Low oil pressure sender on HD6G

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   While im waiting for my manuals, or a posted wiring diagram i was wondering if anyone knew where the output of the low oil pressure swich goes. 

This switch is mounted on a T that screws in right at the oil pressure gauge. The switch is round with two screw terminals on the top. One of the terminals is connected to power(negative side of batttery) and the other terminal is connected to a wire that descends toward the engine compartment where it terminates with a buch of rat bite marks. No sign of the other side of the wire. I assume the rat took it   

Does the switch cause a valve to cut fuel to the motor? If so i assume its bypassed durring cranking? Or is there a flapper valve to cut off air? Or perhaps just a horn of some type?

Leo

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Leop Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 03 Dec 2018 Location: California Points: 161	Post Options Post Reply Quote Leop Report Post Thanks(0) Quote Reply Topic: Low oil pressure sender on HD6G Posted: 29 Dec 2018 at 10:36pm
	While im waiting for my manuals, or a posted wiring diagram i was wondering if anyone knew where the output of the low oil pressure swich goes. This switch is mounted on a T that screws in right at the oil pressure gauge. The switch is round with two screw terminals on the top. One of the terminals is connected to power(negative side of batttery) and the other terminal is connected to a wire that descends toward the engine compartment where it terminates with a buch of rat bite marks. No sign of the other side of the wire. I assume the rat took it Does the switch cause a valve to cut fuel to the motor? If so i assume its bypassed durring cranking? Or is there a flapper valve to cut off air? Or perhaps just a horn of some type? Leo

Sponsored Links

AC Mel Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 23 Jan 2010 Location: N.Ca. Points: 1186	Post Options Post Reply Quote AC Mel Report Post Thanks(0) Quote Reply Posted: 29 Dec 2018 at 11:11pm
	Leo..Can you post some pictures? Do you know the serial #? or year model? Not sure but the oil pressure switch is probably the one that activates the charging system...nothing to do with the fuel system. Fuel system should be a manual shut off.

Leop Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 03 Dec 2018 Location: California Points: 161	Post Options Post Reply Quote Leop Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 1:03am
	Sure, in the morning ill take some pictures. Where can i find the serial number?

AC Mel Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 23 Jan 2010 Location: N.Ca. Points: 1186	Post Options Post Reply Quote AC Mel Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 9:55am
	Serial # could be on a plate on the dash below all the gauges....if it hasen't been removed. Is also stamped into the right rear side of the case below the bottom of the fuel tank...that one has not been removed...but may or may not be visible depending if there is an attachment..winch or rippers etc. If there is nothing on the back it should be easy to find

Leop Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 03 Dec 2018 Location: California Points: 161	Post Options Post Reply Quote Leop Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 12:49pm
	Hi Mel, Can you tell me more about this charging system? I have never heard of a charging system that's gated by oil pressure. Did it simply delay charging until the motor was up and running? Did it disconnect the batteries through a relay to prevent them discharging by back feeding through the generator? Was it a direct tap to tell the regulator actual voltage at the batteries so as to prevent the voltage regulator from being fooled by voltage drop across the high current wiring? Was it for sourcing power for an excitaion voltage to the generator? No one has posted a wiring diagram yet, so need to wing wiring "her" today on my own and it would be nice to know what that darn wire does, or more accurately stated, used to do? Note to gals and the PC crowd. I have decide the tractor is a her because it did not come with a manual or directions, same as my wife

Jim.ME Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 19 Nov 2016 Location: Maine Points: 962	Post Options Post Reply Quote Jim.ME Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 1:39pm
	The switch on the tee at the back of the oil gauge is to operate the hourmeter. You can view the parts book on line at www.Minnpar.com. Click on parts books, select crawler loaders, then Allis and Fiat, You should find the 6G parts book there. Looks like you may want to have your serial number in hand.

Leop Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 03 Dec 2018 Location: California Points: 161	Post Options Post Reply Quote Leop Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 1:48pm
	Jim, you are a God. My wife thinks so too, as does the propane man.

Leop Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 03 Dec 2018 Location: California Points: 161	Post Options Post Reply Quote Leop Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 2:19pm
	Jim, You are still a god, but the link seems to show a teaser manual. Pages 1-6 and then jumps to page 66 and the cuts off a few pages later. Am i looking at the right manual. It says "service manual" on the cover, and you said "parts manual" in you post so im thinking i might have gotten it wrong.

Leop Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 03 Dec 2018 Location: California Points: 161	Post Options Post Reply Quote Leop Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 2:26pm
	Never mind Jim. I found the right parts book now. Thanks again. Sincerely, Leo

Jim.ME Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 19 Nov 2016 Location: Maine Points: 962	Post Options Post Reply Quote Jim.ME Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 2:44pm
	I believe you will have to purchase a service manual unless someone has one they chose to give you. There are not many free, downloadable service or operator manuals for most equipment.

Ray54 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 22 Nov 2009 Location: Paso Robles, Ca Points: 4723	Post Options Post Reply Quote Ray54 Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 9:11pm
	If you can get to a parts book on line check and see if it was not a generator rather than alternator when new. If it started with a alternator it could be part of that,because older alternators needed to be excited to get them charging. Running power to a oil pressure switch "automated the system", to get it started and not having a switch to close to keep from draining batteries when not running.

Jim.ME Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 19 Nov 2016 Location: Maine Points: 962	Post Options Post Reply Quote Jim.ME Report Post Thanks(0) Quote Reply Posted: 30 Dec 2018 at 9:23pm
	Parts book shows the switch is for the hourmeter. Original equipment appears to be 24 volt generators in the parts book, when checked against the Delco numbers.