my dpf inhibit switch comes on when i start the engine and can not be turned off. is that normal? if i push the switch with the igniton on. tbd light still stays on. not sure how this switch is suppose to indicate... the engine and tractor operate fine with the light on., i want to know if this is on permanent inhibit mode.
L4701hst DPF inhibit switch opetation
- Thread starter Maschwar
- Start date
It is confusing because it depends on the age of your tractor. And what you mean by dpf switch and light. The earliest L60 and L01 tractors automatically inhibited regeneration unless you pushed the button. The next year they changed the appearance of the buttons and made it so the tractor would automatically start regen if needed, provided the rpm was high enough and the engine warm enough.
Have a look at the 2 pdf files in the first page of this thread, they've got some pictures and tell us what switch and light you are describing and also the appearance of the button, eg does it have a diagonal line through the symbol.
www.orangetractortalks.com
Have a look at the 2 pdf files in the first page of this thread, they've got some pictures and tell us what switch and light you are describing and also the appearance of the button, eg does it have a diagonal line through the symbol.
DPF operating hints: calling all owners of new tractors
After reading lots of posts where people were not sure what was involved in managing a new Tier IV tractor outfitted with the emissions reduction equipment, and remembering that I had a lot of trouble making sense out of the directions in the operator's manual, I started a thread (see sticky in...
www.orangetractortalks.com
NCL4701
Well-known member
Equipment
L4701, T2290, WC68, grapple, BB1572, Farmi W50R, Howes 500, 16kW IMD gen, WG24
I believe my L4701 was mfg in 2019 but I’m not with it currently and could be wrong. If yours is older or newer referring to your manual may be advisable.
At least so far for my L4701 so long as I increase rpm to steady the yellow blinky light when it blinks at me and don’t throttle down until the yellow light goes out about 15 minutes later there’s nothing to a regen. I had it regen once when running a stationary chipper and it was almost done before I knew it started. I have shut it down 5 minutes into a regen, which is a big no no, I believe, but it blew a hydraulic line and I was being showered with copious amounts of hydraulic fluid so yes, I shut it off without pondering the Tier 4 ramifications. Even then, when restarted post repair two hours later, the regen picked up where it left off and finished normally.
If I did it right, the salient pages of the manual which came with mine should be attached to this post. At least on mine, detailed instructions are also on a rather large sticker in the left fender. If There are a few important points.
1) If regen is inhibited for too long, nasty things start to happen. Alarms start sounding, dash lights flash, and the dreaded limp mode renders your machine an impotent useless victim of Tier 4. I have no clue how long “too long” is and I much prefer to never find out. You MUST make the Tier 4 stuff happy.
2) After about 5 regens, I have no experience with anything other than the auto regen. So I’m not a great source for other and odd scensrios.
3) The manual makes it pretty clear once you get outside auto regen there are a variety of things you can do.You can inhibit (defer to later), do a manual (forced), etc. but at that point your basically running a computer rather than a tractor. There are no redneck good old boy pro tip shortcuts. If you can’t figure it out with the manual, run a forced regen and if that doesn’t make it happy, call your dealer.
I’m pretty sure unless something really odd happens there will be at least two people who will have a conversation on this thread about how thankful the are for their pre-emission old iron. To whoever they are, congratulations. If I had a reasonable alternative, I wouldn’t have Tier 4 either despite having zero problems thus far.
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NCL4701
Well-known member
Equipment
L4701, T2290, WC68, grapple, BB1572, Farmi W50R, Howes 500, 16kW IMD gen, WG24
I just realized in all that lengthy post I made, I rudely did not answer your basic question. Unless your L4701 is set up differently than mine, having inhibit switch lit is not normal. It certainly isn’t for mine.
Probably my ignorance but I am not familiar with the acronym “tbd” in relation to a light so can’t comment on that one.
And maybe someday I’ll attach an attachment correctly without a bunch of duplicates. Maybe...
its very confusing, like who's on first, what's on second and i dont knows on third.. it says the light should be off on a start until i push it, but in my case the dpf inhibit lite is on immediately on start every time i start the engine.
It sounds like your manual describes the new version and you have the old, or you have the old and the software was updated and not the button??? As I said the key is the appearance of the button, when the tractor was manufactured, and whether the software has been updated. Please do read the pdf s I suggested, they were written to help solve the problem that the manuals are hard to follow.
NCL4701
Well-known member
Equipment
L4701, T2290, WC68, grapple, BB1572, Farmi W50R, Howes 500, 16kW IMD gen, WG24
Same here on typos; I have plenty myself.
This is what my dpf lights look like.
This is what my instrument cluster looks like (when it’s doing the pre-start light check).
If yours is different the rest of this is probably useless. Took a video but it wouldn’t post, so I’ll tell you about it.
Start tractor. No dpf lights anywhere. Press inhibit button and it lights. Press it again and it goes dark. Shut off.
Restart. No dpf lights. Press inhibit button and it lights. Shut off.
Restart. No dpf lights.
Bottom line, that’s how mine works which is consistent with what is in my manual posted above (albeit in a rather incompetent manner). IF yours is the same, you have a problem. If it isn’t, anything I could tell you is useless. I’ll post a couple more pics of the ID stuff on mine shortly so you can compare if you wish.
this 4701hst is a 2015 model. has the dpf inhibit switch and the
sounds like i have a problem. because what u described is exactly how mine looks on startup except, not when key id turnec to on or to start. the left dpf inhibit light come on and stays on.. that is my question. what is causing that dpf inhibit light to come on.. my operators manual does not address it. in fact it says the dpf inhibit light should be off and will come on when u press the dpf inhibit button. my dpf inhibit light stays on and pushing the button does not change its state. its on all the time. what is causing that light to stay on is the question.
NCL4701
Well-known member
Equipment
L4701, T2290, WC68, grapple, BB1572, Farmi W50R, Howes 500, 16kW IMD gen, WG24
If you don’t have any of the yellow dpf lights on the right side of the dash lit, you need someone (like your dealer) to diagnose it or someone with more knowledge than I have. If one of the lights on the right side near the temp gauge is lit, send a description or pic. Otherwise sounds like a trip to the dealer.
It sounds like something is wrong with the button wiring. The default on startup if you have a newer model is regen permitted, no light on the toggle button when you start the tractor. Have you used the tractor enough to see if it regens normally? I think you will have to take it back to dealer if new.
Maschwar, my L4701 HST is a 2015 also. My DPF inhibit is off (not lit) at startup. Below is the dpf inhibit switch and harness voltage test from the workshop manual (wsm) page 9-S53. You can download the WSM BY CLICKING HERE . If I was you I would run these checks and hopefully it is just a faulty switch. If it's not, the WSM should help you trouble shoot it.
Attachments
thanks for the WSM information. ive run the tractor for 5 years now. bought it new from a dealer. the dpf inhibit light was always off till recently. now its on on start and stays on, can not turn it off.. the WSM isnt detailed enough to show what powers the light and where the 12v comes from for the dpf inhibit light for the switch..
