Milton Roy Dosing Pump GB80 (PP)

Separate the following components

Remove and discard the three gaskets (419)

Were all parts cleaned for reuse?

List any chemicals used for cleaning and confirm compatibility with process liquid

Ensure the correct end of the check valve assembly is screwed into the liquid end

Trap a new O-Ring between the liquid end and the check valve assembly

Refer to Figure 10 for proper assembly order

Screw the coupling (445) onto the check valve assembly

Trap a new O-ring between the coupling and the check valve assembly

Were new O-Rings used for the reassembly?

Describe any issues encountered during reassembly

Unscrew the ball guide (424) from the liquid end

Remove and discard the O-Rings (419)

Carefully clean any parts to be reused

Is the check valve suspected to be damaged or worn?

Replace the entire check valve assembly if damaged or worn

Refer to Figure 9 or 11 before starting disassembly

Separate the union end (445) from the other liquid end parts

Unscrew the ball guide (424) from the liquid end

Screw the union nut part way onto the end of the ball guide

Ensure the union nut is on loosely to allow a gap for the seat (420)

Place the ball guide/union nut onto a flat surface with the union nut down

Fit new O-Rings into position on the ball guide and seat

Drop the ball into the curved inner chamber end of the ball guide

Sit the ball guide on a flat surface with the ball facing upwards

Position seat on the ball guide, trapping the ball inside

Press the seat into the ball guide with firm, even pressure

Position the union end onto the correct end of the ball guide