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John,
Our machinist at work is going to make a replacement pulley, I just have to source a piece of cast iron bar.
We thought about aluminium because it isn't going to get much use but if I can get cast iron I'd prefer it.
I did think about a 'bush repair'..... make a large 'washer' to fit over the boss at the front of the pulley and hold it in place with a few screws but I think a replacement is a better option.
Colin
The steel merchant in Hallam is worth a try . Down the road from MELSTEEL , opposite side of road .... they have a lot of off cuts and sell by weight.
http://www.alloy-steels.com.au/
or this place in Dandenong ..but you have to order first
http://buau.com.au/english/b_1891.htm
Quote:
Originally Posted by gromit
You may find mild steel easier to find than cast iron, almost as easy to machine, and will work just as well if not better in this application.
John
John,
I've just spoken with a customer who makes this sort of thing all the time and he also suggested staying clear of cast iron.
Aluminium is also a possibility with a speedi sleeve fitted where the seal runs or he also suggested steel as a better option, even here he suggested fitting a speedi sleeve rather than trying to get the correct surface finish.
He is going to cut the keyway for me, I think I'll show him the pulley tomorrow and see what he will charge for making it.....
Colin
My customer wasn't interested in making the pulley for me so it will have to wait until the workload drops off in our workshop.
The seal is 11/2"OD 1"ID 3/8" thick. Picked one up locally along with a roll of 0.4mm gasket paper for $5 cash, don't you just love the cash economy...
Colin
Gromit,
firstly,
do you have a 'blueprint' for the pulley? there is a bloke near here with huge pile of bits like puleys etc, if I have plans of what you are after I could try and motivate him to fossick through.....(so long as I can hand it (the 'blueprint') to him to use!)
secondly,
recently I was told of a complete already removed governor that may be for sale...
I was interested but can you tell me what the uses are for it? (eg the welder...and?)
what models were they fitted to...
what parts/pieces are required to completely fit it? (eg to make sure its all there)
and lastly what do you think would be a reasonable price (ballpark guess only)
cheers
digger
Digger,
I'll make a sketch & send you a scan thanks....
I've heard of the governor selling for silly money, but it's only worth buying if you have a need for it. If I remember correct there were a couple for sale at Cooma 3 years ago for about $1,000 each.
The part that is often missing is the spring loaded actuator rod.
Uses...basically holding a constant engine speed under varying load conditions. eg. running equipment off the PTO like the welder, a pump etc. that have a varying load on the engine.
I'm no expert but for the governor to work you will need the hand throttle assembly, governor mounting bracket including nuts & studs, pulley, actuator rod & throttle rod plus the bracket on the carby.
Colin
Digger,
Sketch attached.
Apologies for the quality, done while I had lunch. Measurements are with a plastic ruler, all I could find was a blunt pencil to produce the drawing.
I think the pulley will be unique to the governor. The machinist at work will be writing a program next week for the CNC.
Thanks,
Colin
For stationary vehicle use, an engine-oil-cooler is also recommended I believe,
Cheers Charlie
We've been a bit busy at work so our machinist (Tom) has only just found time to start this (partly my fault because I'm in Sales).
The inside of the pulley and the belt groove are finished, one of my customers will machine the keyway for me and then the front of the pulley will be finished off. I just have to check it on the governor shaft and ream as required before the keyway is cut.
Tom found it a challenge (compared to the day-to-day machining he has to do) but wrote a program for our NC lathe.
Colin