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★★★★★
★★★★★
Easy repair
ESV 11241 works like new after replacing the 2 O rings for the striker. Took awhile to figure out how to get barrel out, but finally got it. Will probably do the whole refurbish kit at some point in the future.
Guest - June 8, 2019
Verified Purchase
★★★★★
★★★★★
11248EVS uses 60mlof oil after tool is empty and put back together Thanks for direction to Bosch
I am assembling today thanks for your help
Guest - December 21, 2019
Verified Purchase
★★★★★
★★★★★
Exactly what I needed!
Placed the order and it arrived within a few days. Rotary hammer is back in service!
Guest - August 12, 2020
Verified Purchase
★★★★★
★★★★★
Gear Oil replacement
Replaced two o-rings and the gear oil and the hammer drill again works great. Old oil was dirty and low.
Guest - March 9, 2021
Verified Purchase
★★★★★
★★★★★
Restored hammering
I bought this and the repair parts kit to retire my rotary hammer back to hammering. But in hindsight this oil alone probably would have done it.
Guest - April 16, 2022
Verified Purchase
★★★★★
★★★★★
Easy repair..
As usual, parts ordered arrived timely. Demolition hammer works just fine
Guest - May 24, 2022
Verified Purchase
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1. Removed the screw on the top cover
2. Added the oil in the bottle
3. Installed new o-ring and replaced screws in cover.
** Originally the machine would not hammer. Come to find out I bought the tool used the there was a new tube of grease that had never been used and that was why it would not hammer. Each use
... Read moreof the tool you need to put a little bit of grease on the bit before locking the bit into place. I just happened to spill the oil when I removed the inspection cover.
1. Remove bottom plastic cover with allen wrench
2. Remove power cord(optional)
3. Remove nose piece assembly
4. Remove secondary handle
5. Remove top lid via. 6 T25 torx screws. Note: Machine thread
6. Drain oil
7. Place in vice holding on to neck right where secondary handle mounts
8. Looking in
... Read moreto nose area with snap ring pliers remove retaining ring, large keyed washer, and
large metal collar
9. Now standing in front of and looking down at the spot that you removed the lid rotate
piston so where it connects to the gear is either farthest or closest to you and use a flat
screw driver to gentle wedge the arm off the dowel that connects it to the gear and
pull out entire piston assembly
10. Now this next step your going to have to PAY ATTENTION, slide the barrel out thru the
Nose and place to the side. Back where the piston \"was\" at the very front of that pocket
there is a assemble that includes a gear sleeve, usually two shims, an outer sleeve,
and an inner sleeve. Don\'t scratch, bend, tweak, or mar these shims in anyway.
11. Now for the last piece, inside the nose body after everything is removed, look and you
will see an O-ring right in the middle, its no wider than 1/16th or 5/64ths of an inch.
Remove it.
12. Now inside the barrel there is a retaining ring, use a very small flat head screwdriver
from the outside thru one of those little holes and pry up just enough so as to pop it
out of the groove it is in. Now from the inside of the barrel use one of your looong looks, the one that looks like it was from captain hooks missing hand, and stick it down the
inside of the barrel and hook that ring, now gently wiggle that ring so it is perpendicular
to original position and yank with one hard pull and it should come right out of the barrel
Tap the upright barrel lightly on your work bench and the three other pieces should come falling out.
13. Now remove roto from vice and clean in side mechanical compartment with break cleaner. If you use a water based cleaner make sure to dry it out completely, like take an air
compressor to it when you think you got it all out. Also clean each part that you removed
as well
14. Now do these steps backwards up until step two.
15. Remove brushes one at a time. Note one brush has two wires, this is why I say one at a
time.
16 . Now just finish the assembly and don\'t forget to add your oil res. before running.
Bosch Model 11241evs - This is a very well designed tool. Not a big Bosch fan but this tool is worth fixing.
Lots of good advice here already. Take good pictures along the way, you won\'t regret it. It\'s easy enough that I was glad I didn\'t pay the Bosch factory $340 + Shipping.
The little internal snap ring that hold
... Read mores one of the strikers inside the tube - likely the part that\'s bad to remove. As one user explained, you have to work it through the holes in the side of the tube. It\'s a puzzle and you\'ll need a little patience. Everything else is straight forward - seals, etc. It\'s a little like working on an automatic transmission.
Opened unit put prong on piston added oil added other o rings and gaskets
Put unit back together and it still wonGÇÖt work so I scraped it and bought a new one
Would cost more than itGÇÖs worth
Already spent money on the repair kit
Disassembled the full nose assembly to get to the pnematic pistons. Very difficult for my model because of multiple internal and external snap rings, one of which is hidden internally and can be accessed only through two small holes.
Cleaned all parts -- accidentally allowed the old oil to spill from the gear case over the side of t
... Read morehe drill where it got into the wiring, switch, and air vents, requiring extra long to clean up .
Replaced the seals.
Reassemble -- very difficult reassembly -- needed 4 hands to compress the pneumatic assembly enough to get one of the snap rings fully seated.
My drill has had very light use but is nearly 20 years old so the seals dried out. The brushes are like new and did not need replacement. The seal kit fit great and the drill pounds away like new.
I have a Bosch model 11241evs Rotary Hammer. Gun only has 20- 25 hrs on it. was able to get into the hammer end of it with out taking motor apart. Brushes looked like new anyway. The striker [no 57] was stuck in the barrel, out of reach of the piston. And the breakdown from eReplacement does not show the striker pin [ no841] in their
... Read morebreakdown. Went to toolparts Pro for a correct detail of the gun. It was a time consuming tear down. ,Getting the snap ring out from the inside of the barrel was a challenge with that striker stuck in there. You need a lot of patience.
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Hammer action not working
Donald from Granite Bay, California
2 of 2 peoplefound this instruction helpful.
Difficulty Level:
Difficult
Total Repair Time:
1- 2 hours
Tools:
Pliers, Screw drivers, Wrench (Adjustable), Wrench set
Remove nose guard, large C-clip, remove misc pieces on nose of tool. paying particular attention to order and placement of remove parts. Open oil reservoir, remove oil, unhook hydraulic piston and remove driver barrel from front of tool. Take note of position of clutches, shims for re-assembly. Clean hammer barrel with brake fluid. Ta
... Read moreke barrel on wood work bench trying to remove driver pin from rear of barrel. Behind the first driver pin is a small c-clip deep inside the barrel holding in the front driver pin. Remove this c-clip using screw driver and curved set removal tool. Clean all parts, replace o-rings and parts as noted in re-build kit. Re-assemble in reverse order.
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Model Cross Reference
This part works with the following models:
ERP Number: ERP19504319
Manufacturer Part Number: 1615437511
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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