Model Twenty Two questions

The PTO has a disengagement lever centered right in front of the seat in the same spot where the steering clutch lever adjustment access cover is only the lever/cover is a casting and yes it is driven by the master clutch. You disengage by moving the lever left or right but be sure not to engage while the master clutch is engaged or when the implement is spinning because there is only a straight cut jaw coupling. On a belt pulley attachment there is a lever on the right angle bevel gear that moves the two miter gears apart to disengage. On tractors equipped with a PTO there is also a cast iron pawl that can be locked to hold the clutch pedal disengaged. It is the same as the pawl that locks one of the steering brake pedals for parking.

Twenty Twos were built as both dual-fuel and gas-only tractors, depending on when they were built. 2F1 to 1J916 were dual fuel tractors as normally equipped from the factory. 1J917 to 1J5157 came from the factory as gas-only tractors. That does not mean that someone has changed parts around in the tractor's 80-year life. Cat also offered changeover groups to change one fuel type to the other. Group 2B7242 was to change a dual-fuel tractor to a gas burner, and group 4B3027 was to change a gas burner to a dual-fuel tractor. The fuel-burning tractors did have a radiator curtain.
Thanks
Ken

Ken, our 1J3796W has an auxiliary tank in the main tank. Did the gas-only tractors still have that type of tank despite running only gas? The dash has a heat control but no evidence there was ever a fuel change-over valve

Missing the mag switch and gauges have been replaced. I am wondering if the dual fuel lever was present. It has the duel filler fuel tank, but no evidence of ever having the radiator “shade”.

The fuel tank from tractor # 2F1351 to the end of production was the same, part# 2B5421, so all of the gas burner tractors had dual-compartment tanks. Both fuel tanks on all tractors were plumbed to the carburetor but the dual-fuel tractors used a different set of fuel lines than the gas tractors. The dual-fuel tractors did have a fuel valve that was controlled from the dash. I learned something new today by looking at the part books. On the gas tractors, the place where the fuel valve control was for the dual-fuel tractors was repurposed for the heat valve control. There is a plate that would bolt over the fuel valve positions that have the heat valve positions on it. There are several parts books on eBay right now that show all of these parts and on which tractors they are used on.

The 2 models also had different  manifolds. The small tank on the gas models was used as auxillary tank with a shut off directly at the outlet. As previously stated the lines were run differently.