Need Advice
hello folks!! anyone here very familiar with Benzene Trainer helicopter. need a...
hello folks!!
anyone here very familiar with Benzene Trainer helicopter. need a help with a special something.
please see photo attached. part # 830/64. also known as clutch bell assembly. I would like to know the following -
1) how can I take this part, apart?
2) also, how can I take the 2 bearings out, which are inside this clutch bell assembly.
many thanks in advance!!
3 Answers
Hi Tidal, this is a Vario critical part around 130USD, to not fail in flight. I have no information about your skills and this is expensive. Is it the reason why not buying a new one?
If you succesfully remove the two bearings without damaging the supporting flange, you will also need to successfully put the new ones back without any damage or misalignment.
From experience, using new part is the best option, if available in the market, and less risk of issues.
See picture: In the past I replaced bearings myself with e.g. ceramic ones, but finally ended to buy ready to use kits, mainly to save time.
Of course, it's a different story if you have special requirement like wanting other brand/performance bearings.
(to install parts, we sometimes retract or expand metal by putting them in fridge or hoven)
Hello Remy, thank you for writing.
this is a new kit. one which has been in storage for 10 years haha
I found one of the bearings in this part seems a little scratchy to me. it could also be the grease has dried a little?
that’s why I thought about removal & re-greasing. and or maybe use a better quality bearing. but to me it is a part which I cannot know how to open.
if you have a time & this part please could you at least see for me ... like how to ...
appreciate your suggestions. thank you in advance!!
Hello,
Corrosion is the enemy and lubricant tend to deteriorate over time, mostly separation of the oil and its thickener. This is maybe what you have. With 60% humidity and 20°C, bearings can be stored for up to 10 years, also if well greased. I doubt your bearings have had such ideal conditions..
What I would try is to heat them little bit with some hair dryer, while gently turning the axe with some stick (wood brush works great) to see if the grease does release a bit. But if still scratchy, there is maybe some corrosion then.
For bearing replacement, I don't know this component so no idea how it was fitted, but generally they are just pressed inside, not glued.
Hope does help for now!