Author	[Modern View]
SCOTT MACFARLANE 08-29-2012 08:33:02 12.208.38.138 Report to Moderator	GOT A 4455 THAT IS GETTING HYDRAULIC OIL INTO THE ENGINE CRANKCASE AT THE RATE OF 1 QUART PER HOUR. TRACTOR HAS 12000 HRS ON IT AND HAS HAD A NEW REAR MAIN SEAL INSTALLED BECAUSE OF SAME ISSUE. AFTER NEW JD MAIN SEAL WAS PUT IN ENGINE RAN FOR 12 HOURS CUTTING HAY AND WAS FOUND TO BE 13 QUARTS LOW ON ENGINE OIL...ENGINE OIL WAS TOPPED OFF AND NOW THE HYDRAULIC OIL IS GETTING INTO CRANKCASE...ANY IDEAS BEFORE WE SPLIT IT AGAIN? [Reply]   [No Email]
Tim S 08-30-2012 07:20:21 75.60.207.0 Report to Moderator	Re: 4455 HYD OIL GETTING INTO ENGINE in reply to SCOTT MACFARLANE, 08-29-2012 08:33:02   When ever I have a problem like this I first test it (as it is split with the flywheel off) with a "clean" shop vac that I keep clean just for testing, I stuff the hose into the oil fill port, plug the valve cover breather and turn it on to "blow" this gives about 5psi of high volume/low pressure air into the crank case,,then with a spray bottle of Joy soap and water start spraying and looking for bubbles,,very simple and works "very" good,,"Hill-Billy Technology" I do this after replacing a rear seal and on all out of frame O/H"s...works in a lot of other applications too.... [Reply]  [No Email]
Tx Jim 08-30-2012 03:38:18 67.142.163.25 Report to Moderator	Re: 4455 HYD OIL GETTING INTO ENGINE in reply to jlg, 08-29-2012 08:33:02   Quoting Removed, click Modern View to see WTW When did you go to work at Waterloo?? [Reply]  [No Email]
WTW 08-30-2012 07:06:07 204.12.185.249 Report to Moderator	Re: 4455 HYD OIL GETTING INTO ENGINE in reply to Tx Jim, 08-30-2012 03:38:18   November 1997 [Reply]  [No Email]
WTW 08-29-2012 21:04:31 204.12.185.249 Report to Moderator	Re: 4455 HYD OIL GETTING INTO ENGINE in reply to SCOTT MACFARLANE, 08-29-2012 08:33:02   Scott, Been working on John Deere tractors for 35 years. I have seen this problem three times. All on 55 series tractors. The first one was in a John Deere dealership shop that I was managing at the time in the 1996. The tractor was split three times before I found the leak/path the oil from transmission was passing through to get into engine. It was not the rear main engine crank seal, or seal housing gasket, or pan gasket, or the sealed flywheel bolts that retain flywheel to crankshaft (sorry guys you are all wrong on this one) as all were replaced and resealed several times without correcting this leak. With that said there is only one area where the transmission oil comes close to the the engine and yes it is at the back of the engine. In all my cases I found that there was a hollow crankshaft flange dowel pin, that is capped at the exposed end, that cracked right at the surface of the crankshaft mounting flange. This surface is where the flywheel mates to the crankshaft. At the back of the flywheel, the center bolt area is pressurized with transmission lube oil that is used to lubricate clutch shaft pilot bushing. Lube oil pressure being exposed to the flywheel bolts and dowel pin area was being forced through dowel pin side via crack in side of pin. Normally this dowel pin is a solid pin. Why they used this hollow capped pin I do not know. I was able to pull cracked/hollow dowel pin from crank shaft flange with a pair of pliers. The new replacement pin is solid. If you find this to be your problem it would be the forth case I know of with the same problem. Long story short split tractor, inspect, and replace crankshaft dowel pin. Good Luck, Hope this is your final fix, DW [Reply]  [No Email]
DEEREMEYER1 08-29-2012 21:40:07 71.50.25.139 Report to Moderator	Re: 4455 HYD OIL GETTING INTO ENGINE in reply to WTW, 08-29-2012 21:04:31   I've read this question several times and I have to admit that I don't know what the situation actually is. The way I read it, this tractor has transferred oil both ways, which is why I suggested a real seal. I assume the tractors you've seen do this are QR tractors, and about all the ones I've worked on were PS, which may be why I've never seen what you described. I guess I may be "all wrong", but at this point, I don't see how anyone can say what it is for certain without more information, and even then it's up in the air til it's split and looked at. I'm not saying you're wrong, and I guess I'd appreciate the same courtesy. More than likely we'll never know, as this looks to me like one of those driveby questions that get asked and then the asker disappears forever. Oh well, all we can do is try to help. [Reply]  [No Email]
WTW 08-29-2012 22:30:14 204.12.185.249 Report to Moderator	Re: 4455 HYD OIL GETTING INTO ENGINE in reply to DEEREMEYER1, 08-29-2012 21:40:07   Sir, No disrespect intended. Did not mean to torque your nut. The tractors I had this happen on were all 15 speed PowerShift. This is a rare problem and was difficult to figure out. Not saying I know any more than the next guy, Just somtning I have found working at dealerships the first twenty years of my career, before I went to work in Waterloo writing tech manuals and trouble shooting new tractors problems for dealer Techs when they post DTAC cases for assitance. Hopfully The genttleman will repost and report his findings. Right or wrong diagnosis! [Reply]  [No Email]
DEEREMEYER1 08-29-2012 09:25:38 71.8.242.10 Report to Moderator	One more thing... in reply to SCOTT MACFARLANE, 08-29-2012 08:33:02   Check your transmission fill cap and make sure the vent is open. If you're building pressure in the transmission housing because of a plugged vent that's going to contribute to your oil transferring problems. [Reply]  [No Email]
DEEREMEYER1 08-29-2012 09:08:02 71.8.242.10 Report to Moderator	Re: 4455 HYD OIL GETTING INTO ENGINE in reply to SCOTT MACFARLANE, 08-29-2012 08:33:02   It basically has to be the rear seal. Did you replace the seal housing when you replaced the seal? That is a must on those engines. That's the only place where hydraulic oil and engine oil can meet. Always replace the aluminum housing when you do the seal. [Reply]  [No Email]
DEEREMEYER1 08-29-2012 09:19:25 71.8.242.10 Report to Moderator	Re: 4455 HYD OIL GETTING INTO ENGINE in reply to DEEREMEYER1, 08-29-2012 09:08:02   Some guys don't pull the housing because they're worried about tearing the pan gasket and having to pull the pan, but you can cut out a section of a new pan gasket and "splice" it in under the housing when you go back together. If you do it neatly and carefully and trim it to fit around the block corners and use a little dab of sealant at the seams (I use spray Hi-Tack to stick it to the pan and a little dab of silicone at the seams, it will work fine. I've done a lot of them that way with no problems. [Reply]  [No Email]
Tx Jim 08-29-2012 09:05:59 67.142.163.20 Report to Moderator	Re: 4455 HYD OIL GETTING INTO ENGINE in reply to Tx Jim, 08-29-2012 08:33:02   Rear engine crankshaft seal wasn't properly replaced. [Reply]  [No Email]