8E
Figure 2
Figure 3
Figure 5
O-rings
O-ring
Figure 6
Pressure
Cylinder Base
Figure 7
Figure 8
Diaphragm Pump
Alignment Mark
Pressure Cylinder Base
Alignment Mark
Diaphragm
Cover Slot
Figure 1
1)
Unscrew diaphragm pump from pressure cylinder base.
The use of a strap wrench or other mechanical means may
be neccesary (fig. 1).
2)
Remove cotter pin from diaphragm pump assembly pivot
lever connection. Remove pivot lever and connection
hardware from diaphragm pump assembly (fig. 2 and 3).
3) Discard Diaphragm Pump Assembly.
4) Attach pivot lever and connection hardware to new
diaphragm pump assembly. Make sure orientation is
correct with slot in diaphragm cover ( fig. 4).
5) Apply Petroleum jelly to 2 diaphragm pump o-rings (fig. 5).
Screw diaphragm pump assembly into pressure chamber
base (fig. 6), making sure the o-ring seats inside the pressure
chamber base so that the o-ring does not show anymore (fig. 7)
6)
Align the diaphragm pump alignment mark with the pressure
cylinder base alignment mark (fig.8). The slot in the diaphragm
cover will also be in alignment.
DISASSEMBLING AND REPLACING THE DIAPHRAGM PUMP
Pivot Lever Connection
Figure 4
Diaphragm
Cover Slot
Chapin Backpack Sprayer Operator’s Manual - English
