YS 91SR installation in Trex 700

[rcmadpilot]

Has any one had challenges installing the "engine fan mount" due to the size of the engine shaft being larger than the hole in the engine fan mount?
Thanks

[tcast305]

I don't have the YS 91SR, instead I have a OS 91SZ. I noticed that the engine fan hub was a very tight fit onto the motor shaft. I had to use the nut to drive it down. I know its going to be a pain whenever I have to remove it.

Anyone else have the same issue?

Thanks.

[derelict]

yup... i have an ys 91 sr... and it was a pain in the *ss to put the fan assembly onto the shaft !

first i just drilled it down by hand... and for the last few mm i've used the nut!

Greets

marcel

[rcmadpilot]

Thanks guys, I filed it down until I could get it in.

[harryboe]

Maybe i missed something here ??

Ok it was tight but it fits without any mods. I put it over as good as possible and then used the nut to pull it down .. not sure if i can ever get it of but it's on now.

[mewsikman]

I had the same problem..... I broke my concentracion and put the hub on without the fan so I needed to get it off........

All I used was a vice with two pieces of wood under the tabs for the fan screws, Then I just started to gently tap on end of the prop shaft while supporting the motor....

[toaster12]

Same with mine on an OS91, had to tighten it down with the nut. But this is one place you don't want any slop!

As to getting it off use a fan puller or bearing puller!

e.g. http://www.justoffbase.co.uk/Micro-Puller-Fast-Fit-19-45mm-73mm-Reach-Sealey-PS995?sc=9

or fashion one such as this http://www.bergenrc.com/phpBB2/viewtopic.php?p=185&sid=4eca302585cdbbe2c14bd5de8421b0f2