ARO 637429-CC Fluid Section Service Kit, Hytrel
3/8 in. fluid section service kit with a Hytrel diaphragm and balls, U-cup, O-ring and grease
ARO 637429-CC is a Hytrel service kit for a 3/8 in. fluid section, with a diaphragm, ball, U-cup, O-ring and a grease package.
Small pumps need small parts, and ARO 637429-CC is built for a 3/8 in. fluid section. Its diaphragm and check balls are Hytrel, a tough thermoplastic polyester elastomer.
Listed contents are a grease package, U-cup, O-ring, ball and diaphragm. Unlike some larger kits, its notes do not mention a gasket or washer. Inside the pump, the diaphragm moves the liquid and the ball seals the check valve between strokes. Kits this size suit compact pumps, so keep track of the small U-cup and O-ring during disassembly.
When to Use This Kit
- Delivery from the small pump has become weak or erratic.
- The U-cup or O-ring is leaking at the fluid section.
- The diaphragm has ruptured and fluid appears at the exhaust.
Fits These ARO Pumps
Two pumps reference this kit in their parts lists:
One is a PD03P and the other a PE05P, so use the full model code on the nameplate to confirm.
| Brand | ARO |
|---|---|
| Product Type | Kit |
| Material - Diaphragm | Hytrel |
| Material - Balls | Hytrel |
| Notes | Service Kit (3/8" Fluid Section), Includes: Grease Package; U-Cup; O-Ring; Ball; Diaphragm |
