|
|
Ohio | This bitter cold has the DEF freezing on our NH T7.170 . Our NH service guy says this particular engine model (Tier IV Class A) does not have a DEF heat mechanism like the Class B engine. We use this tractor to remove snow (due to front end loader and scrapper).
Other comments
- Barn/Shed is not heated.
- Does anyone made/sell a temporary heating blanket/wrap to go around the DEF Tank?
- I know some places offer DEF deletes. Who is best?
- Any ideas appreciated
Thank you.
Leon Freehauf
317.501.6620
Edited by lfreehauf 1/4/2018 07:27
|
|
| |
|
Galena IL | A few years ago I got an oil pan heater. It was about 6 inches wide and 8 inches long and we just glued it to the oil pan of an air cooled Engine we had at the time. Don't remember the name of it think I got it from Napa.... Dennis |
|
| |
|
east Dakota | def tank is plastic |
|
| |
|
| If you've got electricity in the shed, how about putting an electric hot human pad on it with some insulation around it or maybe electric tape like used on a water pipe?
fwiw,
Art |
|
| |
|
n.c.iowa | That's kinda weird. I just checked the parts for your tractor and it sure looks like it has a def heater.
I think your dealer better have another look.
|
|
| |
|
NC Iowa | if you cant find one from dealer, this might be an option. $60.00
Wolverine def Heater
https://wolverineheater.com/collections/watercraft/products/small-re...
|
|
| |
|
| Pretty sure u can get a def delete plug in for $1000. That reminds me I need to get one |
|
| |
|
Wi | I won't claim to know anything about CNH stuff of that Era, but based on experience with other brands using the same denoxtronic system and similar concepts, I'd say you have a heater.
Parts diagram shows the heater valve for your tractor. It's circled below. That bundle of lines, if it's like any other system, includes two lines for coolant(the larger two). The heater valve controls coolant circulation through DEF tank to thaw DEF. Now this can create some issues, those that like to let tractors "warm up" for 30 minutes may have issues because the DEF will not thaw fast enough because newer engines don't "warm up" just sitting around idling(even at high RPMs). IIRC CNH in particular had issues with DEF not thawing quick enough and putting tractor into reduced power and there was an update for this, at least on some models.
The Tier 4B versions show a heater "valve" but list 12v next to it and do not appear to have coolant lines. The valve in diagram looks the same but that doesn't mean much. Maybe they use an electric heater on newer ones, I don't know but yours should have a heater regardless. I'd be telling dealer to work a bit harder on it, I'm sure there's no shortage of info on Assist about this issue.
 (Screenshot_20180104-085136.jpg)
Attachments
----------------
 Screenshot_20180104-085136.jpg (156KB - 93 downloads)
|
|
| |
|
n.c.iowa | Yep that’d be a typical setup on a cnh machine. |
|
| |
|
Ohio | Thank you to all that respond. I'm reading each. I appreciate it ! |
|
| |
|
Ohio | Thank you. My question. This attaches to outside of a (plastic DEF) tank?
I will call reseller/manufacture to confirm. |
|
| |
|
Ohio | Thank you Durallymax and johnny skeptical.
Please allow me to read/research. Thanks again for sharing.
Edited by lfreehauf 1/4/2018 09:38
|
|
| |
|
Ohio | I thought about doing that. If it continues to cause problems, I'll do it. |
|
| |
|
Stanford IL | I sell a module to bypass the DEF system. If you are interested don't hesitate to reach out. Also I am fairly certain your tractor has a heater for the DEF in it. |
|
| |
|
Shelburne Ontario Canada | Plowing snow with mine one time wind chill was -42 celcius. Run tractor at 1800 engine rpm def was thawed up in an hr half of pushing . Just wen it was about to derate shut down restart an it worked like it was supposed to |
|
| |
|
Pesotum, IL | A quick search on ASIST shows that there is new software available for both the ECU and DCU. Seeing that your dealer says there is no DEF heater in the tank (which there certainly is), I'm going to assume the software for one or both of these modules has never been updated.
I'm nearly 100% sure the software update will completely cure your issues.
ASIST states that the new software will activate the heating cycle using the valve at temperatures above 0 degrees F. You will see engine fault codes appear and the engine will begin to derate if the system does not see pressure in the DEF system within 30 minutes.
At temperatures below 0 degrees F, the system will disregard the 30 minute time limit and allow the system to enter an extended defrost mode that allows up to 8.5 hours of continuous operation before a fault code is displayed. During this 8.5 hours, the engine will be slightly derated but remain functional to protect the dosing nozzle from excessive exhaust heat. If at any time during the 8.5 hour cycle the machine is shut down and key switch turned to the off position, the timer restarts and allows a full 8.5 hours of operation. If during this 8.5 hour window the DEF thaws, the SCR system will monitor temperature and attempt to build pressure. If necessary pressure is established, normal dosing will begin.
This information is based off of an ASIST search regarding Case IH Puma 130 models. I believe this is the corresponding model to the T7.170 New Holland model. I would begin with at least trying the newer software in the two controllers. It should solve all of the issues you're having with frozen DEF.
Information for your dealer:
New Holland Service Bulletin: 2014 - 004 NHAG N SB
Case IH Service Bulletin: 2014 - 005 CIH N SB
Edit to add: I skipped over the very beginning of the service bulletin, but it does list the T7.170 as an affected model. This bulletin actually covers everything from T6 models through T9 models.
Edited by CASE3594 1/4/2018 12:26
|
|
| |
|
| Def freezing and not working is/was a common problem on those tractors in cold climates. A software update did help a lot but didn't completely cure the problem with them in cold weather. If it was above the cut off temp for using def and you had a wind blowing on the tank it wouldn't thaw it out but engine was calling for it and still derated engine. |
|
| |
|
| I've got a NH T7.200 and mine has a DEF heater. I've never had trouble, mine is inside but building isn't heated. And it gets dang cold here too. I suspect you have one on the tractor and it's not working.
Edited by Sheep Herder 1/4/2018 14:59
|
|
| |
|
Southeastern Tipton County, Indiana | lfreehauf - 1/4/2018 08:24
This bitter cold has the DEF freezing on our NH T7.170 . Our NH service guy says this particular engine model (Tier IV Class A) does not have a DEF heat mechanism like the Class B engine. We use this tractor to remove snow (due to front end loader and scrapper).
Other comments
- Barn/Shed is not heated.
- Does anyone made/sell a temporary heating blanket/wrap to go around the DEF Tank?
- I know some places offer DEF deletes. Who is best?
- Any ideas appreciated
Thank you.
Leon Freehauf
317.501.6620
There is a heater in the DEF tank, every CNH tractor has one. There is a heating coil that surrounds the DEF suction tube in the tank, once heat builds in the engine it should thaw the DEF surrounding the suction tube enough to flow. If not getting heat the WABCO could be faulty. Along with the software updates to extend cold operation before derate due to lack of DEF flow it was also recommended to advance engine speed to 1500 RPM at startup and to use a short hydraulic hose looped at a remote valve to add a hydraulic load to aid in engine warmup and gets the hydraulic fluid and system heated quicker which is a help when it's frigid out.
|
|
| |
|
Wi | Same as Agcos or a bit different? Did they have as many issues with them? Went through a pile of them on Tier 3 8600s. Not due to anything with heating though, just sending unit issues.
Edited by durallymax 1/5/2018 02:38
 (IMAG0016.jpg)
Attachments
----------------
IMAG0016.jpg (103KB - 91 downloads)
|
|
| |
|
Southeastern Tipton County, Indiana | durallymax - 1/5/2018 03:36 Same as Agcos or a bit different? Did they have as many issues with them? Went through a pile of them on Tier 3 8600s. Not due to anything with heating though, just sending unit issues. Looks similar to the WEMA CNH uses with the exception of the flexible suction hose, and yes we had a lot of trouble with the early ones, cracked suction pipes and poor seal of the ports in the upper part of the head. We were told to seal them using a non-silicone based, non-hardening sealant that would remain flexible, but not told where that miracle product could be obtained. They can be disassembled and resealed with updated seals if a suction leak is the only problem.
Edited by Jim Naden 1/5/2018 05:24
|
|
| |
DEF - Freezing on NH T7.170
