Bosch RH540M Parts problem

[whejdak]

I bought a none working RH540M Hammer Drill from Bosch. It was a non working drill and I thought that I could repair it.
It hummed but would not turn. I pretty much assumed it was a bad armature.
Here is where the nightmare start.
I ordered a new armature on line. Said it fit my drill. After it came in, I found that the bottom of the armature bearing from my old and the new did not fit.
All video's showed that you simply push on the bottom bearing. The only way that it would go on was to press fit it. After jerking around taking it on and off, i finally decided to just remove a fraction of the armature shaft surface so that it would slide on instead of press fit. I finally got this part to work. Then I found that the fan supplied with the new armature would not fit the stator opening. I removed the fan and put the old fan back on. Worked great.
I could go on for a long time talking about this situation, but long story short.
I re-ordered armature and told them about the problem. Got the new part and it had the same problem as the first one that I ordered.
You need to be very careful where you buy the armatures from for this Bosch Hammer.
This one said is was for my unit, but it became obvious that it did not fit.
My diagnosis was correct that it had a bad armature. It should have been a simple buy and replace armature. BEWARE, maybe by serial number they are different, but mine didn't work, nor did the replacement.
I need to modify the one that came in because there isn't any way to explain the problem when you order from Amazon. You simply send back the old and a new part comes back. Problem. Same old none fitting armature.
I hope that this was clear. Much more detail left out. I am just trying to make you aware of parts order for Bosch Hammer drill

 

[RTM]

Some of the parts places have parts by serial number, don't see it on this tool. Did you check Bosch's site to see if the part number was the same as what you got? If it was, if be talking to them. You have a better chance of help than trying Amazon, IMO.


Bosch shows
1 619 P10 864

Compatible with concerns me for something critical like the armature, or gearboxes.

 

[finn]

If I ordered something like that from Amazon, I’d guess it would have at best a 50% chance of fitting.

I don’t order auto parts from them either, as I have seen listings that are obviously incorrect.

Now that Rock Auto no longer ships to Arizona, I’ve had to resort to the classic car specialty warehouses to support my addiction. That’s ok for unique items, but shouldn’t be necessary for commodities like wheel cylinders.

The last Amazon battery I ordered didn’t come close to fitting, and there wasn’t enough information in the listing to predetermine that.

Fortunately ( or maybe unfortu) I had another use for it.

 

[whejdak]

I appreciate the fact that I had good dealings with Amazon. Nothing technical just money and exchanges.
the part numbers came off of the Bosch site. Bearings have numbers on them, but not armatures or O-rings or bushings.
the shaft size on the lower bearing end was 8mm on both new and old piece. but, new didn't fit. the shaft looked different too.
Fan was no excuse for that. it was larger then the original.
I would have love to talk with or communicate with Bosch but saying to do that is easy, trying it ...... I doesn't work.

 

[whejdak]

It is just hard for me to understand how a supplier can put the compatiblility out there, when they are not.

 

[dyermullet]

Don't blame bosch for amazon problems.

Their is a decent chance that armature you purchased on Amazon is counterfeit.

 

[whejdak]

I didn't make it clear. I wasn't talking about Bosch. I meant suppliers of Bosch in this case. Amazon!/
I resurfaced the bottom end of the armature shaft and that bearing now slips on the way that it should.
I also turned the bushing around. i.e. I put the bearing on first and then the bushing. Now whe I tighten the bearing it does not bind up the armature. Removed the old plastic fan (smaller one) put it on the new armature after removing that fan
I reassemble to the point where I could try the new armature.
It worked. Bad amature. I'll tear the rest apart later now that I know it will work.

 

[PCustoms]

Link to Amazon listing?

 

[whejdak]

Aftermarket Bosch 1619P10864 Armature for RH540S RH540M Rotary Hammer and GSH5E GSH5CE Demolition Hammer

Aftermarket Bosch 1619P10864 Armature for RH540S RH540M Rotary Hammer

www.fridayparts.com

I tried posting a picture. Don't know who to do it obviously.

 

[whejdak]

Well it looks like it worked. See the bottom of the armature. Threads and then there looks like a dark ring where the bearing will sit and finally the end stop for the bearing.
This shaft if the one that the bearing must be pressed on. Shouldn't have to press it on. Once the armature is placed in the stater housing that shaft should just slip into the bearing and tightened down. Every video that I've seen shows that it slips on, not pressed.

 

[whejdak]

nn

 

[whejdak]

Hopefully, the bottom attached file shows the differenct in the shafts that I've been talking about.

 

[RTM]

Hopefully, the bottom attached file shows the differenct in the shafts that I've been talking about.

Nothing attached here

 

[whejdak]

 

[whejdak]

Both shafts mic out nearing the same at just under 8mm. But one shaft fits and the other must be pressed.

 

[whejdak]

Never mind about the second picture. It is the same as the first. I copied it wrong

 

[whejdak]

This is the shaft that I was trying to show that is the correct one. See the differece on bottom of armatures!

 

[danski0224]

Don't know what the "RT" designation means, or what the difference is, but you could have bought a factory recon for about $350.00.

Factory Reconditioned Bosch 12 Amp 1-9/16 in. SDS-Max Corded Combination Rotary Hammer

Factory Reconditioned Bosch 12 Amp 1-9/16 in. SDS-Max Corded Combination Rotary Hammer

www.cpooutlets.com

 

[danski0224]

Aftermarket Bosch 1619P10864 Armature for RH540S RH540M Rotary Hammer and GSH5E GSH5CE Demolition Hammer

Aftermarket Bosch 1619P10864 Armature for RH540S RH540M Rotary Hammer

www.fridayparts.com

I tried posting a picture. Don't know who to do it obviously.

This isn't an OEM part. No wonder why it doesn't fit right.

 

[The Cobbler]

It's not amazons fault, nor is it Bosch fault. the fact that it's aftermarket says it's all .
I'm not saying OEM is not a good thing, but it can be problematic .
at least you were able to make it work, which is a good thing

 

[dyermullet]

Agreed. Most people would not be able to identify the problem and perform the modifications to make the part work for your tool. You definitely went above and beyond.

 

[whejdak]

An "_RT" means that it was reconditioned.

DANSKI0224 how do you know that it isn't an OEM part???

 

[RTM]

An "_RT" means that it was reconditioned.

DANSKI0224 how do you know that it isn't an OEM part???

Says AFTERMARKET in the header?

 

[danski0224]

DANSKI0224 how do you know that it isn't an OEM part???

Sez so right in the link.

"Aftermarket Part".

 

[The Cobbler]

DANSKI0224 how do you know that it isn't an OEM part???

from the listing

 

[PCustoms]

Has anyone pointed out this is aftermarket, and not from Amazon either?

 

[danski0224]

Why?

You just did.

 

[dyermullet]

At least this type of tool is repairable. Most items nowadays are just waiting to occupy landfill space.

 

[whejdak]

I bought this Drill for $25.00 knowing that it was bad. The armature and service kit was around $150.
I pretty well new from the get go that it was an armature. Looked like it was a piece of cake to fix.
One last comment about the purchased armature.
Those were pictures of armatures I got off of the internet.
the armature that I bought said it was OEM. So, aftermarket/OEM/???? it didn't fit.

 

[PCustoms]

the armature that I bought said it was OEM. So, aftermarket/OEM/???? it didn't fit.

Well, I asked for a link to what you bought, not some random thing similar to what you bought

 

[whejdak]

You asked for a "Link to Amazon listing?"
That is exactly what I sent. A link to an Amazon listing.
You didn't ask for a link to what I bought. Doesn't matter anyway.
Problem found, prolem solved with the help from this forum.

 

[PCustoms]

You asked for a "Link to Amazon listing?"

In your OP you write that "I need to modify the one that came in because there isn't any way to explain the problem when you order from Amazon." Implying you bought it from Amazon.

I asked for the Amazon link, I should have said please provide the link to the exact Amazon item you bought. I mistakenly assumed you'd understand that's what I meant.

That is exactly what I sent. A link to an Amazon listing.

The link you sent is not an Amazon link.

Im glad you're happy now, I'm going to bow out of this thread

 

[whejdak]

It is an Amazon link!
Texting information is not the easiest thing to do in a forum.
Thank you for looking at this anyway and providing what ever you thought was informational help.

 

[dyermullet]

What have I learned from this thread?

The url for amazon website is fridayparts.com

Bosch oem parts are labeled aftermarket and watch out they don't work without some fitting.

 

[dyermullet]

Look I found a bosch armature on "amazon".

https://www.aliexpress.us/item/3256810258012802.html?spm=a2g0n.productlist.0.0.3f24arZEarZETT&browser_id=e8cc31ae80c54596a15980edb3ad3012&aff_platform=msite&m_page_id=vmhiparvwmcayjiz19c9c4da0f21f73ab9bf243dad&gclid=&pdp_ext_f=%7B%22order%22%3A%22-1%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&pdp_npi=6%40dis%21USD%21169.21%21135.37%21%21%211151.06%21920.85%21%402101dedf17721488591092314eb683%2112000052428214440%21sea%21US%210%21ABX%211%210%21n_tag%3A-29910%3Bd%3A5e0fc0f1%3Bm03_new_user%3A-29895&isseo=y&algo_pvid=2564361a-eaa9-4765-beb4-21b416bd602d&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005010444327554%7C_p_origin_prod%3A

 

[dyermullet]

Thank you for looking at this anyway and providing what ever you thought was informational help.

You're welcome.

 

[whejdak]

Dyermullet,
I looked at the http: that you sent. Combo stator and armature. More importantly....... look at the bottom shaft of the armature. This is the armature that will work. Doesn't have that ring around it. Flat and a stop. That is if they send that one to you.