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I've had this 451 for years, bought it used. The push bar arm, the part that has the hole in the front, that the pivot drive assy goes into, has always been loose, like it's been bent towards the front direction. There's at least a half inch of clearance between the front of the pivot drive assy...

My 2020 valves started leaking after I added some air last month. So yesterday I took out the old stems which were in pretty sad shape. I had to use the 'remover' with a bit of added force from some channel locks, but was real careful and used a lot of WD40, running them in and out until I got...

My parts book lists everything from 160/180/192/205° for the thermostat with no notes. Which one is it? Cleaning up my garage today I found a Stant 36309 195° thermo that I think I bought years ago for the 2020. Seems I read somewhere that the diesels like to run hotter than the gas. I think...

I was looking at this Amazon.com: Titan Attachments Clamp On Pallet Forks with Stabilizer Bar 43" Pair Heavy Duty: Home Improvement Looks like I can also get it directly from 'titan attachments' for $204. All I want it for is mainly to pick up my Simplicity Z2050 which I can put in the bucket...

My 2020 has 16.9-30 tires on the rear. According to the tach, at 1500rpm the 'speedometer' indicates a bit more than 3 mph in 5th gear. Now I can walk 4 mph. And in 5th gear while mowing with the NH451 mower, the tractor is running along at what I would consider a good jog, certainly more than...

I posted in Attachments but got no takers. I'm replacing all the sections and double guards on this old 451. I did it before 5+ years ago. What I didn't like before was I had to take a large pipe wrench and long heavy EMT tube as an extension to bend the guards up to meet the sections. I know...

OK, second time replacing the guards and sections on my 7' 451. I have 2 cutter bars that I switch between in case I break a section. The sections are pretty worn out by now and pretty dull. Couple weeks ago before it started raining, it was real dry so I cut about 10 acres and it was working...

I seem to have lost the front half of the PTO shaft for my ancient 'Rebel' 5' bush hog. I was looking at this Amazon.com: Complete Tractor New 313-623 Universal PTO Driveline Compatible with/Replacement for Rotary Mower 146542 CS511SM PM146542: Automotive, will it hold up to the 2020 HP or do I...

Oh, boy it never ends. After the injectors, the fuel filter, the radiator this summer, I go out to start it after the snow yesterday and 'click', 'click'. So I figure the battery contacts need cleaning. Clean all 4 of them and same thing. So I get the voltmeter out and measure voltage while...

I got my new injectors in and some new parts on the return line, everything back together, changed the fuel filter. I even heated the engine for a while with the heater so it was warm. Cranked it and it started right up, a little slower than before, but of course there was some fuel missing in...

Was out mowing with the IH451 yesterday. It started sounding funny, like one of the cylinders maybe wasn't firing, sort of a thumping sound, so I put it in the barn. I didn't notice any lack of power that I could tell. Got it out again today and finished mowing, maybe 3 hours worth and it still...

Should I bust a gut and head into the JD store to buy their 'Cool Guard II' or whatever it's called or should I just use a good brand rust inhibiting antifreeze at wallyworld like prestone? Is the Prestone cleaner OK to use in the 2020. New aftermarket radiator and cap including hoses installed...

I'm driving the 2020 to the south field to mow and bang, a puff of dust from the front and I hear the fan blades hitting on the shroud. Immediately shut it off. Get off, take a look and stuff is pouring out of the radiator. Well, I can't leave the tractor in the middle of the field, so I start...

Today my batteries won't start the 2020. Two Walmart Maxx 34N, 36mo prorated warranty. I bought them in 2014 for about $100 ea. so they're 6 or 7 years old. I guess that's pretty good. It's about my only option locally unless I go to Autozone or a auto store. Supposedly 800CCA. I keep a smart...

I was reading another thread on using the load control for grading the driveway (gravel). I've never used my load control as I really don't know how to. Can someone tell me if that's something I can use effectively. My drive is about a half mile long, maybe 8-10' wide and I'm using a JD 45...

The oil seal on my crankshaft is missing after I pulled off the sheave to adjust the bearing. Is that bearing supposed to come off the crankshaft to the rear or is mine just a bit rusty? There was a lot of grass in there. I ordered a new seal, but does that castle nut tighten on the seal the...

Belt broke on my 451 mower because the grass got in the sheave under the v-belt, so while it was off, notice the crankshaft assembly and sheave are loose. So I get the puller out and luckily it was easy to get off with a little heat, but I could not get the cup or cone of the tapered roller...

Mine carriage bolt broke and of course I lost the lock washer so I got a new one figuring how hard could it be to buy a 5/8-11 x 2 1/4 Gr5 carriage bolt. Turns out not easy. So I ordered one from ebay for $14. But what I'm wondering is how it's installed. The washer part is 63752 and bolt is...

Couple weeks ago the alternator (idiot) light didn't go off after I started the JD2020. Usually it comes on after turning on the ignition, goes off while starting and then usually stays out while running, normal operation. This is a 3 wire alternator, Field, Positive, and Output. The Field and...

Last August the front bearing on the Moto alternator started screaming, so I bought one of those $90 chinese wonders from ebay. Well yesterday, after I started it the red light stayed on. Tried couple more times and revving it too, nothing changed still red. Well after I backed the tractor out...

Trying to replace the washer and o-ring. Looking at the picture vs the book, I'm not sure what's going on here. I think item 5 in the picture is 30 (retainer?) in the tech manual page 30-9 fig 11. 4 is 22 (load shaft), 3 is 2 (retaining ring), 2 is 3 (retaining bushing) and 1 is 6 (load control...

I've had this Z2050 since 2004. I've got less than 550 hours on it and already one of the motors/pumps is slow. I have a verrry hilly location and prolly wore one side out mowing on the hillsides. How can I tell if it's the pump or motor? Is it a huge project to change either or both? They are...

So I ordered a bunch of parts for the load control o-rings and seals and at the same time I ordered a rockshaft repair kit involving a bunch of rings and seals for the rockshaft cylinder. Also the rockshaft housing gasket. While I'm in the rockshaft trying to flush the metal crap, what will I...

Last year I fixed about 3 major leaks, one on the engine oil pan and 3 in the hydraulics, the PS, front PTO seal and the seals in the pressure regularor valve. So now it's nearly leak free, but changing the hyd oil filter today I notice I've got a leak right under where the left drawbar arm...

So after 20 years or so of pulling myself up with the steering wheel and the fender on my 2020, I decided it was time to get the proper step. So I get this thing which is listed in the parts book, same part numbers AA692R Tractor Step With Bracket JDS759STP For John Deere 244 263 264 284...

So the 2020 is nearly leak free at this point. However, the tach cable where it enters the housing near the oil pressure sensor leaks, not real bad, but bad enough, better than it was. When I last had it off, I used some Permatex Ultra Black (maximum oil resistance) on the threads which I also...

I've been watching the 'Red Green Show' too much, so I thought what the heck. How about some sort of saw I could easily attach to one side or the other on my JD 145 loader bucket? I was thinking an electric reciprocating saw with replaceable blade might work, of course a hydraulic rotary saw...

I've got the hyd fluid all drained and I look for the mid-pto seal and I see what looks like a cover on the seal, but I haven't pulled it off. Is that what this is, I don't see any indication of it in the parts book. Does it just pop off? Hope it's OK to post links to pics here.

I know there's been metal in my hyd oil since the day I replaced the main hyd pump because the brakes had worn down to the metal. That was about 25 years ago, a few years after I got the thing. I flushed the trans as good as I could which was not good enough, but I've been placing rare earth...

So, now I've got the oil pan leak free, the hyd pressure control valve leak free, it looks like my next leak to fix is the PS leak. Appears to get a lot of oil coming from up where the steering shaft arm connects into the clutch housing, up where it can't be seen from below the tractor. Is this...

The mid pto drips, it's on the bottom front of the trans. Is the seal right there around where I'm looking at the pto shaft or is it mounted internal? It's hard to figure from the book. If it's on the outside, I suppose I can just put a screw in it, pull it out and install a new one with some...

I've got a pretty good leak at the top of my pressure control valve. Looking at the parts book, there are 2 o-rings that don't seem to go inside the unit. Do they go between the valve body and the transmission, letting oil out/in the PCV into the rockshaft? If I take the 3 bolts off the PCV, I'm...

The 145 loader keeps creeping up. The 3 pt hitch and the 145 will not stay up when the tractor is off. I've got the Technical Manual and looked at the rockshaft rebuilding section. Looks like perhaps the return piston is leaking? Will this make the loader creep when running or fall when tractor...

The bucket on the 145 keeps creeping up from the main rams. Is this a matter of rebuilding one or more of the rams to stop it from creeping? They also will not stay up when stopped, they always leak down. The tilt also has a dead spot going down near the end, it will finally go through by...

I seem to have my mower cutting pretty good now, but the lift cable broke. I had used a 1/4" steel cable with the saddle clamps and it was always touch and go, plus this is the second one I've broken. I'm going to try a 3/8" cable, can someone tell me what size the cable actually is? I've...

I've noticed that when changing the oil in my JD, when I put the recommended amount in, 6 Quarts with filter, the dip stick measures well above the full mark when cold. When warm, it's right on the top full mark. Which is right, check it cold, or warmed? I'm not sure the book says anything about...

New here. I've had this 451 for probably 10 years, I'll try to make it short. I've replaced the blades and guards on this mower for the second time now this spring. Trouble is I can't get the knife blades (sections) down on the guards. When I bend the guards up to meet the sections, only the tip...