Question about Bosch Brute Breaker Hammer 11304

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What is the viscosity of bosch brute gear grease

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Posted on Jan 02, 2017

rowdy45176
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SOURCE: Need to know how to take appart the bosch brute

You can go to Boschtools.com and type in your model number for a breakdown, but repairing this tool is a headache.

Posted on Sep 20, 2009

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SOURCE: How do I drain the gear oil from a Bosch Brute

Brute hammer uses special grease sold as service kit. This kit contains enough grease to lube hammer and replacement bolts that hold springs along the bottom. Check www.toolpartsdirect.com for parts and kit. Remove the lower half (tube) of hammer, also remove three bolts that hold springs and remove assembly from tube. Wash out old grease. Grease will be oil-like only when hammer is very hot, otherwise grease is paste-like. Good luck.

Posted on Jul 08, 2010

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Bosch gbh5 will keep loosing its hammer


It sounds like the gearbox oil is getting low. The GBH5 uses oil in the gearbox, not a grease - the grease is used for assembly only. The correct type is a PG-150 (fully synthetic gear oil). Unable to find it in small quantities, I now use PAG150 oil for automotive a/c systems, it's available in small bottles. As for quantity, no-one seems to know... I just fill to cover the big bottom gears.

Jan 18, 2014 | Bosch Brute Breaker Hammer 11304

1 Answer

Do you have to grease or oil anything on the bosch jack hammer


Grease bosch order nr 1 615 430 001 225 ml for 1 service OR 1 615 430 007 1000 ml for bulk repair.

Mar 16, 2013 | Bosch Brute Breaker Hammer 11304

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@runs hot motor feels slow doesnt hit hard


Bosch brute is made to work all day every day and will continue to do so if it is not over or under powered and properly lubed. If not powered correctly, motor will not turn at full rpm, get very hot and burn brushes to point that auto stop feature will stop motor (brush will push away from armature, or burn switch). The hammer will overheat if too long or wrong gauge of cord is used. Also if run on generator with voltage /cycles incorrect. Under normal use, motor will not get very hot. Another problem with overheating is that the grease will melt out of range to do any proper lubrication. If you are sure that it is getting proper voltage /amps then may need lubrication or bearing work. Remove bearing cover and turn armature by hand. It should be easy to turn. If stiff, suspect bearing/grease. With amp meter connected, check amp draw and compare to rated amps.

Mar 26, 2011 | Bosch Brute Breaker Hammer 11304

1 Answer

How do I drain the gear oil from a Bosch Brute Jack Hammer


Brute hammer uses special grease sold as service kit. This kit contains enough grease to lube hammer and replacement bolts that hold springs along the bottom. Check www.toolpartsdirect.com for parts and kit. Remove the lower half (tube) of hammer, also remove three bolts that hold springs and remove assembly from tube. Wash out old grease. Grease will be oil-like only when hammer is very hot, otherwise grease is paste-like. Good luck.

Jun 22, 2010 | Bosch Brute Breaker Hammer 11304

2 Answers

Hammer action power there but weak


It is hard to understand what you are asking, however I have found that with the SDS drills one does NOT want to crowd them but just let the tool work with light pressure...

Feb 07, 2010 | Bosch SDS-plus BULLDOG Xtreme Rotary...

1 Answer

Need to know how to take appart the bosch brute hammer gear case? Spring shaft removal technique?


You can go to Boschtools.com and type in your model number for a breakdown, but repairing this tool is a headache.

Sep 20, 2009 | Bosch Brute Breaker Hammer 11304

1 Answer

Bosch Breaker Hammer Service Kit Install


The grease in the upper drive area used to be a purple looking grease and the grease in the barrel was a different color and weight. If you ordered the rebuild kit with the O rings and bolts I would use it in the barrel (light film coat on the parts )

May 10, 2009 | Bosch Brute Breaker Hammer 11304

2 Answers

Bosch Brute Breaker


What age is the machine? If it is fairly new it might just need to be run a while for the grease to loosen up. If it is older you will need to make sure it has enough grease. These tools don't need a great deal of grease, but too little will soon be thrown about and disperse too much. Another problem with these is if the inner cylinder, that moves up and down to create the pressure for teh striker, has a hairline crack, it can be quite hard to see when the part is dirty. When running though air will leak out and you will loose hammer action but still have plenty of vibratiion. Another thing to check is to take the piston/cylinder and striker out and hold it facing down. The striker should slide out slow and steady. If it falls out too fast then the cylinder and/or striker is worn. You may be able to rectify this by applying a bit more grease. If it doeesn't fall out at all then there is a build of grease behind the striker causing a vacum holding it all together. You can solve this by pushing the striker in a little way, and leaving it standing for an hour or so with cleaning solvent on top. It should work it's way in and help release it. It may still need to be 'persuaded' out a bit aswell.

Oct 23, 2008 | Bosch 15.0 Amp Brute Breaker Hammer With...

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