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 Bosch 11304 (0611304139) Demolition Hammer Parts

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 Fig # Img Part Name Availability Price
4
Bearing Housing
Bearing Housing
Part #: 1615805054
In stock
2 available
 $71.54
Add To Cart
5
Deep-Groove Ball Bearing
Deep-Groove Ball Bearing
Part #: 1610900015
In stock
10 available
 $29.24
Add To Cart
6
Screw Plug
Screw Plug
Part #: 1615500214
In stock
9 available
 $19.38
Add To Cart
7
Insulating Housing
Insulating Housing
Part #: 1615108104
Ships in 8 - 14 business days
 $26.68
Add To Cart
8
Fan
Fan
Part #: 1616610091
In stock
4 available
 $15.16
Add To Cart
9
Hexagon Nut
Hexagon Nut
Part #: 1613313000
In stock
3 available
 $3.99
Add To Cart
11
Felt Washer
Felt Washer
Part #: 1610108013
In stock
5 available
 $3.99
Add To Cart
12
Supporting Disc
Supporting Disc
Part #: 1610102616
In stock
3 available
 $3.99
Add To Cart
15
Needle-Roller Bearing
Needle-Roller Bearing
Part #: 1610910091
Ships in 8 - 14 business days
 $29.24
Add To Cart
19
Eccentric Shaft
Eccentric Shaft
Part #: 1616110033
Ships in 8 - 14 business days
 $163.02
Add To Cart
21
Cylindrical Gear
Cylindrical Gear
Part #: 1616318009
Ships in 8 - 14 business days
 $142.50
Add To Cart
22
Cylindrical Gear
Cylindrical Gear
Part #: 1616328036
In stock
2 available
 $122.55
Add To Cart
23
Needle-Roller Assembly
Needle-Roller Assembly
Part #: 1610913005
In stock
7 available
 $6.33
Add To Cart
24
Gear Cover
Gear Cover
Part #: 1615500323
In stock
1 available
 $122.55
Add To Cart
25
Connecting Rod
Connecting Rod
Part #: 1612001040
In stock
2 available
 $86.07
Add To Cart
Fig #ImgPart NameAvailabilityPrice
26
Needle-Roller Bearing
Needle-Roller Bearing
Part #: 1610910092
In stock
1 available
 $26.68
Add To Cart
27
O-Ring
O-Ring
Part #: 1610210033
In stock
25+ available
 $1.99
Add To Cart
28
Hammer Piston
Hammer Piston
Part #: 1618700043
Ships in 8 - 14 business days
 $323.76
Add To Cart
30
Retainer
Retainer
Part #: 1614601039
In stock
2 available
 $3.99
Add To Cart
32
O-Ring
O-Ring
Part #: 1900210156
In stock
21 available
 $7.27
Add To Cart
33
Piston Pin
Piston Pin
Part #: 3613101500
In stock
2 available
 $5.47
Add To Cart
34
Striker
Striker
Part #: 1618710039
In stock
6 available
 $46.74
Add To Cart
36
O-Ring
O-Ring
Part #: 1900210166
In stock
9 available
 $4.13
Add To Cart
37
Guide Tube
Guide Tube
Part #: 1615806029
In stock
3 available
 $296.40
Add To Cart
38
Guide Bushing
Guide Bushing
Part #: 1610220009
In stock
3 available
 $19.38
Add To Cart
39
Compression Spring
Compression Spring
Part #: 1614619005
In stock
6 available
 $5.47
Add To Cart
40
Intermediate Flange
Intermediate Flange
Part #: 1615700017
Ships in 8 - 14 business days
 $86.07
Add To Cart
41
O-Ring
O-Ring
Part #: 1610210008
In stock
2 available
 $4.77
Add To Cart
42
Striker Pin
Striker Pin
Part #: 1613123003
Ships in 8 - 14 business days
 $71.54
Add To Cart
44
Retaining Bracket
Retaining Bracket
Part #: 1618045026
Ships in 8 - 14 business days
 $190.38
Add To Cart
Fig #ImgPart NameAvailabilityPrice
45
Locking Bolt
Locking Bolt
Part #: 1613103004
In stock
2 available
 $42.18
Add To Cart
46
Clamping Sleeve
Clamping Sleeve
Part #: 2917760187
In stock
1 available
 $1.99
Add To Cart
47
O-Ring
O-Ring
Part #: 1900210172
In stock
3 available
 $8.38
Add To Cart
48
Locking Cover
Locking Cover
Part #: 1610516007
Ships in 8 - 14 business days
 $15.16
Add To Cart
49
Insulation Tubing
Insulation Tubing
Part #: 1610707000
Ships in 8 - 14 business days
 $1.24
Add To Cart
50
Protection Sleeve
Protection Sleeve
Part #: 3600421500
In stock
3 available
 $1.88
Add To Cart
51
Grommet
Grommet
Part #: 1610703019
In stock
2 available
 $4.13
Add To Cart
52
Fan Cover
Fan Cover
Part #: 1615500324
In stock
2 available
 $65.27
Add To Cart
53
Hood
Hood
Part #: 1615500325
In stock
5 available
 $37.34
Add To Cart
Power Cord
Power Cord
Part #: 3604460507
In stock
2 available
 $43.73
Add To Cart
End Splice
End Splice
Part #: 1900452003
In stock
20 available
 $1.99
Add To Cart
56
Grommet
Grommet
Part #: 1610703011
In stock
2 available
 $13.68
Add To Cart
57
Switch Cover
Switch Cover
Part #: 1615500212
In stock
6 available
 $8.38
Add To Cart
58
On-Off Switch
On-Off Switch
Part #: 1617200108
In stock
14 available
 $65.27
Add To Cart
59
Intermediate Plate
Intermediate Plate
Part #: 1615700041
Ships in 8 - 14 business days
 $86.07
Add To Cart
Fig #ImgPart NameAvailabilityPrice
60
Insulating Cap
Insulating Cap
Part #: 1615500330
In stock
6 available
 $3.99
Add To Cart
62
Switch-Pawl
Switch-Pawl
Part #: 1612026011
In stock
7 available
 $5.47
Add To Cart
63
Handle
Handle
Part #: 1615132010
Ships in 8 - 14 business days
 $21.66
Add To Cart
64
Rubber Torsion-Bar
Rubber Torsion-Bar
Part #: 1616334000
In stock
8 available
 $17.73
Add To Cart
65
Toothed Shaft
Toothed Shaft
Part #: 1613060005
In stock
4 available
 $54.15
Add To Cart
67
C-Clip
C-Clip
Part #: 2916660023
In stock
4 available
 $3.99
Add To Cart
68
Rubber Buffer
Rubber Buffer
Part #: 1613465001
In stock
3 available
 $4.77
Add To Cart
69
Intermediate Plate
Intermediate Plate
Part #: 1615700042
In stock
2 available
 $122.55
Add To Cart
70
Handle
Handle
Part #: 1615132011
In stock
11 available
 $21.66
Add To Cart
73
Self-Tapping Screw
Self-Tapping Screw
Part #: 1603435036
In stock
6 available
 $1.99
Add To Cart
74
Disc Spring
Disc Spring
Part #: 2916160009
In stock
25+ available
 $2.85
Add To Cart
75
Compression Spring
Compression Spring
Part #: 3614640501
In stock
25+ available
 $6.33
Add To Cart
76
Fastening Plate
Fastening Plate
Part #: 3611034500
In stock
3 available
 $3.99
Add To Cart
85
Brush Holder
Brush Holder
Part #: 1614336045
In stock
6 available
 $29.24
Add To Cart
86
Axle Pin
Axle Pin
Part #: 1610300033
In stock
1 available
 $17.73
Add To Cart
Fig #ImgPart NameAvailabilityPrice
87
Deep-Groove Ball Bearing
Deep-Groove Ball Bearing
Part #: 1610900027
In stock
2 available
 $24.34
Add To Cart
94
Sealing Plate
Sealing Plate
Part #: 1611015021
In stock
13 available
 $3.99
Add To Cart
95
Connecting Cable
Connecting Cable
Part #: 1614431030
In stock
2 available
 $5.47
Add To Cart
97
Hexagon Nut
Hexagon Nut
Part #: 2915011007
In stock
10 available
 $3.99
Add To Cart
99
Hexagon Nut
Hexagon Nut
Part #: 3613313500
In stock
9 available
 $2.99
Add To Cart
102
Sheet Metal Screw
Sheet Metal Screw
Part #: 2910211025
In stock
5 available
 $2.99
Add To Cart
104
Hex-Socket-Head Cap Screw
Hex-Socket-Head Cap Screw
Part #: 2910141201
In stock
21 available
 $1.99
Add To Cart
105
Screw
Screw
Part #: 2914551188
In stock
21 available
 $1.41
Add To Cart
106
Microencapsulated Screw
Microencapsulated Screw
Part #: 2914551189
In stock
25+ available
 $0.99
Add To Cart
107
Hex-Socket-Head Cap Screw
Hex-Socket-Head Cap Screw
Part #: 2910141242
In stock
25+ available
 $1.99
Add To Cart
108
Torx Oval-Head Screw
Torx Oval-Head Screw
Part #: 2603490023
In stock
14 available
 $1.99
Add To Cart
109
Hex-Socket-Head Cap Screw
Hex-Socket-Head Cap Screw
Part #: 2910141248
In stock
16 available
 $1.99
Add To Cart
110
Hex-Socket-Head Cap Screw
Hex-Socket-Head Cap Screw
Part #: 2910141356
In stock
19 available
 $1.99
Add To Cart
112
Sheet Metal Screw
Sheet Metal Screw
Part #: 2910211236
In stock
14 available
 $2.99
Add To Cart
114
Round-Head Grooved Pin
Round-Head Grooved Pin
Part #: 2917721034
Ships in 8 - 14 business days
 $0.99
Add To Cart
Fig #ImgPart NameAvailabilityPrice
131
Reference Plate Obsolete - Not Available
Part #: 1601110618
Discontinued
N/A
801
Motor Housing
Part #: 1617000851
Ships in 8 - 14 business days
 $763.80
Add To Cart
802
Field
Field
Part #: 1614220157
In stock
3 available
 $190.38
Add To Cart
803
Armature
Armature
Part #: 1614011092
In stock
10 available
 $370.50
Add To Cart
813
Needle-Roller Bearing
Needle-Roller Bearing
Part #: 1610910035
In stock
9 available
 $29.24
Add To Cart
843
Tool Holder
Tool Holder
Part #: 1617000428
Ships in 8 - 14 business days
 $562.02
Add To Cart
854
Switch Housing
Switch Housing
Part #: 1617000858
In stock
6 available
 $33.63
Add To Cart
858
Protective Cap
Protective Cap
Part #: 1610591001
In stock
4 available
 $7.27
Add To Cart
859
Slotted Pan-Head Screw
Slotted Pan-Head Screw
Part #: 2910091118
In stock
6 available
 $2.99
Add To Cart
861
Mounting Plate
Mounting Plate
Part #: 1617000429
In stock
3 available
 $10.89
Add To Cart
881
Torx Oval-Head Screw
Torx Oval-Head Screw
Part #: 2912771120
In stock
15 available
 $1.99
Add To Cart
882
Spring Lock Washer Obsolete - Not Available
Part #: 2916699130
Discontinued
N/A
884
Insulating Plate
Insulating Plate Obsolete - Not Available
Part #: 1611099003
Discontinued
N/A
890
Un. Flange-Mtd. Motor
Un. Flange-Mtd. Motor
Part #: 1617000848
In stock
5 available
 $608.76
Add To Cart
35
O-Ring
O-Ring
Part #: 1610209007
In stock
2 available
 $7.27
Add To Cart
Power Cord
Power Cord
Part #: 3604460507
In stock
2 available
 $43.73
Add To Cart
End Splice
End Splice
Part #: 1900452003
In stock
20 available
 $1.99
Add To Cart
71
Nameplate Obsolete - Not Available
Part #: 161111A004
Discontinued
N/A
84
Insulating Plate
Insulating Plate Obsolete - Not Available
Part #: 1611099003
Discontinued
N/A
88
Shaft Sealing Ring
Shaft Sealing Ring
Part #: 1610283016
In stock
2 available
 $8.38
Add To Cart
89
Insulating Plate
Insulating Plate
Part #: 1610009008
In stock
2 available
 $2.22
Add To Cart
96
Connecting Cable
Connecting Cable
Part #: 1614448037
Ships in 8 - 14 business days
 $6.33
Add To Cart
111
Microencapsulated Screw
Microencapsulated Screw
Part #: 2914550034
In stock
25+ available
 $2.85
Add To Cart
119
Reference Plate
Reference Plate
Part #: 1601110058
Ships in 8 - 14 business days
 $1.24
Add To Cart
820
Needle Bearing
Part #: 1610910094
Ships in 8 - 14 business days
 $24.34
Add To Cart
844
Retaining Bracket
Retaining Bracket
Part #: 1618045026
Ships in 8 - 14 business days
 $190.38
Add To Cart
879
Spiral Spring
Spiral Spring
Part #: 1614652001
In stock
15 available
 $2.99
Add To Cart
883
Carbon-Brush Set
Carbon-Brush Set
Part #: 1617000425
In stock
19 available
 $24.34
Add To Cart
895
Gear Box Grease
Gear Box Grease
Part #: 1615430016
In stock
1 available
 $98.33
Add To Cart
Fig #ImgPart NameAvailabilityPrice
897
Service Pack
Service Pack
Part #: 1617000426
In stock
6 available
 $65.27
Add To Cart

Enter your engine's type number in this search field to show the parts that match your engine.

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Drill Parts  Demolition Hammer Parts

Repair Guides
Tool Diagnosis: Is it the Brushes or the Switch?
Tool Diagnosis: Is it the Brushes or the Switch?

This article describes the differences between power switch and carbon brush failure symptoms.

Diagnosing Electric Power Tools 101
Diagnosing Electric Power Tools 101

This article is a troubleshooting guide for problems and malfunctions common to most electric power tools.

Power Switch Repair 101
Power Switch Repair 101

This article is a 101 repair guide for power tool switch replacements, explaining the general steps involved in replacing a switch assembly.

Power Tool Care and Maintenance 101
Power Tool Care and Maintenance 101

This article suggests guidelines for power tool care and maintenance. It also describes information tools available at eReplacementParts.com.

Discussion
Discussion for the Bosch 11304 (0611304139) Demolition Hammer

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1568502
Question: Bosch 0611 Demolition Hammer

1568502

not hammering bought a service kit now motor is dragging? any suggestions?
Glynnvh61
Question: How To Reassemble On Off Switch?

Glynnvh61

After removing the cover on the switch to repair, 3 stainless steel sleeves fell out. I need advise on where these go. Please help!!! Thank you
My toothed shaft that keeps the handles sheared off. I've ordered a new toothed shaft, looking for help with replacing broken one.
Garcia
Question: On-off Switch

Garcia

how remove on-off switch
1132020
Question: Bosch Brute Trigger

1132020

Brute Hammer came in not working, inspection revealed field wire disconnected plugged it back in hammer worked sent it on it's way. Came back again said it quit working within a minute, inspected brushes(looked good) checked switch one side was not working, Bosch uses a switch that has an extra throw (set of contactors) on it so move the wires to there, tool works sent it out. Came back again said it quit working in 5 minutes, switch was burned again. My question, is there anything that can be going off in the armature or field that can cause the switch to keep burning?
Tinkerdave
Reply: Bosch Brute Trigger

Tinkerdave

Hi,
Not really.Sounds like the inside rockers are burned on the switch and heating the switch up when its under a light load.Id replace the switch assembly and that should fix the problem. Hope that helps.Good luck.
Tinker
when re-assembling jackhammer, what is the torque setting on microencapsulated screw?
WJA
Reply: Torgue Setting On Microencapsula...

WJA

Hello steveg,

When replacing the 2914550034 microencapsulated screw. The torque setting should be between 55-60 foot pounds.

-WJA
jonstiles
Question: Replace Motor

jonstiles

How do I get the old motor out of a brute breaker
adia3597
Question: On Of Swuitch

adia3597

how to reconect on-of switch
rericksac
Question: Replace Power Cord

rericksac

How to replace power cord on bosh jack hammer
775260
Question: Striker Stuck

775260

On a bosch brute the striker seems to be jammed in the piston. No evident damage.any suggestions?
TedGeneralRental
Question: Bosch 11304-no Data Tag-034 Or 1...

TedGeneralRental

As the title line says...I am trying to identify my hammer without a data tag. I need a service pack, but don't know which one it is.
WJA
Reply: Bosch 11304-no Data Tag-034 Or 1...

WJA

Hello TedGeneralRental,

The motor assembly between the 034 and 139 is one of the main differences, but that is a little difficult to tell without disassembling the tool. There is one difference on the outside of the tool which will tell them apart though. It is the guide tube ( item #37 on both the part diagrams). By looking at both diagrams you will be able see the differences, and hopefully identify your hammer.

Hope this helps,
WJA
GeneLanzl
Reply: Bosch 11304-no Data Tag-034 Or 1...

GeneLanzl

HeyTedGeneralRental,

The outside of the piston housing on the 139 has very deep ridges while the 134 is smooth just like the drawings show. Hope this with WJA's explanation helps.
Guy
Question: Piston

Guy

Does the piston slide in the cylinder?
We have several (18) model 11304-034 demo hammers. Is there a way to sub parts from a 139? We do have to order armatures and brush holders for some of these units anyway so a change of more than the fan would not be a problem if it will work. We were given the direct number for Bosch and they said all we had to do was change the armature, but if you check the part number on these two units it is the same. I would appreciate a call if possible at 507-461-0758. Thanks
joe
Question: Change Brushes

joe

How do you repair a carbon brush set?
RAFAEL
Reply: Change Brushes

RAFAEL

BECAUSE THE MACHINE IS DAD
jordie
Question: Hammering

jordie

My hammer will not put the poundage to the ground unless I push extremely hard. Is there something worn out inside?
Does the jack hammer have a protective thermal switch, and if so where is it located. Also, what is the part featured in the drawing on the top right above #106 that doesn't have a number? Thanks Mike
paul
Reply: Bosch Jack Hammer Thermal Switch

paul

That is not a part. It is an electrical schematic showing the motor, brushes, & switch.
Dennis
Reply: Bosch Jack Hammer Thermal Switch

Dennis

The part above #106 looks like the leads to the switch. It does have an M; meaning motor.
mynor lima
Question: Cranking Sound..

mynor lima

Hi, is it normal that the hammer emits a cranking sound when it works? There is not heat or metal dust in the mechanic parts. THANKS.
mynor lima
Question: Shaft Motor Bushing

mynor lima

Hi, it's hard for me explain in English but I will try it. I wonder if in the end shaft of the rotor of the motor, it uses a bearing or a bushing, because I've tried to repair it with another bushing but that just worked one day. In the manual it doesn't show if it's special bearing or a bushing. THANKS
scott
Question: Install Conecting Rod

scott

I noticed that the connecting rod is not the same on both sides. How do you determine which way it must face or does it make a difference?
RICK8809
Reply: Install Conecting Rod

RICK8809

connect the cylinder & connecting rod w/ wrist pin,slip connecting rod over crank pin from either side to see which way the cylinder lines up w/ the hole best (centered). that's it!
will
Question: Greasing A Brute

will

Where can I get a lube chart for a Bosch BRUTE showing the types of grease and oils and where to put them? Thanks
Mark
Question: Changing Armatures

Mark

Hi I'm replacing a damaged armature in a 11304 brute is there any special tricks or additional work that needs to be done? Thanks Mark
tony
Reply: Changing Armatures

tony

Hi Mark,
Try using a #10awg cord. You wont burn out any more armatures.
Tony K
Reply: Changing Armatures

Tony K

Always replace the carbon brushes when replacing an armature.
james
Question: 11304 Demo Hammer

james

Where and how do I add oil? It was left up side down in moving and I could see that it lost a lot of oil.
GeneLanzl
Reply: 11304 Demo Hammer

GeneLanzl

James, there isn't supposed to be any oil in the Bosch Brute. It is lubricated with special Bosch grease which is mostly solid when cool. But to answer your question about adding lube, the unit has to be disassembled.
david
Question: Bosch Brute Hammer

david

One of three micro screws is crossthread and keeps backing out.
Dennis
Reply: Bosch Brute Hammer

Dennis

You might want to try a heli-coil for that hole.
GeneLanzl
Reply: Bosch Brute Hammer

GeneLanzl

David, does your machine already have heli coils in the threaded holes? Mine is a 139 , I bought it used, and it has all the 6 holes fitted with heli coils, although only three are used. When one bolt broke off and I had to extract it, I just rotated the 3 hole flange 180 deg. and re-installed the bolts.
dieselMEN
Question: Bosch 11304 Braker Repair

dieselMEN

I have a bosch 11304 Hammer. it seems to have lost its punch the motor and piston rod seen to work fine. I looked at the striker and piston there is no visible damage. although there is Grease every where. what give the striker power? is the grease supposed to be behind the striker in the cylinder? is the grease causing a suction, not allowing the striker to move freely?

thanks for any info
Mark
Tinkerdave
Reply: Bosch 11304 Braker Repair

Tinkerdave

Mark, The piston causes high pressure in the cylinder forcing a slug down the cylinder which hit the striker pin which hits the bit.The striker pin has two o-rings and moves back and forth in short strokes.This most likely where your problem lies.You have grease leaking from the transfer case and this is why it coming out the link removed a service kit and replace the grease but don't replace the striker o-rings unless their damaged as replacement o-rings will have to go through a break in run of a couple of hours to get the hammer action working good. Hope this helps.
dieselMEN
Reply: Bosch 11304 Braker Repair

dieselMEN

Thanks for your response, I have ordered the service kit and I am uncertain to where to put the grease. I currently have grease in the motor housing, (connecting rod area) the hammer piston (inside and out) and the Guide tube. I will clean the old grease out as best as possible.
What is the procedure for replacing the new grease?
Do I just squeeze the content of the tube in the motor housing (connecting rod area) and reassemble?

Is the o-ring you say not to replace #32 of the internal flange?
Bosch 11304 Parts List and Diagram - (0611304034) : eReplacementParts.com

Any help will is appreciated
Thanks
Mark
Tinkerdave
Reply: Bosch 11304 Braker Repair

Tinkerdave

Hi Mark.No you don't want to replace # 1610210033 ref #27. and yes you put the grease in the crankcase where the connecting rod is.the kit I believe gives you instructions on most of that. Hope that helps.
klhwarf
Question: Bosch 11304 Jack Hammer

klhwarf

Was using the brute electric jack hammer and it quit impacting at the bit. Have owned since new and has
cmoorejack
Reply: Bosch 11304 Jack Hammer

cmoorejack

Hey klhwarf.
Its probably not anything you have done..it may have developed a dry pocket where the striker moves[or doesn't move] Time for a service pack or at lease a re-lube of the striker and chamber..the service pack contains everything you will need to service your tool..just match up your model #...either a 11304 039 or a 11304 139..
parts avail at eReplacementParts.com : Power Tool Parts and Tool Repair
hope this helps..:)
cmoorejack
ronnie callahan
Reply: Bosch 11304 Jack Hammer

ronnie callahan

is there a tool (hone) to use on the piston tube when the bore is out of round!
Dale
Reply: Bosch 11304 Jack Hammer

Dale

Don't use a hone on this tool. Clean the piston and stiker really good. Put a fine film of bosch grease on both. go to youtube and type in ereplacementparts and there is a short video.
Accessories
Accessories for the 11304

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