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wolfe10 · 02-12-2015, 01:58 PM

Coach: 2003 Alpine 38FD. HWH 610 series jacks and hydraulic slides (2)

Sticker on Reservoir says: "Chevron Rykon Premium Oil MV"

It appears there are two different Rykon oils:
1. Chevron Rykon Premium Oils, ISO 15, 22, 32, 46, 68, 100.
2. Chevron Rykon Oils AW, ISO 32, 46, 68.

So, which one is it? I asked HWH, but they were not familiar with Rykon??

Thanks,

Brett

Dave Fernandez · 02-12-2015, 04:32 PM

Hello Brett, the HWH reservoir, solenoids and pump are located on the passenger side in a small compartment to the rear of the right front tire. The HWH system uses a Dexron hydraulic fluid, the same thing that is used in automatic transmissions, except without the red die.

The Rykon oil is used in the large reservoir located in the engine compartment on the passenger side. The large reservoir is for the Hydraulic Cooling Fan, Power Steering and Power Brakes and they are separate systems.

I would use the Chevron Rykon Premium Oil..

I hope this answers some of your questions.

wolfe10 · 02-12-2015, 04:35 PM

Dave,

Thanks for the reply, but on the 2003, the hydraulic fluid for the PS, fan and brake boost is Dexron. In fact, just changed the three filters and fluid this week.

The HWH (located where you said behind front right wheel) is the one with the label:

"Chevron Rykon Premium Oil MV"

Dave Fernandez · 02-12-2015, 04:39 PM

The HWH system was probably labeled incorrectly since HWH only uses Dexron Hydraulic oil.

You might get a sample and look at it; it should be clear unless someone put Dexron ATF in than it will look red, and smell like trans fluid. The previous owner may have had it serviced and someone may have changed it to Rykon but I do not know why anyone would do that.

Janet and Todd · 02-12-2015, 05:08 PM

We have the same Chevron Rykon sticker on our HWH tank as well. I did some research and concluded that I could just put HWH fluid in there and not cause any trouble. Rykon only comes in 55 gallon drums anyhow.

DrDaveMA · 02-12-2015, 07:52 PM

If you still have concerns call HWH (www.hwhcorp.com) 800 321-3494, they are VERY helpful.

Sent from my iPad using iRV2 - RV Forum

wolfe10 · 02-12-2015, 08:19 PM

Dave,

I did contact HWH-- that was my first call.

The answer I got back is they were not familiar with that oil.

Old Scout · 02-12-2015, 08:43 PM

Someone may have a different recollection but as I recall it--the HWH system came with HWH brand fluid--clear/no dye. Could be urban legend but I understood it that HWH recommended ATF [ATF III], not ATF IV, nor ATF VI as a suitable replacement. Interesting that I have never seen any info on replacing the original fluid.
Conversation on Rykon46 began with the hydraulic reservoir [engine fan, steering, brakes] as a replacement for the Valoline 15w40 engine oil used by WRV for a few years--Rykon46 was suggested as a solution for the hard brake pedal issue that came with change over to adjustable brake pedals. I eventually determined that 46 vs 68 etc was the ISO viscosity rating for hydraulic fluids.
Bottom line: use ATF III, any ISO 46 Hydraulic, or HWH fluid will do. No schedule for renewing/replacing the original HWH fluid.....

wolfe10 · 02-12-2015, 09:02 PM

Thanks everyone. Suspect it is a mis-placed/mis-directed label.

Will pull a sample when we get home and verify, but suspect it is either HWH fluid or Dexron.

I do know that the engine-driven hydraulic system in our 2003 is Dexron from both owners manual and from inspection of the fluid that I drained-- just changed the three filters and the 3.25 gallons in the reservoir.

Arch Hoagland · 02-12-2015, 10:37 PM

Isn't there another wolfe10 from Texas who does RV repair on here?

Or am I having a senior moment.

Gary Arnold · 02-13-2015, 08:03 AM

I concur with Janet and Todd Legg.

Our coach came with the same label and It looks professionally installed (Chevron Rykon sticker) The oil is red and I have been toping off with HWH clear oil.

Our coach serial number is close to Todd’s.

wolfe10 · 02-13-2015, 08:06 AM

Quote:

Originally Posted by Arch Hoagland

Isn't there another wolfe10 from Texas who does RV repair on here?

Or am I having a senior moment.

That is me-- perhaps that is why I am reluctant to use the incorrect fluid! We bought this coach is October last year and I am finishing up on the Preventive Maintenance items.

Brett Wolfe
Chairman FMCA Technical Advisory Committee
Moderator FMCA Forum
Moderator Diesel RV Club Technical Website
Wolfe10 on RV.net

Arch Hoagland · 02-13-2015, 11:28 AM

OK, got it!!

tjshively · 02-23-2015, 03:47 PM

Quote:

Originally Posted by Old Scout

Someone may have a different recollection but as I recall it--the HWH system came with HWH brand fluid--clear/no dye. Could be urban legend but I understood it that HWH recommended ATF [ATF III], not ATF IV, nor ATF VI as a suitable replacement. Interesting that I have never seen any info on replacing the original fluid.
Conversation on Rykon46 began with the hydraulic reservoir [engine fan, steering, brakes] as a replacement for the Valoline 15w40 engine oil used by WRV for a few years--Rykon46 was suggested as a solution for the hard brake pedal issue that came with change over to adjustable brake pedals. I eventually determined that 46 vs 68 etc was the ISO viscosity rating for hydraulic fluids.
Bottom line: use ATF III, any ISO 46 Hydraulic, or HWH fluid will do. No schedule for renewing/replacing the original HWH fluid.....

My 2005 Alpine Coach has always had 15w40 oil in the reservoir for engine fan, steering, brakes. If I change to one the your recommended ones how do I flush the system? I am supposing it must be flushed.