Author Topic: Statomatic 4.5kva pulley/flywheel removal.  (Read 803 times)

Lewisparko

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Statomatic 4.5kva pulley/flywheel removal.
« on: October 26, 2023, 06:02:06 AM »
Hi all,

I'd like to remove the pully/flywheel from my 4.5kva startomatic alternator (to attempt to straighten the shaft). Having trouble ID'in the threads for the jacking bolts. Roughly 12mm diameter and a very coarse thread. Also can't see any other retaining devices other than the set screw above the keyway that I have already removed. Is it now just a case of jacking the pully off with the jacking bolts? Ny idea if it is an interference fit on the shaft?

Cheers,


broncodriver99

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Re: Statomatic 4.5kva pulley/flywheel removal.
« Reply #1 on: October 26, 2023, 07:21:29 AM »
Have you tried Whitworth? The CS engine was built with Whitworth fastners, I would assume the alternator would be as well. I don't know if maybe in later years the generator could have been Imperial/SAE. Definitely not metric though.

sirpedrosa

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Re: Statomatic 4.5kva pulley/flywheel removal.
« Reply #2 on: October 26, 2023, 10:04:01 PM »
Gentles,

All threads in CS are BSW.

Cheers
VP
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Zündfix in chamber and go (7Mai2023).

AdeV

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Re: Statomatic 4.5kva pulley/flywheel removal.
« Reply #3 on: October 27, 2023, 11:51:48 AM »
1/2" BSW if I remember correctly; unfortunately, that's the one thread size where you won't be able to jam a UNC screw in, as 1/2" BSW is 12TPI vs UNCs 13TPI.

Cheers!
Ade.
--------------
1x Lister CS Start-o-Matic (complete, runs)
0x Lister JP4 :( - Sold to go in a canal boat.