The Multiquip 11099H8910 Exhaust Valve Insert is a genuine OEM component designed for C30HDNI and C30HDN series Mayco concrete pumps, including the C30HDNI Precision and C30HDNI Zenith variants. As a direct OEM replacement, this insert is manufactured to the exact material and dimensional standards of the original part, ensuring a correct fit within the valve assembly. DHS Equipment supplies this part straight from the Multiquip OEM catalog, so you can order with confidence knowing you are receiving an authentic component backed by the original equipment manufacturer.
Key Features
- Genuine OEM Material Grade — Manufactured to the hardness and heat-tolerance specifications required for exhaust valve service in concrete pump engines, maintaining proper seating and sealing over repeated thermal cycles.
- Direct Drop-In Replacement — Matches the original seat dimensions and press-fit profile of the C30HDNI and C30HDN cylinder head, allowing installation without custom machining or modification to the head.
- Broad C30 Series Coverage — Confirmed fitment across C30HDNI, C30HDN, C30HDNI Precision, and C30HDNI Zenith Mayco concrete pump models.
- Sustained Compression and Sealing — A properly seated exhaust valve insert maintains the combustion chamber seal that allows the engine to develop full power output, keeping the pump delivering consistent pressure on the job.
- Combustion System Safety — A worn or damaged exhaust valve insert can allow combustion gases to escape past the valve seat, leading to power loss, overheating, and potential engine damage; replacing it promptly restores safe, controlled combustion.
An exhaust valve insert is a hardened ring pressed into the cylinder head that provides the seating surface against which the exhaust valve closes after each combustion event. It is designed to withstand the repeated high-temperature impact of the valve face and resist the corrosive effects of hot exhaust gases. When the insert wears, becomes pitted, or loses its seat profile, the exhaust valve can no longer form a proper seal, which causes compression loss, rough running, and accelerated engine wear across the entire top-end assembly.
Part Details
| Part Number | 11099H8910 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Exhaust Valve Insert |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | C30HDNI |
| Mayco Pumps | C30HDN |
| Mayco Pumps | C30HDNI Precision |
| Mayco Pumps | C30HDNI Zenith |
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.
Multiquip