The Honda Q14-036L Gear Box Case is a genuine OEM replacement built for WDP20 and WDP30 diaphragm water pumps. Sourced directly from Honda, this component matches the original in every dimension, ensuring a correct drop-in fit with no rework required. Verify your pump's serial number against the fitment table before ordering — Honda supersedes parts at production breaks, and confirming the match protects your repair.
Key Features
- Genuine OEM Construction — manufactured to Honda's original specification, so the gear box case fits and functions exactly as the unit it replaces, preserving the integrity of the pump's drive assembly.
- Direct OEM Replacement — this case is the same part Honda installs at the factory, meaning it installs without modification on WDP20 and WDP30 diaphragm water pumps.
- Diaphragm Pump Compatibility — designed specifically for WDP20 and WDP30 pumps; confirm your serial number against the fitment table to ensure the correct part number Q14-036L is the right variant for your machine.
- Drive Integrity — a cracked or worn gear box case allows misalignment in the crank-and-connecting-rod assembly that drives the diaphragm, leading to uneven pumping action or complete loss of flow.
In a diaphragm water pump such as the WDP20 and WDP30, the gear box case houses the mechanical drive assembly — the crank and connecting rod — that converts engine rotation into the reciprocating motion needed to flex the diaphragm and move water. It keeps the internal drive components in precise alignment and contains the lubricant that keeps those moving parts running smoothly. When the case is cracked, broken, or worn, alignment is lost, lubrication escapes, and the pump's ability to deliver consistent flow is compromised. Replacing it with a genuine Honda Gear Box Case restores proper drive geometry and gets the pump back to full working order.
Part Details
| Part Number | Q14-036L |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Gear Box Case |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Diaphragm Water Pump | WDP20, WDP30 | 6000351-9999999 |
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.
