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Old 11-29-2020, 09:26 PM   #1
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Hydraulic fan return hose

Anyone replace theirs? While doing my maintenance work on the engine, I noticed some leakage from where the hose goes into the hydraulic fan. This is the hose that goes from the fan motor to the cooler. Is there an O-ring in there? Hose looks tight.
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Old 11-29-2020, 09:41 PM   #2
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Old 11-29-2020, 10:09 PM   #3
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I think the fittings for my fan are JIC. If it looks like it is leaking from the fitting but it is tight check the crimp. Hoses will often leak there.

Ted
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Old 11-29-2020, 11:03 PM   #4
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Its leaking or at least I see some wetness in this area. I haven't run the engine in a month or so. I figured the leak started after I messed with moving the fan cage around to replace the fan blade. There is a decent size wet spot where it is circled after about a week. Again, engine hasn't been started yet. Do I just order a new hose?
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Old 11-29-2020, 11:41 PM   #5
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Quote:
Originally Posted by Bus'n it View Post
Its leaking or at least I see some wetness in this area. I haven't run the engine in a month or so. I figured the leak started after I messed with moving the fan cage around to replace the fan blade. There is a decent size wet spot where it is circled after about a week. Again, engine hasn't been started yet. Do I just order a new hose?
When looking for leaks in hydraulic hoses I clean them up with non chlorinated brake clean and then put pressure to the hose and look for the leak.

If it is leaking out the threads or the swivel of the fitting and it is JIC it may just need to be tightened a little being carefull not to over tighten. If it still leaks take the fitting apart and check for corrosion, dirt or cracking in the sealing area. JIC fitting are metal to metal so any rust or dirt could causes a leak. If damaged it could be either the hose side or the hydraulic motor side fitting.

If it turns out to be the hose side that is damaged you can take the hose to a industrial / hydraulic supply shop and have a new hose made.

If it's an o ring fitting it should be an easy fix.

Ted

PS

Your fan looks clean enough to eat off of.
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Old 11-30-2020, 01:27 AM   #6
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Thanks Ted. I replaced the fan since the original one had missing bits on the ends. I didn't want to worry about it grenading itself at an inopportune time.
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