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The Ki-gas systems to aid cold starting was fitted to the TEF20 and many other vintage tractors.
The system consists of a small header tank situated to the rear of the main fuel tank which feeds the Ki-gas pump through a small pipe. Between the pipe and the pump is a small body which holds a one-way valve (spring and ball bearing). There is a similar spring and ball bearing on the outlet side of the pump.
The pump assembly is all stripable. The only part which usually needs replacing in the pump itself is the rop seal.
Another part of the pump to be aware of is the inline filter (held in place by a spring).
Repair kits are available for these pumps from a number of parts supliers, such as…