The Honda M55-NKIS-30 Needle Bearing is a genuine OEM Needle Bearing designed for the WDP30 diaphragm water pump. As an authentic Honda part, it is manufactured to the same standards as the original component installed at the factory, ensuring a direct, correct-fit replacement for this specific pump. Verify your unit's serial number against the fitment table to confirm part number M55-NKIS-30 is the right match for your WDP30.
Key Features
- Genuine OEM Construction — sourced directly from Honda, this bearing meets the original dimensional and load specifications required by the WDP30 diaphragm pump's reciprocating drive mechanism.
- Direct Replacement — engineered to install in place of the original without modification, restoring the pump to its designed operating condition.
- WDP30 Fitment — listed specifically for the WDP30 diaphragm water pump; always cross-reference your serial number with the fitment table before ordering.
- Wear-Critical Component — a worn or failed needle bearing introduces play into the pump's drive assembly, leading to uneven diaphragm stroke, reduced flow, and accelerated wear on surrounding components.
In a diaphragm water pump such as the WDP30, a needle bearing supports the rotating crankshaft or connecting rod pin that drives the reciprocating diaphragm. Unlike a ball bearing, a needle bearing uses long, thin cylindrical rollers to handle radial loads within a compact space, allowing the crank mechanism to convert engine rotation into the back-and-forth motion that moves water through the pump. When this bearing wears, increased play in the drivetrain causes the diaphragm to stroke unevenly, reducing pumping efficiency and placing stress on the diaphragm itself. Replacing a worn bearing promptly keeps the pump operating at its rated output and protects the surrounding drive components from secondary damage.
Part Details
| Part Number | M55-NKIS-30 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Needle Bearing |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Diaphragm Water Pump | WDP30 | All |
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.
