- 1,511
- 1,178
- 113
- Location
- TN
Warning- Check your fan clutch RETAINER bolts regularly
Make sure that you regularly check those clutch retainer plates for bolts that are backing out. Mine backed out and threw the clutch material and I lost a retaining plate ( there are 3). If you look closely the retainer plates are starting to fly in picture #4. Since the retainer plate part is not available, I had to fab one out of steel with a plasma cutter.
If the clutch explodes, the fan turns much slower than the engine needs to stay cool. You risk overheating and head gaskets.
Kysor was bought by Borg Warner. Tech support at Borg is so-so, as they don't really know this product well. There were no replacement clutch material available from Borg. I had to go through Clutch Masters and use the K22 kit at about $100. I had to measure the clutch chips to determine which non-military clutch material would work. Beats spending $800 for new clutch.
Use a ratcheting 8mm wrench for the retainer bolts and add some blue loctite. Supposedly you can do this job without remove the fan or clutch housing. I did, but it was a PITA. very little room to work with and the blades obstruct the work. You can take the fan off, but this involves removing the aftercooler system and the fan shroud. Another PITA, and the connections in the aftercooler don't like to be messed with. They tear on the driver's side if you are not careful. Honestly, they should be replaced anyway. You will need to make a jig to aplly 90-120 psi to the clutch so you can get the clutch pieces in. Remove the 1/4" connector (1/4" ice maker fitting with hose) on top of the fan shroud. If you plan on doing the work with the fan and clutch in place, cut the clutch in two with a hack saw (this is the recommended approach). Use duct tape to hold the very slippery clutch pieces while you get the retainers on. Use Loctite blue to ensure the same thing does not happen again.
Here is a video I made demonstrating the clutch's response to line air at about 90-120 psi.
https://www.youtube.com/watch?v=8HYhSjc_q2o
Make sure that you regularly check those clutch retainer plates for bolts that are backing out. Mine backed out and threw the clutch material and I lost a retaining plate ( there are 3). If you look closely the retainer plates are starting to fly in picture #4. Since the retainer plate part is not available, I had to fab one out of steel with a plasma cutter.
If the clutch explodes, the fan turns much slower than the engine needs to stay cool. You risk overheating and head gaskets.
Kysor was bought by Borg Warner. Tech support at Borg is so-so, as they don't really know this product well. There were no replacement clutch material available from Borg. I had to go through Clutch Masters and use the K22 kit at about $100. I had to measure the clutch chips to determine which non-military clutch material would work. Beats spending $800 for new clutch.
Use a ratcheting 8mm wrench for the retainer bolts and add some blue loctite. Supposedly you can do this job without remove the fan or clutch housing. I did, but it was a PITA. very little room to work with and the blades obstruct the work. You can take the fan off, but this involves removing the aftercooler system and the fan shroud. Another PITA, and the connections in the aftercooler don't like to be messed with. They tear on the driver's side if you are not careful. Honestly, they should be replaced anyway. You will need to make a jig to aplly 90-120 psi to the clutch so you can get the clutch pieces in. Remove the 1/4" connector (1/4" ice maker fitting with hose) on top of the fan shroud. If you plan on doing the work with the fan and clutch in place, cut the clutch in two with a hack saw (this is the recommended approach). Use duct tape to hold the very slippery clutch pieces while you get the retainers on. Use Loctite blue to ensure the same thing does not happen again.
Here is a video I made demonstrating the clutch's response to line air at about 90-120 psi.
https://www.youtube.com/watch?v=8HYhSjc_q2o
Last edited:
