Jiffy-Tap

Spindle Over-Travel:

If the spindle should over travel on its forward stroke, chances are that the tap would simply stall in the work piece, especially on taper pipe threads, provided the relief valve on the hydraulic power supply has been set properly. If the relief valve has been set too high, the tap (especially a small tap) may break, or the spindle may cause the two 6-32 mounting screws on the forward limit switch to break off. After the cause of the malfunction has been corrected, these mounting screws can be replaced. If the spindle should continue to advance, the internal spline will disengage before serious damage is done to the lead screw nut. This disengagement occurs at about 2-1/2" extension of the spindle.

If spindle should over travel on its return stroke, the lead screw nut, may be pushed out of its press fit in the housing. After the malfunction has been corrected, the nut can be pressed back into its housing and secured with two screws in a new place.

If the spindle should lock up in its retracted position and will not start forward, the rear limit switch adjustment may be incorrect, letting the spindle bottom against the hydraulic motor shaft. To release the jam, use a strap wrench to screw the spindle out one turn. Set the limit switch actuating screw 1/16" toward the rear switch, then lock it. If spindle cannot be turned with a strap wrench, remove the three front screws that attach the lead screw nut to the tap housing. Rotate the housing of the nut clock-wise one turn. Reattach housing nut with wiper assembly in the top position.