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 Connector
Model Number: 42-86-0077
The Milwaukee 42-86-0077 is a genuine OEM Water Hose Connector for the MXF301 MX FUEL Handheld Core Drill. The MXF301 has an integrated onboard water-feed system for wet coring: water enters through a quick connect, runs 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 silica dust. The water hose connector is a fitting in that path, joining the water hose into the water-feed route so water is carried under pressure without leaks. Because it carries water under pressure at a joint in the system, a cracked, worn, or leaking connector drips, loses pressure, or fails to deliver water to the bit, which shortens bit life and defeats the cooling and dust suppression wet coring provides. Fitting the genuine Milwaukee OEM connector restores a leak-free water path with the correct fit, where an off-spec part may not seal or connect correctly.
This water hose connector is identified as the Water Hose Connector, Figure 97, on the Milwaukee service parts list for the MXF301 MX FUEL Handheld Core Drill, starting serial K28A, on the current revised bulletin 54-16-9000R (March 2025) and the earlier bulletin 54-00-0301. It works with the surrounding water-feed parts, the water hose assembly (45-80-0315), the water valve body (45-80-0316), the quick hose connector (42-90-0012), and the o-ring (34-40-0166), which are separate items; replace the connector along with the hose or valve if more of the water path is damaged. 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 connector
- For the MXF301 MX FUEL Handheld Core Drill
- A fitting in the drill's onboard wet-coring water path
- Joins the water hose into the water-feed route
- Carries water under pressure at a joint in the system
- Figure 97 on the service parts diagram (bulletins 54-16-9000R and 54-00-0301)
- Part of the water feed that cools the bit and suppresses silica dust
- Works with the water hose assembly (45-80-0315) and water valve body (45-80-0316)
- Restores a leak-free water path with the correct fit
- Replace if the connector is cracked, worn, or leaking
- Sold individually
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 42-86-0077
- Official Description: Water Hose Connector
- Component Type: Core drill water-feed hose connector
- 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 97 (bulletins 54-16-9000R and 54-00-0301)
- Quantity: Sold individually (1 connector)
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Water Hose Connector
The water hose assembly (45-80-0315), the water valve body (45-80-0316), the quick hose connector (42-90-0012), and the o-ring (34-40-0166) are NOT included and are sold separately. Always verify by serial number using Milwaukee's online parts lookup before ordering.
