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11-15-2020, 08:04 AM
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#1
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Member
Join Date: May 2017
Posts: 63
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Freightliner Sauer Danfoss hydraulic fan leaking
Recently on my trip home from Ft Myers, I noticed a couple of drops of oil under the side radiator on my 04 DSDP on a Freightliner XC chassis. I spent a lot of time researching and trying to find a seal kit for it. No luck, the motor is obsolete, kits are obsolete and your only choice is to buy a new one. At this point there’s no harm in pulling the seal out and try to find a replacement. I was pleasantly surprised when I found that this seal is a 25X42X7mm seal. Very common. Posting this so anyone else in this situation can pre order the seal before taking the motor out. One person can probably get it out but it’s a 2 man job putting it back in.  My motor number is TAM22-90/26.5 CO07 MBX 5
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2016 NEWMAR Ventana 4369
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11-15-2020, 07:12 PM
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#2
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Junior Member
Fleetwood Owners Club Freightliner Owners Club
Join Date: Aug 2015
Posts: 16
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Leaking Hydraulic Fan Motor
To AdamZ
I am excited to see your post today. I have a Freightliner chassis that was built in May of 2006. The body is a Tiffin bus 40 QDP. The engine is 8.9 Cummins.
The side radiator hydraulic fan motor seal is leaking The factory parts department told me the motor is obsolete and no longer available. At this time I do not have a solution.
I attempted to remove the motor and quit when I found I cannot reach the top hose fitting laying under the coach.
Hopefully, you can answer these questions.
Did your Sauer Danfoss motor have a hose fitting on top that goes to the side radiator, a fitting on the bottom that I think is the oil from the pump, and a small line on the back that connects to the bottom of the oil reservoir? Are the fittings threaded where they attach to the motor or flanged with "O"-rings. Mine is threaded fittings.
From: Fleet 05
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11-16-2020, 05:31 AM
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#3
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Member
Join Date: May 2017
Posts: 63
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Sounds exactly like mine. I removed the large bottom hose that goes toward the radiator and then removed the hose that goes to the pump and the small one that goes to the bottom of the hydraulic reservoir. I pulled the motor out with all of the hoses attached. It would be a good time to change the fluid and filter. The filter is inside the reservoir. Mine had a Fram C1720 filter. 3 gallons of Dexron lll to refill. 
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2016 NEWMAR Ventana 4369
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11-16-2020, 02:14 PM
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#4
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Senior Member
Join Date: Feb 2020
Location: NY State
Posts: 3,089
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Is that the shaft seal you're talking about? And, what manufacturer and part number did you go with?
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John
1976 Southwind 28', '96 Winnie 34WK,
2006 Tiffin Allegro Bus 40QDP
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11-17-2020, 09:20 AM
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#5
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Member
Join Date: May 2017
Posts: 63
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This is what I used, nitrile seal. $2.52 
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2016 NEWMAR Ventana 4369
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11-17-2020, 03:48 PM
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#6
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Senior Member
Join Date: Feb 2020
Location: NY State
Posts: 3,089
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Thanks!
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John
1976 Southwind 28', '96 Winnie 34WK,
2006 Tiffin Allegro Bus 40QDP
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11-17-2020, 07:36 PM
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#7
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Senior Member
Winnebago Owners Club Freightliner Owners Club
Join Date: Jul 2012
Location: Indianapolis, IN
Posts: 274
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Quote:
Originally Posted by AdamsZ
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how hard was it to replace seal?
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2004 Itasca Horizon 40AD caterpillar C7 engine 350 HP with 2016 Smart car toad
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11-17-2020, 09:12 PM
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#8
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Senior Member
Join Date: Mar 2014
Location: Campbellsville Ky
Posts: 510
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Where did you buy the seal ?
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2008 American Tradition 42C 2018 JUL Jeep Wrangler
2004 Newmar Dutch Star 4010 Spartan (Sold)
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11-17-2020, 09:18 PM
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#9
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Member
Join Date: May 2017
Posts: 63
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The seal replacement itself is easy. Drill 2 1/8” holes in the seal, screw in a couple of sheet metal screws and pull it out. Tap the new one in with a socket.
I bought the seals at Applied Technologies in Jackson,MI. They are available online, type in 25X42X7mm oil seal. Amazon, eBay etc...
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2016 NEWMAR Ventana 4369
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11-17-2020, 09:19 PM
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#10
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Senior Member
Join Date: Aug 2020
Location: Henderson, KY
Posts: 123
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Try a bearing store as they have seals for about everything.
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11-17-2020, 09:21 PM
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#11
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Member
Join Date: May 2017
Posts: 63
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I forgot to mention that there is a steel washer under the snap ring that has to come out to get to the seal. Mine was kind of rusty and stuck, it was harder to get out than the seal
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2016 NEWMAR Ventana 4369
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11-18-2020, 12:59 PM
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#12
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Senior Member
Join Date: Mar 2014
Location: Campbellsville Ky
Posts: 510
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Quote:
Originally Posted by AdamsZ
I forgot to mention that there is a steel washer under the snap ring that has to come out to get to the seal. Mine was kind of rusty and stuck, it was harder to get out than the seal
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2008 American Tradition 42C 2018 JUL Jeep Wrangler
2004 Newmar Dutch Star 4010 Spartan (Sold)
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01-08-2021, 08:19 AM
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#13
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Junior Member
Fleetwood Owners Club Freightliner Owners Club
Join Date: Aug 2015
Posts: 16
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To AdamZ
Thank you for the post on 11/15/20. Your post inspired me to replace the leaking seal on our Freightliner chassis with a Tiffin bus body.
I have tried to add more information about doing the work and not able to make the post. I think I get timed out.
Now the motor is not leaking and am trying to deal with the problem of replacing the failed Sauer Danfoss FDC (Fan Drive Control) module. I am very disappointed with Freightliner as they do not have replacement for these frequent failure parts.
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01-09-2021, 10:26 AM
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#14
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Member
Join Date: May 2017
Posts: 63
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Quote:
Originally Posted by Fleet05
To AdamZ
Thank you for the post on 11/15/20. Your post inspired me to replace the leaking seal on our Freightliner chassis with a Tiffin bus body.
I have tried to add more information about doing the work and not able to make the post. I think I get timed out.
Now the motor is not leaking and am trying to deal with the problem of replacing the failed Sauer Danfoss FDC (Fan Drive Control) module. I am very disappointed with Freightliner as they do not have replacement for these frequent failure parts.
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I saw this before, hope it helps
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2016 NEWMAR Ventana 4369
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