The Multiquip EM503073 Rocker Arm Shaft is a genuine OEM component designed for the C30HDG concrete pump. Sourced directly from Multiquip, this part meets the exact specifications required for proper valve train operation on C30HDG equipment. If you're tracking down a hard-to-find internal engine component for your Mayco concrete pump, the EM503073 is the correct OEM part to restore full function.
Key Features
- Genuine OEM Metallurgy: — Manufactured to the same hardness and dimensional tolerances as the original shaft, ensuring correct load-bearing performance within the valve train assembly.
- Drop-In Fitment for C30HDG: — Engineered specifically for the C30HDG concrete pump; installs in the original rocker arm carrier positions without machining or modification.
- Valve Train Integrity: — A correctly sized rocker arm shaft maintains proper rocker arm alignment and pivot geometry, ensuring consistent valve actuation and engine timing.
- Wear Resistance: — Built to handle the repetitive high-cycle loads of a working engine, resisting surface wear that causes rocker arm slop and loss of valve lift.
- Verified Multiquip Part Number: — EM503073 is the confirmed OEM reference for this shaft on C30HDG units, removing guesswork from your parts order.
The rocker arm shaft is a precision engine component that serves as the pivot point for the rocker arms, which open and close the engine's intake and exhaust valves. As the camshaft rotates, the rocker arms rock on this shaft to translate camshaft motion into valve movement — a process that repeats thousands of times per minute under load. When the shaft wears, develops surface scoring, or loses its correct diameter, rocker arm side-play increases, valve timing becomes erratic, and the engine loses power, develops a noticeable ticking noise, or fails to run cleanly — conditions that directly compromise pump output and reliability on the job.
Part Details
| Part Number | EM503073 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Rocker Arm Shaft |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | C30HDG |
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.
