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Machinc
Machinc, General Contractor
Category: Home Improvement
Satisfied Customers: 815
Experience:  Has written home improvement articles since 2008. Earned South Carolina Residential Builders License in 1991.
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Bosch 11247 hammer drill doesn't hammer

Customer Question

Bosch 11247 hammer drill doesn't hammer
Submitted: 1 year ago.
Category: Home Improvement
Expert:  Machinc replied 1 year ago.

This is often a problem with worn "O" rings on the piston and hammer drive. Bosch makes repair kits or you can match the "O" rings using a generic kit.

Expert:  Machinc replied 1 year ago.

When taking the tool apart check for any broken parts.

Bosh uses a special grease ( O ring lubricant) that they reccomend . If you are not comfortable taking your tool apart you can usually find local repair services that repair Bosch and also other brands.

Expert:  Machinc replied 1 year ago.

This link has a good diagram and parts list.

I will be glad to answer any questions you may have.

Expert:  Machinc replied 1 year ago.

Note: O ring lubricant is a silicone base lubricant and is not the sane as gear lubricant.

Expert:  Machinc replied 1 year ago.

Bosch manufactures both.