Figure 1
In-Tank
Filter
1.
Release the pressure from the sprayer and remove all liquid from
both the pressure chamber and tank.
2. Remove filter basket and the In-tank filter from the pressure
chamber (fig. 1).
3.
Remove hose (fig. 2).
4. Remove 2 bolts attaching the pivot lever to the pump shaft and
remove diaphragm assembly (fig. 3).
5. Remove the 2 bolts holding back spine/frame (fig. 4), and the back
spine/frame will come off.
6.
Rock the pressure chamber back and forth and push down to free it
from the tank (fig 5). Once freed the entire pump assembly can
be removed.
7)
The pressure chamber o-ring can be replaced. DO NOT stretch
the o-ring over the bottom flange. Assemble the o-ring over the top
of the chamber. Apply petroleum jelly to the o-ring before
reinstalling pump assembly into the tank (fig. 6).
8)
Reassemble in reverse of removal. Note: there is a notch/tab
combination in the pump assembly/tank to be used for
alignment (fig. 7).
Figure 2
Figure 3
Figure 4
Pressure
Chamber
o-ring
Pump
Assembly
Figure 6
Pressure
Cylinder
Notch
Tank Tab
Figure 7
Figure 5
Pressure
Chamber
Filter
Basket
7E
DISASSEMBLING AND REPAIRING THE PUMP ASSEMBLY
Chapin Backpack Sprayer Operator’s Manual - English
