645 payloader

Well,I ended up buying the payloader. I think I struck a fair deal on it, so that even if the tranny is beyond feasable fixing, I could probably get my money back out of it by parting it out. Still have to get it home. It's about 100 miles away. On my way down to look at it, I told my wife what the absolute most was that I'd pay for it. When I got to dealing on it, I asked the seller what was the absolute least amount he'd take for it. It was the exact same figure I told my wife, so I guess it was meant to be. Still open to advice on the tranny issue. Thanks, Darrel

I am going to run this in the classifieds also, but I need a hood and radiator grill for this 645. Anyone know where there would be one? Thanks, Darrel

John, is there any way a person could weld it with a small wire feed through the inspection cover? Darrel

If I remember right the 645 had issues with the transmission pump getting worn and having low pressure. I think it was only around $600 in parts and could be replaced in the loader

darrel in ND wrote: one54dodgetruck wrote: If I remember right the 645 had issues with the transmission pump getting worn and having low pressure. I think it was only around $600 in parts and could be replaced in the loader Andrew    I'd be dancin in the street if that is the case. I'll have to check into it. Thanks, Darrel

darrel, unfortunately the crack is in a place you can only see with a mirror.  I did think about trying JB weld but I just don't think it would work.   

hope this mite help some
645 PM PRIOR TO SN 2032.pdf
645-B PM #73073134.PDF
645M PM #3055044-6-1.pdf

http://www.minnpar.com/manuals.asp


     B:-)     Dnoym

The main problem with overfilling is the trans builds up more heat and also can cause foaming.  Depending on what you use it for, you probably can get by this winter but come summer it will crap out on you after an hour or so of running.  If you take the cover off the left side (looking forward from the back) the intake tube is easily seen.  The bracket where mine broke is up above a few inches and with a mirror you can see it.  I suspect you will have to pull the trans out and repair it.  The good side of it is that parts are fairly reasonable and easily assessable.

Now the dad gum thing won't start. Has like new batteries and starter, cables look good, has almost 13 volts, put jumpers on it also, and all I get out of the starter is the old clunk....clunk....clunk. It has always spun over to beat hell and started right up till this morning. Where do I start? Darrel

24 volt system? I'd better check into that. I know it has two 12 volt batteries, and I thought they were hooked up in a parallel, but I never followed the cables that closely. I am going to have take another look. Thanks, Darrel

If its a Delco starter, the engaging solenoid may be bad.  With a heavy cable, jump from the hot post where the battery connects to the post on the starter bypassing the solenoid. I started our Cat 920 using that method until we changed the solenoid. Hopefully its not engaging because the flywheel teeth are bad.

If the starter spins, you have adequate amperage to energize the starter. Check the two small leads for continuity. This is a coil which pulls the drive into the teeth and energizes the motor. If it is open, then the starter solenoid will need to be changed. If you have 

Darrel, According to my shop manual it's just three steps to repair the transmission- Remove the hood and radiator, remove the engine, remove the transmission. 
There you go, two, three days should do it!

To help keep the project on a positive note Darrel, they are a great loader, and as Curt said, they will be around long after all todays electronic control junk is dead and gone. While on logging trucks years back, many crews in the forests loaded us with 645`s. Some used Cat 950`s, and a few had IH loaders. The Allis was head and shoulders above the rest for lift capacity and reach. We`d arrive on their landings and skids, the 645 would grab our 3 axle jinkers, lift them clear of the truck bolster/stauntion, reverse out, line up the pole eye with truck coupling for us to drop the pin in, then with a couple of back and forward moves, stretch the pole out without us moving the truck, then start loading. In the time it took the 645`s to do that and have a bed of 40` logs on the bolsters, the Caterpillars were still stuggling with getting the jinker off coz the they didnt have the reach to get the pole over the truck stauntions - we had to drive forward for them. The IH loaders, well they were still carrying the jumper cables across the landing to get them started.

solenoid was the problem. Don't have er back together yet, but hopefully tomorrow. Thanks for all of the help and encouragement from all of you guys on this project. Later, Darrel