Chapin 61575 Manuel D'utilisation Et D'entretien page 8

PUMP DISASSEMBLY AND REBUILD
Boot
Retainer
Nut
Ball
Figure 1
Pressure
Chamber
Pump
Locking
Ring
Figure 2
Pressure
Plunger
Check
Chamber
Cup
Valve
Pump Handle Clip
Figure 3
Flat side
Seal
Ball
Counterbore Side
Figure 4
Felt
Gasket
Washer
Figure 5
Pump
Locking
Ring
Felt
Washer
Figure 6
Pressure Chamber
Housing Gasket
Figure 7
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) Disconnect linkage arm from the top of the pump assembly (see section
covering Installing The Pump Handle). (Figure 1).
3) Loosen pump locking ring and remove entire pump assembly from tank
(Figure 2).
4) Check Valve: Remove check valve cartridge assembly from bottom of
pressure chamber utilizing pump handle clip (clip has flat blade incorporated
into end). Place flat blade into slot in bottom of cartridge and unscrew. Once
cartridge has been removed it can either be replaced as an assembly or rebuilt.
To rebuild disassemble two halves of cartridge and replace seal and/or ball
(Figure 3 and 4). The seal mounts inside the larger of the two halves of the
cartridge. The seal counterbore side mounts into the grooves in the cartridge
halve. Pump performance my be affected if this is not assembled correctly.
5) Plunger Cup: Once the check valve has been removed the plunger cup can
be replaced as the check valve housing holds the plunger cup in place to the
bottom of the pressure chamber body. The bottom of the pressure chamber
body has a groove in it to accept the raised ring on the plunger cup. It is
important to insure that these two surfaces are aligned and mated before
tightening the check valve. Pump performance may be affected if this is not
assembled correctly.
6) Pressure Chamber Housing Gasket and Felt Washer: Slide both the gasket
and felt washer off the pressure chamber body (Figure 5). 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 6). 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
7). 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.
7) Replace pump assembly into tank and into the piston cylinder which is
mounted 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.
8) Position the pump outlet (hose connection) in the desired position. Tighten
the pump retaining ring onto the tank.
9) Connect linkage arm to the top of the pump assembly (see section covering
Installing The Pump Handle).
7E