DISASSEMBLING AND REPAIRING THE PISTON PUMP
1) Remove the cotter pin and pump handle. With the pump facing
towards you lay the unit on its back (Figure 1). Loosen the hose clamp
and remove the sprayer hose. Caution: There could be residual liquid in
the hose and pressure cylinder. Rotate the pump shaft in order to reach
two lever bolts(A). Using an allen wrench, remove the lever bolts.
2) Remove bolts clamping the the two halves of the piston/
diaphragm pump housing together (Figure 2).
Figure 2
Figure 4
Figure 3
Figure 1
A
8E
3) Pull the pump housing halves apart and inspect piston collar/
diaphragm for wear. Replace as needed (Figure 3).
4) Guide lever through skirt (Figure 4).
Figure 6
6) Re-assemble the two pump halves (fig.3). Re-tighten all pump
housing bolts. Re-assemble hose and lever bolts.
Figure 5
5) Align the “groove” in the skirt with the flat ledge on the
retaining ring. Align flat edge with hose connection.
Flat
Groove
