MEP 802A vibration isolator

[grywitt]

Hello .
So one of the 802s I got needs mounts. I did buy one off ebay. It's not the exact same part number. It's -2. I purchased it by gen not part numbers. I'm learning. Anyway the front and rear isolators on the left are cracked bad. I can't seem to find and front ones anywhere. I'm attaching some pics. The button half of the isolator is still in really good shape on the front one. You suppose I can turn it over and use it that way? I know it's not perfect but it would probably be better hu? Also if anyone knows how i can but them i would be grateful. I wish I could spend some time with done of you guys and learn some things. ( I actually can't find the motor one either )

The part numbers are 88-21070-3 and
88-20027-1

Funny thing. I see now while writing this that the part installed on the gen doesn't match the TM either. I guess the new one is closer. Ha ha. Only one number away.

 

[2Pbfeet]

I can't help with the OEM isolators, but I use McMaster-Carr for vibration isolators all the time. There are in my experience two ways to match new isolators (non-OEM); one is to weigh each point, and purchase matching isolators. The other is guesstimating the weight, and swapping in stiffer or softer isolators later. In my experience guesstimating often wins out because of dynamic nature of different loads.

All the best, 2PbFeet

 

[grywitt]

I can't help with the OEM isolators, but I use McMaster-Carr for vibration isolators all the time. There are in my experience two ways to match new isolators (non-OEM); one is to weigh each point, and purchase matching isolators. The other is guesstimating the weight, and swapping in stiffer or softer isolators later. In my experience guesstimating often wins out because of dynamic nature of different loads.

All the best, 2PbFeet

I'm not gong to lie I haven't responded because I'm going to show how little I know about these things. By weights you mean the weights they are supporting right? Do the isolators have pretty standard shapes and sizes? How do you match those up? Sorry for my ignorance about this. I did flip over the two front ones and swapped the motor one that I had a replacement for and it does seem a lot smoother but I would like to just change them all since so many were damaged.

 

[2Pbfeet]

I'm not gong to lie I haven't responded because I'm going to show how little I know about these things. By weights you mean the weights they are supporting right? Do the isolators have pretty standard shapes and sizes? How do you match those up? Sorry for my ignorance about this. I did flip over the two front ones and swapped the motor one that I had a replacement for and it does seem a lot smoother but I would like to just change them all since so many were damaged.

Yes, sorry for not being clear the first time. Yes, you need a weight. Isolators come in standard sizes and types.
Because isolators come in a variety of shapes and sizes, bolt sizes, load rating, temperature ratings, and materials, it can be helpful to browse a catalog or use your Google-fu to browse around.

As an example; flange mounts like those in the MEP-803/802.
Have a browse here, including the "about" section at the top,

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

Once you have the style of mount you want, you find the right bolt size, the right weight (load) rating, and how far can allow it to move under vibration. So, that is why you need an estimate on the weight.

Unless you know that you are chasing unusual vibrations or frequencies at odd temperatures, rubber is generally the material of choice. For large gensets, those are often suspended on horizontal coils to take the heavy load and the vibration of those units.

Again, there may well be a nice supply of the OEM MEP-803A mounts. I just haven't ever tried to find them.

All the best, 2PbFeet

 

[grywitt]

I can't help with the OEM isolators, but I use McMaster-Carr for vibration isolators all the time. There are in my experience two ways to match new isolators (non-OEM); one is to weigh each point, and purchase matching isolators. The other is guesstimating the weight, and swapping in stiffer or softer isolators later. In my experience guesstimating often wins out because of dynamic nature of different loads.

All the best, 2PbFeet

I've been looking on McMaster-Carr. I see what you mean. Thank you for the tip

 

[grywitt]

McMaster-Carr is awesome. I don't know why i always forget that.

I'm not finding oem easily but I can definitely find mounts to work with McMaster-Carr. They have exactly the style and dimensions needed.
Thanks again.

 

[grywitt]

Yes, sorry for not being clear the first time. Yes, you need a weight. Isolators come in standard sizes and types.
Because isolators come in a variety of shapes and sizes, bolt sizes, load rating, temperature ratings, and materials, it can be helpful to browse a catalog or use your Google-fu to browse around.

As an example; flange mounts like those in the MEP-803/802.
Have a browse here, including the "about" section at the top,

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

Once you have the style of mount you want, you find the right bolt size, the right weight (load) rating, and how far can allow it to move under vibration. So, that is why you need an estimate on the weight.

Unless you know that you are chasing unusual vibrations or frequencies at odd temperatures, rubber is generally the material of choice. For large gensets, those are often suspended on horizontal coils to take the heavy load and the vibration of those units.

Again, there may well be a nice supply of the OEM MEP-803A mounts. I just haven't ever tried to find them.

All the best, 2PbFeet

Ha ha. I got a quote for new isolators (oem) $1100 for the 4 of them. I think Ill pass on OEM.

 

[Guyfang]

Parts units Mep-802a -Houston 77581

Look at this thread. But hurry.

 

[Light in the Dark]

I've got an 802 I am about to break down soon, can check the mounts when I do if you are still looking.

 

[grywitt]

I've got an 802 I am about to break down soon, can check the mounts when I do if you are still looking.

Yes please do. The two front ones were both very cracked so I flipped them over but I would rather have them correct. Plus the one under the motor I didn't change seems good but If the other 3 were that bad it's got to have had extra stress.