I had similar problem with Massey Ferguson 165. Solenoid would click but not engage the starter. You may have to try numerous times before it would engage the starter to turn the engine. The problem is that there is not enough power going through the solenoid to engage starter. The solution is to wire a relay into the starter circuit. It’s not that difficult. It’s an known design problem which appears on older tractors/diesel engines. Here’s a link to it on another forum reply #18.
https://www.tractorbynet.com/forums/kubo...
I bought a generic relay and wired it myself. see link for part on amazon.
https://www.amazon.co.uk/gp/product/B07X...
Red to power line into starter(30), Black to earth (85), white (86) to ignition switch and blue(87) to original cable on ignition switch to solenoid.
I had spare spade on the power line from the starter on the ignition switch so I wired power from there. The white and blue cables go between ignition switch and existing solenoid cable.
Starter engages first time now without any issues
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1984 Long 360
crwdns2934271:0crwdnd2934271:0 cayte03 crwdne2934271:0
cayte03 remove your starter but keep it connected. Just remove the battery cable. Once removed replace the battery cables and see if your starter behaves normal. The bendix should engage and the starter should turn over. Let us know what you find. It is a power situation and your starter may just draw to much from the battery. Also, when you boosted your tractor, did you use the "new" battery directly on the starting circuit or did you connect it to the "old" battery?
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Oddly enough most people think a 12 v battery should read 12 v but this is not the case. Led batteries are nominal 13.8 v and if even a small charge higher to 14 volts. At 13.4 I would say you have a dead cell and reading your text sort of proves it. A battery shop have a tester that puts a load on a battery to see how the voltage stays or drops under load. They will tell you.
Good luck
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