ARO 637140-D2 Diaphragm Pump Repair Kit, Nitrile
Nitrile diaphragm and nitrile ball repair kit for ARO 66605J-0D2 and 666053-0D2 pumps
ARO 637140-D2 is a repair kit with a nitrile diaphragm and nitrile balls. Our parts data ties it to two pumps, 66605J-0D2 and 666053-0D2.
The ARO 637140-D2 repair kit puts nitrile, also called Buna-N, on the diaphragm as well as the balls.
The diaphragm is the flexing wall that pushes fluid out of each chamber. The balls act as one-way valves on the inlet and outlet. When either wears, the pump loses efficiency, which is why they are usually replaced at the same time. Contents beyond the diaphragm and ball material are not detailed here; your pump manual lists every kit item.
When to Use This Kit
- Nitrile parts have hardened, cracked or swelled after long contact with the fluid.
- Capacity sags and the pump cycles faster to keep up.
- Fluid shows up where only air should be, at the muffler.
Fits These ARO Pumps
Two pumps list 637140-D2:
Both end in 0D2. If yours shows a different ending, it probably needs a different 637140 kit. The kit code and the pump suffix both use D2, which is a quick first check.
| Brand | ARO |
|---|---|
| Product Type | Kit |
| Material - Diaphragm | Nitrile |
| Material - Balls | Nitrile |
