150 vtr fan section

[Joe d]

Hi , I need to replace the aluminium fan sections on the rotor as one of the fins has snapped off , I've read that this will unbalace the rotor ? Is it an easy job or does anything need balanced or is special gear needed , cheers joe

[Dean Lofthouse]

With reference to balance Joe, all you need to do after you have fitted them is a "static balance". It should be very close to being in balance anyway.

Remove all the drive belts so you can spin the rotor freely. Mark a position on the rotor at say 12 o'clock. Then let the rotor go and see if the rotor starts to slowly revolve. if it doesn't move, turning the rotor to 3 o'clock and do the same, then 9 o'clock. Basically you seeing if there is a heavy spot. The heavy spot will sink to six oclock so sand or going a bit off at that point till the rotor stays still in all positions.

One important thin is clean the mating surfaces behind the fins to ensure a good fit so crud can't collect behind.

 

[Joe d]

Thanks dean , that's a great help , much appreciated 

[woody paul]

How much has fin lost. 

[Joe d]

2 hours ago, woody paul said:

How much has fin lost. 

Just one of the fins , looked like it had been cracked for a while 

[woody paul]

My 150 lost half of a fin about 10 years ago, have never bothered about changing it and it gets a hard life. 

When bearings start to make a noise them will strip it and replace. 

[htb]

Wait for the rattle as they go up the spout.