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Hello from Virginia

2.3K views 9 replies 6 participants last post by  sdunt  
#1 ·
Hi folks, my name is Ed. It’s great to find this group.

So, I was just yesterday given a Case 646 bucket loader. That’s right, a freebie. Here’s the backstory.

I have a piece of property that was part of my family’s larger farm from I bought from my brother, who now owns the rest of the land. He doesn’t farm, and has let the bigger fields go back to nature as he has a government job. He bought a gray market Yanmar to bush hog two small fields, he gave me that about five years ago after he bought a new Kubota that had a a cab. That Yanmar was too big for anything I would need it for so I sold it. He had also bought the 646 used, as well as a new Ariens tiller with a Robin motor to use for his garden. He quickly decided that he could do everything with a new Kubota with a loader and tiller attachment so he traded the Kubota.

Yesterday, he asked me if I wanted either piece of equipment, probably feeling guilty because I’ve been spending my weekends trying to remediate bamboo his wife planted on my property when they lived there-over the septic drain field. Of course, a rototiller would be great, and it fired up on two pulls after draining ten year old fuel.

I was not familiar with the Case 646, so I looked at it an and thought ‘Could this critter possibly be useful ?’ I mean, it looks like a lawn mower on steroids, so I asked him how it runs. He said it starts great, but it only goes about 1mph.

I said I’d think about it, came home and found this group, and the many testimonies that this little guy is a beast, and well suited for exactly what I need: to remove about 18” of soil including the bamboo roots before isolating the area using aluminum panels.

From what I was able to gather on this website, this could be related to the banana plate. I don’t even know what that is, but I have rebuilt two Farmall cubs, so I figured I’d give it a closer look. Today, I went back over and took a bunch of junk off that he’d stacked on the machine. If my decoding is correct, it’s a 1979 model. The motor, which should be an Onan has been replaced with a 23Hp Briggs Vanguard.

That kind of threw me, but I looked up 646+ vanguard and see that they made a purpose built repower motor for this. The install appears to be professionally done, but I don’t really know what I’m looking at. One of the things that concern me is that the Vanguard retrofit says it’s a direct replacement for 74-76 , but if this is a 79 AND if the banana plate is the cause of its poor performance, how will this impact repairing the plate?

I’m also curious about the grille. Most machines I’ve seen have headlights. This one does not, were they an option?

Sorry to ask such questions but this is all new to me. Thank you for any enlightenment you could offer.
 
#2 ·
Welcome Winkangrin to the CCI forum. I must say I enjoyed your introduction. A repowered 646 should be a great machine to do your work that you described. The banana plate is a travel control plate under the GT that changes the direction from forward to reverse. It moves when you use the travel lever to the left of the steering wheel and is activated by the pedal to the right of the tower. When you push the pedal down it moves the spools in the travel control valve. There is an adjustment for them and it’s possible they just need adjustment. The repower has no bearing on the banana plate. You probably already found the manuals on the 646 in the manuals section. Some pics of your machine would be terrific. ✌ Harry
 
#3 ·
Welcome!

That is a heck of a machine for free. I wouldn't be afraid of the "problems" you describe. A repower is not a bad thing as long as it was done properly and it sounds like it has. The banana plate repair is something all of us loader owners end up doing at some point.

Updated and replacement parts are available though the dealers on this site.
 
#4 ·
Welcome aboard, I hope you find the forum enjoyable and informative.

Unlikely the repower would have any impact on the travel control system. The illustration at this link may assist you in understanding the travel control, or find the right complete parts manual in the tech section or at the link below.



As for the grille, it is likely a prior owner replaced the original grill. Headlights were standard, but yours seem to have been prior owner'd away.





Brian Hildreth
President
Salem Power Equipment, LLC
Plymouth, MI 48170
734-649-1781




www.salempwr.com
 
#5 ·
Welcome

Tips for newcomers...

Please go to your member profile and list your location. This helps when you want to price, sell, or buy something.

Detailed instructions can be found here --> https://casecoltingersoll.com/showthread.php/89291-How-to-add-location-to-your-profile

Please resist the temptation to 'Look with your mouth'. 👍
The search box is on the TOP of every page.


Please take the time to at least scan the titles of the Frequently Asked Questions before you ask one of them.

Visit the technical library and see what a wide range type of information is available there.
 
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#6 ·
Thank you for the encouraging responses!

I became very passionate about rebuilding and using older technology mostly out of need fifteen years ago. My property includes a three acre yard and a gravel driveway which goes 3/4 of a mile through mature hardwoods involving a corkscrew hill before arriving at our house. Box store lawn tractors had a lifespan of 2-3 years before they needed replacing, so I bought the first Cub with a woods belly mower. I got a good deal on a flail and grader blade, but because they are a PITA to switch implements, I acquired two other cubs. Keeping them running and working has been a learning curve, but the fact that they get up and go to work when needed at 65 years old is a testament to excellence of engineering.

I’m pretty excited about the 646 and it’s capabilities. Understanding this machine will be a learning curve as was the Farmall, and I thank everyone for their advice. I’m planning on spending the next few days reading service manuals and all posts on this forum to decide whether I want to attempt this if the adjustment doesn’t solve the issue or if I want to take it the local Case dealer. The need for the machine is pretty immediate because bamboo spreads incredibly fast.

I’ll get some pictures up next weekend when I get back down there.

Thanks again!
 
#7 ·
I'm sure it's not what you want to hear and some forum members may have a better experience ... but.

I expect your local Case (Ag or Construction) does not see a 644/646 with any regularity. Likely their staff has never actually seen one. Doesn't mean they aren't good techs, though. Make sure you get a repair timing commitment in advance ... I am routinely seeing 4-8 week queue's at shops around our area.

If you have basic mechanical abilities and can get under the tractor, then the TCV control repair is not too difficult.

Brian
 
#9 ·
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I spent last weekend doing a ton of things that took precedence over digging into this 646, but did have the opportunity to go by my brothers and take a closer look at the machine. I wanted to see for myself what the problem was, so I met my brother at the barn. He’d already started it for the first time in over a year, and it fired right up. It sucked in a mouse nest, which I believe caused it to surge. No big deal, my zero turn did the same thing, (no mouse nest just old gas and sitting). In that case, it was way cheaper to just replace the carb with a China carb than tear it down and clean it, but that doesn’t seem to be the case here, so it’s on my agenda for Saturday.

After doing some research, it appears that the vanguard was designed to be a direct drop in for 74-76 tractors. This is a 79, and while the install appears to be done well, I’m doubtful about it being a pro job.Either way, I’d like to try and figure out the specs for the motor, but there is no tag anywhere on motor that gives me the serial number, DOM, or B&S part number. So, I have some questions.

It doesn’t seem to be idling very fast. The throttle works, but it doesn’t seem like it’s got a ton of oomph to it. Of course, since its design is to move bucketfuls of earth, it may be spot on, I just don’t know.

The repower included the addition of an electric fan, and this explains where the headlights are. The entire grill was replaced with what appears to be pegboard painted black. A switch was installed on the dash to activate the fan. I’m wondering if this is a common addition or if perhaps there were other baffles designed for the Onan that had to be removed to accomodate the B&S. Obviously, more cooling is always a good thing in air cooled engines, but is this sufficient?

The choke operates as it should, so that’s good.

There’s a few things that make me think that this was not a pro install. Of course, a tech would have relocated the data tags to another location for future reference if the install would have obscured it is one. Then there’s the fact that he or she included a jury rigged shim which supports the muffler-made from aluminum strips folded accordion style. If it works, cool, but certainly not the best engineered solution.

Then, there’s the matter of what in the heck is this. Under the tractor on the right side, you’ll see a pic of a steel bar with a hole in it which had at one time a washer. Above it on the body of the tractor, above the running board, there are two holes. Im thinking possibly a brake, but I’ve not yet focused on that aspect until I get the motor sorted out. More importantly than what it is, I can look at the service manual to determine that, but why is it not there.

The hydraulics appear to be working well, at least the bucket goes up and down. I’ll actually take her for a spin after I get the carb and all sorted out.

Thanks for all advice, I appreciate it.
 
#10 ·
Regarding:

Then, there’s the matter of what in the heck is this. Under the tractor on the right side, you’ll see a pic of a steel bar with a hole in it which had at one time a washer. Above it on the body of the tractor, above the running board, there are two holes. Im thinking possibly a brake, but I’ve not yet focused on that aspect until I get the motor sorted out. More importantly than what it is, I can look at the service manual to determine that, but why is it not there.
The brackets hanging down are the "mid lift' it was originally intended and used for a mower deck or can be used with a 'Sleeve hitch' to provide lift for rear attachments. Since hardly anyone uses a mower deck on a LOADER I and several others just removed the entire mid lift.

The Holes above the foot pan were for the belt drive clutch control handle. The clutch would have been mounted on the front, flywheel side of the engine and was used to run a mower.. Again, no one uses it. the Repower pulled most if not all of that out it appears.

It is interesting that the engine is setting on a mounting bracket that is not standard to a 646B. AND, the bracket is painted to match the tractor. What you can figure out from that. NO clue.

That Napa filter hanging down on the right side of the tractor, I hope is a return side hydraulic filter.. Personally not real nuts about the steel to rubber hose connections. Those don't look like any kind of hose barb(ed) fittings, which might lead to the hoses slipping off.. Especially in the winter at startup as the oil might be cold and thicker.. The addition of the filter is a GOOD thing, I have done similar.:
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I have no information on the fan.. The 646 with standard Onan CCKa engine was supposed to move so much air via the engines cooling fan that an additional fan on the oil cooler was not needed. Personally I'm ont convinced of that.. I'd like to find a low current electric fan to add to my tractor.

The Case 644-646 (lower) Grill piece measures 18x10-1/2 and is made of .06" thick steel sheet that has about .090 holes in. Closest current stock material is McMaster-Carr

As for the headlight assembly Barneveld or someone might have a used one hanging around. It would not be terribly hard to fabricate it.:

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