Diaphragm Pump Repair Kits

ARO offers a complete line of repair kits to keep your diaphragm pump operating at peak efficiency and maximize its life span.

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Fluid and Air Section Kits

Fluid Section Repair Kits

Authentic ARO® Fluid Section Kits are the only replace

ARO Repair Kit Finderment kits you can count on to restore your ARO equipment to its original performance and quality. They include the following necessary replacement parts to repair the worn fluid section of an ARO air operated diaphragm pump. If check ball seats are damaged, then they will need to be purchased seperately.

Repair Kit Contents:

  • Set of Diaphragms
  • Set of CheckBalls or (Flaps/Cones)
  • Inlet/Outlet Manifold O-Rings
  • Connecting Rod O-Rings & Other Needed O-Rings
  • Key-Lube Grease Packet
  • Operator Manual with Detailed Repair Instructions

A full range of diaphragm and ball check materials are available to meet the needs for every industry and application.

Air Section Repair Kits


EXP Series Air Section Service Kit includes gaskets, ‘O’ rings, ‘U’ cups and the Simul-Shift® valve guaranteeing an ultra-positive, reliable shift signal that avoids stall-out.

PRO Series Air Section Service Kit includes the proper gaskets, ‘O’ rings and ‘U’ cups needed to complete standard maintenance repair.

Fluid Section Kits + Seats

Enhanced Fluid Section Repair Kits with their associated ball check seats can be purchased as an option.  These comprehensive Fluid Section Kits are needed in some applications where ball check seats are worn due to long service life or in applications where abrasive fluids are being pumped.  The offering includes the most common Fluid Kits with a wide range of non-metallic seats.

Order the kits with the same part number nomenclature as the pump where in the case of EXP series the 6, 7 and 8 position respectfully calls out the seat, ball, and diaphragm material.

For example:

EXP Diaphragm Pump: PD10A-BAP-AAA

Fluid Section Repair Kit + Seats: 637401-AAA

Fluid Section Repair Kit + Seats offering include:

*Pump Model*
*Seat Material*
*Ball & Diaphragm Mtrl.*
*Fluid Kit + Seats Part Number*
66630, 66632
Santoprene
Santoprene
637433-EEB
PD30R, PE30R, PM30R, PD30A, PD30S, PE30A, PE30S, PP30A, PM30A, PM30S
Santoprene
Santoprene
637303-AAA
Nitrile
Nitrile
637303-GGG
66625, 66627
Santoprene
Santoprene
637432-EEB
Nitrile
Nitrile
637432-G22
PD20P, PE20P, PD20E, PE20E
PVDF
PTFE
637373-KTT
Polypropylene
PTFE
637373-PTT
Polypropylene
Santoprene
637373-PAA
PD20R, PD20Y, PE20R, PE20Y, PM20R, PD20A, PD20S, PE20A, PE20S, PM20A, PM20S, PP20A
Santoprene
Santoprene
637309-AAA
Nitrile
Nitrile
637309-GGG
6661A, 6661B
Polypropylene
Neoprene
637161-311-C
Polypropylene
Nitrile
637161-322-C
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