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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Information on Crawler Reverser, Please

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Polk Crawler

12-01-2004 16:22:44




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What is a reverser and how does it work, or what is its function?

Thanks in advance for information.

PC




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Pete/ME

12-04-2004 03:30:46




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 Re: Information on Crawler Reverser, Please in reply to Polk Crawler, 12-01-2004 16:22:44  
Just wanted to pass on what happened to me. When I got my straight JD350 (which was pretty much junk) the reverser lever on the dash was frozen, the guy had been changing direction with the clutch and trans. for years. I pulled the floor plates and found that someone had crimped the control cable. I replaced it, and the reverser has been working fine ever since.



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R-Cubed

12-02-2004 10:26:51




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 Re: Information on Crawler Reverser, Please in reply to Polk Crawler, 12-01-2004 16:22:44  
We recently bought a JD350 loader and it had this feature. I didn't know it had it til we got it home and I got to test drive it. It is a small lever on the dash that will reverse your direction instantly without declutching. It in my opinion it should increase productivity 20% and save wear and tear on the transmission, best thing since bottled beer! I was under the impression that it worked like a model T Ford transmission with epicyclic gears hydraulically actuated. (more like a modern automatic tranny in a car) It is very smooth.

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Roy Suomi

12-01-2004 19:12:58




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 Re: Information on Crawler Reverser, Please in reply to Polk Crawler, 12-01-2004 16:22:44  
A direction reverser can be either a gear type that requires clutching between shifts. Or a hydraulic direction reverser that has 2 clutch packs in it for forward and reverse. You can select a comfortable gear in the main gearbox for conditions , then be able to change direction without clutching. most hydraulic units have a cushion or accumulator to soften direction changes.



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jdemaris

12-01-2004 20:16:15




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 Re: Information on Crawler Reverser, Please in reply to Roy Suomi, 12-01-2004 19:12:58  
A third type used in many older machines had clutch packs that were mechanically engaged and could be shifted between forward and reverse without clutching. Deere and Case had them as well as others - before they began to use the hydraulically engaged clutch packs.



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Lavoy

12-02-2004 07:40:56




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 Re: Information on Crawler Reverser, Please in reply to jdemaris, 12-01-2004 20:16:15  
If you go back far enough on the Deere"s, like 430/440 with the clutch type reversers, even though they were clutch type, you still need to use the engine clutch when shifting. If not, it will eventually tear the tabs off of the clutch discs. At $43/each, you don"t want to buy too many of them.
lavoy



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jdemaris

12-02-2004 11:37:01




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 Re: Information on Crawler Reverser, Please in reply to Lavoy, 12-02-2004 07:40:56  
Yeah, I wish I'd saved all the units that got thrown out years back. I converted quite a few 430/440s to direct drive for customers who had gotten fed up with the reversers coming apart. The old reverser parts all went to the scrapyard.



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Lavoy

12-02-2004 16:11:24




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 Re: Information on Crawler Reverser, Please in reply to jdemaris, 12-02-2004 11:37:01  
No kidding, the rear drive hub alone is like $500 new, and I am always getting calls for them used.
lavoy



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jdemaris

12-03-2004 06:07:06




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 Re: Information on Crawler Reverser, Please in reply to Lavoy, 12-02-2004 16:11:24  
Long parts story here. The last Deere dealership I worked at went out of business in 1989. Business was still good since we had Ag., Industrial, Forestry, and Lawn & Garden - all under one roof. But, the owner was an old-fashioned, ex-chicken farmer - business man. Deere company tried to bully him. They wanted him to invest a ton of new money and make separate sales buildings and shops for each franchise - i.e. a green Ag. store, and a yellow Industrial & forestry store, etc. And, funny thing is - we were the area leader in sales and service at the time. Anyway, he basically told Deere to "shove it", he was too old to be pushed around, and closed shop. Closed our doors in 89, and he died a few years later. On the subject of used parts, I had been saving discarded parts since the early 70s. I now get sick thinking about it. We'd have a brand new 4020 diesel engine blocks with a sand-casting flaws in them (easily repairable), Deere would warranty them, and we'd throw them out. We'd sometimes rebuild powershift transmissions with "module packs" and throw out all the old parts - good or not. We had a bunch of complete, new, Yanmar diesel engines that got scrapped. They had minor injection pump problems, but Deere/Yanmar chose to replace the entire engines under warranty. We had piles of good diesel cylinder heads that we discarded because the valve seats were getting too deep and there was nobody local that we trusted to install seat inserts. We had one mechanic (on the road) that was in the habit of replacing closed-center piston pumps without even testing. That is to say, if a machine had any sort of hydraulic problem, he'd replace the pump first, and if it still didn't work, he started looking for problems elsewhere. This resulted in a mountain of discarded hydraulic pumps behind our shop, some good used, some brand new. For the time, I was more apt to take the time to diagnose problems and fix only what was needed, where as some others were just parts replacers. There are arguments for both approaches. For years, I was stockpiling parts in two of my barns - until I had no more indoor storage. One time, during a slow part of the repair season (mid-winter) my boss told us clean up old inventory in the part's room. It had new-old-stock inventory from a Deere dealership he'd bought out in the 50s. There were piles of magneto parts, and brand new two-cylinder engine blocks, and heads, pistons, etc. He told us to take all the stuff down to the car-crusher and make sure it all got busted up before we left. He didn't want anyone getting the stuff and trying to resell it. I spotted a brand new engine block that would fit my 1936 BO and wanted it bad. At the time, it was no longer available from Deere. So, I made him an offer to buy the whole lot, and he reluctanly sold me it all for $400 - with my promise NOT to sell any of the stuff to our customers. I sold it all the next day for $800 and thought I'd made a killing. If it was now, with Ebay, the stuff would bring thousands. I took two full pickup truck loads to carry it all. In the lot was also old test equipment and three large magnet chargers. I still have one of those. Sometime in the early to mid 80s, Deere had a long strike. Seems we went for months, maybe close to a year with little to no parts available from Deere. It was a mess. We were taking apart brand new machines to get parts to fix customers mahcines. Then, my boss - reluctantly, started buying back used parts from me that I had stockpiled. Since new parts were not available, we stared using a lot of aftermarket suff when available, or fixing used parts. In restrospect, I'm surprised that strike didn't put an end to Deere Company. We lost a lot of once-loyal customers. Anyway, the point to this long story is - I could probably retire on the value of those parts if I had them today. But, I don't. I've got lots of Deere equipment - but - I have to buy stuff over the counter or from a nearyby tractor salvage yard - and parts ARE expensive.

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Seann

12-03-2004 13:43:55




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 Re: Information on Crawler Reverser, Please in reply to jdemaris, 12-03-2004 06:07:06  
Interesting story jd! I always enjoy reading what you have to say; super knowledgeable, great advice and with good stories to tell.

And I know I've said this before, but I really wish we had an ihemaris here too. lol



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Lavoy

12-03-2004 09:26:09




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 Re: Information on Crawler Reverser, Please in reply to jdemaris, 12-03-2004 06:07:06  
Multiply your story times how many other guys that can tell the same story and look at all the parts that went for iron, kind of sad.
I sell a lot of aftermarket parts, mainly crawler, if you need something, let me know.
Lavoy



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smitty in va

12-02-2004 15:40:50




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 Re: Information on Crawler Reverser, Please in reply to jdemaris, 12-02-2004 11:37:01  
hello,

i have a 440 diesel that is direct drive, what would it take parts wise and cost wise to buy the parts to put a reverser in it? how difficult is it to put in? does it mount on the left side about a foot in front of my shin? there is a cover plate there on mine that is rust colored instead of the jd yellow like the rest of the motor. like it may have been removed at some point.

thanks,

smitty

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Lavoy

12-02-2004 16:14:30




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 Re: Information on Crawler Reverser, Please in reply to smitty in va, 12-02-2004 15:40:50  
Smitty,
Will vary depending on what you have in yours already, but if you do not have the rear drive hub and such still inside the case, it will require a double split to do it. Even if the parts are there, I would still split it and take them out to check conditon.
I have a complete reverser on hand, send me an e-mail if you want any more info.
Lavoy

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