The Multiquip 8944383051 Tappet Valve DCA-45USJ 4JG1 is a genuine OEM component designed for the DCA-45USJ ultra-silent diesel generator. Sourced directly through Multiquip's authorized parts program, this tappet valve is manufactured to the same specification as the original part installed at the factory. It is a direct-fit replacement for the Isuzu 4JG1 engine found in the DCA-45USJ, ensuring correct valve train geometry and proper seating without the need for adaptation. If you are servicing a DCA-45USJ unit, part number 8944383051 is the correct OEM valve tappet for this engine application.
Key Features
- OEM-Grade Valve Train Tolerancing — Manufactured to the exact hardness and dimensional profile required by the Isuzu 4JG1 engine, ensuring consistent contact with the camshaft lobe and valve stem.
- Direct-Fit for DCA-45USJ — Engineered specifically for the Isuzu 4JG1 engine in the DCA-45USJ, dropping in at the correct bore diameter with no clearance adjustment surprises.
- Confirmed Fitment: DCA-45USJ — Verified for the Multiquip DCA-45USJ ultra-silent generator series powered by the Isuzu 4JG1 engine.
- Protects Valve Timing Accuracy — A worn or out-of-spec tappet causes erratic valve lift and timing drift, leading to rough running, power loss, or increased exhaust emissions on your generator set.
- Genuine Multiquip OEM Part — Supplied as an authentic replacement under part number 8944383051, so you can be confident the part matches the original specification for this engine family.
A tappet valve — also called a bucket tappet or valve lifter — sits between the camshaft and the valve stem inside the engine's cylinder head, transferring the rotational motion of the camshaft into the linear motion that opens and closes each intake and exhaust valve. In the Isuzu 4JG1 engine, maintaining the correct tappet clearance is essential for proper combustion timing, fuel efficiency, and clean exhaust output. When a tappet wears unevenly or loses its correct profile, valve timing becomes inconsistent, which can produce rough idling, reduced power output, excessive valve noise, or accelerated wear on surrounding valve train components.
For fitment questions or help confirming that this part is the right part for your DCA-45USJ, contact the DHS Equipment parts team directly.
Part Details
| Part Number | 8944383051 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Tappet Valve DCA-45USJ 4JG1 |
Compatibility & Fitment
| Name | Model |
|---|---|
| DCA-45USJ | DCA-45USJ |
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.
