Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
I had a messy but fun time pulling the Tuff Torq tranny off that old
JD455. I've been working on the assumption that the shade-tree guy who welded the tow valves shut actually caused the "no reverse" problem it has. Now, I'm pretty convinced. There were a couple of case leaks, so that offered an opportunity to peek inside with good reason. But when I got the case open, I was completely amazed. This thing has 3K hours of actual mowing on it. There wasn't enough swarf inside the case to dirty one fingertip! If I didn't mind the taste of ATF, I could've eaten out of it. Now I'm completely convinced that nothing is hanging up or broken in there. The only wear I could see at all was a high mirror polish on the tips of the PTO gears. The differential didn't show any wear beyond break-in that I could detect. The schematic shows that the hydrostatic circuit gets its fluid charge from the two check valves he welded shut... duh! Why didn't he just replace the o-rings that were leaking?????? The two valves are spendy, running over $350 for the two, but I think it's a worthwhile expense. Since one of them is also a pressure releif valve, I thought better of fabricating them... the charging pressure really should be correct. So, I've buttoned it back up, sans leaks. More when the valves arrive via slow post. LLoyd |
#2
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message . 3.70... I had a messy but fun time pulling the Tuff Torq tranny off that old JD455. I've been working on the assumption that the shade-tree guy who welded the tow valves shut actually caused the "no reverse" problem it has. Now, I'm pretty convinced. There were a couple of case leaks, so that offered an opportunity to peek inside with good reason. But when I got the case open, I was completely amazed. This thing has 3K hours of actual mowing on it. There wasn't enough swarf inside the case to dirty one fingertip! If I didn't mind the taste of ATF, I could've eaten out of it. Are you sure it uses ATF? Most hydrostats use motor oil or Universal Tractor Hydraulic Fluid (UTH). ATF is usually the worst thing for them. -Carl |
#3
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
"Carl Byrns" fired this volley in
news:xkfDi.6608$2N2.3579@trndny03: Are you sure it uses ATF? Most hydrostats use motor oil or Universal Tractor Hydraulic Fluid (UTH). ATF is usually the worst thing for them. -Carl Tuff Torq _specifies_ Type-F ATF. John Deere says, "NO! Buy our 'special low-viscosity hydrostatic fluid' -- it's RED". G LLoyd |
#4
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
On Tue, 04 Sep 2007 15:07:41 -0000, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote: snip good description The schematic shows that the hydrostatic circuit gets its fluid charge from the two check valves he welded shut... duh! Why didn't he just replace the o-rings that were leaking?????? The two valves are spendy, running over $350 for the two, but I think it's a worthwhile expense. Since one of them is also a pressure releif valve, I thought better of fabricating them... the charging pressure really should be correct. snip Hi LLoyd, Because the valves are spendy and he had a quick fix? Many years ago when I was a teenager... I took a look at a friends old Bridgestone motorcycle. It was just small one, probably under 100cc. It didn't run and they (father and him) took the cracked flywheel to someone to weld. They could see it was lose on the tapered crankshaft and thought they had found the problem. Still didn't work when they bolted it back on. It was cracked in the same area as the pulley Wes is working on fixing. I found it with a really nice weld/bead run over the crack. Only problem with this is that is the surface that the points rub on/use. Obvious to me, even though I had never seen one quite like it before. My friend could just see the crack and not the cam-shape on the wheel, points that run on it... Some people just shouldn't try to fix stuff -- Leon Fisk Grand Rapids MI/Zone 5b Remove no.spam for email |
#5
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
On Tue, 04 Sep 2007 16:02:37 GMT, "Carl Byrns"
wrote: "Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message .3.70... I had a messy but fun time pulling the Tuff Torq tranny off that old JD455. I've been working on the assumption that the shade-tree guy who welded the tow valves shut actually caused the "no reverse" problem it has. Now, I'm pretty convinced. There were a couple of case leaks, so that offered an opportunity to peek inside with good reason. But when I got the case open, I was completely amazed. This thing has 3K hours of actual mowing on it. There wasn't enough swarf inside the case to dirty one fingertip! If I didn't mind the taste of ATF, I could've eaten out of it. Are you sure it uses ATF? Most hydrostats use motor oil or Universal Tractor Hydraulic Fluid (UTH). ATF is usually the worst thing for them. That varies a lot. In fact all of the John Deere's I've seen specify ATF (admittedly my experience is with much older machines). In my case there is a mess up in the manuals somewhere. My factory service manual calls for Type F where my factory owners manual calls for Type A. Both manuals are for my year model and serial number as well. Well for my oldest one anyway, I've actually got three of them with the last two having the same transaxle despite a number of years difference and different model numbers as well. I've never seen anything other than Type A in any of them. |
#6
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
On Tue, 04 Sep 2007 15:07:41 -0000, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote: I had a messy but fun time pulling the Tuff Torq tranny off that old JD455. I've been working on the assumption that the shade-tree guy who welded the tow valves shut actually caused the "no reverse" problem it has. Now, I'm pretty convinced. There were a couple of case leaks, so that offered an opportunity to peek inside with good reason. But when I got the case open, I was completely amazed. This thing has 3K hours of actual mowing on it. There wasn't enough swarf inside the case to dirty one fingertip! If I didn't mind the taste of ATF, I could've eaten out of it. Great news. Now I'm completely convinced that nothing is hanging up or broken in there. The only wear I could see at all was a high mirror polish on the tips of the PTO gears. The differential didn't show any wear beyond break-in that I could detect. The schematic shows that the hydrostatic circuit gets its fluid charge from the two check valves he welded shut... duh! Why didn't he just replace the o-rings that were leaking?????? I never cease to be amazed at some of the stupidity people do. The two valves are spendy, running over $350 for the two, but I think it's a worthwhile expense. Since one of them is also a pressure releif valve, I thought better of fabricating them... the charging pressure really should be correct. Well worth the money for a mower of this quality. So, I've buttoned it back up, sans leaks. More when the valves arrive via slow post. Sounds good. |
#7
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message . 3.70... "Carl Byrns" fired this volley in news:xkfDi.6608$2N2.3579@trndny03: Are you sure it uses ATF? Most hydrostats use motor oil or Universal Tractor Hydraulic Fluid (UTH). ATF is usually the worst thing for them. -Carl Tuff Torq _specifies_ Type-F ATF. John Deere says, "NO! Buy our 'special low-viscosity hydrostatic fluid' -- it's RED". G LLoyd That is weird- both Sundstrand and Eaton specifically say not to use ATF. And Type F has an abrasive component, IIRC (or was that Dexron?). Can you even buy Type F anymore? -Carl -- The future isn't what it used to be. |
#8
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
Wayne Cook fired this volley in
: My factory service manual calls for Type F where my factory owners manual calls for Type A. Both manuals are for my year model and serial number as well. Well for my oldest one anyway, I've actually got three of them with the last two having the same transaxle despite a number of years difference and different model numbers as well. I've never seen anything other than Type A in any of them. Are yours in the same class as the 455? Do you know the tranny type off- hand? My Deere manual says "never use ATF, it causes clutch chatter". Tuff Torq says they've never recommended anything else, and have never heard of a clutch chatter problem on the K92 transaxle. LLoyd |
#9
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
On Thu, 06 Sep 2007 11:32:38 -0000, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote: Wayne Cook fired this volley in : My factory service manual calls for Type F where my factory owners manual calls for Type A. Both manuals are for my year model and serial number as well. Well for my oldest one anyway, I've actually got three of them with the last two having the same transaxle despite a number of years difference and different model numbers as well. I've never seen anything other than Type A in any of them. Are yours in the same class as the 455? Do you know the tranny type off- hand? Mine are much older and about one step down in size (back then they where the largest they made). My newest one is a 350 (or something like that in the 300 series) the older ones are from before Deere revamped the numbering system and are 140's (but they're all the same size). I'd have to look but I'm pretty sure they all use Sunstrand hydrostats (I know the oldest one is). The oldest has a completely different layout compared to the other two. My Deere manual says "never use ATF, it causes clutch chatter". Tuff Torq says they've never recommended anything else, and have never heard of a clutch chatter problem on the K92 transaxle. Saywhat? What clutch? I know I didn't study your break down very hard but I sure don't remember a clutch in there. My oldest model actually has a clutch on it but it's mounted on the flywheel of the engine. It's dry and stops the input shaft to the hydrostat. |
#10
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
Wayne Cook fired this volley in
: Saywhat? What clutch? I know I didn't study your break down very hard but I sure don't remember a clutch in there. My oldest model actually has a clutch on it but it's mounted on the flywheel of the engine. It's dry and stops the input shaft to the hydrostat. PTO clutch. The hydrostatic circuit is a "true" hydrostatic, using the zero-displacement position of the pump for "neutral". The PTO clutch is a pilot-operated, damped, single-acting, spring-return cylinder that presses a composition disk against a metal pressure plate. LLoyd |
#11
Posted to rec.crafts.metalworking
|
|||
|
|||
JD-455 Transaxle update
On Fri, 07 Sep 2007 11:28:17 -0000, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote: Wayne Cook fired this volley in : Saywhat? What clutch? I know I didn't study your break down very hard but I sure don't remember a clutch in there. My oldest model actually has a clutch on it but it's mounted on the flywheel of the engine. It's dry and stops the input shaft to the hydrostat. PTO clutch. The hydrostatic circuit is a "true" hydrostatic, using the zero-displacement position of the pump for "neutral". The PTO clutch is a pilot-operated, damped, single-acting, spring-return cylinder that presses a composition disk against a metal pressure plate. OK. That's possible. There's nothing remotely similar on any of mine. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Ode to the nut-An Update | Woodworking | |||
Captain's Bed Update, Web page update | Woodworking | |||
Help with Ariens EZR transaxle | Home Repair | |||
peerless transaxle....who? | Metalworking |