Bosch SDS-plus BULLDOG Xtreme Rotary Hammer 11255VSR Logo

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peter n Posted on Jan 21, 2015
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I have a bosh rotary hammer drill bulldog extreme hammers and drills half ways and then stops spinnig but continues to hammer. Help

Check gears and looked ok not striped or broken

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Pieter Vleeshouwers

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  • Bosch Master 2,029 Answers
  • Posted on Jun 29, 2016
Pieter Vleeshouwers
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  • If look at brushholder unmount it and make clean look if the brushes are go good to each other most causes on this BOSCH tools is that the brushes 70% are hanging on dirth in the brush holder (brushplate) 16 first problem second true problem are the 2 suppression coils (adapter module 817 ) on the electric field. and also parts pos 19 left right switch contacts for the brushes can sometimes on ofthem be broken.
http://www.powertools-aftersalesservice.com/public/bosch-pt/service?p_auth=3aqey22L&p_p_auth=svtCUe1o&p_p_id=WSRP_bc93764e__6873__4b00__9a29__b331c9759da9&p_p_lifecycle=1&p_p_state=normal&p_p_mode=view&_WSRP_bc93764e__6873__4b00__9a29__b331c9759da9_wsrp-navigationalState=L0JPUy9QVEFTLVBULVNJUy1TaXRlL2VuX1VTLy0vVVNEL1ZpZXdQcm9kdWN0LURpc3BhdGNoO3BnaWQ9YmNkZTdkNTFiZjM0NGE0YTU1ZjYzYTYyOGY0MkRvVWFTdFRIO3NpZD1QYnVpWlFuNGVZcGtyVjZMemRLLW5nWnpLM0FSaDhEanA3b2h6b3RZdmhBZ3hZcFR2eHM9

4 Related Answers

Anonymous

  • 305 Answers
  • Posted on Jul 22, 2009

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,

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Anonymous

  • 1 Answer
  • Posted on Feb 26, 2010

SOURCE: I have an AEG hammer drill that no longer hammers.

service manuals AEG SB2E-1001

Mike

  • 4383 Answers
  • Posted on Sep 18, 2010

SOURCE: How do I insert a

There is a collar that you have to pull back, it is kind of big. Be sure to rotate the bit, as you install it, sometimes tricky to engauge the last tiny 1/2 inch or so. The tool will be retained, but not engauged.

Anonymous

  • 14 Answers
  • Posted on Mar 01, 2011

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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How to replace knob assembly on bosh 1 1/8 rotary hammer drill 11222 evs

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I have a bosch hammer dirill that won't chip nor drill but motor run fine

Hi, have you tried the various positions on the front part of the gearbox behind the 'chuck'?
If so, then Im afraid it must go in for repair. These are not an easy fix and personally I would recommend you ask for a 'quotation' as it could be just something simple to do with the 'Gearbox' selector, but it could also be something a lot more serious within the Gearbox.
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I bought a used Bosch Bulldog hammer drill on the internet some time ago and discovered it's not hammering. It will drill be almost no hammer action. Any suggestions?

There is an o-ring on the striker that will wear down over time, this needs to be changed, of worst case the striker has stuck in the hammer piston. Both these repairs should really be done by a service center as these hammer drills are complicated to repair if you are not familiar with them. Any Bosch service center will be able to help you. Just go to the Bosch website and find a center in your area.
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Runs but doesnt engage rotary or hamer. the machine itself looks in great condition its called bosch buldog extreme.

there is a selector knob on the side that controls the tool functions for drill only/hammer with drill/ and hammer only. make sure it is in the proper setting. If it still doesn't rotate then you have a gear or a broken selector. If no hammer then you have worn o rings or a stuck ram. try the selector first and if still no change please be more specific if no hammer at all, or no rotation even when selector moved.
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My bosch bulldog wont hammer any more, can it be fixed?

sure it can, is it just not hammering or is it making a noise. If not hammering the o rings to replace cost about 15-20.00 plus labor, if it is making a funny noise then you might have a major problem.
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Hammer drill just stopped working. Any ideas?

Hi,
Usually that is a good sign of the switch going bad...

heatman101
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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,
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