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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

jd350 reverser/driven disc

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Rob in Yukon

01-19-2005 11:26:18




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I live in a small community in the Yukon Territory Canada, many miles from a dealer or Derre mechanic. I have a 350 dozer, low sn, pre B that I made up an arch for and use for my one man logging show. The reverser has been weak since I bought the machine and I knew a rebuild was going to happen one day. Recently my driven disc piled up so now is the time. I have the reverser out of the machine and dissassembled in my shop. Deere dealer in Regina Sask. has a 'new from Deere' disc available so no problem there. An aftermarket dealer in Edmonton Alberta has a rebuilt shuttle pack available, which is the clutch packs, shaft and front spider, for a lot less than buying parts from Derre and rebuilding myself. My question is can the driven disc be used with a front spider/shaft that may come from a later machine that used the torsional isolator. This is a great site. I've been reading for about a year now. I'd appreciate any help.

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jdemaris

01-20-2005 05:53:14




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 Re: jd350 reverser/driven disc in reply to Rob in Yukon, 01-19-2005 11:26:18  
As I recall, the splines are the same on the older input shaft and the newer one. The big difference is the center bearing size. The old input shaft-hub-spider (or whatever you want to call it) has a very small bearing race in it where it connects to the matching bearing cone on the output shaft. When replacing it - e.g. if it's trashed and you buy a new one through Deere, you get the newer updated unit with the larger bearing. So, this means you also have to change the matching bearing cone that's on the output shaft - which can be hard to to. I've seen some output shafts get ruined in bad attempts to change the bearing. Make sure, FIRST, that you remove the orifice from the output shaft. Takes an Allen drive wrench. Also, make sure, when reassembling, the orifice is put back in and is NOT plugged. As far as the driving disk goes, the old setup holds up better than the convuluted isolated that was used later until the "D" series came out. With the introduction of the D series, the separate spring and hook isolator was eliminated. When putting it all back together, make sure the splines on the reverser output shaft, the splines on the transmission input shaft, and the coupler that connect them, are all good. Also, make sure the dowels that goe between both cases are tight.

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ohkentucky

01-20-2005 13:48:23




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 Re: jd350 reverser/driven disc in reply to jdemaris, 01-20-2005 05:53:14  
I am also wondering if the aftermarket kit is a quality product. I have a 450 (1965) crawler\loader with a bad reverser. Please give me the name and number of the aftermarket supplier, I have been looking for a source for aftermarket parts on this. I need the clutch control valve assy, clutches, and oil pump.
JDEMARIS can you tell me if I can swap the complete reverser unit from a 450C into my older 450? I know there were some changes made, at least that is what I was told. I may have a line on a used unit from a 450C and I can get it cheaper than buying all these parts from JD. Any help guys would be appreciated. JP

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Rob in Yukon

01-20-2005 19:27:19




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 Re: jd350 reverser/driven disc in reply to ohkentucky , 01-20-2005 13:48:23  
Thanks to Jdemaris. Your advice is bang on with my manual but they don't talk about the change up in inside bearings. ohkentucky, the dealer I am talking to has a website you can find by searching for partsfinder or little dozers. I also found a rebuilder in Louisianna by doing a search on msn for jd350 dozer. This one never came up on google. I can get phone and mail info. later. It is out in the shop so I'll get it when I go out to stoke the fire to night

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ohkentucky

01-23-2005 19:42:00




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 Re: jd350 reverser/driven disc in reply to Rob in Yukon, 01-20-2005 19:27:19  
rob in yucon please email me the names and contact info on these suppliers. I would assume that if they have the 350 reverser parts they would also have the 450 parts. Im not familiar with the 350 but from reading jdemaris' posts it sounds like they are completly different in design. jarvewhite@aol.com

jdemaris, thanks for all the info you provide in your posts. Its good to know theres someone out there who "really" knows what they are talking about. A lot of the posts from others leave me wondering.

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jdemaris

01-21-2005 05:30:44




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 Re: jd350 reverser/driven disc in reply to Rob in Yukon, 01-20-2005 19:27:19  
In reply to both of you. On the 350 reverser and the front input shaft - better make sure you check the new parts with the old before installing. You asked about splines, but pay close attention to the front stub that rides in the pilot area of the flywheel. Old models have a large stub that rides in a bronze bushing. Later models have a small stub that rides in a ball bearing. As far as aftermarket parts go, are they really aftermarket? That's not a rhetorical question; I really don't know. Twin Disk company made the parts that Deere used originally - so maybe Twin Disk now sells to other retailers? If so, the parts would still be OEM. On the subject of the HL-R trans. as used in the 450s. I don't know much - if anything about swapping. I've worked on a equal amount of 450 and 350 series, but the 350 reversers went bad MUCH more frequently than the 450s. We used to consider the HL-R used in the 450 series as almost bullet proof. It was used in the 2010 series, just as the 350 reverser was used in the preceeding 1010 series. The 2010 HL-R, I believe, has a different case. When the 450 came out, I believe the case got beefed up a bit as time went on, but dimensions remained the same. Deere had to satisfy a big lawsuit sometime in the 80s that affected every single HL-R trans. ever made. They were ALL recalled, even the 2010s. The problem was a minor one to fix, but an expensive one for Deere. Seems people were getting killed by 2010s and 450s taking off in neutral since the HL-R did not have a definite neutral. The recall involved installing a new HL-R shift valve, and also modifying the shift linkage on the 4 speed range transmission.

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Rob in Yukon

01-21-2005 21:18:26




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 Re: jd350 reverser/driven disc in reply to jdemaris, 01-21-2005 05:30:44  
I think jdemeris is right on with comments about aftermarket parts. I guess this term is not always used correctly. I'm sure my reverser has had some work done to it in the past as the in and out shaft seals are mixed brands and some parts are stamped twin disc and others JD. In my case the dowel in the piston carrier broke and damaged the piston and carrier. These two parts from Deere plus some new clutch discs cost as much as the entire rebuilt 'shuttle pack'. I bought steering clutch and brake parts from the same supplier in the past and was happy with the product. I came across a site about Deere remanufacturing 350 and 450 machines. Newlife or relife, anyway they take your machine and rebuild it with genuine, updated parts for about 15 times what I paid for my dozer! I wonder where all of the parts go that they replace!

Jdemaris, thanks for the tip on the bushing/bearing. I had heard about this before, and my parts book shows both. As far as I have found out, all flywheels have the same bore size so the stub size is the critical point.

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jdemaris

01-22-2005 07:50:04




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 Re: jd350 reverser/driven disc in reply to Rob in Yukon, 01-21-2005 21:18:26  
Yeah, I wondering the same thing about what Deere does with all the old engines, isolators, steering clutch housings, etc. that get removed. The Certified Relife Program, with an older 350 (before the D series), replaces the entire engine (changes the 152 to the 179), isolator, changes dry steering clutches to wet, etc. Think I read the a "redone" 350 sells for over $80,000?



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