Re: 94 u280 Hydraulic Fan Motor Reply #25 – October 04, 2019, 11:02:13 pm Quote from: Twig – October 04, 2019, 06:22:10 pmWhen I was having a heating problem I called Foretravel help desk and was told that I have a solenoid that runs the fans on high. It is temp controlled and opens up to let the oil flow faster which in turn makes the fans go faster. Take the top off and the fans run on high full time. That's all I know. But the fact that the guy at Foretravel told me where it was and what it was, I assumed they were all the same. How do your fans run on high speed?TwigWhat engine is in your coach. I have Cummings c8.3 many that is the difference. All I can say is my hydraulic lines connect only to pump motors and reservoir. Thanks Gary Quote Selected
Re: 94 u280 Hydraulic Fan Motor Reply #26 – October 05, 2019, 12:12:10 am Quote from: Gary and Kathy – October 04, 2019, 01:57:25 pmI didn't notice excessive heat at reservoir, but may not have noticed. Will watch for that in future. If it was excessively hot you would have noticed. I am far from an expert on hydraulic gear pumps and motors but I've only seen 3 lines out of a motor. Input, output and drain. Input and output are usually 5/8" lines. Drain lines are usually 1/4" to 3/8" lines. If I can find the time in the morning I'll pull out my old motor and pull it apart and take some pics for you. They are incredibly simple devices.see yaken Quote Selected
Re: 94 u280 Hydraulic Fan Motor Reply #27 – October 05, 2019, 07:36:49 am Quote from: Gary and Kathy – October 04, 2019, 11:02:13 pmTwigWhat engine is in your coach. I have Cummings c8.3 many that is the difference. All I can say is my hydraulic lines connect only to pump motors and reservoir. Thanks Gary Our 95 280 has the same setup as Twig, Valve energized is low speed and defaults to high if valve fails.Yes it is temp controlled and matches the hydraulic schematic. Quote Selected
Re: 94 u280 Hydraulic Fan Motor Reply #28 – October 05, 2019, 11:23:40 am KenNo need to go to that trouble took pump to shop yesterday and they verified what you said. Small line is for case drain to protect seals. Thanks Gary Quote Selected 1 Likes
Re: 94 u280 Hydraulic Fan Motor Reply #29 – October 07, 2019, 11:38:01 am Well I read your "no need" message after I had taken pics so here they are.As I said they are very simple devices. The engineering to figure out the right size, flow, & pressure is the complicated part. I'm not sure why they are so expensive. It's just a hunk of aluminum with a couple of gears. IIRC this one was over $600 might have been $800. It's been 5 or 6 years ago that I dealt with it. If the motor is engineered with a drain it must be clear and connected otherwise under high pressure it will put a LOT of stress on the shaft seal. Most likely resulting in a blow out. This motor is probably not the one in your coach or a replacement for yours. And I mean anyone reading this. see yaken Quote Selected 8 Likes
Re: 94 u280 Hydraulic Fan Motor Reply #30 – October 07, 2019, 01:45:56 pm Good picture show. Good info I found it interesting and informative. I think others will alsoThanks Gary Quote Selected 1 Likes
Re: 94 u280 Hydraulic Fan Motor Reply #31 – October 07, 2019, 08:29:53 pm Great photos and annotations! This should be in the media section. It makes understanding how the pump works simple.Pierce Quote Selected
Re: 94 u280 Hydraulic Fan Motor Reply #32 – October 12, 2019, 10:39:21 am I have not abandoned this post, I am waiting for motor to be repaired. The repair shop revived seal kit yesterday and it was WRONG! Waiting for another to be shipped. Gary Quote Selected
Re: 94 u280 Hydraulic Fan Motor Reply #33 – October 19, 2019, 05:35:35 pm Well I picked up my fan motor this morning, and installed this afternoon. No leaks. The next 1000 MI. I will be very apprehensive.Cross your fingers for me. If I don't have any further problems this will end this post. Thanks for all the helpGary Quote Selected 7 Likes
Re: 94 u280 Hydraulic Fan Motor Reply #34 – January 21, 2020, 01:55:40 pm 1500 MI and doing good Quote Selected 5 Likes
Topic: 94 u280 Hydraulic Fan Motor