Product Description
**Milwaukee parts change not only by model# but also by serial number. Milwaukee's site lets you look up your tool's parts diagram. Enter Cat# and Select Service Parts. Also match Serial Number.
Milwaukee Water Hose Assembly
Model Number: 45-80-0315
The Milwaukee 45-80-0315 is a genuine OEM Water Hose Assembly for the MXF301 MX FUEL Handheld Core Drill. The MXF301 uses an integrated onboard water-feed system for wet coring: water enters through a quick connect, passes through the water valve, and is routed through the center of the spindle to the diamond core bit to clear slurry, cool the diamond segments, and suppress airborne silica dust. This water hose assembly is the hose that carries the water along that path inside the tool, supplied with the two hose clamp rings that secure it at its connections. Because it runs water under pressure and flexes with use, a cracked, split, or leaking hose can drip, lose flow, or fail to deliver water to the bit, which shortens bit life and defeats the dust-suppression and cooling the wet-coring system provides. Fitting the genuine Milwaukee OEM water hose assembly restores a leak-free water path with the correct routing and fittings, where an off-spec hose may not seal or connect correctly.
This water hose assembly is identified as the Water Hose Kit, Figure 162, on the Milwaukee service parts list for the MXF301 MX FUEL Handheld Core Drill, starting serial K28A, on both the earlier bulletin (54-00-0301) and the current revised bulletin (54-16-9000R, March 2025). As a kit it includes the water hose and the two hose clamp rings that clamp it to its fittings. Note how the water feed is serviced: the earlier bulletin combined the hose and valve as one Water Hose/Valve Assembly, while the revised diagram separates them, pairing this water hose (45-80-0315) with a standalone Water Valve Body (45-80-0316, Figure 95), so order the hose, the valve body, or both depending on what has failed. It works with the surrounding water-feed parts, the quick hose connector (42-90-0012), the water hose connector (42-86-0077), and the o-ring (34-40-0166), which are separate items. Because Milwaukee specifies service parts by serial number as well as catalog number, verify your catalog and serial number against the official Milwaukee service parts diagram before ordering, since running production changes can alter part compatibility within the same catalog number.
Features
- Genuine Milwaukee OEM water hose assembly
- For the MXF301 MX FUEL Handheld Core Drill
- Carries water along the tool's onboard wet-coring water path
- Includes the water hose and two hose clamp rings
- Part of the integrated water feed that cools the bit and suppresses silica dust
- Figure 162 on the service parts diagram (bulletins 54-00-0301 and 54-16-9000R)
- Present on both the original and current revised MXF301 bulletins (SER K28A)
- Milwaukee's official description is Water Hose Kit
- Pairs with the standalone Water Valve Body (45-80-0316) on the revised diagram
- Restores a leak-free water path with correct routing and fittings
- Replace if the hose is cracked, split, or leaking
- Works with the quick hose connector and water hose connector, sold separately
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 45-80-0315
- Official Description: Water Hose Kit (also shown as Water Hose/Valve Assembly on the earlier bulletin)
- Component Type: Core drill water-feed hose assembly
- Primary Fitment: Milwaukee MXF301 MX FUEL Handheld Core Drill, SER K28A
- Also Referenced On: Verify additional applications using Milwaukee's online parts lookup
- Parts Diagram Position: Figure 162 (bulletins 54-00-0301 and 54-16-9000R)
- Quantity: Sold individually (1 kit: hose with two clamp rings)
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Water Hose
- (2) Hose Clamp Rings
The Water Valve Body (45-80-0316), quick hose connector (42-90-0012), and water hose connector (42-86-0077) are NOT included and are sold separately. On the current revised bulletin the hose and the valve body are separate parts, so order the one that has failed, or both. Always verify by serial number using Milwaukee's online parts lookup before ordering.
