Yesterday's Tractor Co. Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
Crawlers, Dozers, Loaders & Backhoes Discussion Forum

kubota mini-ex elecrical system

Welcome Guest, Log in or Register
Author  [Modern View]

05-29-2012 15:38:49

Report to Moderator

My KH65 was running fine this morning, shut it off and when I went to restart it the electrical system was completely dead. No power to the ignition switch, the fuse panel or the batt post of the alternator. I "back doored" it by running a jumper wire to the fuse panel, this energized the whole system and it runs and everything has juice (15.5-16 volts...yikes!). When I turn the key off and back on the system is dead again until I back door it again. Ditto if I leave the key on and kill it with the throttle and want to restart it. Is there a master fuse? A wiring diagram would be nice, but I can't find any such thing. Help!

[Log in to Reply]   [No Email]

06-01-2012 18:54:25

Report to Moderator
 Re: kubota mini-ex elecrical system in reply to wilko, 05-29-2012 15:38:49  
You are dead on the original link was 50am . The breaker out of (or Like used on) larger semi trucks works well. You may not have anything ecxcept that worn connector. The KH series are all 20 + years old getting some age on it. Sold a world of the KH 38s they were great hoes. If you get a chance sit in the seat of one of the pilot oprated newer ones. Just unbleviable how the hydraulics have changed. Current model KUBOTA parts drawings are avl at but nothing on the older stuff.

[Log in to Reply]  [No Email]

06-01-2012 19:44:25

Report to Moderator
 Re: kubota mini-ex elecrical system in reply to jm., 06-01-2012 18:54:25  
I've got a Hitachi 120 ser3, so getting used to the old hydraulics on the Kubota is going to be tough. Wish I could switch it to pilot control but that's probably not feasible. I found a shop manual on CD out of Canada for cheap. I'll probably order it. I hate doing electrical without schematics.

[Log in to Reply]  [No Email]

05-30-2012 19:47:31

Report to Moderator
 Re: kubota mini-ex elecrical system in reply to wilko, 05-29-2012 15:38:49  
Figured it out. It had a fusible link poking out of the harness just below the alternator. It wasn't blown, the connectors had rotted away. It's such a pain to get to, I think I'll just replace it with a maxi-fuse in an easy to get to location.
What size fuse would you recommend for 10 ga. wire?

[Log in to Reply]  [No Email]

05-30-2012 21:09:24

Report to Moderator
 Re: kubota mini-ex elecrical system in reply to wilko, 05-30-2012 19:47:31  
Glad to hear you figured out the problem and thanks for posting what you found. Working on equipment for a living I always like to know what the cause of a problem is because I never know when I might run into the same situation myself at some point in the future.

[Log in to Reply]  [No Email]

05-30-2012 19:59:42

Report to Moderator
 Re: kubota mini-ex elecrical system in reply to wilko, 05-30-2012 19:47:31  
Duh. Perhaps a 50A slow blow would be about right. I think I'll put it in the battery compartment. Thanks guys.

[Log in to Reply]  [No Email]

05-30-2012 14:42:49

Report to Moderator
 Re: kubota mini-ex elecrical system in reply to wilko, 05-29-2012 15:38:49  
I'm in the UK,all the Kubota's I come across usually have two 50 amp slow blow fuses in the battery compartment,they are usually red in colour,have a look in the battery box the US models maybe the same.


[Log in to Reply]  [No Email]

05-29-2012 21:55:54

Report to Moderator
 Re: kubota mini-ex elecrical system in reply to wilko, 05-29-2012 15:38:49  
If it has one of the "master switches" that is actuated by the key switch, it sounds to me like you've got a blown diode somewhere. Typically you've got a hot wire to the ignition switch, and a diode that allows just the coil on the master switch to ground until the ignition switch is turned to the on position. In the on position it powers the coil in the master switch pulling it in to ground the entire system.

One way to check to see it this is the problem is to pull a ground wire directly from the ground on the battery and use it as a ground to see if you have power at the hit wire going to the ignition switch. If you have power at the hot wire using the ground directly to the battery, but not to the machine's frame when the ignition switch is on, then it pretty much has to be a diode blown somewhere. The ones I've seen are usually made into a plug that simply plugs into a mating plug on the harness somewhere. Where though is anybodies guess without the manual as I've seen them everywhere from close to the switch itself to 'hidden' in the console beside the seat.

I've seen this problem on several different brands of equipment over the years and it may be the cause of your problem. Hopefully I've explained what to look for and/or check in a manner that you can understand. Unfortunately beyond throwing the idea out there I don't have a clue what else to tell you without being there to look at it.

[Log in to Reply]  [No Email]

05-30-2012 06:48:57

Report to Moderator
 Re: kubota mini-ex elecrical system in reply to NCWayne, 05-29-2012 21:55:54  
Thanks Wayne. When I checked for power, I had my multimeter grounded to the battery so I guess I'm okay on that. What about a fusible link or master breaker?

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

Home  |  Forums

Copyright © 1997-2018 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