TRACTOR PARTS Allis Chalmers Case & David Brown Farmall & International Ferguson Ford & New Holland John Deere Massey Ferguson Massey Harris Minneapolis Moline Oliver & Cockshutt Kubota / Yanmar

TRACTOR MANUALS

Allis Chalmers	Case	Farmall IH	Ford 8N,9N,2N	Ford
Ferguson	John Deere	Massey Ferguson	Minn. Moline	Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Tool Talk Discussion Forum

how to test the mag relay?

[Show Entire Topic]

Welcome Guest, Log in or Register

Author

truck

12-24-2004 11:43:41

Report to Moderator

I've already replaced head gaskets twice, but I think next time it will be Teflon..Really kills performance when the web splits out. Still have the original hanging on the garage door from back in 94 when it blew.

How do you test the magnetic starter? I can wire a house no problem but I don't understand these things and haven't found a book to follow. I did the capacitors as they had an obvious problem and I got lucky last time. Now it has power to everything that should but no go. I tried to manually trip the starter but that didn't work.

Sure is a serious machine. I bet it would outpump any t-30 IR 7HP unit on the market today, and they seem to be the best out there.Kinda reminds me of a two cylinder JD with the size of that first stage piston!
Thanks for the website help.
Truck

[Log in to Reply] [No Email]

DaveCA

12-24-2004 20:45:22

Report to Moderator

Re: how to test the mag relay? in reply to truck, 12-24-2004 11:43:41

Assuming you have a "motor starter":
For a stand-alone compressor, a motor starter combines a contactor (load circuit switch) with a set of thermal overload sensors on each load phase, on modern starters. The thermal O/L"s operate a contact which is part of the series of control devices for the coil which operates the load circuit contactor (in the starter) to thet motor. The control circuit includes the contactor actuator coil, the O/L"s, a pressure switch and perhaps an on/off switch or on/off switch pair for your compressor..
If you are mechanically closing the load side contacts, there is an open somwhere in the load circuit, if the motor is good and it doesn"t run.
Can you hear the contactor closing?
Is test V at the line side of starter correct?
Is test V at load side of starter the same?
Are the O/L"s tripped?
Does the control circuit coil in the starter have power to operate it at it"s terminals?
If the control side operates the contactor, then...
Check for V drop in power circuit.. The voltage should read the same (on all phases) at the line and load side of the starter with the contacts closed?

[Log in to Reply] [No Email]

[Show Entire Topic] [Options] [Printer Friendly] [Posting Help] [Return to Forum] [Log in to Reply]

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. [ About Us ]

Home | Forums

Copyright © 1997-2023 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