SOURCE: looking to add oil to rotary hammer Bosch / Bulldog
the oil seal is broken, remove front cover at the chuck end of the drill, and replace the seal,
SOURCE: hammer action power there but weak
Bosch makes a special grease that is actually a mulit-viscosity oil thats a gel at room temp. At high temp it becomes liquid oil that lubes the gearcase and when the tool has cooled off it reverts back to a gel for containment purposes. If you use any other type of grease on these tools it will appear as if it is losing power, when it is actually being "bogged" down by conventional grease. The proper grease is Bosch part# 1 615 430 001-000. Retail price should be around $20 for a 225ml tube.
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