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09-22-2014, 11:53 AM
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#1
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Senior Member
Join Date: Jul 2013
Location: NH
Posts: 165
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Help identifying what part this is ?
This is on my 2000 Newmar Dutchstar DP. My AC compressor went and in the process of replacing it now. Got the new one all installed and lines hooked up, just need to get it recharged, put on a new belt and figure out what fluid I need to replace that drained off quite a bit when I disconnected the lines going to this piece here.
I had to disconnect one of the lines to tuck this "motor" out of the way to get room to get at my compressor. Not a hard job at all really..saved myself a 1000 bux in labor for sure. Part ran me $550 which isn't too bad, could have been worse.
Not sure what it is. Looks like hydraulic fluid that I drained...about 4 qts came out of it. What is this piece ?
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09-22-2014, 12:01 PM
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#2
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Senior Member
Join Date: Apr 2012
Location: Louisville, KY
Posts: 1,489
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A pic might help.
__________________
Mark Anderson - FMCA 351514 - NRVIA Certified Level 2 Inspector
Louisville, KY
2011 Tiffin Phaeton 40QTH
2006 Jeep Commander
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09-22-2014, 12:11 PM
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#3
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Senior Member
Join Date: Jul 2013
Location: NH
Posts: 165
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Sorry about that. It got removed because it was too large! 
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09-22-2014, 12:18 PM
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#4
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Registered User
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
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Looks like it could possibly be an "add-on" unit for an auxiliary toad braking system.
Just guessing.
Dr4Film ----- Richard
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09-22-2014, 01:08 PM
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#5
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Senior Member
Join Date: Apr 2012
Location: Louisville, KY
Posts: 1,489
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What does the writing on the side say? I can't make that out in the pic.
__________________
Mark Anderson - FMCA 351514 - NRVIA Certified Level 2 Inspector
Louisville, KY
2011 Tiffin Phaeton 40QTH
2006 Jeep Commander
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09-22-2014, 01:13 PM
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#6
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Senior Member
Join Date: Mar 2013
Location: Fort Worth TX
Posts: 845
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Maybe some kind of pressure regulator for the power steering system?
__________________
2005 Newmar Dutch Star 4024
Pulling my 2012 Malibu w/Blue OX & Patriot brake unit
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09-22-2014, 02:39 PM
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#7
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Senior Member
Join Date: Jul 2013
Location: NH
Posts: 165
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Mystery solved. I called Freightliner and gave them a description and part # fromit. It's a Vickers pump/selanoid it MCD-62-63. It operates both the radiator cooling fan and the power steering. Has a 12 qt capacity of Dextron III. Guess I'll drain out 8 more and finish with a fresh flush 
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09-22-2014, 05:58 PM
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#8
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Senior Member
Join Date: Apr 2012
Location: Louisville, KY
Posts: 1,489
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I got a wrinkle in my brain!
__________________
Mark Anderson - FMCA 351514 - NRVIA Certified Level 2 Inspector
Louisville, KY
2011 Tiffin Phaeton 40QTH
2006 Jeep Commander
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09-29-2014, 06:50 PM
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#9
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,449
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Quote:
Originally Posted by Turbo38sfi
Mystery solved. I called Freightliner and gave them a description and part # fromit. It's a Vickers pump/selanoid it MCD-62-63. It operates both the radiator cooling fan and the power steering. Has a 12 qt capacity of Dextron III. Guess I'll drain out 8 more and finish with a fresh flush |
Not 100 % correct , the solenoid , controls the two speeds of the hydraulic fan; by returning flow to the tank when not required. The default is high speed and if you disconnect the wiring when the motor is running, the fan goes to max. You'll need to know this if your fan speed control module fails , and you get an overheating condition.
Don't ask how I know this. 
Internal in the reservoir is a hydraulic filter, if your doing a drain might as well go the whole 9 yards.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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09-29-2014, 06:56 PM
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#10
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Quote:
Originally Posted by Skip426
Not 100 % correct , the solenoid , controls the two speeds of the hydraulic fan; by returning flow to the tank when not required. The default is high speed and if you disconnect the wiring when the motor is running, the fan goes to max. You'll need to know this if your fan speed control module fails , and you get an overheating condition.
Don't ask how I know this.
Internal in the reservoir is a hydraulic filter, if your doing a drain might as well go the whole 9 yards. |
Yep, had one fail on our 2000 DSDP w/FL chassis. Just disconnected the wires so the fan ran at full speed, then had it fixed later.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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