(800) 853-2651
SHOP NOW

Farmall 450 Gas timing question.

T

Tony_Idaho

Member
Hello,
I just recently had some issues with my tractor, started backfiring and stuff, in an older post a few days ago. Looks like replacing the condenser and cleaning the fuel filter did the trick, or so I thought... I haven't really put it under any type of load, like baling my pasture to make 100% sure.

I decided to put a timing light on it. Had it hooked up to the front spark plug, closest to the radiator. I can see the notch on the pully pretty near the little pointer on the engine, but... the notch moves around. Probably about 1/2 inch or so.

Is this the cam that could be broken that goes to the distributor(also from one suggestion from my other post)? Or is this normal? Like I said, it seems to run pretty smooth now, I just didn't drive it too much yet, maybe 15min...

Thanks
Tony
 
If it is jumping around First check for a loose rotor as it SHOULD FIT the shaft tightly , next take a good look at your points. IF they are pitted then replace them , Next is to check the condition of the centrif. advance springs in the dist. If they are loose or broken then ya got a problem and this needs fixed . Once ya have checked all that and fixed any problems there then see how it does.
 
can also be a shot distributor shaft. If you can move the shaft that holds the rotor on a "go$od" deal that can cause your timing to jump as well. $50 buck bushing from CNH...

Andrew
 
Tony - Timing notch "dancing" a half inch around the pointer is a bit excessive. The most likely cause is worn distributor shaft bushings.

Remove the rotor button and check the shaft for radial runout (side to side play). If the runout's more than a couple thousandths it's time to rebush the distributor.

A busted cam gear hub can cause timing variations too. But this is usually accompanied by general poor running; also sometimes by an ominous knock from the right front of the engine.
 
OK, let me add a little more, now that you all have sparked (no pun intended) some memories.

When I had the Distributor Cap off and was putting on the new rotor, I could pull the shaft that the rotor goes on out a bit, i would say 1/4 of an inch of play. When I put the rotor on, I could also rotate the shaft a bit., guessing the metal tip of the rotor rotated about 1/4 of an inch.

I was just thinking this was the way an old machine worked, now I guess I am wrong on that....

Tony
 
Remember i am not there checking it out and if it was here that dist. would be off the tractor and on the strobe then i would know if it was or was not the problem and a 50 dollar bushing yea wright it would be a three dollar bushing and ten min. on the lathe .
 
I agree with you, about taking the Distributor off. Unfortunately, I am usually in the field 42 miles away from my house. So it is usually an in the field operation. I think I might get her loaded up and bring her back home and start looking better.

I usually ask a lot of questions, cause I know I will have them once I am out there in the field. And I usually don't have a lot of answers for me.. :)

So I really appreciate all the responses about what to look for, and how to do it.

Thanks
Tony
 
that is ok, side movement is a bad thing. In and out
is normal, and the twist you feel is the advance
springs. They can be a tricky critter to get them
nailed downed sometimes. Check what vet and bob say
to do and myself then go from there.


Andrew
 
Tony - The 1/4" rotation movement is normal. More specifically you should be able to turn the rotor button about 15 deg CLOCKWISE against light spring pressure; it should then return when let go.

If it does not spring back the centrifugal advance mechanism beneath the breaker plate needs attention.

The in-out play you observe is pretty much normal.
 
You must log in or register to reply here.

Similar threads

K
Float? Farmall 450 Hydraulics
Replies
3
Views
171
Brendon-KS
Brendon-KS
L
450 carburetor
Replies
4
Views
325
Lynerd
L
M
IH350U fan Pulley Timing marks.
Replies
6
Views
208
13fx
1
R
H magneto no spark after tune
Replies
12
Views
299
560Dennis
560Dennis
M
IH350U-C175 crankshaft pulley.
Replies
5
Views
178
13fx
1
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top