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TR2/3/3A Brand new fuel pumps
- Thread starter mctriumph
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I agree also. The TR3 fuel pump is very simple old school technology, two valves and a diaphragm; easily rebuildable but a couple of caviats. If the seal for the shaft is bad (it usually is not) it requires the $60 plus kit. In addition, the shaft on the new diaphragm on the last one I bought was a stamped part with very sharp edges. unlike the original. It took a little hand work to smooth enough so as not to cut the new seal.
Tom
Tom
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This "new " pump broke at the point where the diaphragm rod attached to the actuator arm. This stamped steel
arm just broke at .8 miles. The replacement has several mods to make what was bullet proof to trouble prone.
Sucks unless you like pushing more than driving.....
Mad dog
arm just broke at .8 miles. The replacement has several mods to make what was bullet proof to trouble prone.
Sucks unless you like pushing more than driving.....
Mad dog
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I think the actuator in all the kits is stamped also and integral with the diaphragm. Seems to be the Achilles heel.
I'm not sure that seal is actually necessary. It might keep some oil splash out of the pump casting but no oil in the gas or vice versa, as long as the diaphragm is intact. I'm sure someone will correct me if I'm wrong. I've rebuilt several pumps leaving the old seal in place with no ill effects.
That seal does come in the expensive kits, TRF has them and others I suppose.
Tom
I'm not sure that seal is actually necessary. It might keep some oil splash out of the pump casting but no oil in the gas or vice versa, as long as the diaphragm is intact. I'm sure someone will correct me if I'm wrong. I've rebuilt several pumps leaving the old seal in place with no ill effects.
That seal does come in the expensive kits, TRF has them and others I suppose.
Tom
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The aluminum casting in mine had boogered inlet threads… I have kept the original pump, but it requires surgery before use