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SunPumps 85952 SDS-Q-128SQ major repair kit is for the original SolarJack square head quad. It is a change-over kit from bottom mount pistons to the new top mount pistons.
The kit includes the minor kit plus the motor, cable guard, top mount cam assembly and all screws washers, seals and rebuild instructions.
You will also need to order an SDS pump puller (sold seperately).