Jacobsen mower overheating?
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Topic: Jacobsen mower overheating?
Posted By: Tracy Martin TN
Subject: Jacobsen mower overheating?
Date Posted: 24 Apr 2023 at 9:50pm
My Jacobsen mower overheated Friday. It has a inline 4 cylinder Ford engine, VSG 41111 -6007-b in it. Over the last year it would occasionally get to 220 if hot day and hard mowing.Got up to 240 degrees. I cooled it down washed out radiator and it started climbing again. Let it cool down, took out thermostat and tried it today, still overheats. Fan belt tight, full of coolant , no bubbles in top of radiator with cap off. What is most likely cause, water pump? I think radiator is okay. I am going to flush system very soon. Thanks Tracy
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Replies:
Posted By: D19allisowner
Date Posted: 24 Apr 2023 at 11:00pm
I would start by giving the cooling system a good flush first. Mabe possibly a head gasket going out but I'm no ford expert.
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Posted By: Tracy Martin TN
Date Posted: 24 Apr 2023 at 11:10pm
Radiator was boiled out when I put it on a couple years ago. I didn't see any bubbles in upper tank with it running, hoping it wasn't a head gasket. I will flush it out good and go from there. I was thinking maybe the water pump was going bad. This engine is used in Tennant floor sweepers and such. Thanks, Tracy
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No greater gift than healthy grandkids!
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Posted By: DiyDave
Date Posted: 25 Apr 2023 at 4:52am
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flush it out, then take an IR thermometer and start checking temps here and there...
https://youtu.be/KoT-PWg8Ahs" rel="nofollow - https://youtu.be/KoT-PWg8Ahs
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Posted By: jaybmiller
Date Posted: 25 Apr 2023 at 6:11am
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from the info, newer rad,flushed,tight belt, full of coolant, no stat.. Only way I can think is ...NO flow = overheating.....so I'd say water pump.
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Posted By: truckerfarmer
Date Posted: 25 Apr 2023 at 6:45am
Couple of questions. First, you washed out the radiator. Did you just use the garden hose, or did you use some pressure? Just running water through it without pressure doesn't get the stuff that's caked on.
Second, have you tried a new thermostat? No thermostat will cause overheating also. Without a thermostat, water flows through the radiator to fast and doesn't get a chance to cool down.
Fought a similar problem on my TL12 loader. New radiator, new head gasket. Still overheating. Finally took thermostat housing off. No thermostat!. Put in a thermostat, problem solved.
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'53 WD, '53 WD45, WD snap coupler field cultivator, #53 plow,'53 HD5B dozer
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Posted By: SteveM C/IL
Date Posted: 25 Apr 2023 at 7:23am
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Use IR gun first to confirm it's hot.
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Posted By: Tracy Martin TN
Date Posted: 25 Apr 2023 at 8:59pm
Took the pump off today. It seems OK, but it sure is mickey mouse looking.. I am going to flush it good with a radiator flush. It has lots of rust crude particals in it. Probably going to replace pump while I got it apart. It is not at a handy place to work on either. I will keep you posted.Hoping it aint a head gasket. Tracy
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No greater gift than healthy grandkids!
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Posted By: DaveKamp
Date Posted: 25 Apr 2023 at 9:35pm
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VG-411 is the 'Valencia', that's a 1.1L four.
Lucky for you, it's not the 172/192 four... they had terrible problems with steam pocketing.
Do all that you're doing, then verify that your mechanical advance and vacuum advance are both functioning properly, and your base is 6deg BTDC. mechanical is 3-9, and vac is 12-30. If one or the other, or both aren't functioning right, it will NOT be happy.
Here's the specs sheet:
https://www.wincogen.com/wp-content/uploads/PD/Engines/ford_vsg-411_413_specs.pdf" rel="nofollow - https://www.wincogen.com/wp-content/uploads/PD/Engines/ford_vsg-411_413_specs.pdf
and the service manual can be downloaded here:
https://www.manualslib.com/manual/805435/Ford-Vsg-411.html" rel="nofollow - https://www.manualslib.com/manual/805435/Ford-Vsg-411.html
Foley Engines is where I'd look for Ford Industrial engine parts- they know those engines well.
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Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
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Posted By: Tracy Martin TN
Date Posted: 26 Apr 2023 at 9:11pm
I flushed out the block and radiator with a garden hose this afternoon. Will fill it with water and Blue Devil radiator flush, get it up to temp and run it a hour or two, cool it down and rinse the flush out. It had a lot of crap in block and radiator. Washed out radiator fins behind oil cooler too. It has dirt and grass in it too. Another day or two before I will be done with what little time I get on it. Thanks, Tracy
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No greater gift than healthy grandkids!
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Posted By: Tracy Martin TN
Date Posted: 29 Apr 2023 at 8:20pm
I put Blue Devil in her today and ran about two hours. Pretty sure my sending unit or temp gauge is bad. Just after a couple on minutes the gauge pegged at 300. Using my infared thermometer it all checked good. Top of tank was hotter than bottom. Flushed the Blue Devil out from both directions. What is easiest way to check temp gage and sending unit? Thanks, Tracy
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No greater gift than healthy grandkids!
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Posted By: DiyDave
Date Posted: 30 Apr 2023 at 4:40am
Take the SU out, put it in a can of water, boil with a torch, check temps with the IR thermometer...
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Posted By: DonBC
Date Posted: 30 Apr 2023 at 1:08pm
Have you checked the timing
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Posted By: Tracy Martin TN
Date Posted: 30 Apr 2023 at 6:43pm
It is the sending unit. I turned key on and fiddled with sending unit wire. It would peg out at 300 some places, wiggle it some, drop back to zero. Tried tightening it up and threaded stud is loose. Easy to get to though. Thanks for all the advice. Tracy
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No greater gift than healthy grandkids!
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Posted By: Tracy Martin TN
Date Posted: 04 May 2023 at 7:11pm
I put in new sending unit and filled her up with coolant. Ran right at 170 while mowing. I am happy again! Thanks, Tracy
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No greater gift than healthy grandkids!
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Posted By: Tracy Martin TN
Date Posted: 15 May 2023 at 8:30pm
Spoke too soon, got hot on me yesterday. I think the thermostat stuck. Cooled off, started and ran around 205. Going to flush it again. New thermostat, and have radiator rodded. Going to check coolant for combustion gases also, could have a blown head gasket. Tracy
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No greater gift than healthy grandkids!
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Posted By: Tracy Martin TN
Date Posted: 27 May 2023 at 8:10pm
Checked coolant tank for combustion gases, none found. Did flush system again,then flushed out flush really good. Bought a new thermostat and drill small hole in flange. Checked it in pan of water. It tested OK installed it.. Had the radiator boiled out, radiator guy tested flow and said it was as good as a new one, no need to rod it. Installed it. Filled up system and ran mower for 15 minutes, never above 175. Mowed with it for 3 hours and never above 175. I think I got it fixed, sure feels better seeing it run cooler. Tracy
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No greater gift than healthy grandkids!
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Posted By: jaybmiller
Date Posted: 27 May 2023 at 8:53pm
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whew ! that's good news... i was kinda running out of ideas ..... Jay
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Posted By: steve(ill)
Date Posted: 27 May 2023 at 9:24pm
Tracy, my son has a Side x Side that has a 180 degree thermostat and a sensor that turns the radiator fan on when the cylinder head gets to 205 degrees.... then the IDIOT light comes on at 210 !! ...... We hot wired the fan to run constant... Now the temp is 170 degrees all the time .......... Keep fan operation in mind !
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