ARO 637140-EB Santoprene Diaphragm Pump Repair Kit
Repair kit with Santoprene diaphragm and Santoprene balls, listed for six ARO 66605-series pump models.
ARO 637140-EB repair kit uses Santoprene for both the diaphragm and the check balls. It is listed for six ARO 66605-series diaphragm pump models.
The ARO 637140-EB is an all-Santoprene repair kit. Its spec sheet names Santoprene for the diaphragm and for the balls. Santoprene is a thermoplastic elastomer known for long flex life and good abrasion resistance. With the diaphragm and balls in the same material, a single chemical compatibility check covers every elastomer listed for this kit.
All six pumps in our fit data belong to the 66605 family, including the 1/2 in. polypropylene 66605J-3EB.
When to Use This Kit
- The pump keeps cycling, yet it moves noticeably less fluid than before.
- Product is leaking from the muffler or exhaust port.
- Balls look out of round or no longer seat cleanly, so suction weakens.
Fits These ARO Pumps
Our parts data lists the 637140-EB for these six models:
If your model is not on this list, compare the nameplate model number with the repair kit shown in your pump's parts list.
| Brand | ARO |
|---|---|
| Product Type | Kit |
| Material - Diaphragm | Santoprene |
| Material - Balls | Santoprene |
