The Multiquip 511837 Front Cover Lock Bolt is a genuine OEM fastener designed for MQ600 series trash pumps, including the MQ600TD80-TLRB, MQ600TD80-TLRP, MQ600H, MQ600HTB, and MQ600HTP. As a direct OEM replacement, this bolt is manufactured to the exact specifications required by Multiquip, ensuring a correct, secure fit every time. Sourced directly through authorized Multiquip distribution, the 511837 is the part your pump was built with — not an approximation of it. If you're servicing or rebuilding the front cover assembly on any of these MQ600 pump models, this is the correct component to have on hand.
Key Features
- Genuine OEM Fastener Grade — Manufactured to the exact torque and thread specification used in original Multiquip pump assembly, so the front cover seats and seals correctly.
- Direct Drop-In Replacement — Threads directly into the front cover mounting position without reworking or adapting the housing.
- Broad MQ600 Series Coverage — Confirmed fitment across MQ600TD80-TLRB, MQ600TD80-TLRP, MQ600H, MQ600HTB, and MQ600HTP trash pump models.
- Maintains Front Cover Integrity — A loose or damaged lock bolt allows the front cover to shift under pump load, leading to misalignment, seal failure, and potential impeller damage.
- Pressure-Side Safety Compliance — On high-volume trash pumps, a properly torqued front cover bolt is critical to containing discharge pressure and preventing casing separation during operation.
The front cover lock bolt secures the front casing panel of the pump volute, holding the cover tightly against the pump body to maintain the sealed wet end. On trash pumps like the MQ600 series, the front cover provides direct access to the impeller for clearing debris and performing routine inspections — meaning this bolt is removed and reinstalled regularly throughout the machine's service life. A worn, stripped, or missing lock bolt compromises the casing seal, allowing water to bypass the impeller and reducing pump output pressure and flow. Replacing it with the correct OEM part, Multiquip 511837, restores the mechanical integrity of the front cover assembly and keeps the pump operating at full capacity.
Part Details
| Part Number | 511837 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Front Cover Lock Bolt |
Compatibility & Fitment
| Name | Model |
|---|---|
| Trash Pumps | MQ600TD80-TLRB |
| Trash Pumps | MQ600TD80-TLRP |
| Trash Pumps | MQ600H |
| Trash Pumps | MQ600HTB |
| Trash Pumps | MQ600HTP |
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.
