Hammering - Recent Questions, Troubleshooting & Support

Not in an internal combustion engine that you want to last more than a few minutes!

You need to check armature gear it can be damaged. Connection rod can be broken or you just need new o-rings and grease

A dangerous work wear safety glasses and a
leather apron because there could be metal pieces come off the parts , make first the part the disassembled toolholder hot with a large gas burner and in a bench vise with a hammer Interim anything like WD40 spray. sometimes it could be a long prolonged work if you have inserted an invalid chisel.

We are Cummins diesel generator OEM. Can provide 24KW to 2400KW diesel power generator with Cummins engine. Also provide Cummins engine parts and user manual to clients.
You can find the repair manual by Cummins engine official website or turn to supplier for help. https://www.dieselgeneratortech.com/cummins

181490-7 grease 30g 1 pcs complete be shure there are no cured o-rings or bad gaskets .

188015-8 its the maintenance kit for the service it contains already this 30 grams grease, where come 60 grams advise ? i like also to use some more grease by this heavy kind of hammers. But tools like Hilti with liquid (oil) lubrication and very tight tolerance ball bearings if there is to much (turmopol) oil used it will be damaged, and too little oil also its calculated. I cannot give garantee that 60 grams are advised by a makita service, if you order a maintenace kit ask the seller about why it only contains 30grams. The information to use 60 grams ? doubt.

254031-3 pos14 part inlay key can be damaged pos 11 drive rod 315146-2 can broken IF mechanical damage or dried out by leaking gasket / orings.
For better repair use after a repair of some parts an maintenance kit 193394-1 If the working hours are on it, but also after an repair on other parts because leaking tools can be dried out and give cured o rings in a very short time by building up overheat temperature inside and will not build up pneumatic power it will not do the job and is not good for physical strain.

Could be vapor locked. Prime the line and try again.

The GREASE for this heavy jackhammer
Makita 181490-7 Grease (if there are short carbon brushes to find ) replace all orings gaskets (and looking for an maintenance kit for this machine) 188015-8 thats the better way to service.

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...

Buy a new switch the old switch was modificated by an maintenance kit if you have an old blue or red real Kango from England. or black Atlas Copco .
But if you have the red Milwaukee Kango then there is only a new switch to replace.

1. The total condition of the seal anvil piston and striker are very important for the total condition of impact when spending a service kit (maintenance) when there is leakage at the front part everything will be hot inside and the rings will harden again quickly.

kango 900 950 round switch housing

Beware for all not all parts are more available, there is no oil used only Grease
Service Pack 1617000036 for Bosch Power Tool eReplacement Parts

Connecting rod
Part Number: 315419-3
or
Woodruff Key 4
Part Number: 254001-2
Makita HM1211B Parts List and Diagram eReplacementParts com
Or broken spindle/ worn bearing(s)

There is no question here

Spay it with WD40 penetration fluid.