Saito FG-57 Cam gear positioning; How to do?
#1
Thread Starter
Saito FG-57 Cam gear positioning; How to do?
Does any guru out there know how to position the Cam gears correctly on a Saito FG-57?
I have read the Saito 300 manual, but the FG-57 is different.
On the 300 I think there is a gear in between the cam gear and the crank-shaft.
On the FG-57 it is not.
On the FG-57 the Cam-gear is mounted "inside" the cam gear cover.
I have identified a dot and a line mark 90 deg to the dot.
I have read the Saito 300 manual, but the FG-57 is different.
On the 300 I think there is a gear in between the cam gear and the crank-shaft.
On the FG-57 it is not.
On the FG-57 the Cam-gear is mounted "inside" the cam gear cover.
I have identified a dot and a line mark 90 deg to the dot.
#2
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
Here is the Cam cover with Cam Gear integrated.
You can see the dot and the line that I found.
So, a procedure similar to the one in the Saito 300 manual would be GREATLY appreciated!
I will ask Horizon hobby too.
You can see the dot and the line that I found.
So, a procedure similar to the one in the Saito 300 manual would be GREATLY appreciated!
I will ask Horizon hobby too.
#4
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
I see! That is good to know! I can probably follow the procedure in the 300 then.
I was confused by these pictures in the 300 manual;
They have included something they call a "pinion gear"...I don't know what that is in Norwegian.
hehe, sorry.
In the position the "pinion gear" is in that drawing, it would be the tooths on the crankshaft....
I was confused by these pictures in the 300 manual;
They have included something they call a "pinion gear"...I don't know what that is in Norwegian.
hehe, sorry.
In the position the "pinion gear" is in that drawing, it would be the tooths on the crankshaft....
#5
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
I have dismantled everything. Next is getting the crankshaft out. It is hanging in the front bearing now.
I guess the method would be to heat it in the oven to, say 150 degrees celcius, and give it a kick with a soft hammer on the front end?
150 deg Celcius is.....wait for it...300 degrees Farenheit.
I guess the method would be to heat it in the oven to, say 150 degrees celcius, and give it a kick with a soft hammer on the front end?
150 deg Celcius is.....wait for it...300 degrees Farenheit.
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Propworn (04-20-2021)
#8
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
ORIGINAL: w8ye
That small pinion gear in those pictures is the crankshaft.
That small pinion gear in those pictures is the crankshaft.
I have already removed the hub, or propeller adapter as some might call it.
There is a tiny stop-screw hidden in the propeller hub, difficult to discover by yourself, I might add. [:'(]
#9
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
ORIGINAL: Old Fart
Replacing bearings?
Replacing bearings?
When putting the cam-gears back, it will be important to get those dots correctly. When doing that, I have seen that they might turn out of position
while you try to wiggle them in place. Perhaps a trick is to hold the crankshaft/housing vertically while trying, avoiding gravity to work on the cams.
Or perhaps there is another secret trick?
#12
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
Very good secret tricks, They will be very handy, thanks !
Does anyone know what the line-marking on the cam gears are for? ( ref photo above)
Does anyone know what the line-marking on the cam gears are for? ( ref photo above)
#13
RE: Saito FG-57 Cam gear positioning; How to do?
1.The cam gear with dot only is for the reqular cylinder (intake and exchaust magnaged as a single cylinder engine)
2.The cam gear with dot and slot is for the other cylinder (intake and exchaust are revesed comparing to a reqular single cylinder engine),
and use the slot to align with crankshaft when this cylinder at TDC.(forget about the dot on this cam gear)
You can see that both aligment marks are about equal distance(angle) to the cams. Hope these can do some help to you.
English is too hard to an old Oriental.(slot = your line mark)
2.The cam gear with dot and slot is for the other cylinder (intake and exchaust are revesed comparing to a reqular single cylinder engine),
and use the slot to align with crankshaft when this cylinder at TDC.(forget about the dot on this cam gear)
You can see that both aligment marks are about equal distance(angle) to the cams. Hope these can do some help to you.
English is too hard to an old Oriental.(slot = your line mark)
#16
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
Tanks hyltaiwan and w8ye.
I think you just saved me A LOT OF GRIEF. And many many hours of fiddling around, getting it right.
Good grief !
From one Old Fart to Another;
This is a clandestine operation!!!
I think you just saved me A LOT OF GRIEF. And many many hours of fiddling around, getting it right.
Good grief !
ORIGINAL: Old Fart
Hmmm i still reckon we need the details..like why the engine is being pulled apart
Hmmm i still reckon we need the details..like why the engine is being pulled apart
This is a clandestine operation!!!
#18
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
I am still waiting for the crankshaft. It is on its way, but has to pass through uncountable customs and sort facilities first.
I got the "old" crankshaft out.
5 minutes in the oven at 150 deg celcius (300 degrees Farenheit), took it out, and gave it a solid kick with a rubber hammer.
It popped straight out. Very happy so far.
I got the "old" crankshaft out.
5 minutes in the oven at 150 deg celcius (300 degrees Farenheit), took it out, and gave it a solid kick with a rubber hammer.
It popped straight out. Very happy so far.
#19
RE: Saito FG-57 Cam gear positioning; How to do?
No we are not happy it just got back together,and it is'nt,WE need the gossip w8 sir.At first i thought kwik might have left the oil out of the petroil mix,a new crankshaft raises lots of other interesting possiblities.If i've got the right guy he has some brilliant u tube vids posted with a fg57 in a f4u corsair,shame about the plane then.
#21
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
w8ye,
I got the new crank-shaft into place, and the two cams. All well so far.
I bought two new conrods too.
I put a drop of oil on the shaft, before carefully trying to tighten the two conrods into place on the crankshaft.
When doing it, I tried to carefully tighten the two conrod bolts.
When they are tightened, I cannot turn the shaft by hand anymore. The conrods seems to tighten too hard around the shaft.
My sense of logic tells me this isnt right.
The part I ordered from Hobbyplastic in the UK is called SAI300T10C.
It was on backorder at Advantage Hobby, but I checked the part number before ordering at Hobbyplastic;
http://www.advantagehobby.com/73852/SAI300T10C/
I got the new crank-shaft into place, and the two cams. All well so far.
I bought two new conrods too.
I put a drop of oil on the shaft, before carefully trying to tighten the two conrods into place on the crankshaft.
When doing it, I tried to carefully tighten the two conrod bolts.
When they are tightened, I cannot turn the shaft by hand anymore. The conrods seems to tighten too hard around the shaft.
My sense of logic tells me this isnt right.
The part I ordered from Hobbyplastic in the UK is called SAI300T10C.
It was on backorder at Advantage Hobby, but I checked the part number before ordering at Hobbyplastic;
http://www.advantagehobby.com/73852/SAI300T10C/
#22
RE: Saito FG-57 Cam gear positioning; How to do?
Does'nt sound to good friend,you ordered rods too? I hav'nt heard or read anywhere of saito making different rods for the fg57.In old automotive terms it sounds like your big end shells are a couple of thou to big.From memory those rods are reckoned to be top quality re materials and treatment.Is there any swarf/galling apparent on the crankshaft journals?..you probably won't be able to send the part back now as it's effectively now 'used'.Last resort would be machining the aluminium big end inside diameter???
Ahem... i'd be reluctant to use such a coarse expression as the word "BACKFIRE" here but your engine has'nt just had a shaft run has it...??
Ahem... i'd be reluctant to use such a coarse expression as the word "BACKFIRE" here but your engine has'nt just had a shaft run has it...??
#23
Thread Starter
RE: Saito FG-57 Cam gear positioning; How to do?
ORIGINAL: Old Fart
your engine has'nt just had a shaft run has it...??
your engine has'nt just had a shaft run has it...??
Maybe a piece of paper between the two parts, just to avid them clamping too hard around the shaft ?
I think the reason for it all ( one of the conrods broke in exactly this area ) was as follows;
-When the ignition broke, I ordered a new ignition. Then I got a new ignition but for a sensor just like the big sensor used on
FG-36.
-When I got the wrong ignition, it was in the top flying season, I wanted to fly the Corsair...but the weeks went by.....I took a sensor
from my FG-36 and tried it on the FG-57.
-I did not know at the time that the FG-36 sensor-type ignition is adjusted to spark at top dead center, not at 28 degrees.
-I started it up, it run fine at idle, but at max it spitted a lot of smoke and noise and stopped.
I think that was what damaged it.
#24
RE: Saito FG-57 Cam gear positioning; How to do?
Sorry mate what i meant was did it throw a prop and rev it's nuts off quickly,or did you do a high speed low pass and clip the ground with the prop.
Did'nt think you would try another ignition and sorry to hear about your expense and the angst that goes with it.Post another vid please when it's flying again and the pain has receded a bit.
Did'nt think you would try another ignition and sorry to hear about your expense and the angst that goes with it.Post another vid please when it's flying again and the pain has receded a bit.
#25
Senior Member
RE: Saito FG-57 Cam gear positioning; How to do?
ORIGINAL: kwik
w8ye,
I got the new crank-shaft into place, and the two cams. All well so far.
I bought two new conrods too.
I put a drop of oil on the shaft, before carefully trying to tighten the two conrods into place on the crankshaft.
When doing it, I tried to carefully tighten the two conrod bolts.
When they are tightened, I cannot turn the shaft by hand anymore. The conrods seems to tighten too hard around the shaft.
My sense of logic tells me this isnt right.
The part I ordered from Hobbyplastic in the UK is called SAI300T10C.
It was on backorder at Advantage Hobby, but I checked the part number before ordering at Hobbyplastic;
http://www.advantagehobby.com/73852/SAI300T10C/
w8ye,
I got the new crank-shaft into place, and the two cams. All well so far.
I bought two new conrods too.
I put a drop of oil on the shaft, before carefully trying to tighten the two conrods into place on the crankshaft.
When doing it, I tried to carefully tighten the two conrod bolts.
When they are tightened, I cannot turn the shaft by hand anymore. The conrods seems to tighten too hard around the shaft.
My sense of logic tells me this isnt right.
The part I ordered from Hobbyplastic in the UK is called SAI300T10C.
It was on backorder at Advantage Hobby, but I checked the part number before ordering at Hobbyplastic;
http://www.advantagehobby.com/73852/SAI300T10C/
You have the correct rods, the only difference between the 300T & FG57 bottom end is the locating pin hole in the crank for the prop hub.
You didn't get the caps mixed up or turned 180° did you?