Repair And Assembly; Pump Wet End Removal - Dover PSG ALL-FLO A300 Installation Operation & Maintenance Data

Metal 3 inch air-operated double-diaphragm pump
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7
SECTION

REPAIR AND ASSEMBLY

PUMP WET END REMOVAL

TOOLS NEEDED
1) Two Wrenches, 3/4 Inch
2) Two Adjustable Wrenches or Vice
3) One Socket Wrench, 9/16 Inch
4) One Socket Wrench, 1-1/16 Inch
5) One Spanner Wrench, 3/4 Inch
(May Be Required) - A vice may be
required
STEP 1
Using the 3/4 inch wrench remove
six "Hex-Head Cap Screws (1/2"-
13x2-1/2")", six "Flat & Lock
Washers (1/2")" and six"Flanged
Hex Nuts (1/2"-13)" from the
"Discharge Manifold".
STEP 4
Using the 3/4 inch wrench remove
six "Hex-Head Cap Screws (1/2"-
13x2-1/2")", six "Flat & Lock
Washers (1/2")" and six "Flanged
Hex Nuts (1/2"-13)" from the
"Suction Manifold".
ALF-12090-E-01
WARNING
Prior to servicing the pump, ensure that the air and
fluid lines are closed and disconnected. While wearing personal
protective equipment, flush, drain and process liquid from the pump
in a safe manner.
WARNING
Maintenance must not be performed when a hazardous
atmosphere is present.
STEP 2
Remove the "Discharge Manifold".
STEP 5
Remove the "Suction Manifold".
14
STEP 3
Remove the "O-Ring", "Valve Seat"
and "Ball".
Note: some models have an
integral rubber seat and seal.
STEP 6
Remove the "O-Ring", "Valve
Seat" and "Ball".
Note: some models have an
integral rubber seat and seal.
All-Flo

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