Piston Cup
L1618 SCDI NITRH SGOLD Piston Cup 440 SS
- Catalogue reference number
- P546348
- Catalogue brand
- Not recorded
Catalogue fields identify reference material. They do not confirm stock, OEM authorization or interchange. Verify the nameplate, original number and edition.

Catalogue model references
These are retained catalogue associations, not confirmed fitment for your equipment. Choose the model you want to review.
Catalogue specification records
| Original field | Recorded value |
|---|---|
| Weight | 708.00 lb (≈ 321.14 kg, converted) |
Catalogue description records
This is the L1618 SCDI NITRH SGOLD piston cup, designation 440 SS, a fluid-end sealing part for L1618-series reciprocating pumps. The piston cup is the flexible sealing element fitted to the piston; it maintains the seal against the cylinder liner bore as the piston reciprocates, so wear here directly affects volumetric efficiency. It is supplied under part number P546348 and fits the L1618 and L1618SC pumps.
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.
- Which pumps does this piston cup fit?
- It is listed to fit the L1618 and L1618SC pumps.
- What does a piston cup do?
- It is the flexible sealing element on the piston that seals against the cylinder liner bore as the piston reciprocates; because it is a primary wear surface, it is a routine fluid-end service item.
- What reference part number does it replace?
- It is an aftermarket replacement carrying part number P546348, supplied to match the original component's form and fit.
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