Recently purchased a Massey 135 Diesel (1964 model?). None of the gauges work and after inspection, it looks like both wires going to each gauge has been cut. Why would this have been done. Looking suggestions and options if we should replace all gauges or can wiring only be replaced.
Jim.ME
Well-known Member
- Location
- central ME
Welcome to the forums.
The wires you are looking at may be for gauge back lighting.
A diesel MF 135 should have the following mechanical gauges: oil, temperature, and tachometer. The ammeter and fuel gauges were the only electrical ones. The ammeter is direct wired and the fuel gauge is supposed to be turned on and off by an oil pressure switch mount to a tee in the oil line at the back of the oil pressure gauge.
Below is a link to a MF 135 Operator's manual. the wiring diagrams for both gas and diesel are in it.
MF 135 Operator's manual
The wires you are looking at may be for gauge back lighting.
A diesel MF 135 should have the following mechanical gauges: oil, temperature, and tachometer. The ammeter and fuel gauges were the only electrical ones. The ammeter is direct wired and the fuel gauge is supposed to be turned on and off by an oil pressure switch mount to a tee in the oil line at the back of the oil pressure gauge.
Below is a link to a MF 135 Operator's manual. the wiring diagrams for both gas and diesel are in it.
MF 135 Operator's manual
used red MN
Well-known Member
- Location
- Coon Rapids, MN
Hello swadell, welcome to YT! If you are not familiar with tractor/automotive instrumentation what Jim means when he says “mechanical” in the case of the oil pressure gauge a tube connects the gauge to an external oil pressure tap on the engine. The gauge reads the pressure. The temperature gauge reads the engine temperature via a capillary tube and bulb that has captured fluid in it that expands when heated up, the expansion moves the gauge needle via pressure.
Last edited:
Both of your posts have been very helpful. Getting ready to pull it into the shop to start working on the gauges.
Ray,IN
Well-known Member
- Location
- S. Indiana
Replacement gauges are available on Amazon, but choose carefully.
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 © 1997-2025 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