I have a bosch hamer drill 11241 and i am looking for a repair kits or some parts. becouse the hamer is not working. the drill works ok i live in toronto canada

Hello Richard,
I see you have already replaced the speed control for this drill.
It looks likea nice piece of kit, anyway since the power comes from the switch / speed controller , through the first field winding then the brush on one side of the rotor, through the rotor, through the brush on the opposite side of the rotor, then through the second half of the field winding and returns to the switch (or) neutral, it is easyto check for continuity.
Because it does nothing when you press the trigger it sounds like a break in the motor circuit.
I hope you have checked that the cable itself is not broken internally
this happens very frequently near to the drill, where it gets the most bending and twisting.
Using a multimeter set on Ohms you can place one probe t the output from the switch (make sure that it is unplugged ) the other proe on the return side wiring, you souldget a reading of only few Ohms, if not then you can start to to trace through the individual parts. I will assume here that you have done the same for each cor of the mains cable.
For pictures of universal motors just bing or google (universal motor circuits)

Best regards,
Dave Reynolds.

• suggestion 11241-EVS is not a breaker hammer but a rotary hammer but has almost the same good quality as a breaker hammer because its a reasonable solid product with a liquid lubrication.

Solvent clean the front drill and chisel holder in the spindle thoroughly to control before buying a maintenance parts kit , decision to take the step ONLY IF............ the spindle (most expensive part) is smooth has no rips or is worn but first inpriority check in advance whether the three SDS driving lanes for the bit internal closure and drill -drive of the drive spindle =pos 25 in the drawing is still be adequate enough a 1.5 mm and round tops is critical. and below that its not worth to repair. because the working hours on it have been achieved.
Otherwise If its looked like the 3 lanes inside the spindle all three are always the same size about 2.5 mm thick and are square topped the spindle (and the other parts are must have to be in good condition to service. buy the maintenance kit its in the drawing to find in the parts list pos 897 and oil partslist pos (898 or 895) for if you have more then one rotary hammer to service.
Most cause its conclusive for only this parts but a priority is to replace ALL pieces of the service parts. even the carbon brushes
look that after replace the green ring on pos 856 that this hammer piston connecting rod is correct mounted on the right side again with the 4 little stips on the (bearing) outside thats coming downsite on the eccentric cog wheel for a smooth working for the plastic plain bearing on the metal connecting rod, At the slightest mistake in the parts and lubrication breaks this connecting rod soon.
The striker pin has great priority to clean and control that part against leaking a retainer ring should be removed by use 1 or 2 little screw driver(s) in the small holes on the side of the spindle can be seen this ring. if the ring comes loose tilt the ring cross with a long screwdriver pull it out with a nose pliers. to get the (striker pin or impact bold (the part thats beat the chisel )by other brands named the special ring has exterior little orings inside becarefull and look first inspected how its build before there will one come out to push it again inside if one will come out.
There is also a new retainer ring for the parts around the striker pin in the delivered maintenace kit
By replace the several parts beware on one ring not to forget a very important ring pos 104 to replace it and mount it with some sillicon grease in the right groove before in order to prevent a disappointment of leaking oil because if leaking oil /air after a while the parts will dried out in a very short time and will burned out soon.

There is one problem rised between me and this kind of BOSCH powertools about the ring(s) in pos 102 there are 2 shim (bearing) rings pos 102 to find by the service handling and what you will know from me is that you must look that there are two shims to find instead of one because of to get a correct backlash measure between 0.08 and 0.22 that's the right tolerance to adjust the shim bearing rings to have some tools ONLY to know how to handle if they are forget the second shim ring in your model if you are going to make service if you only have one shim ring because there where failures in the drawing by Bosch on this and to find more about the use in some other comparable bosch models like gbh4-32dfr or 4-40de that will have in order to adapt the backlash adjusting have a failure if only one ring is used.

More on fixya to find about the pos 102 position rings by Bosch in several models.

Hoping that YOU HAVE 2 rings of pos 102 you have nothing to do to concern on let it be as it is. only if one ring you should hear the difference in rotary position , it should not be turn smooth.

But if one shim ring is used only like in the drawing it must be a factory drawing failure.
look on the partslist by the model you have it shows there are 2 different rings to buy or order of the same pos 102 for it they sell you can buy if you do not believe on my story its so imortant to adjust the gears for the backlash if only one ring is in this machine you will have to order 4 new pieces 2 of the 2 neccesary to adjust know to make the backlash rather on 0,08 mm then 0,22 mm as soon you have adjust because otherwise the machine will make the rotary gear worn in a to short time.
If its has only one shim ring and its have making already a very bad noise in the rotary drive position replace only if its worth all to gether to service also pos 51 and pos 860






Bosch 11241EVS 0611241739 Rotary Hammer Parts

This is a pretty complex tool to tear down, make sure you're up for it.
1) you need to remove the bit holder assembly (#21-30) by prying the rubber seal off on the end, sliding the sleeve off, removing the hog ring, and then the 2 pawls along with the remainder of the bit holder parts.
2) In the nose of the tool behind the bit holder is a large snap ring (#154) that must be removed.
3) Remove the screws on the gearcase cover on the top (#873) and remove the cover.
4) The entire barrel assembly will slide out of the nose (This is generally not easy)
5) Using an o-ring pick or small screwdriver through the holes on the side of the barrel you can reach another hog ring on the inside - once released you can push the striker and hammer out from the nose out toward the piston end.

I would install a service kit and fresh oil if you decide to open this up Bosch 11241EVS 0611241739 Rotary Hammer Parts

Likely the hammers are broken inside the drill.

• Then first remove pos 21 if chisel is locked move the tool holder backwards as far as possible you see the rubber cap pos 21 can be released with a plier or little screwdriver then after that snapring pos 143 to remove with a shaft retaining ring pliers as little set it between the small groove between the two ends of the ring thats on the metal ring its on pos 31 a rubber ring beware PARTS pos 25 blocking elements 2 pieces are in most cases 1 or 2 are broken thats why its not release the chisel in most cases. , beware if this tool has had its working hours , its the best thing to sevice it a 1 617 000 430 a consumables kit and 1 615 437 511 a oil reservoir are not expensive and all the neccesary parts are to in this kit andits made repair more meaningful because carbon brushes and al neccesary o rings are in the kit. also the blocking elements and more . its much cheaper then the parts separate.
  

http://www.powertools-aftersalesservice.com/public/boschprof/service?p_auth=7NpuAYB2&p_p_auth=9xkD3xxM&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=L0JPUy9QVEFTLVBULVNJUy1TaXRlL25sX05MLy0vRVVSL1ZpZXdQcm9kdWN0LURpc3BhdGNoO3BnaWQ9YmI5NWI3MGRjM2E3NzQxY2ExYzA0OGYyM2IzMHVpYjMyYlY0O3NpZD12MElCS3pCTTZ4VzMwbWR6cXZzZDBEX0hxWW15eWZsWEpVT0NnTExzcVlteXliUG5QZUk9

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.

Don't know about your switch, but some have a round part in center of trigger that turns to change speed.

need to check the hamer piston. also if your switch is going out are you useing a long cored (yellow) need a cored rated no less than 15amp 50'. to long burns the switches out ever time. let me know I'll check my manuels. good luck

The best way is to find a Bosch service center and get the oil change kit. P/N 1615437511 this comes with a small bottle of oil and a top cover gasket. All you do is remove the top cover dump out the old oil and pour in the whole bottle of the new stuff. Couldn't be more simple.

Buy a hitachi li-ion 18 volt ds18dl.
All parts are repairable & replacebable should they breakdown. Ie gearbox.
Gearbox parts are not available on makita , only whole gearboix which can be expensive.
Cheers
Laurie