Back when I was driving a school bus, I noticed one day my temp needle would slowly rise over a period of about maybe 15-30 seconds, then drop back rapidly in 3-5 seconds, and start again. Well, from experience with my pickup a few years earlier, I knew EXACTLY what caused that-- a coolant leak. SO when I finished the route one day, I opened the hood on my old 91 IH DT-466 and took a look. Started seeing dried coolant droplet marks on stuff halfway back on the engine and hoses and stuff, and traced them back, getting more numerous and closer together, to the water pump weep hole. It wasn't leaking, but I had a strong suspicion I found the culprit, so I cranked her up and came back out and had a look... sure enough the fan and pulley were wobbling like a top. SO I shut her down and rolled the hood back and latched it. Drove over to the boss's office and told him I needed a new water pump, and why... Hand delivered the maintenance request write up because I knew our less than stellar mechanic might fix it in a year or two if a fire wasn't lit under him. Boss man asks me, "Can you still drive it?" I was like, "yeah, but when that water pump turns loose, it's going to send that 3 foot diameter fan straight through the radiator like a buzz saw!" On that bus, the fan only cleared the radiator by about maybe 2-3 inches-- nowhere near as much clearance as you had there... "Well, I'll tell the mechanic, but go on and drive it til he gets around to it. Shaking my head, I was like, "Ok, you're the boss" and went on driving it. Sure enough, about a week or so later on my morning route, near the halfway point, I slowed down to make a turn onto the last road to do a pickup before going back to the school about 3 miles away from the other end of that road. I finished the turn and started accelerating, and I hear this "BZZZZZZzzzzz!" and I'm like "Yup I know exactly what THAT is... water pump just turned loose! Fan was eating the radiator!" SO I just leaned on it for about a quarter mile, made my last pickup right quick as the steam was starting to roll, and goosed it back out to the highway about 3/4 mile away, luckily it was clear and I made my turn and hooked and booked back to the high school... I was watching the temp climb but it was okay so far... got on the radio and told the mechanic "the water pump just turned loose and ate the radiator, have a sub bus standing by for me, I'm bringing her in". I whipped into the high school and dropped off the first half of the route's high school kids, and limped her into the shop gate just as the temp needle rolled over into "HOT" territory, steam puking pretty good by then. Shut her down, herded the rest of the kids onto the old junk bus he had waiting for me, and we took off again to drop at the middle and junior high and then hit the second half of the route. Turned what would have been a day's work and maybe a few hundred bucks for the water pump and various/sundry supplies to replace it, into a couple thousand dollar job because it needed a new water pump AND new radiator after the fan ate the existing one. Plus my bus was out a week waiting on parts and repair... BUT that's how they liked to do things! Later! OL J R :)
You better believe. If you have antifreeze coming out of that weep hole. Can feel a goodly amount of play in that fan when you shake it by hand. Your on borrowed time. Till the fan tears the shroud up. Or worse the radiator and God knows what else.
@@rogercarrico4975 yup, this one I cranked up got out and watched it out was wobbling like a kid's top toy... Had another driver, he drive a semi for Frito Lay for years, get up at 3am, run a load of chips somewhere, back home at noon, grab a nap, drive a bus from 3-430/5, go home do his thing till 8-9, go to bed do it all again tomorrow... So anyway he knows what's what about trucks... His U-joint is squeaking so he writes it up and tells the boss he needs a U-joint replaced. Boss is like,"can you drive it?". He's like, "yup till it breaks down" so the boss is like "drive it till we can fix it". So he does, out on the route on the main highway thru town, drops a kid off, closes the door and hits the accelerator... PING! Driveshaft snaps and rolls out from under the bus. When it let go it wiped the air lines off the rear axle, dumping the air to the spring brakes, so now it's parked in the road. He radios, they bring a sub bus, and has to transfer 50 kids on the side of the busiest road in the county, and then take off again. Mechanic decided to crawl under the bus to put the caging bolts in the spring brake chambers to release the spring brakes so they can tow it back to the bus barn with the 1 ton. DPS trooper is directing traffic jam from hell and asks him, "whaddya think your doing?" Then after he tells him, cop says, "Nope, unsafe with this traffic, call a HD wrecker". Mechanic is starting to go under anyway, cop asks if he wants to be arrested. They end up calling a semi wrecker who Harris it back to the school a few miles away, so there went probly 2-3 grand, those HD wreckers ain't cheap! The driveshaft time was ruined, had to send it to Houston to a HD driveshaft shop to be rebuilt, weld in new yoke and rebalance it. SO what should have been a half days work and a couple hundred bucks to replace a HD U-joint turned into a bus sitting 2 weeks waiting for the rebuilt driveshaft to get back from the shop and be installed PLUS possibly 2 grand in towing... But who cares it's taxpayer money!! 😠
Had one that I couldn't hold the belt pulley. To keep it from turning. Really tight! Took some 1/4" plate Cut a slot, big enough to over the bolt heads that go through the Pulley. Welded a piece of 3/4" pipe on to it. That worked. With the left-handed threads. I suppose it just gets tighter and tighter as the engine runs.
Yeah usually the auto supply has a "socket" made out of flat plate like that with a square hole for a breaker bar to lock it up... Those d@mn fan clutches are SUCH a PITA... I used to toss them and put a "fan clutch eliminator" on them when I was younger... they used to sell an aluminum adapter that had two different size pilot holes (for the water pump shaft), two different fan hole diameters, (clutch side) and a series of bolt holes to match to the water pump pulley and holes for the fan bolts... worked great. I've also heard that if you have one getting weak and not working, you can pop off the snail spring off the front of it and it will basically lock the thing up solid for awhile and get you more time til you have to break down and replace it. Later! OL J R :)
I had to change the water pump on my 7.3 power stroke and I fought that fan clutch for 3 hours to get it off, I made sure to anti-seize before I put it back on for next time it has to come off. Its always nice to have 2 people working on something cause it sure makes it a lot easer to do. Bandit
Mine went bad on my Chevy truck.........Temp would rise to a tick or two above center......Cured that by switching to the correct Antifreeze (GM is "orange"), but continued to move up and down a half a tick....When I had the air worked on, had them look at the 'clutch fan' .....Sure enough is was bad.....Hasn't acted up since then.......
I have thought about adding a clutch to the fan on the 1973 Ford F600 then instead of getting 9 miles to the gallon I could get 9.5 miles to the gallon. 🤔
It's always good when two people can work together to get something accomplished. That engine appreciates the efforts.
Father and son video. Can’t get enough.
We have a DT466 in our grain truck, kind of a bulletproof motor, they run forever.
Nice team effort, it have a clever computer in, it potentially saved you an engine if you see the temp gauge to late
Back when I was driving a school bus, I noticed one day my temp needle would slowly rise over a period of about maybe 15-30 seconds, then drop back rapidly in 3-5 seconds, and start again. Well, from experience with my pickup a few years earlier, I knew EXACTLY what caused that-- a coolant leak. SO when I finished the route one day, I opened the hood on my old 91 IH DT-466 and took a look. Started seeing dried coolant droplet marks on stuff halfway back on the engine and hoses and stuff, and traced them back, getting more numerous and closer together, to the water pump weep hole. It wasn't leaking, but I had a strong suspicion I found the culprit, so I cranked her up and came back out and had a look... sure enough the fan and pulley were wobbling like a top. SO I shut her down and rolled the hood back and latched it. Drove over to the boss's office and told him I needed a new water pump, and why... Hand delivered the maintenance request write up because I knew our less than stellar mechanic might fix it in a year or two if a fire wasn't lit under him. Boss man asks me, "Can you still drive it?" I was like, "yeah, but when that water pump turns loose, it's going to send that 3 foot diameter fan straight through the radiator like a buzz saw!" On that bus, the fan only cleared the radiator by about maybe 2-3 inches-- nowhere near as much clearance as you had there... "Well, I'll tell the mechanic, but go on and drive it til he gets around to it. Shaking my head, I was like, "Ok, you're the boss" and went on driving it. Sure enough, about a week or so later on my morning route, near the halfway point, I slowed down to make a turn onto the last road to do a pickup before going back to the school about 3 miles away from the other end of that road. I finished the turn and started accelerating, and I hear this "BZZZZZZzzzzz!" and I'm like "Yup I know exactly what THAT is... water pump just turned loose! Fan was eating the radiator!" SO I just leaned on it for about a quarter mile, made my last pickup right quick as the steam was starting to roll, and goosed it back out to the highway about 3/4 mile away, luckily it was clear and I made my turn and hooked and booked back to the high school... I was watching the temp climb but it was okay so far... got on the radio and told the mechanic "the water pump just turned loose and ate the radiator, have a sub bus standing by for me, I'm bringing her in". I whipped into the high school and dropped off the first half of the route's high school kids, and limped her into the shop gate just as the temp needle rolled over into "HOT" territory, steam puking pretty good by then. Shut her down, herded the rest of the kids onto the old junk bus he had waiting for me, and we took off again to drop at the middle and junior high and then hit the second half of the route. Turned what would have been a day's work and maybe a few hundred bucks for the water pump and various/sundry supplies to replace it, into a couple thousand dollar job because it needed a new water pump AND new radiator after the fan ate the existing one. Plus my bus was out a week waiting on parts and repair...
BUT that's how they liked to do things! Later! OL J R :)
You better believe. If you have antifreeze coming out of that weep hole. Can feel a goodly amount of play in that fan when you shake it by hand. Your on borrowed time. Till the fan tears the shroud up. Or worse the radiator and God knows what else.
@@rogercarrico4975 yup, this one I cranked up got out and watched it out was wobbling like a kid's top toy...
Had another driver, he drive a semi for Frito Lay for years, get up at 3am, run a load of chips somewhere, back home at noon, grab a nap, drive a bus from 3-430/5, go home do his thing till 8-9, go to bed do it all again tomorrow... So anyway he knows what's what about trucks... His U-joint is squeaking so he writes it up and tells the boss he needs a U-joint replaced. Boss is like,"can you drive it?". He's like, "yup till it breaks down" so the boss is like "drive it till we can fix it". So he does, out on the route on the main highway thru town, drops a kid off, closes the door and hits the accelerator... PING! Driveshaft snaps and rolls out from under the bus. When it let go it wiped the air lines off the rear axle, dumping the air to the spring brakes, so now it's parked in the road. He radios, they bring a sub bus, and has to transfer 50 kids on the side of the busiest road in the county, and then take off again. Mechanic decided to crawl under the bus to put the caging bolts in the spring brake chambers to release the spring brakes so they can tow it back to the bus barn with the 1 ton. DPS trooper is directing traffic jam from hell and asks him, "whaddya think your doing?" Then after he tells him, cop says, "Nope, unsafe with this traffic, call a HD wrecker". Mechanic is starting to go under anyway, cop asks if he wants to be arrested. They end up calling a semi wrecker who Harris it back to the school a few miles away, so there went probly 2-3 grand, those HD wreckers ain't cheap! The driveshaft time was ruined, had to send it to Houston to a HD driveshaft shop to be rebuilt, weld in new yoke and rebalance it. SO what should have been a half days work and a couple hundred bucks to replace a HD U-joint turned into a bus sitting 2 weeks waiting for the rebuilt driveshaft to get back from the shop and be installed PLUS possibly 2 grand in towing... But who cares it's taxpayer money!! 😠
Had one that I couldn't hold the belt pulley. To keep it from turning. Really tight! Took some 1/4" plate Cut a slot, big enough to over the bolt heads that go through the Pulley. Welded a piece of 3/4" pipe on to it. That worked. With the left-handed threads. I suppose it just gets tighter and tighter as the engine runs.
Yeah usually the auto supply has a "socket" made out of flat plate like that with a square hole for a breaker bar to lock it up...
Those d@mn fan clutches are SUCH a PITA... I used to toss them and put a "fan clutch eliminator" on them when I was younger... they used to sell an aluminum adapter that had two different size pilot holes (for the water pump shaft), two different fan hole diameters, (clutch side) and a series of bolt holes to match to the water pump pulley and holes for the fan bolts... worked great. I've also heard that if you have one getting weak and not working, you can pop off the snail spring off the front of it and it will basically lock the thing up solid for awhile and get you more time til you have to break down and replace it. Later! OL J R :)
@@lukestrawwalker That's very good information! Going to put that in my memory bank.😜 I very well might need to use that one day. Thanks👍
Hello nice job did it cure the problem?
I had to change the water pump on my 7.3 power stroke and I fought that fan clutch for 3 hours to get it off, I made sure to anti-seize before I put it back on for next time it has to come off. Its always nice to have 2 people working on something cause it sure makes it a lot easer to do. Bandit
Nice repair! Changed the fan clutch on my 7.3 idi. Just went in with an air hammer and broke the threads loose.
air hammer chisel busts fan clutch nuts loose easy, just get the chisel started in the nut then angle it to turn the nut
Mine went bad on my Chevy truck.........Temp would rise to a tick or two above center......Cured that by switching to the correct Antifreeze (GM is "orange"), but continued to move up and down a half a tick....When I had the air worked on, had them look at the 'clutch fan' .....Sure enough is was bad.....Hasn't acted up since then.......
Do you know the bearing size in that fan
Good video.
Went to local parts store and rented the tool was a deposit on the fan clutch and got deposit back on both
I have thought about adding a clutch to the fan on the 1973 Ford F600 then instead of getting 9 miles to the gallon I could get 9.5 miles to the gallon. 🤔
Get you a flex fan... they work better LOL:) Or just go electric fan. Fan clutches are a PITA. OL J R :)
Le matin ne démarrer pas comment trouver cet panne
hello Boehm farm fans, come on Jacob you gotta say it everytime
This video was a split of clips from the greenhouse supply day.
👍👌🇨🇦❤
That's the easy way