Piston Cup
5259944 Piston Cup 1.75 Inch OD
- Catalogue reference number
- 5259944
- Catalogue brand
- FMC Bean
Catalogue fields identify reference material. They do not confirm stock, OEM authorization or interchange. Verify the nameplate, original number and edition.
Catalogue specification records
| Original field | Recorded value |
|---|---|
| Weight | 0.03 lb (≈ 0.01 kg, converted) |
| Width | 1.75 in / 4.5 cm |
| Height | 1.75 in / 4.5 cm |
| Depth | 1.00 in / 2.5 cm |
Catalogue description records
The 5259944 is a 1.75-inch OD piston cup for reciprocating pumps. As a piston cup, it is the flexible sealing element fitted to the piston in the fluid end, maintaining the seal against the cylinder liner bore as the piston reciprocates; wear here directly affects volumetric efficiency, making it a routine wear part. It is an aftermarket replacement for FMC Bean part 5259944, with a 1.75-inch outer diameter and a depth of about 1.00 in.
A piston cup is the flexible sealing element fitted to the piston in the fluid end. It maintains the seal against the cylinder liner bore as the piston reciprocates, so wear here directly affects volumetric efficiency.
Catalogue question records
Original catalogue questions are retained. Fitment and availability need technical review.
- What does the '1.75 inch OD' in the name mean?
- 1.75 inch OD is the outer diameter of the piston cup; the depth is about 1.00 in.
- What does this piston cup do?
- It is the flexible sealing element on the piston in the fluid end. It maintains the seal against the cylinder liner bore as the piston reciprocates, so wear at the cup directly affects volumetric efficiency.
- What is the cross-reference for this piston cup?
- It is an aftermarket replacement for FMC Bean part 5259944; the brand and part number are listed only for identification and cross-reference, not to claim factory manufacture.
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