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1940 Accelerator Pump

Testing your accelerator pump circuit.

  • Fill the pump well with fluid. Mineral spirits work well.
  • Press down on the pump. You should get fluid out of the main discharge (where the drift punch is). No fluid? You have a clogged circuit.
  • While holding down on the discharge check weight (use a brass punch), Push the plunger down. You should feel some resistance. No resistance? Tap on the check ball with a drift punch and hammer. Not too hard.

The main discharge has a check ball, then the check weight. If you don't have a check weight, use a 2nd ball as the weight.

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