Bosch 11224VSR hammerdrill

[RobVG]

Our hammer drill started leaking oil out motor housing. The guys ran it and it got hot and also lost some of it's power.

I was wondering what the likely cause is and what parts it might take to fix it?

Thanks

Rob

[UtahAV]

Hi Rob,

I'll start with the leaking oil issue. The tool is lubricated with a heavy grease. When the tool is worked too hard and overheats the grease breaks down into an oil. Since the tool wasn't designed to be lubricated by oil there are no seals to keep oil in. To make the repair you will need to open up the gearbox, clean out the old grease and replace with new grease. The grease is part #1615430001. You will need about one and a half tubes.

The loss of power could be caused by a couple of things. Sometimes the variable speed switches like your rotary hammer uses will fail. The upper end of the switch will go bad which limits the top speed of the tool. The switch is part #1617200066 The other cause would be a bad armature. Inspect the armature for melted insulation or damage to the bars on the commutator. A bad armature will many times have a distinct bad odor. You will want to check the field for any damage as well. The armature is part #1614010112 and the field is part #1614220105.

Good luck with your repair!

-UtahAV
-Mark

[RobVG]

Awesome!

Thank you Mark