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[QUOTE]WI_guy_turnedMudDuck - 4/25/2012  11:34 AM

[QUOTE]reef hawg unhitched - 4/25/2012  8:22 AM

Question for the guys still running the (older?) cool hubs(2001).  I have changed the rear seals a couple of times, but my oil still gets fairly milky not long after changing.  Could the front seals be the issue, and are they replaceable?  Also, I have been told to fill them about 80% full, for expansion purposes.  True?[/QUOTE]

Here is an email I got from Ranger on the subject back in 2009.  I have a 2000 trailer with the cool hubs.

The oil can change color with as little as three drops of water. The milky oil will not
hurt anything. The hubs are to be serviced once per year or every 20,000 miles. There are
no issues with the hubs. Normal maintenance and they will last another 9 years.
Here' some additional information about COOL Hubs:
COOL HUBS
Contained Oil Orbital Lubrication (COOL) Hubs feature:
* ADDING LUBRICANT - Lubricant is added through threaded port on nose of hub. This allows
for easy access and maximum filling of hub cavity with oil.
* LUBRICANT - Uses standard 50 weight motor oil.
* PRESSURE CONTROL-THERMAL EXPANSION - Hub cavity is completely filled with oil. There is
no void which could allow water entry during submersion of trailer in water and cooling of
oil.
* SEALING - FRONT - Stainless steel barrel is press fit into hub. A seal is used between
hub bore and barrel. Double quad-rings on piston riding on a stainless steel surface to
help prevent any leakage.
* SEALING - REAR - A factory installed stainless steel collar is press fitted and sealed
onto spindle. A coated double lip inner hub seal riding on the stainless steel collar
keeps pressurized oil in and water out of hub.
If your trailer is equipped with COOL Hubs, the system should be serviced once a year or
every 20,000 miles whichever comes first. To do so, simply remove the plug located in the
hub nose, rotate the hole to the bottom position to drain the oil, refill the hub
completely with approximately 5 oz. of 50 wt, standard (non-synthetic) motor oil and
reinstall plug.
Hope this helps. Thanks again and let us know if we can be of further assistance.
[/QUOTE]

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You are replying to:

WI_guy_turnedMudDuck

Posted 4/25/2012 11:34 AM (#555678 - in reply to #555618)
Subject: RE: Ranger COOL Hubs to grease....?

Posts: 227

Location: Maple Grove

reef hawg unhitched - 4/25/2012 8:22 AM

Question for the guys still running the (older?) cool hubs(2001). I have changed the rear seals a couple of times, but my oil still gets fairly milky not long after changing. Could the front seals be the issue, and are they replaceable? Also, I have been told to fill them about 80% full, for expansion purposes. True?

Here is an email I got from Ranger on the subject back in 2009. I have a 2000 trailer with the cool hubs.

The oil can change color with as little as three drops of water. The milky oil will not
hurt anything. The hubs are to be serviced once per year or every 20,000 miles. There are
no issues with the hubs. Normal maintenance and they will last another 9 years.
Here' some additional information about COOL Hubs:
COOL HUBS
Contained Oil Orbital Lubrication (COOL) Hubs feature:
* ADDING LUBRICANT - Lubricant is added through threaded port on nose of hub. This allows
for easy access and maximum filling of hub cavity with oil.
* LUBRICANT - Uses standard 50 weight motor oil.
* PRESSURE CONTROL-THERMAL EXPANSION - Hub cavity is completely filled with oil. There is
no void which could allow water entry during submersion of trailer in water and cooling of
oil.
* SEALING - FRONT - Stainless steel barrel is press fit into hub. A seal is used between
hub bore and barrel. Double quad-rings on piston riding on a stainless steel surface to
help prevent any leakage.
* SEALING - REAR - A factory installed stainless steel collar is press fitted and sealed
onto spindle. A coated double lip inner hub seal riding on the stainless steel collar
keeps pressurized oil in and water out of hub.
If your trailer is equipped with COOL Hubs, the system should be serviced once a year or
every 20,000 miles whichever comes first. To do so, simply remove the plug located in the
hub nose, rotate the hole to the bottom position to drain the oil, refill the hub
completely with approximately 5 oz. of 50 wt, standard (non-synthetic) motor oil and
reinstall plug.
Hope this helps. Thanks again and let us know if we can be of further assistance.