The Multiquip M805278 Rear Main Seal STH 55JD is a genuine OEM seal designed for the STH55JD. As a factory-sourced component, it meets the exact material and dimensional specifications required for a proper crankshaft seal installation on STH55JD equipment. DHS Equipment supplies this part direct, so you can be confident you are getting the correct seal for your machine. Verify your model against the STH55JD fitment before ordering to ensure a correct application match.
Key Features
- OEM-Grade Sealing Material — Manufactured to the precise compound hardness and compression profile required to maintain a leak-free crankshaft seal under operating heat and pressure.
- Direct-Fit Installation — Engineered to the exact bore and lip dimensions of the STH55JD rear main housing, seating correctly without machining or adjustment.
- Confirmed STH55JD Fitment — Sourced specifically for the STH55JD, eliminating guesswork when sourcing a rear main seal for this machine.
- Protects Against Oil Loss — A correctly seated rear main seal prevents crankcase oil from migrating past the crankshaft, protecting internal engine components from oil starvation and contamination.
- Genuine Multiquip OEM Part — Supplied under the original Multiquip part number M805278, ensuring traceability and consistency with the original equipment specification.
The rear main seal sits at the back of the engine crankshaft and forms a dynamic barrier that prevents engine oil from escaping the crankcase while allowing the crankshaft to rotate freely. When this seal deteriorates or fails, oil leaks from the rear of the engine, leading to low oil levels, external contamination, and potential damage to the clutch or drivetrain components behind it. Replacing a worn rear main seal promptly keeps the engine properly lubricated and prevents oil from reaching components that cannot tolerate contamination.
Part Details
| Part Number | M805278 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Rear Main Seal STH 55JD |
Compatibility & Fitment
| Name | Model |
|---|---|
| STH55JD | STH55JD |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
