(800) 853-2651
SHOP NOW

JD 520 won't stay running

A

Anonymous-0

Well-known Member
I have an old 2 cyl. JD 520, that has been kept in very good shape. However, the other day my son ran out of gas while disking the garden. He added more gas, but it wouldn't start. It seemed hot - and there was a little smoke coming out of the left side - cover over flywheel/starter area. I let it cool down - now it starts right up - but shuts off as soon as I take my foot off of the starter pedal.
Any ideas?
 

NO JD 520 should EVER get (or be) OLD..!!
They are too nice to operate...if it IS "Old", it is time to make it "Young Again"...!!!
You need to see an Electric wiring Diagram to actually see and correct the problem..
There is a Resistor behind the instrument (Dash) that is to Reduce Operating Voltage to the ignition points (While Running)..AND:
A "Bypass" circuit that let's FULL Battery Voltage to the Ignition Points when then the Starter is engaged...
That is where your problem lies..
For TEMP. (Emergency), you can run a Jumper from the Battery, to the Coil..to get it to run and move it for repairs..just be SURE to Remove the Jumper when you turn the engine OFF...
Ron..
 

NO JD 520 should EVER get (or be) OLD..!!
They are too nice to operate...if it IS "Old", it is time to make it "Young Again"...!!!
You need to see an Electric wiring Diagram to actually see and correct the problem..
There is a Resistor behind the instrument (Dash) that is to Reduce Operating Voltage to the ignition points (While Running)..AND:
A "Bypass" circuit that let's FULL Battery Voltage to the Ignition Points when then the Starter is engaged...
That is where your problem lies..
For TEMP. (Emergency), you can run a Jumper from the Battery, to the Coil..to get it to run and move it for repairs..just be SURE to Remove the Jumper when you turn the engine OFF...
Ron..
 
Those old tractors have an automatic fuel shutoff in the sediment bowl apparatus. If you run them dry you must loosen the knurled nut on the top of the sediment bowl and hold it down for 30 seconds or so until the carb fills with gas. Your second problem sounds like the resistor has gone bad in the ignition circuit. I believe they start on 12 volts and run on 6 volts, they die after releasing the starter pedal because the ignition circuit is broken if the resistor is burned out. Joe
 
If it runs as long as the starter pedal is depressed but NOT when its released, the ignition ballast resistor located between the Ign switch and coil is bad/open or else the wiring is bad/open. The resistor should have continuity and be around 1.2 to 2 or so ohms, easy to check and replace. If it has the auto shut off fuel sediment bowl assembly and she runs out of gas loosen the top knurled nut and depress the plunger till the bowl fills with gas again.

John T
 
You must log in or register to reply here.

Similar threads

H
JD 520
Replies
8
Views
735
caterpillar guy
C
I
more JD 2020 questions
Replies
14
Views
921
BillCinNY
B
D
1999 F250 SD - starter keeps running
2
Replies
21
Views
728
dhermesc
D
H
MF20 starts but won't stay running
Replies
10
Views
1K
hershwork
H
M
Running Rough and I'm out of Ideas
Replies
17
Views
1K
Mnethercutt
M
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