Ford/NH 655e wont start/move (electrical?) issue.

   / Ford/NH 655e wont start/move (electrical?) issue. #1  

flybob

New member
Joined
May 17, 2015
Messages
8
Location
troy, oh
Tractor
Kubota L4600
Please forgive me if this post is disjointed. The GD website logged me out while I was typing it, THEN it erased it when I resubmitted it a second time because it is apparently heavily into LSD and fantasized I had a link somewhere, so I have entered it 3 times (so far) and probably lost something in translation.


My backhoe wont start. It is a 20+ yo 5l Iveco Diesel engine with "power-shuttle" (I think thats what they call it) 4-speed clutchless manual with torque converter.
It has electronic F/N/R (no mechanical connections) lever on the column. Lots of hours, but surprisingly few leaks.

Ive had it 3-4 years and it always ran beautifully til this "happened". It lives outside in OH, I don't own a building it would fit in. I think some wires got mouse-chewed someplace during a long idle period (6 mos) last year while my mom was in the hospital and my after work time was spent taking care of her or her house. The backhoe has always had mice, they love the thing. If I needed to build a mouse house for some reason (like those cat tower things) I would shape it like a backhoe. I cover all the openings (this HAS gotten the squirrels out!), but obviously nothing will keep them out of the chassis where all the wires are unless I tether several cats to the thing fulltime, or park in a big vat of acid. But anyway, on to the situation.

The battery is new(ish). The main disconnect is connected.* The fuses are all good, except for the 1 that runs the (nonexistent) radio is blown, guessing the wires dangling loose said hello to each other (long before I got it; the fuse had electrical tape on it which I assume was a reminder that it was blown). Also the main 80A fusible link on the firewall is missing altogether and has been bypassed (before I got it; I will replace once I get this problem solved).

The starter will not engage when key is turned. The electrical accessories seem to all work (lights, wipers, fan). The oil pressure light is on (until it is started) and the glow plug light works as expected (not on until key turned 1 more notch). The gas gauge seems to have stopped working, not sure if there is a relation.

When this problem FIRST happened, the temp gauge was all the way redlined (in February, while 25F ambient ). I suspected there might be a "safety feature" that wouldnt let it start while overheating. I cleaned out a bunch of mouse debris around the thermostat area and the gauge went back to normal (ie all the way cold). But still wouldnt start.

I confirm the gear lever is in neutral. I fondle the "disengage" buttons on the gear stick and bucket control lever to make sure they arent stuck.

If I jumper the fuel value and manually trigger the starter, it starts and runs sweetly as ever (and this is the smoothest diesel I have ever operated).

Once I get it the engine running, all the hydraulics work. The oil pressure light goes out.

BUT, if I try to put it in gear, nothing happens, neither F nor R. I proofed the F/N/R switch with a meter and it is sending correct signals. With the ignition on and the engine not running, I can hear the F/R relays clicking on the fuse panel when I shift the lever, and I have proved they are sending the right signals with a tester as well. But, this thing is well used and there are several wires in the fuse panel that look like they were added later, including several with no obvious connections to anything.

There is a panel under the floormat which looks like it might give access to the top of the transmission, I think my next step is to remove that and check the other end of the wires from the F/R relays


Anyone have any experience with this? Or have general debugging suggestions? I am guessing SOMEPLACE there is a "safety feature" that keeps it from starting while its in gear and it falsely thinks it is already in gear so it wont "shift" into gear either.

Also, while youre here, does anyone know if this is a "wet sleeve" engine that needs coolant additive?


* Naturally I reconnect it for testing. HOWEVER-prior to this problem happening, I never had to switch it off in the first place, there was no current drain during idle periods, even as long as 2 months it never ran the battery down. NOW however, if I leave it connected it runs the battery down overnight and when I charge the battery externally, I can see a couple more amps current flow on the charger if the battery connect is on than if its off.
 
   / Ford/NH 655e wont start/move (electrical?) issue. #2  
The engine may have an Iveco tag, but it is a Ford designed parent bore engine built in Basildon, England. It does require coolant with DCA/SCA protection.
An OEM service manual with the wiring schematic is your friend. The neutral safety circuit is integrated into the shuttle control.
 
   / Ford/NH 655e wont start/move (electrical?) issue. #3  
Sounds like you are on the right track checking for mouse damage.

Do you have manuals for it?

That panel in the floor will get you access to the forward, reverse, and 4WD solenoids. Make sure you have transmission fluid in it before chasing electrical possibilities. Trans, Hydraulic, and rear axle all take the NH 134D spec oil. I just use the premium hydraulic fluid from tractor supply that has that spec in the label.

I have only had an issue with the 4WD solenoid coil being burnt up. I was able to cross it with a Delta PDL12 and just spliced my plug on it.
 
   / Ford/NH 655e wont start/move (electrical?) issue. #4  
F.Y.I. there are several of us X55E backhoe owners over on the heavy equipment forum. We are all learning as we go but there is some knowledge to be had on them over there.
 
   / Ford/NH 655e wont start/move (electrical?) issue.
  • Thread Starter
#5  
F.Y.I. there are several of us X55E backhoe owners over on the heavy equipment forum. We are all learning as we go but there is some knowledge to be had on them over there.

Thanks; I'll definitely check that out.
 
   / Ford/NH 655e wont start/move (electrical?) issue.
  • Thread Starter
#6  
I do have a manual of sorts; its the OEM x55e service manual, but its downloaded and its not that good of a scan (think fax) and the schematics particularly dont show up very well.
 
   / Ford/NH 655e wont start/move (electrical?) issue.
  • Thread Starter
#7  
Additional question; what is the button on the end of the F/N/R lever for? (I dont have anything there, just a little metal nub)
 
   / Ford/NH 655e wont start/move (electrical?) issue.
  • Thread Starter
#8  
Well, got the access plate off. Pretty much every wire going anywhere near the transmission is chewed thru or at least stripped back for 3 inches. I think I found my problem. I hope I can guess which ones went to which; because...

was going to see if the connectors were purchasable but just found out *****ing Case/New Holland took down that fantastic parts finder website (partstore.agriculture.newholland.com) they used to have! Now all you can buy is oil filters and pseudorandom irrelevant common parts. I guess they are out of the parts business.
 
   / Ford/NH 655e wont start/move (electrical?) issue. #9  
Additional question; what is the button on the end of the F/N/R lever for? (I dont have anything there, just a little metal nub)

That would have been the horn button. Mine is missing too.

Well, got the access plate off. Pretty much every wire going anywhere near the transmission is chewed thru or at least stripped back for 3 inches. I think I found my problem. I hope I can guess which ones went to which; because...

was going to see if the connectors were purchasable but just found out *****ing Case/New Holland took down that fantastic parts finder website (partstore.agriculture.newholland.com) they used to have! Now all you can buy is oil filters and pseudorandom irrelevant common parts. I guess they are out of the parts business.

You can pretty well be assured those connectors are not available separately from NH. I would just buy some male/female weather pack connectors and a proper crimping tool to assemble them with.
 
   / Ford/NH 655e wont start/move (electrical?) issue.
  • Thread Starter
#10  
OK, horn no big loss. I dont even know if the horn is still on the chassis, havent looked. I can always carry one of those handheld air horns.


I wanted to see the parts diagram online to a) see what the parts were called and b) see how small they broke down; ie can I get JUST the wire doodad, do I have to get the (ow) whole solenoid body, or do I need to (ouchie) acquire the whole manifold/diaphragm/whatever.

The problem isnt so much the connectors themselves, (actually, I have one of the connectors with me right here - its fine; they were loose once unplugged) its the wires coming out of the solenoid(?) body that'r chewed down to a nub. I dont think theres enough left there to solder or crimp to. And it seems to be a sealed unit. Of course its packed in 20+ years of dirt/grease/mousepoop so maybe not.

And thats assuming I could figure out a way to work in that position TO solder/crimp in the first place - I need to make a human harness that I can dangle on from the roof instead of needing both my hands just to hold me over the opening while my knees are dissected by the step treads. Or maybe put a scaffold up against the port side of the 'hoe to lay on. Which will involve cutting down a tree to make room for it (hedgeapple - no big loss, other than all the thornholes I will take moving it). Ive never worked on anything this big before, pickups mostly. I guess my hay baler would be biggest before this, but mine is pre-electronic, so everything is right there out in the open and self explanatory. No secret backdoors for Korean hackers to attack Japanese hydroelectric dams through, or to provide an excuse for the mfr to sue me for changing my own oil without giving them a bribe first. Sorry, off on a tangent.
 

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