Re: Hydraulic Fan Motor Upgrade/Replace Reply #50 – December 24, 2014, 09:05:38 pm The pump on my U280 was leaking and I took the unit to a local SunSource hydraulic shop. They were unable to get any information on the pump but they did order the seals with the part number I gave them. They cleaned the unit and installed all of the seals in the kit. Now I carry an extra seal kit in the coach. Haldex W9A2 seal kit 5000101. Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #51 – December 25, 2014, 08:23:54 am Quote from: Caflashbob – December 22, 2014, 04:23:37 pmCountry coach called it "a piloted wax capsule" Basically a wax motor thermostat using the wax motor to open and close a flow control valve.Basic principal shown below Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #52 – December 25, 2014, 08:27:22 am Quote from: Tom & Lynda – December 24, 2014, 09:05:38 pmThe pump on my U280 was leaking and I took the unit to a local SunSource hydraulic shop. They were unable to get any information on the pump but they did order the seals with the part number I gave them. They cleaned the unit and installed all of the seals in the kit. Now I carry an extra seal kit in the coach. Haldex W9A2 seal kit 5000101.Looks like the W92A series pump may have been a commonly used pump. Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #53 – December 25, 2014, 10:21:29 am I have one of five 1993, U300's that have a variable speed fan controller according to the FOT shop. They were used as a test. The fan speed is correlated to the engine rpm. It was a great concept but in City Traffic it doesn't get any Ram Air effect and the low rpm's make it heat up in hot weather. As I recall the fan speed is 800 rpm on engine and 800 rpm on fans and 2100 rpm on engine 1800 on the fan. I was told the only used the this particular variable speed controller on five coaches. They went back to the two speed fan controller because it worked better overall.My current coach has a water sprayer for the radiator called an Ultra Desert Cooler (Now out of business) so I have no need for a front Ram Air radiator on my U300, but the front radiator I installed on my U225 worked great with no fans. It was an all aluminum 24" x 24" two row radiator with 3/4" openings. Its loop was T's in to the 3/4" return hose after going through the heater core. The radiator hose front to back on the U225 was all 3/4". It provided plenty of flow for additional cooling. I installed the aux radiator behind the A/C unit with no fan on the aux radiator. It dropped the coolant temps 10 degrees on average. I set mine up with a shutoff ball valve to the aux radiator loop so I could take it out of the coolant system in the winter. I don't think the U225 had the Auxiliary Coolant Pump like the one on my U300 so it might have worked even better with a pump. Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #54 – December 26, 2014, 08:01:50 pm The info off my valve is "Sunstand Thermostatic valve Date 97 f11, PN 553/1/09856/190I found a good thread discussing the valve and the hydraulic system. Also, said Sunstand on it, I didn't look hard for a PN, but it [EDIT: My PUMP is weeping, not the thermostatic valve] is weeping a little around the shaft...grrrr. Anyway, it appears Monaco and others used this same hydraulic setup---so I doubt it is special to FT.Thermostatic Valve - iRV2 ForumsAlso, I'd say the valve control is probably variable.More useful good info, go to page 7: http://www.bibus.hu/fileadmin/editors/countries/bihun/product_data/sauer-danfoss/documents/sauerdanfoss_group_2_gear_pumps_catalogue_en.pdfAlso, part number break down. I haven't looked closely at my motors yet to see if I can find PN info. Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #55 – December 26, 2014, 08:28:12 pm This is probably the best thread and system description: Side Radiator wax valve replacement - iRV2 ForumsI was going to do this test or Barry was, but this guy already seems to have done it."The little red valve on the test gage is very sensitive because the flow to the control circuit is very small, just a slight movement and you get a big fan speed change.Basically just moving the valve from open to closed causes the fans to run very slow (open) to very fast (closed) with a linier operations between open and closed. The fans work great." Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #56 – December 26, 2014, 08:34:22 pm And here's something interesting...these guys are selling the wax valve to replace the electronic control valve:Source Engineering Inc | Custom RV Chassis | Eugene, OR"All Monaco, Western RV, Bluebird,Foretravel, Country Coach and othersIf you have a coach with the Saurer-Danfosshydraulic fan drive and have experienced failuresrelated to the electronic control unit known as the"FDCA" we have a economical answer to the problem.When these controllers fail the fan typically willgo to full speed and will not modulate this will createseveral undesirable effects."I don't think FT engineered this system in house....just like many components on our coaches, they bought them from another company that figured it out. Like, the doors, the leveling system, the toilet, the tanks, etc etc.I reading somewhere that the Italian motor maker is Casappa Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #57 – December 26, 2014, 08:45:25 pm What years have what system? Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #58 – December 26, 2014, 09:05:14 pm Krush ---- I'm guessing that your hydraulic fluid is 15w40 based on earlier info on the forum. If not and your fan hydraulics are part of the steering system which uses power steering fluid, You may want to try using a power steering stop leak to condition that shaft seal. I was having some leakage (a half dozen drops a day) so I used two small bottles of LUCUS power steering stop leak and now after several thousand miles of running, It has stopped leaking. Have a great day ---- Fritz Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #59 – December 26, 2014, 09:27:15 pm Fritz, on my coach the fan and powersteering share the same pump/fluid. Instructions say 15w40 motor oil. But I'm thinking about switching to hydrualic fluid.Last bit of information from another forum: "It [hydraulic fan motor] has the Sauer danfoss part no. on it but is now made by Dynamatic"This or Casappa is the motor?!!? I guess lol.....EDIT: OK, here is the mother of all hydraulic fan/pump/system information. I didn't dig through it all, but it has specs for most of the pumps, valves and motors. http://www.mbh.com.br/pdf/Lit/520L0824_Fan%20Drive%20Control%20ME_TI_Nov-2005_Rev%201.pdfIt appears the system is the same, it's just that company names have changed over the years due to buying/selling. Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #60 – December 26, 2014, 10:09:08 pm According to this PDF from Sheppard, it is ok to use Exxon and Valvoline AW 32 hydraulic oil.....realistically, any AW 32 hydraulic oil. I think using hydraulic oil in the system may give better life to the pump and motors.http://www.rhsheppard.com/service/Approved_Fluid_List.pdf Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #61 – December 28, 2014, 10:38:10 am @krush Thanks for the Sauer Danfoss document. There is a lot of good info in there. It's given me some ideas!see yaken Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #62 – December 29, 2014, 01:35:50 am I had been looking for a document for the sauer danfoss manual last week, but didn't find one so I took every thing apart to find out how it works so I could trouble shoot it. I will keep the document. Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #63 – December 29, 2014, 08:07:25 pm Remember, it's flow, not pressure! Quote Selected
Re: Hydraulic Fan Motor Upgrade/Replace Reply #64 – December 29, 2014, 08:39:54 pm Quote from: krush – December 29, 2014, 08:07:25 pmRemember, it's flow, not pressure!Actually, it is BOTH. Quote Selected
Topic: Hydraulic Fan Motor Upgrade/Replace