Echo MS-41BP Use and care manual - page 10

7)  Apply Petroleum jelly  to the inside of the piston cylinder wall 

and on the collar, and reinstall the piston assembly into the piston 

cylinder.

8) Insert the piston at an angle with the leading edge of the 

collar placed over the slot in the piston cylinder. Bolt the piston 

assembly to the pump shaft using the lever bolts.

9) Replace the protective dust cap. Tighten the 

nut and bolt. Reinstall the pump handle. Replace the hose 

and firmly secure the hose clamp in place.

DISASSEMBLING AND REPAIRING THE PUMP ASSEMBLY

Figure 7

Figure 8

Figure 9

Protective 

Dust Cap

9E

Figure 1

Figure 2a

Figure 2b

Figure 3a

Figure 3b

Pressure

Chamber o-ring

Clamp

In-Tank

Filter

1.  Release the pressure from the sprayer and remove all liquid from both the pressure chamber and tank.

2.  Remove hose.

3.  Remove the In-tank filter from the pressure chamber. 

4.  Remove 2 bolts attaching the pivot lever to the pump shaft and remove piston assembly (fig. 2a & 2b).

5.  Remove the large clamp holding the pressure chamber and tank together (fig 1).

6.  Rock the pressure chamber back and forth and push down to free it from the tank (fig 1).

7.  Once freed the entire pump assembly can be removed by maneuvering it through the base frame 

  (fig 3a & 3b). 

Pump

Assembly