sheaves, thus pulling it to a smaller diameter within the driven unit sheaves. The moveable sheave of the driven unit is forced out, allowing the belt to seek its smaller, high speed ratio diameter. As this happens, the speed from the engine transferred to the final drive is increased.

40 Series Driven Pulleys have a 7-1/2" outer diameter,
44 Series Driven Pulleys have an 8-1/2" outer diameter

IMPORTANT! The Torque Converter DRIVER CLUTCH MUST NOT FLOAT on the engine crankshaft. It must be bolted tight against the engine crankshaft shoulder. Recommended Torque for bolt - 24 ft. lbs. to 30 ft. lbs. Max.

RECOMMENDED HP - MAX 18 H.P. 4 CYCLE

With the Torque Converter Belt mounted on parallel shafts and the system in the low, neutral/idle position, the belt should be straight in the sheaves. The belt when straight in the sheaves should also be square to the engine crankshaft and jackshaft.

The center line of crankshaft and the jackshaft must be parallel at all times.

By increasing the spring tension of the torque sensing system ... the power ratio of the system (Driver and Driven) can be held longer at higher engine r.p.m.'s before it's overcome by the clutch driver.

To shorten the time required for the driven member to attain it's speed ratio, DECREASE the amount of spring tension of the torque sensing cams. This will allow the r.p.m. of the drive clutch to overcome the power ratio of the driven unit at a faster rate in a lower r.p.m. range.

Inspect the torque converter on a regular basis for dirt, frayed belts and any other potential problem obvious from a visual inspection. Always service units before each season. Maximum service interval recommended is each 50 hours of operation.

Drive and driven pulleys should be parallel. Friction faces must be smooth and free of dirt, corrosion, oil or grease. Belt must be dry, straight, and free of cracks, breaks and uneven wear. Operating the vehicle in a dusty environment will require more frequent servicing.

Indicators of a torque converter system requiring cleaning and lubrication are erratic or jerky engagement upon acceleration and a tendency to apparently "lock" into a particular speed (a second cause of jerky engagement is an excessively loose drive chain). If either one of these conditions exist, service the unit immediately. Both driver and driven pulleys should be disassembled and cleaned.

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