I'm looking at a '89 580 K PHASE 3, price is right. But, FWD does not engage, owner said it just quit. Could this be linkage, do not know how engagement works on these 4x4 s. Wondering if it is a common fault or is it big bucks? Going up to buy it tomorrow 5000 hours looks good except for the 4x4. Thoughts welcome on how the hoe goes from 2wd to 4wd, electric, mechanical ?
Update: Just spoke to the owner. Said that driveshaft coming forward from the main transmission is not turning. Does the transaxel have to come out to repair this? So something in the rear main transmission is the problem. Anyone know what that something might be.
If the driveshaft is not turning, there is no pressure in the system or it has a broken flexplate. There is a transmission cutout switch / valve - but that would effect reverse as well. Does it drive in reverse? Could also be a pump or convertor issue, which would stop all drive rev included. The 4wd is a mechanical linkage, is it also not working?
Front wheels do not drive in reverse. He called me this afternoon and said that with the front wheels off the ground you could freely move the driveshaft. So it looks like the problem is in the rear trans axel. The machine runs fine in 2wd it is just 4 wd. Does the trans axel have to come out to repair this? This smells like a big dollar repair if done at a dealer. I was hoping it was just the front axel, something I feel I can handle but the trans axel quite another thing. The machine is 120 miles from me.
Front wheels do not drive in reverse. He called me this afternoon and said that with the front wheels off the ground you could freely move the driveshaft. So it looks like the problem is in the rear trans axel. The machine runs fine in 2wd it is just 4 wd. Does the trans axel have to come out to repair this? This smells like a big dollar repair if done at a dealer. I was hoping it was just the front axel, something I feel I can handle but the trans axel quite another thing. The machine is 120 miles from me. Also. He said it was working fine then just stopped in 4wd. The machine has a alternator that does not work so he just charges that battery and uses it till the volts drop enough to not operate the shut off solenoid on the engine. Wondering if the cut out switch/ valve is not working with low volts is it located on the trans axel at the rear of the machine? Would this allow the driveshaft to rotate free as stated above? The 4wd linkage is free and working.
The problem will not be electrical. The fingers #15 on the selector fork #14 for 4wd will likely be worn, allowing the selector collar #12 to move & disengage drive. Good news is that if this is the problem, it is quite easy to repair. Just remove the driveshafts & MFD cover from the front of the transaxle. You will need to remove the next cover containing the park brake, as half the bolts which hold the MFD also retain the park brake cover & it WILL leak oil if not removed & resealed. Best to check the park brake condition anyways.
Does item 14 thru 2 come off as one piece with the removal of part 5? What does 22 do, does it shift 14? If so could it be 22 does not move 14 enough to engage 12? Machine has about 5000 hours on it, why would this fail? Is it a common problem? Alrman, I cannot thank you enough for your kindness in helping me and others with this stuff, kinda reaffirms ones faith in human nature!
Update: The owner said he took off the linkage to 22 and worked it by hand with the tractor off the ground and the thing in gear and rear wheels turning. Shaft to FWD still did not turn. Question: If one took off part 5 and found the fingers okay what could be the problem. Could the shaft coming out of the trans axel not be turning. Or must it turn if the tractor runs fine in 2wd. Sorry about this but I would really like to get this machine but don't want to buy a bag of snakes.
1) Yes #14 - #2 comes off in one piece 2) Yes the worn fingers are a common problem 3) It fails cause it just does. The collar turns whenever the machine is moving & the fingers are sitting inside it 24/7 - I didn't invent it 4) Moving the control lever by hand is simply checking the detent operation, & moving the selector fork. If the fingers are worn the sliding collar will not move far enough to engage the pinion shaft. 5) It is a very simple system. The siding collar receives torque directly from the pinion shaft. So, if the machine is driving in 2wd the pinion shaft is OK. :drinkup