ARO 637401-GG EXP Service Kit, Nitrile
Nitrile diaphragms and Nitrile balls in one EXP kit for GGG-coded ARO PD10A and PD10S pumps
ARO 637401-GG is the Nitrile build of the 637401 EXP kit, with Nitrile diaphragms and balls. It is listed for 11 PD10A and PD10S models.
What sets the ARO 637401-GG apart from other 637401 kits is its elastomer: Nitrile is used for the diaphragms as well as the balls. Every pump in the sample fit list ends in GGG, the Nitrile configuration of the PD10A and PD10S series.
Sticking with the GG code means the rebuilt pump keeps the elastomer its model code calls for. The diaphragms and balls are the parts that wear fastest in an air-operated diaphragm pump, which is why they are grouped in one kit.
Symptoms That Call for This Kit
- Liquid leaks from the muffler or air exhaust port.
- Strokes speed up while discharge flow weakens.
- Nitrile parts look cracked, swollen or hardened at inspection.
If your pump code ends in a different letter pair, it was built with another elastomer and needs the matching 637401 kit instead.
Fits These ARO Pumps
- ARO PD10A-AAP-GGG
- ARO PD10A-BAP-GGG
- ARO PD10A-ACP-GGG
- ARO PD10A-ASS-GGG
- ARO PD10A-AAS-GGG
- ARO PD10A-ASP-GGG
- ARO PD10A-ACS-GGG
- ARO PD10S-ASS-GGG
Three more models are listed beyond those shown above. Read the model code from the pump nameplate and compare it with the parts list to be sure.
| Brand | ARO |
|---|---|
| Product Type | Kit |
| Material - Diaphragm | Nitrile |
| Material - Balls | Nitrile |
