Description
Overview:
The Valve Stem Seal for Perkins 400 Series engines is a genuine Perkins part designed to control oil at the valve guide and prevent oil from entering the combustion chamber. Built to OEM specification U20406140, it offers a precise fit on engines such as the 403D-15T and 404D-22T. The seal uses a durable steel outer shell with a heat‐resistant elastomer sealing lip and a pre‐fitted garter spring to maintain constant contact on the valve stem. This combination helps reduce oil consumption, exhaust smoke, and plug fouling while protecting valve guides. Suitable for plant, agricultural, and industrial equipment powered by Perkins 400 Series engines, it supports reliable running in compact excavators, generators, pumps, and other small diesel machinery.
Key Features:
- Genuine Perkins part for assured compatibility and reliability on 400 Series engines
- OEM reference U20406140 for easy identification during service and ordering
- Steel shell with elastomer sealing lip and garter spring for stable, long‐term sealing
- Helps control oil consumption and reduce blue exhaust smoke
- Resists heat, oil additives, and fuel vapours common in diesel applications
- Consistent sealing at idle and high RPM, aiding engine efficiency and emissions
- Supports smoother cold starts and cleaner combustion by preventing oil ingress
- Simple to fit with standard valve service tools, helping to minimise downtime
- Suitable for both intake and exhaust positions where specified by Perkins
- Backed by Perkins engineering to match original build quality
Typical Applications:
Used during top‐end overhauls, cylinder head rebuilds, or routine maintenance to stop oil leaking past the valve stem. Common on compact plant (e.g. mini excavators), generators, compressors, pumps, and light industrial equipment running Perkins 400 Series diesel engines.
Also known as:
Valve stem oil seal, valve guide oil seal, engine valve seal, stem oil seal, oil control seal for valves.
Fits Models:
103-09, 103-10, 103-15, 10309, 10310, 10315, 104-19, 104-22, 10419, 10422, 403C-11, 403C-15, 403C11, 403C15, 403D-11, 403D-15, 403D-15T, 403D-17, 403D11, 403D15, 403D15T, 403D17, 404C-22, 404C-22T, 404C22, 404C22T, 404D-15, 404D-22, 404D-22T, 404D15, 404D22, 404D22T, 8014, 8015, 8016, 8017, 8018
Alternate Part Numbers:
SBA120406050, 120406070, 120406050, 440-5104, 02630142, 153-5554, 1535554, 4405104, 475549
Product Specifications
| L&S Part No. | U20406140 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Perkins |
| Unit of Sale | 1 |
| Applications | 103-09, 103-10, 103-15, 10309, 10310, 10315, 104-19, 104-22, 10419, 10422, 403C-11, 403C-15, 403C11, 403C15, 403D-11, 403D-15, 403D-15T, 403D-17, 403D11, 403D15, 403D15T, 403D17, 404C-22, 404C-22T, 404C22, 404C22T, 404D-15, 404D-22, 404D-22T, 404D15, 404D22, 404D22T, 8014, 8015, 8016, 8017, 8018 |
| Machine Type | Excavators |
| Fits Brands | Perkins |
| Fits Models | 8014 | 8015 | 8016 | 8018 |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£78.14 £65.12 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£79.52 £66.27
Related Products
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£78.14 £65.12 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£79.52 £66.27
