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I pulled the injectors to check the head clearance, do a compression & leakdown test, and have a look at the injectors themselves. 5 of the 6 injectors are stamped "1570" and "S1", but one is stamped "1570" and "S2". Can anyone please tell me the difference if any between an S1 and an S2? Does...

Hi, can anyone tell me the thread diameter and pitch (circled in the image below), to save me pulling one of my injectors prematurely? I need to find or make a compression test adapter to fit the injector hole in my M4500DT - the injectors (15721-53020) are same as many other models apparently...

Help! This tractor is supposed to have a S2600 engine, and on the engine block beside the injection pump is the serial number "S2600-A-1599". So far, so good. HOWEVER the data plate on the pump itself reads "ND-PFR6M55/1 ND076" and "S2200". Also, the dipstick is embossed "S2200". Can anyone...

No. 4 holder is weeping (has been for months if not years - previous owner mentioned it), and I suspect no. 3 is just starting to as well - see photo. From the numerous threads on the subject I've decided to fix it myself (it's been wonderful reading the contributions of people on this forum...

Well I'm baffled as to how to get this plate and pin assembly off. I've undone the 3 bolts and smacked it with a special tool, levered it with a crowbar and sworn at it but it won't budge. I want to get it off so I can free up the the drawbar assembly lower pin (smaller pin visible below the...

I wuz looking at some pics in the WSM and noticed that some of them had "F-PTO" showing on the front end and dotted lines indicating where a cutout for the PTO would be. See pix below. Does anyone know anything about the front PTO for these tractors - was it ever offered as an option, if...

Hi all - thinking of getting a compression and leakdown test on my S2600 engine so need to remove glow plugs or injectors. Question: which is less risky? Remove glow plugs, or remove injectors? (People with the same series engines - Z751 Z851 DH1101 D1301 V1501 V1701 S2200 S2800 may know the...

Hi all, I'm trying to see the TDC mark on the flywheel (there must be one - it's mentioned in another post http://www.orangetractortalks.com/forums/showthread.php?t=26009&highlight=timing+S2600) but danged if I can see any mark, nor can I see any pointer to line the mark up to. I'm looking...

My operator's manual doesn't say what tyre pressures should be used. Weird. However the Workshop Service Manual has the info. So for those without a WSM, I hope this is useful: "For usual works except for front loader work Front tires 6.00-16-6PR = 340 kPa 48 psi (M4500 and M5500) 7.50-16-6PR...

Hi I've recently bought a M4500DT and joined the forum. Can anyone please tell me what the "A/AC type" means that you see on the covers of some of the M4500/M5500/M7500 manuals? Other manuals don't include it, and on the WSM I got it implies that a non-A/AC type is different. Thank you. PS...