The Multiquip 1309A00590 Unloader Valve Assembly MQC180 is a genuine OEM component designed for the MQC-180 concrete pump. Sourced directly from Multiquip, this assembly ensures the hydraulic pressure relief and unloading function operates exactly as engineered for the MQC-180 platform. If your concrete pump is experiencing pressure irregularities, surging, or loss of output, the unloader valve assembly is a primary service point to inspect and replace.
Key Features
- Genuine OEM Construction — Manufactured to Multiquip's exact material and tolerance specifications for the unloader valve circuit, ensuring consistent pressure regulation performance on the MQC-180.
- Direct-Fit Replacement — Engineered as a complete assembly that installs directly into the MQC-180 hydraulic system using the original mounting points and port connections.
- MQC-180 Fitment Confirmed — Specifically engineered for the MQC-180 cycloidal-drive concrete pump; verify your model code before ordering to ensure correct application.
- Restores Proper Pump Output — A functioning unloader valve maintains the correct hydraulic pressure balance that drives steady, controlled concrete delivery; a worn or failed valve causes pressure loss, surging, or complete pump shutdown.
- Fuel System and Hydraulic Safety Compliance — Correct unloader valve function prevents dangerous overpressure conditions within the hydraulic circuit, protecting downstream components and the operator.
The unloader valve assembly regulates hydraulic pressure within the concrete pump's drive circuit by diverting or releasing fluid when system pressure reaches a set threshold. This keeps the pump operating within its designed pressure range and protects the hydraulic system from overpressure damage. When the unloader valve fails or wears, the pump may surge, lose consistent output, or place excessive strain on the hydraulic motor and seals — making timely replacement critical to continued safe operation.
Part Details
| Part Number | 1309A00590 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Unloader Valve Assembly MQC180 |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQC-180 | MQC-180 |
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.
