The Honda 78139-YD4-003 is a genuine OEM Hose Band designed for the WT40 water pump. As a direct Honda OEM part, it is manufactured to the exact dimensions required to deliver a secure, leak-free hose connection on the WT40. Verify part number 78139-YD4-003 against your unit's serial number and parts diagram before ordering to confirm this is the correct band for your specific pump configuration.
Key Features
- Genuine Honda OEM Part — sourced directly from Honda, this Hose Band meets the exact clamping specification required for the WT40's hose connections, with no guesswork on fit or dimension.
- Secure Hose Retention — a properly functioning hose band holds suction and discharge hoses firmly in place, preventing slippage under pump pressure that can cause leaks and loss of prime.
- WT40 Water Pump Fitment — built specifically for the WT40; confirm your serial number against the fitment table to ensure this is the correct band for your production run.
A hose band is a clamping fastener that secures flexible hoses to the inlet and outlet ports of a water pump. On the WT40, maintaining a tight, sealed connection at these points is essential — any looseness allows air to enter the suction side, breaking prime and stopping flow, or allows pressurized water to escape the discharge side under load. When a hose band loses tension, deforms, or fails, the hose can work loose during operation, causing immediate loss of pumping performance. Replacing a worn or damaged band with the correct OEM part restores the clamping integrity the pump depends on.
Part Details
| Part Number | 78139-YD4-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Hose Band |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WT40 | 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.
