That stop mechanism works on a slide. Are you sure it's not froze up?

Old Magnet, approximately how far should it travel when it is sliding properly? I don’t think it is sliding (I’ve got the governor buttoned up right now since we’re expecting rain so I can’t check it). I know it would wiggle a tiny bit and the spring doesn’t have any tension on it. Thanks!

Hi,
maybe these scans from any U series D2, D4, or D6 can help.
The lever/shaft with the slot and key system should turn and and allow the spring loaded stop detent to be flipped down from where your pix show it is now--I can see you are not able to turn it far enough and hence the smaller gap pictured.

A thought is that one of the Governor weights may have flipped down out of position, when in the shut off position, due to wear or if the thrust bearing or governor shaft front ball bearing collapsed.

Keep asking questions and we should get you there a step at a time.
Cheers,
Eddie B.

The tab that your stop lever is resting on is the idle stop.

As pictured the stop lever is above the idle stop in the shutdown position.

For fuel on, the throttle lever rotates the crank you have removed COUNTER CLOCKWISE and the stop lever there pushes on that stop tab. It rotates CLOCKWISE on a pin in the stop/low idle assembly and rolls the upper end of that vertical hooked spring to the right over center, keeping the stop tab flipped down. The upper section of that rotating stop ends up protruding horizontally to the right with the tip of the stop lever below it. This means that you use the adjusting screw to move the stop assembly downward to increase the low idle speed

I think the small rotating idle stop is stuck on its pivot. Should be able to spray the pivot and the spring hook and it’s anchor point with something and pry the stop around clockwise and then back a few times until the stop lever will flip it without putting things under too much strain.

doggman, Where are you located in the Ozarks? I'm in the Fort Leonard Wood Area. I just finished with the governor on a 1V2496 D318 out of a DW10 I am putting in a 5R D6. it was frozen up and wouldn't move plus it had a bearing that was bad. The DW10 governor is not the same as the 9U governor but they are similar. Maybe I could help depending on where you are located if you would like. I've got a book on the D318 Motor which has a section on the governor for operation and adjustments. Brian Boaz, Saint Robert, MO

Thanks guys for the tips. They are helpful since the Cat manuals cover disassembly and reassembly but not much on troubleshooting. I’m thinking something is stuck since this happened when the throttle was hit into the stop position.

It’s raining again here again so it’ll be a couple of days before I get back into the governor. I’ve got a shop building with lean-to wings but it’s a little hard to maneuver an inoperative crawler into place - even with the blade chained up. But it sure would be nice to have her under cover right now.

Brian,the tractor is near Bunker, about 2 hours SE of you. I appreciate your offer especially since you’ve just been through a 318 even if the DW10 governor is a little different. I’ll get back into mine in the beginning of the week and see how it goes.

I opened up the governor again and nothing looked amiss.

However, the longer I poked around and went through the manual it suddenly occurred to me that the main governor spring might have jumped down a couple of “threads” on the link. It seems to me that the top of the spring should be at the top of the “threads” on the “link”. (The 318 parts manual just lists the spring and link as the “governor spring assembly” It looks like about 7/8” of the bottom of the spring is hanging below the bottom of the link.

What do you think?

That's the way they are from the factory, the spring and latch you need to check is ahead of that spring, check the latch at the top that it hasn't flopped over the wrong side of the other link or adjustment bolt.

Hi Team,
some time back someone kindly put up this array of different application D315-8 Gov. Springs.
I offer them by way of showing the different factory set positions depending upon application of the engine the spring is fitted to.
I believe at times the pix in the Service Manuals or Parts Books are just representative of the governor in general and not the actual in use for your unit.
Cheers,
Eddie B.

Eddie, Thanks for the photos. I guess the spring can be set many many ways depending on the application.

I think the stop on the shut-off assembly somehow rotated counter clockwise and the spring is now left of the stop pivot instead of right. I’m not sure how I’ll get it back on the other side but I’ll check it out this afternoon.