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Old 01-31-2018, 03:34 PM   #1 (permalink)
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Default Tail grip disassembly

Hi all,

At some point soon Iím going to make up some new tail grips, any tips for getting the bearings out of the existing grips - Iíve had the grips off but the bearings are rock solid in there!

I wonít be re-using them but might keep as spares, just want to have a fiddle really...

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Old 01-31-2018, 03:55 PM   #2 (permalink)
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Metal or plastic? Oven is usually the answer...
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Old 01-31-2018, 04:22 PM   #3 (permalink)
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Plastic tail grips....I think the bin might be the answer in my case tbh lol, they really didn't want to budge when I took a look at them a few days ago!
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Old 01-31-2018, 04:35 PM   #4 (permalink)
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Oven might still work, but are the bearings really still the ones you want to use?

I like to work really hard to get them out, and then wreck them in the last part of the operation. Takes longer, and costs more all at the same time.
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Old 01-31-2018, 04:59 PM   #5 (permalink)
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Haha, I have a feeling Iíll be ending up in that exact situation! Iíd like to build up my own tail grips from scratch anyway, I didnít take the pre-assembled set apart when I built the heli and my curiosity wants to check that everything was put together correctly....


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Old 01-31-2018, 05:00 PM   #6 (permalink)
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Btw, I wonít be re-using the bearings if/when I do get them out - Iíll start from scratch with a complete new kit


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Old 01-31-2018, 05:37 PM   #7 (permalink)
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You should be able to stand the tail grip( blade bolt hole down on bench ) straight up and tap the bearings all out. Just have to find the right size tool for the job. The bearings all slide in from one side unless MSH changed it from what manual shows. Since you are not reusing the bearings it will not matter if you damage them.

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Btw, I wonít be re-using the bearings if/when I do get them out - Iíll start from scratch with a complete new kit


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Old 01-31-2018, 05:46 PM   #8 (permalink)
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Thanks ifheli, Iíll destroy them if I have to, just want to check on the thrust bearings really, will report back when done!


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Old 02-10-2018, 01:46 PM   #9 (permalink)
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Default Tail grip disassembly

Need some advice if possible please....received the MSH41176 tail blade holder set today, there's a couple of "cupped" washers (very small) which are not shown on the MSH assembly manual, can someone confirm which way round they are supposed to go? I'm guessing that they sit between the head of the bolt and the first radial bearing, to provide a ďpre-loadĒ?

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Old 02-11-2018, 08:59 AM   #10 (permalink)
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I didn't have any in the last grips I received from msh, I don't think anything needs to be preloaded, as they get loaded from centrifugal force. I'd follow the manual, perhaps the were added by mistake. Do you have any pics? Also I'd reach out to MSH.
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Old 02-11-2018, 09:36 AM   #11 (permalink)
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Hmm, ok thanks, Iíll take a look at whatís fitted to the factory pre-assembled set currently on the heli. I figure they are acting like a spring washer would, providing a little in/out tension


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Old 02-11-2018, 02:26 PM   #12 (permalink)
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Click image for larger version

Name:	IMG_5822.jpg
Views:	68
Size:	67.3 KB
ID:	737274

Cupped washers in the middle of the pic. It seems my existing assembly has the same washers, sat next to the head of the bolts.
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Old 02-11-2018, 02:39 PM   #13 (permalink)
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And the new thrust washer casing marked ďOĒ has a larger ID than the one marked ďIĒ so Iíll swap those around....I think I read that someone else spotted this before too?


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Old 02-12-2018, 04:40 AM   #14 (permalink)
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Those beveled washers have made it in to some assemblies. They are not used. No one seems to know why they made it in the the Parts bags.

Where were they on your existing tail? Washers on the bolts for the grips?
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Old 02-12-2018, 05:29 AM   #15 (permalink)
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Yeah, small standard washers as well as the cupped washers, on both grips.

Getting the bearings into the grips (new set) is a right royal pita - the tolerances on the grips are extremely tight.....end up scouring some of the plastic which then fouls on the tail hub shafts. Iíve had to take them apart again and start over.


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Old 02-12-2018, 09:41 AM   #16 (permalink)
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I put all the bearings onto a 1.5 mm scorpion driver and simply push it thru the tail grips, and finish pushing the rest of the way with a driver the same diameter as the outer ring on the front bearing

I can get pictures when I get back home but this method works great
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Old 02-12-2018, 11:20 AM   #17 (permalink)
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Thanks Colin, exactly what I did although I use a dowel to push them home. Still, the bore in the plastic is extremely tight....


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Old 02-12-2018, 03:55 PM   #18 (permalink)
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Just push on the stack of bearings using a dowel, driver, etc. It just has to be larger than 3mm in diameter.
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Old 02-13-2018, 03:03 PM   #19 (permalink)
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Yeah, thanks, I have a perfectly sized dowel for pushing them in (6mm I think) and a narrower dowel for pushing out - Iím going to take the spare set I have apart and start again, Iím convinced thereís tiny slivers of plastic between the bearings that was shaved off when putting them in


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Old 04-19-2018, 06:49 PM   #20 (permalink)
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Update on the ďcupped washersĒ query - MSH confirmed it is indeed a design change, intention being to prevent the washer under the bolt from touching the bearing, see attached pic
Click image for larger version

Name:	IMG_5970.jpg
Views:	58
Size:	103.9 KB
ID:	743735


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