Echo MS-53BPE Use and care manual - page 9

8E

Pressure Chamber Housing Gasket and Felt Washer

Slide both the gasket and felt washer off the pressure chamber body (Figure 6). 

Replace felt washer first taking care not to fold over washer as it is worked up 

the pump chamber and into the pump locking ring (figure 7). The felt washer is 

pre-lubricated to provide lubrication between the pressure chamber housing and 

pressure chamber housing gasket.  Insure the felt washer is free of contamination 

before installing.  Replace gasket into the pump opening in the tank insuring 

the flanged end is up (if this is assembled backwards leakage will occur) (Figure 

8). Insure that the sides of the gasket are inside the tank pump opening and the 

flange is sitting level on the tank pump opening seal surface area.  

5) Replace pump assembly into tank and into the piston cylinder which is mount-

ed on the bottom of the tank. Be careful not to damage the plunger seal as it seats 

into the piston cylinder. It is recommended that you  view through the tank fill 

opening while performing this to achieve better alignment.  If necessary you can 

also reach in and use your hand to guide the plunger seal into the piston cylinder.  

6) Position the pump outlet (hose connection) in the desired position. Tighten 

the pump retaining ring onto the tank. 

7) Reach into tank fill opening and attach agitator to pressure chamber body.

8) Connect linkage arm to the top of the pump assembly (see section covering 

Installing The Pump Handle).

PUMP DISASSEMBLY AND REBUILD

1) Insure the tank and pressure chamber contents are emptied and pressure 

has been released in the pressure chamber.  To release pressure in the pressure 

chamber activate shut-off valve and release all pressure.

2) Reach into tank fill opening and remove agitator bar from pressure chamber 

body (Figure 1).

3) Disconnect linkage arm from the top of the pump assembly (see section 

covering Installing The Pump Handle). (Figure2).

4) Loosen pump locking ring and remove entire pump assembly from 

tank ( Figure 3). 

Boot

Retainer 

Nut

Ball

Figure 1

Agitator 

Bar

Figure 2

Figure 3

Pressure

Chamber

Pump

Locking

Ring

Figure 8

Figure 7

Figure 6

Felt

Washer

Gasket

Pump 

Locking 

Ring

Felt

Washer

Pressure Chamber

Housing Gasket