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  #1  
Old 11-08-2015, 08:20 PM
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105_Tom 105_Tom is offline
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Default Kubota G5200

Yeah, it's definitely 'Off Topic', but I wanted to share since it's powered by the same D600 that's in many of our Smokers.

I had spied this tractor back in the spring along the railroad tracks, and stopped the train on a subsequent run to inquire about the status. The PO said it had just up and quit on him while he was mowing, and he left it sit exactly where it had died. He wasn't interested in selling it at the time, as he claimed he 'knew somebody that knew somebody' that was gonna work on it for him, but we traded numbers anyway, in case he changed his mind. Well, all summer went by, and you know that tractor didn't move an inch (unless you count it sinking further into the yard) so, I called him and made a second pitch as to why he should let me make him an offer before the winter set in and ruined what was left of the tractor. He bit, and I picked it up last weekend.

I got it for a Lew price, knowing from my initial inspection from the first time I'd stopped to look at it that it had been run out of oil and that the motor was tight. I figured the wheel weights and mower deck were alone worth what I gave for the whole tractor, so it was worth the gamble. I used my 2084 as a mule to pull it up a hill and onto my trailer. After I loaded it up, I stopped at the first gas station where I could pull over out of the way and do a little work. I pulled the glow plugs and injected some MMO to soak in for the hour ride home, making sure I had put enough into each cylinder to at least cover the pistons. Upon arrival at the house and getting the tractors unloaded, I got my big pry bar and went to work on the cast driveshaft knuckle and the flywheel teeth next to the starter, and had it broke loose and completely rotating within five minutes. I added enough oil to show on the dipstick, and then jumped the starter and it rolled over nicely with what sounded like even compression between the three cylinders. After picking up a set of keys from the local dealer and charging the battery, I had it cranking on it's own and eventually got it to fire and run for a few minutes before voluntarily shutting it down for good.

It's got a bad oil leak on the corner of the head where the oil galley comes out of the block - looks like it's a pretty common leak on these motors, and I'm guessing the O-ring is either missing or has failed. It has the big 48" mower deck which is in very good shape - no doubt account of the oily grass that has kept it from rusting out as you see so many of these HST decks do. The tractor is not in bad shape overall - just needs some TLC and a serious degreasing. I got it washed this weekend, but have not had a chance for 'after' photos yet - too busy doing battle with the leaves. It cleaned up well, and wow - these Kubotas are built like little tanks! Gonna pull the head early this week and look for physical damage or other red flags before I commit to a gasket kit. Need to see if the cylinders are roached due to the oil starvation, but it certainly seemed to have plenty of compression and ran pretty good while I had it going. This one could potentially stay around if the motor can be saved...
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File Type: jpg Kubota G5200 (14).jpg (28.5 KB, 273 views)
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File Type: jpg Kubota G5200 (16).jpg (28.1 KB, 269 views)
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  #2  
Old 11-08-2015, 09:00 PM
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olds45512 olds45512 is offline
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a local dealer had one that was mint that was traded in on a new tractor, i liked it but not the $2000 price tag. congrats on your score.
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  #3  
Old 11-08-2015, 10:24 PM
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Alvy Alvy is offline
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Yeah I've always liked those Tom, nice story too. Just saw one at my local show this weekend for $1100.00 and yours looks better, great score
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Old 11-09-2015, 09:44 AM
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The Kubota G's are awesome machines.

I picked this beast up for $400 at my Cub dealer, put a few hundred in it and ended up selling it because it didn't have power steering. It had a D722. This thing was every bit as powerful as my B7500 when mowing grass.
DSCN0944.jpg


I just picked this one up off of CL. Owner had it listed for $125 but I felt bad getting it that cheap so I gave him $150 and he was happy as could be. It had a poor connection in the wiring and the D662 runs great. I'll probably sell this one too.
DSCN1823.jpg

I'm always looking for these little Kubota's. They're great machines.
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Old 11-09-2015, 03:42 PM
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Here's the post-wash pictures:



Beefy rear end and hydro!


Pre-op pics:




Pulled the valve cover off and learned why the retaining caps were 'pumping' while the tractor was cranking and running but hey, it's a learning experience. Next time I'll pull the valve cover as soon as I see that going on. I probably could have saved the stud, but oh well...


The cylinder bores look great! No scoring, no piston damage or signs of contact... The head is also free of cracks or any physical damage other than the broken rocker stud.


The O-ring and galley pipe were indeed missing, explaining the massive oil leak. I ordered all the parts I'll need from the Kubota dealer, including a primary fuel filter that I'll change while the fender pan is off. I've heard that running the red fuel requires a more frequent filter change than the non-dyed stuff, and this tractor had been on a red fuel diet as there was an off-road pump at the station near the PO's house. I also tested each of the glow plugs right off the battery, and all 3 turned red within 12-15 seconds. I still can't get the indicator to heat up and start glowing, even though I have 12v at the glow plug wire.

I gave the head to my father to extract or drill out the broken stud. He'll square it up in a Bridgeport milling machine and have it cleaned out and ready for the new stud. Fingers crossed that it backs out with a reverse drill bit or E-Z out.
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105, 149 w/44A, #2 & #4 carts
782 CCC Red w/44C
1512 Smoker w/50C, 450 Blower
2072 w/60" Haban
IH/Lawnboy 3322 Pusher, Scag TT 61"
JD 455, X495, Kubota 2150, Gravely 450, 812
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Old 11-09-2015, 03:49 PM
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Todd, the simple yet rugged design of this tractor just keeps surprising me. I'm really hoping that I didn't miss anything in the disassembly that would otherwise cause this project to be doomed. I'm looking forward to getting this one back together and learning along the way. These orange tractors aren't nearly as good looking as our Cubs, but they sure are built to last.

This one has 1850hrs, btw. I think I forgot to post that. Also, the head bolts look to have the gray anti-seize on the leading threads. Should I coat the head bolts on these?
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105, 149 w/44A, #2 & #4 carts
782 CCC Red w/44C
1512 Smoker w/50C, 450 Blower
2072 w/60" Haban
IH/Lawnboy 3322 Pusher, Scag TT 61"
JD 455, X495, Kubota 2150, Gravely 450, 812
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Old 11-09-2015, 06:45 PM
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That's a sweet mower! Can't hardly beat a kubota. My pops has an early 80s with a big woods deck with 3 pt and rear pto 2wd,I put a new radiator in it and o rings at the injection pump runs like a dream, I'd love to have one like the one you scored! I have a B21 with front end loader and back hoe it was the most rugged commercial duty machine I could find at the time over all the other manufacturers, and I'm pretty aggressive about buying US buy sometimes...
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Old 11-22-2015, 08:46 PM
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After waiting an eternity for the O-ring that was needed for the head job, I was finally able to get things cleaned up and reassembled this weekend.

Cleaned head


Cleaned block


With head gasket and O-ring installed


Top side with new rocker stud installed


And got the rest of it put back together...but it won't run. Now, I don't want to be that guy who can't get his diesel started, but alas, I am for now. I put a new primary filter on, and in the change process, noted a full and easy flow of fuel from the tank. The fuel pump runs with the key, I bled the secondary filter from both bleeders as described in the service manual, and also bled from the single bleeder on the injector pump. I bled from each injector line at the injector until I got regular pulses of fuel from the fittings - but I did not tighten the lines while the engine was cranking. I have good battery grounds, and have been cranking with the existing old battery from 2010 (tested way to the good with the battery tester - 475 amps under load - and with a brand-new battery with 510 cranking amps. I can only get white puffs and a weak attempt to catch and run. And the cranking duration is less than 15 seconds before the battery wipes - even on a boost charge or on jumper cables from my truck. So I'm a bit stumped and frustrated at this point. Glow plugs were bench tested while I had the head off and are getting 12V to each, even though the glow plug indicator isn't working - it has the same exact voltage on each terminal, but it won't light up or get hot. I'm thinking the next logical step is to order the gear-reduction starter so I can at least get a longer crank duration. The access to the starter is wide open on this tractor versus the way it is on our Cubs - 15 min job, tops.

I really hope I don't have an injector or injector pump or timing issue - it ran well before I pulled the head, so I'm hesitant to want to open up the pump for anything. I was hoping this was going to be a cheap and easy fix, but... It's gotta be something simple, right? It's just air...and a spray of fuel at the right time. What else could it be?
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105, 149 w/44A, #2 & #4 carts
782 CCC Red w/44C
1512 Smoker w/50C, 450 Blower
2072 w/60" Haban
IH/Lawnboy 3322 Pusher, Scag TT 61"
JD 455, X495, Kubota 2150, Gravely 450, 812
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Old 11-23-2015, 06:19 PM
J-Mech J-Mech is offline
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Ummm....... Why do each of those pistons have a mark on them that looks like the exhaust valve was smacking them?

You sure you have the valve lash set correctly?

You sure that someone didn't plain that head at some point and it's supposed to have a shim, or a thicker head gasket on it?

Just because the glow plugs are getting 12V doesn't mean they work.

If the battery wipes out that fast, you either have a bad battery, or a very junk starter.
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Old 11-23-2015, 06:43 PM
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I don't know crap about diesels, but I was wondering if it was worth mentioning if cam timing is proper now that the master mechanic asked about the exhaust valves smacking pistons?
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

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