I have a 1997 r520 loader that sometimes will not move when put into forward or reverse. Occasionally turning the engine off and restarting will solve the problem. Loader still lifts and moves side to side with no issues. Any suggestions would be appreciated.
1997 R520 Sometimes Won't Move
- Thread starter biggin60
- Start date
Re: !997 R520 Sometimes Won't Move
I don't have a clue how that thing works. It looks like some sort of electronically controlled hydrostatic transmission with two separate pumps and a very complicated set of valves and plumbing. Check the fluid lever, maybe check for broken off sensors but beyond that I can't be of much help.
I don't have a clue how that thing works. It looks like some sort of electronically controlled hydrostatic transmission with two separate pumps and a very complicated set of valves and plumbing. Check the fluid lever, maybe check for broken off sensors but beyond that I can't be of much help.
Re: !997 R520 Sometimes Won't Move
Did you ever find out what the issue was? I have one doing the same thing.
Did you ever find out what the issue was? I have one doing the same thing.
ShaunBlake
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Re: !997 R520 Sometimes Won't Move
He's only posted twice, a question each time about R520, and never a follow-up. You'd prolly do better to start a new thread. Provide plenty of details; as of now this thread has been read almost 550 times, with only one suggestion, and two ancillary commenters (you and me).
Re: !997 R520 Sometimes Won't Move
Appreciate the feed back. I think we finally figured it out last evening after several hours of testing and diag. Looks like the wiring harness, that is in the steering console has a bad wire in it. Took hours but tested every wire in it, but finally found the broken one.
Thanks again.
Appreciate the feed back. I think we finally figured it out last evening after several hours of testing and diag. Looks like the wiring harness, that is in the steering console has a bad wire in it. Took hours but tested every wire in it, but finally found the broken one.
Thanks again.
North Idaho Wolfman
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Re: !997 R520 Sometimes Won't Move
This is more of a reference for future use as you have it figured out.
If you click on his name in orange there is a link to email him.
This is more of a reference for future use as you have it figured out.
Re: !997 R520 Sometimes Won't Move
I did try to email him with no luck.
We've been working on this thing in our shop for what seems to be forever.
The harness was available out of the CA warehouse, so I must not be the only one.
It will be on it's way back home to the customer Monday or Tuesday. Thankfully we have had a less than normal winter and the customer has not been with out it, in time of dire need.
I did try to email him with no luck.
We've been working on this thing in our shop for what seems to be forever.
The harness was available out of the CA warehouse, so I must not be the only one.
It will be on it's way back home to the customer Monday or Tuesday. Thankfully we have had a less than normal winter and the customer has not been with out it, in time of dire need.
Re: !997 R520 Sometimes Won't Move
Have an R420 with the same issue. Initially it would require a warm up and then get going. And sometime would need to turn off and try again and it would work. But very inconsistent which to me would indicates a relay going bad but can't seem to find one that controls the forward/ reverse engagement. Also sometimes I would be riding along and boom the ebrake would engage and stop the tractor. Wait a few minutes and then it would go again. I found one wire broken in the wiring harness up by the steering column and fixed it but that didn't help. I guess could be others with insulation intact but not wire. Will check some more but it is really driving me crazy. Anyone pinned anything down on this? Would love some help.
Have an R420 with the same issue. Initially it would require a warm up and then get going. And sometime would need to turn off and try again and it would work. But very inconsistent which to me would indicates a relay going bad but can't seem to find one that controls the forward/ reverse engagement. Also sometimes I would be riding along and boom the ebrake would engage and stop the tractor. Wait a few minutes and then it would go again. I found one wire broken in the wiring harness up by the steering column and fixed it but that didn't help. I guess could be others with insulation intact but not wire. Will check some more but it is really driving me crazy. Anyone pinned anything down on this? Would love some help.
RCW
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Re: !997 R520 Sometimes Won't Move
h20ford -
Hate to say it, but most of us guys have tractors or TLB. While some of us know much about tractors, the loaders are a whole different deal, except for the engines.
It sounds like you're chasing a spooky electrical issue. There's an intermittent short and/or bad ground/connection. Nothing but diagnostics can fix that.
I would try starting with this, they do have diagrams for the R420:
http://www.kubota.com/part/partsList.aspx
You may also want to get a Workshop Manual, if you don't already have one.
Maybe someone with experience with your machine will chime in.
Best of luck, wish I could have helped.
h20ford -
Hate to say it, but most of us guys have tractors or TLB. While some of us know much about tractors, the loaders are a whole different deal, except for the engines.
It sounds like you're chasing a spooky electrical issue. There's an intermittent short and/or bad ground/connection. Nothing but diagnostics can fix that.
I would try starting with this, they do have diagrams for the R420:
http://www.kubota.com/part/partsList.aspx
You may also want to get a Workshop Manual, if you don't already have one.
Maybe someone with experience with your machine will chime in.
Best of luck, wish I could have helped.
Last edited:
Daren Todd
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Re: !997 R520 Sometimes Won't Move
Does your loader have a parking break safety switch?
Or a position switch for the gear shift?
These are usually found on equipment with electric shift transmission. Not sure of the propper name
Our forklift at work will not engage forward or reverse if the parking brake is engaged. You can move the forward/ reverse lever, but the unit will stay in neutral. Switch is getting hinky, so usually we have to move the parking brake lever a couple times in order to get the forklift to engage forward or reverse. The forklift also has a seat sensor. If you raise off the seat it will kick the forklift into neutral. In order to get it to move again, you need to move the forward reverse lever back to neutral and then back to the direction you were going.
I've also come across it in some loaders, boom forklifts, and backhoes where they have a rocker switch to engage the parking brake.
So basically what I'm saying, is there is probably some safety switch giving you fits or relay going bad.
Does your loader have a parking break safety switch?
Or a position switch for the gear shift?
These are usually found on equipment with electric shift transmission. Not sure of the propper name
Our forklift at work will not engage forward or reverse if the parking brake is engaged. You can move the forward/ reverse lever, but the unit will stay in neutral. Switch is getting hinky, so usually we have to move the parking brake lever a couple times in order to get the forklift to engage forward or reverse. The forklift also has a seat sensor. If you raise off the seat it will kick the forklift into neutral. In order to get it to move again, you need to move the forward reverse lever back to neutral and then back to the direction you were going. I've also come across it in some loaders, boom forklifts, and backhoes where they have a rocker switch to engage the parking brake.
So basically what I'm saying, is there is probably some safety switch giving you fits or relay going bad.
Re: !997 R520 Sometimes Won't Move
Problem SOLVED!! Stray wire disconnected (broken) feeding hydraulic solenoid slightly to rear of steering column. This connection seems susceptible to damage in brushy and rocky conditions. Easy fix that took forever to find. Great machine!!
Problem SOLVED!! Stray wire disconnected (broken) feeding hydraulic solenoid slightly to rear of steering column. This connection seems susceptible to damage in brushy and rocky conditions. Easy fix that took forever to find. Great machine!!
North Idaho Wolfman
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Re: !997 R520 Sometimes Won't Move
Nope... It's just coming into the prime of it's life!1997, maybe it's tired.....
Re: !997 R520 Sometimes Won't Move
I would start with a new parking brake switch. I have a customer that has a R420 and that fixed his
I would start with a new parking brake switch. I have a customer that has a R420 and that fixed his
Sorry on resurrecting an old topic. But have an old R-510, that has a similar problem. However the LST light comes on after it warms and doesn't want to travel in reverse. We had to replace the drive coupler 1 1/2 years ago and everything has been just fine. Changed all the filters, oil etc. Have checked hoses for air leaks as well. So not sure if anyone is familiar with these as I have been through Canada, Japan etc trying to find the problem resolution with no real answers. Guessing the mechanics that know these are no longer working, or these babies rarely have problems.
Thanks
Thanks