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Joe Black

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    Fort Meade, FL

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    Rust!

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    http://www.antiquecaterpillar.org

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  1. Only at low idle does it lope and while driving I'll just put a little pressure on the pedal to bring it up a couple hundred RPM and smoothes right out. The 8V71 in my Transtar does the same thing and it supposedly has a rack damper similar to what I'm familiar with on the Mercedes OM616/OM617. Fortunately the Mack has a throttle lock so when idling while parked I can just use that but it's just one of those things I'd like to fix, like the tranny issue.
  2. Got another question on our '86 MS200 with the Renault engine for the gurus here. ;-) At idle it'll lope often and in my experience with other diesels it's usually a worn rack damper. Is it a similar situation with this engine? Interested to hear if others have encountered and corrected the same issue. Thanks!
  3. Thanks Rob, at least that gives me an alternative as I never know what I'll come across. Part of the fun of being in the antique equipment/tractor hobby is all the wonderful people you meet and all the junk they have to trade with, lol! Here's a shot from yesterday after our mowing day getting the Florida Flywheelers show grounds ready for the show season, and in the background is the other Midliner (1994) I got for title/parts.
  4. Oops! I lied on RPM/MPH, turns out it's about 2700 - 2800 for 55MPH with the accelerator floored. Question on the tranny: Is it okay to keep driving it until I can do the rebuild? Put about another 100 miles on it today pulling my equipment trailer around and will put about 30 on it tomorrow, but don't want to make it worse than it already is. Also, if there are any suitable substitutes for the CM5852 let me know as I come across stuff all the time. Thanks all!
  5. Thanks Rob, feelin' the love! As a collector of antique and unusual machinery it's pretty much par for the course, but just one of those things I'm not looking forward to as I've never torn into a tranny before. I know once I do it I'll be thinkin' "That's it? Easy!" but I just gotta first get motivated to pull it, lol.
  6. This just keeps getting better and better. Was hoping to just be able to pull the top cover and find a shift fork in need of replacing.
  7. UPDATE: Drove the truck Monday about 150 miles and noted the following - Transmission shifts smoothly into 5th but will immediately "pop out" under acceleration, you can hold it in gear but the harder the acceleration the more difficult it is to hold. When coasting you can feel the shifter "pull" back into gear but as soon as you give it some pedal then out it comes. Made the run in 4th gear and the 2-speed rear in high which gave 55MPH and the pedal floored, approximately 3200 - 3300RPM on the tach. Did an oil and filter change before the run, now just need to finish servicing the rest of the fluids! While I have service manuals I do not have any owner/operator manuals so would appreciate suggestions as to what coolant and ration to use when servicing. There's also a coolant filter. Thanks! Joe
  8. Any suggestions for sourcing a rebuild kit? I found one but it covers CM 50 and 55, not sure if that's a series that includes the CM5852A or a different trans. I like to get all the pieces together before the mayhem begins!
  9. D'oh! I'm one of those gear floaters! Comes from learnin' on an RT915 I reckon... I'll, ummmm, try that clutchin' thing you suggest and see how it works out! If need be I guess I could pull the 6-speed outta the '92 Midliner and put it in the '86 until the rebuild is done, then again I might like that even more with the 2-speed rear! The '92 truck has about 500K on it though and is pretty sloppy. Coming down a long grade you'll get to the bottom and find it's come outta 6th, lol! So I learned to keep a hand on the shifter when going downhill. Thanks for all the great info, I'll keep y'all informed of progress! - Joe
  10. Don't know about Roosters, usually just pass through Zolfo to Arcadia or cuttin' over to Sebring. I grew up between Winter Haven and Bartow and have mostly been in the area ever since, middle of everything lol! I've seen a few used trannies, no CM's yet, but started wondering what else would fit. Could get a sweet deal on an RT910, that'd be interesting with the 2-speed rear... Thanks for the rebuild info Rob, I also got all the original Mack service manuals with the truck too, 5 big Mack binders with all kinds of manuals including tranny. It just kills me that every gear shifts and works fine and smooth, except 5th. Grrrr... At least with the 2-speed rear I can still get down the road at 60MPH so I can at least get some use out of the truck until fixin' the 5th issue! Thanks all for the input, I'll keep y'all informed especially when I start fabbing up the tilt-tray! - Joe
  11. This was one of two trucks that literally sat idle almost since the day they were new until they were both sold for $250 each to a couple employees from a state agency, one of which is a friend who purchased just for the 26' box. I paid him what he paid for the truck and drove it home after helping get the box off for him to use as storage. I've had it a number of years without anything on the chassis parked in the open here in central FL, it used to look much better but the sun isn't kind over time. I've seen the other truck and it had about 7K miles on it, so neither saw much use at the agency. Kinda one of those deals where someone had a great idea, spent some taxpayer money on it and it never went anywhere and it became something of a boondoggle they got tired of being reminded about. Especially after a new transportation manager came along and had both trucks fully serviced before someone could fill him in!
  12. Wow, they've must've really abused this garage queen in the few miles it managed to get on the road. Crap.
  13. Greetings all! Newbie to the forum here so apologies if this info posted elsewhere as search didn't find me an answer. Basically I've got a couple Midliners, 1986 and 1992, but the '86 transmission won't stay in 5th gear as it will "pop out" as soon as you release pressure on the shifter. You could hold it in with some effort, sometimes a LOT of effort! The small linkage on the tranny, with rod ends both ends attaches shift linkage to tranny, I replaced with new parts as the original was deteriorated and sloppy, but this made no imporvement. Could this be adjustment? Even though this is an '86 it has just under 5000 miles (former state agency truck) and I'm building out as a tilt-tray for farm and hobby use. Thanks for any info y'all can provide! I'll see if I can post a couple pics of the tranny...
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