The Multiquip 01221803 is a genuine OEM Oil Relief Valve 2G40 RW-1404 designed for Multiquip RAMMAX walk-behind rollers including the RW1404, RW1404MR, and RW1504HF series. As a direct OEM replacement, this valve is sourced to the same specification as the original component installed at the factory, ensuring proper hydraulic pressure regulation within the roller's drive system. Confirmed fitment includes RW1404MR units at S/N 326075 and up, as well as RW1504HF units up to S/N. Keep part number 01221803 on hand for planned service intervals or unscheduled hydraulic repairs.
Key Features
- Genuine OEM Pressure Specification — Manufactured to the exact pressure relief rating required by the RW1404 and RW1504 hydraulic circuits, ensuring consistent valve actuation every time.
- Drop-In Installation — Matches the original port threading, body dimensions, and seat geometry so the valve seats correctly without machining or adapting existing fittings.
- Confirmed RAMMAX Roller Fitment — Verified for RW1404, RW1404MR (S/N 326075 and up), and RW1504HF (up to S/N 1534188) walk-behind rollers.
- Protects Hydraulic System Integrity — A functioning oil relief valve limits peak circuit pressure, preventing seal failure, pump damage, and component overload during compaction passes.
- Critical Hydraulic Safety Component — Proper relief valve operation keeps system pressure within safe operating limits; a stuck-open or stuck-closed valve can cause loss of drive control or catastrophic pump failure.
An oil relief valve is a pressure-control component within a hydraulic circuit that opens at a preset threshold to divert excess fluid back to the reservoir, preventing pressure spikes from damaging pumps, motors, seals, and hoses. On RAMMAX walk-behind rollers like the RW1404 and RW1504 series, the hydraulic system governs drum drive and, where applicable, vibration — making correct relief valve function essential to smooth, controlled operation on the compaction pass. When this valve sticks closed, pressure builds unchecked and can destroy downstream components; when it sticks open, the circuit loses the pressure needed to drive the drum effectively.
DHS Equipment is an authorized Multiquip parts dealer. For fitment questions or help confirming compatibility with your serial number range, contact our parts team directly.
Part Details
| Part Number | 01221803 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Oil Relief Valve 2G40 RW-1404 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rollers | RW1404MR S/N 326075 and up |
| Rollers | RW1504HF up to S/N 1534188 |
| Rollers | RW1404 |
| Rollers | RW1404MR |
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.
