ARO 637140-34 1/2" Diaphragm Pump Repair Kit
1/2" AODP kit: PTFE/Santoprene diaphragms, Viton balls. Fits ARO 66605J-334 and 666053-334.
Repair kit for the 1/2" fluid section of ARO 66605J-334 and 666053-334 pumps, pairing PTFE/Santoprene diaphragms with Viton balls.
This ARO 637140-34 kit is sized for a 1/2" air-operated double diaphragm pump (AODP) fluid section. It combines two material choices: diaphragms listed as PTFE/Santoprene and check balls made of Viton.
The notes describe the contents as an O-ring, diaphragm, ball and grease packaging. Mixed-material kits like this one let the diaphragm and the balls be chosen for different jobs, so match the suffix on your pump rather than picking by diaphragm type alone. Fresh grease from the included packet helps reassembly go smoothly, and the technical data sheet shows how the fluid section goes back together.
Why Pumps Need This Kit
- Liquid escapes with the exhaust air after a diaphragm tears.
- Viton balls that have hardened or flattened stop seating and flow falls off.
- The pump will not self-prime the way it did when new.
Fits 1/2" ARO Pumps
Both models end in -334; compare that with your nameplate before ordering.
| Brand | ARO |
|---|---|
| Product Type | Kit |
| Material - Diaphragm | PTFE/Santoprene |
| Material - Balls | Viton |
| Notes | Repair Kit (1/2" AODP Fluid Section), Includes: O-Ring; Diaphragm; Ball; Grease Packaging |
