Hammering - Popular Questions, Answers, Tips & Manuals

It may be the carbon brushes on the motor. Lots of help in the videos.

Bosch electric jack hammer Brute wire problem? = Answered

https://howtomendit.com > answers I have a bosch electric jack hammer (brute) its not running. I took it apart and the wires that connect armature to the motor I think thats

Carbon Brush Set [1617000425] for Bosch Power Tools

https://www.ereplacementparts.com > carbon-brush-set-... Jackhammer stop working. Remove motor cover. Pull out armature and brush holder out of coil. Replace carbon brushes. Put armature and brush holder back in ... Rating: 5 · ‎1 review · ‎US$27.43 · ‎In stock

Lots of parts inside it. Repair videos https://www.google.com/search?q=bosch+bulldog+11255VSR+stopped+hammering https://www.ereplacementparts.com/bosch-11255vsr-0611255539-sdsplus-bulldog-xtreme-rotary-hammer-parts-c-128_1376_7448.html Better image https://www.aliexpress.com/item/1005002042848411.html?pdp_npi=2%40dis%21CAD%21C%24%203.81%21C%24%203.81%21%21%21%21%21%402101d1b116703544106556022e5b19%2112000018525198068%21btf&_t=pvid:5850845c-953c-45e6-aaa6-39cb556488d5&afTraceInfo=1005002042848411__pc__pcBridgePPC__xxxxxx__1670354410&spm=a2g0o.ppclist.product.mainProduct ..

short in wiring

ROTELLA #40 oil or any 40 weight oil

Unfortunately, Kango has been out of business for many years and there are no parts available anymore. They were a great hammer, its a shame they are gone.

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Question edited for full 'make model (what it is)'. Question moved to a Bosch SDS category. Clutch issues, parts and a video. https://www.google.com/search?q=bosch+rh540m+slipping+clutch+replacement ..

This is an indication that the hammer needs service. When you take the barrel off you will see the striker. There is a piston inside the striker, when the rubber rings on the piston wear out you have the problem you describe. time to replace the motor brushes clean and regressed, make sure to use the correct grease, Check the backlash on ring and pinions. Don't put too much grease on the piston or it will stick and not strike. Good luck I forgot to ask which version. This is for the uk atlas coco, silver with blue or red handle

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https://www.manualslib.com/manual/585142/Makita-Hm1214c.html?page=5#manual

notify bosch or dealer

try asking the place you bought it

https://www.youtube.com/watch?v=JMGwvpDpu9w

Makita A-90582 or (the equivalent)

Hitachi 981840 Hammer Grease

But dont forget to replace all o-rings and seals at the same time some older models have special wear tear parts sets for service also called maintenance spare parts. If the brushes are short then its time for service.

get a multi-meter and test switch and wiring

Likely it needs new o-rings - there is no compression between the piston and hammer

no information generic answer --notify the manufacturer or owners manual for assistance

Unfortunately, you won't find them - Kango was a great hammer, but the company has been gone for many years and there are no parts available. I would find a local repair shop that may have a different brand brush that is the same or bigger dimensions - by using a piece of 220 grit sandpaper on a hard, flat surface - you can sand them down to the proper size. It will get you out of a bind

Contact the manufacturer/distributor to inquire.

If an oil sight glass is in the modelrange of the brand ROK Rottela 40 , but if no sight glass is used in the model then often is to use special Grease lubrication. or only an special volume of oil and most used of them are zinc-free hydraulic based and included in the manual instructions of a maintenance set (service kit)wear parts set.