Chapin MIXES 63950 Manual De Uso Y Cuidado página 9

DISASSEMBLING AND REPAIRING THE PISTON PUMP
C
B
A
Figure 1
Figure 2
Retaining
nut
Figure 3
Figure 4
Figure 5
Collar
Figure 6
1) Depending on your model, remove the cotter pin or bolts that hold the
pump handle to the pump shaft.
2) With the pump facing towards you lay the sprayer on its back (Fig. 1).
Loosen the hose clamp and remove the sprayer hose. Caution: there could
be residual liquid in the hose and pressure cylinder. Remove the nut and
bolt from the protective cap using an allen wrench. Once the bolt has been
removed, remove the cover. Rotate the pump shaft in order to reach the
lever bolts (A) that connect the piston assembly (B) to the pump shaft.
Using an allen wrench, remove the lever bolts. Pull the piston out of the
piston cylinder (C).
3) Remove the 2 bolts that hold the frame assembly to the sprayer
tank (Fig.2). Use a socket wrench on both the bolt and nut to
loosen (Fig.2). Once these bolts are removed, the frame assembly
should separate from the tank.
4) With a pair of pliers, reach into the pump cylinder to loosen
the black plastic retaining nut (Fig.3) to remove the detach the hose.
5) Remove the piston cylinder assembly by twisting the cylinder counter
clockwise (Fig. 4). This may require a strap wrench or large pair of pliers.
Careful not to damage the cylinder if using pliers.
6) Check both the Piston and the inside of the piston cylinder for vertical
stretches. If scratched, replace the piston.
7) To replace the collar, push it off of the crown of the piston with your thumb.
You will see form fitted slots to install the new collar on to the piston crown
(fig. 6).
8E