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590 super L GO no GO

R

rabbit

Well-Known Member
Joined
Sep 12, 2010
Messages
119
Location
Washington
Occupation
Plumbing and Exavation Contractor
I have a 590 super L Case Backhoe. Started it up and drove it a few feet. Stopped. After that it would not go, forward or back.. Tried all the gears, looked for stuck declutch. Moving shuttle lever back and forth, sounds like something is working. Once briefly in reverse the backup horn came on. I was able to move it a few feet shifted into forward and nothing again. What??? Help!!!!!

:Banghead
 
alrman

alrman

Senior Member
Joined
Jun 20, 2009
Messages
3,308
Location
QLD Australia
Occupation
Diesel Fitter;Small Business Owner;Cleaner
If a shuttle shift - few things
1) Back up alarm should work from FNR lever - if no alarm (be sure alarm is 100% OK) the FNR lever could be suspect.
2) Wiring could be damaged from FNR to control valve or loose plug
3) make sure relays are all fitted properly - ie. machine digging rock may shake one out
4) Broken circlip at modulator (control valve)
I would be looking at electrics if rev alarm is not doing it's job
 
Goose

Goose

Senior Member
Joined
Feb 11, 2007
Messages
362
Location
Kansas
Look in the upper left corner of the relay panel. There should be an interlock relay that is on the outside of the panel like it was added on. This is an interlock relay that was added during an upgrade and became production later to break the transmission curcuit if there is a problem with the shuttle shifter due to moisture. We have them go bad alot. It looks like a bosch relay and has the same spades but is about twice as long.
 
R

rabbit

Well-Known Member
Joined
Sep 12, 2010
Messages
119
Location
Washington
Occupation
Plumbing and Exavation Contractor
Goose said:
Look in the upper left corner of the relay panel. There should be an interlock relay that is on the outside of the panel like it was added on. This is an interlock relay that was added during an upgrade and became production later to break the transmission curcuit if there is a problem with the shuttle shifter due to moisture. We have them go bad alot. It looks like a bosch relay and has the same spades but is about twice as long.
Click to expand...

Got it. The breaker had worked itself loose. Thanks

:usa
 
alrman

alrman

Senior Member
Joined
Jun 20, 2009
Messages
3,308
Location
QLD Australia
Occupation
Diesel Fitter;Small Business Owner;Cleaner
I would call a loose relay VERY LUCKY indeed! :drinkup
 
cat320

cat320

Charter Member
Joined
Nov 6, 2003
Messages
913
Location
Stoneham,MA
yes very lucky and easy fix . i drove my L one day stoped shut it off and could not move it forward or backward thought it was the shift leaver after trying to check relays then found out it was a relay the only one that was not interchangable with any others.
 
R

rabbit

Well-Known Member
Joined
Sep 12, 2010
Messages
119
Location
Washington
Occupation
Plumbing and Exavation Contractor
Thanks fella's. :usa
 

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