Hydraulic fluid change interval?

[Jeff753]

Originally Posted by wamcneil

My manual says Dexron III ("The hydraulic fluid used is an
automatic transmission fluid (Dexron III) which..."). Some folks are apparently reporting that Monaco used different fluids in the same systems, so apparently the specific oil type isn't critical.
But whatever the case, my system was filled with red atf, and I replaced it with red ATF (Dex III).
I have an external spin-on filter, and the manual lists the filter as: Parker IN HC 5720. This is apparently a misprint, and the actual part number is "HC 5720". I'm not sure if Parker makes that P/N anymore, but it cross references to Fleetguard HF6167, Napa 1759).
Fleetguard Hydraulic Filter Hf6725 - Cummins Replacement Part
Application: AG CHEM EQUIPMENT 609431; AG CHEM EQUIPMENT AG609431; INGERSOLL-RAND 59873539; SWIFT FILTERS; INC. SF7500-4-25UM; WESTERN STAR E0211B1R20; MP PRODUCTS CSG-100-A25A; STUDEBAKER 525M; VICKERS V0211B1R20Cross Reference: BALDWIN BT8309-MPG; DONALDSON P165877; FRAM P7253; NAPA 1759; WIX 51759
Height (inch): 6.71O.D.1 (inch): 5.08Thread: 1 1/2-16 UN-2B

The manual goes on to talk about some models having a Nelson reservoir with internal filters. If you've got the Nelson reservoir, apparently it'll use Nelson 84101B filters, but these are internal cartridge filters, and are not the same as the Parker spin-on filters for the tank/external filter.

I sure don't see the external filter. I do have the canister and am getting some Dex and some Nelson filters. Where is your spin on? Next to the can?


Jeff
2001 Dynasty Regent tag axle
Cummins 350 8.3 ISC
2012 Jeep Grand Cherokee Overland
FMCA ENERGIZED Task Force Chairman

[barmcd]

Originally Posted by Jeff753

I sure don't see the external filter. I do have the canister and am getting some Dex and some Nelson filters. Where is your spin on? Next to the can?


Jeff
2001 Dynasty Regent tag axle
Cummins 350 8.3 ISC
2012 Jeep Grand Cherokee Overland
FMCA ENERGIZED Task Force Chairman

If you have a round reservoir, you won't have an external filter, just the three internal filters. The big o-ring seal was pretty hard on mine so I ordered a new one and replaced it.

[96 Wideglide]

I have a round reservoir and the large spin on filter.

[kketterling]

Same here as Ben's. In addition there is a gauge which indicates status of external filter.

[barmcd]

Originally Posted by kketterling

Same here as Ben's. In addition there is a gauge which indicates status of external filter.

A filter gauge on the hydraulic reservoir? I've never seen that--do you have a picture?

[96 Wideglide]

Gauge is a part of the filter head on the spin-on filter.

[barmcd]

Its definitely hard to figure out which coaches have which features. I would have thought all the round reservoirs would be the same, but that's obviously not the case.

[96 Wideglide]

Ah, Yeah !

Oddly enough, my owners manual shows the remote spin-on filter as 'optional on coaches with Caterpillar engines'. I have a Cummins engine!
Guess they had an extra one kicking around, so they threw it on !

[MTK46]

As far a time interval to change hyd. fluid the Kubota tractors we sell have 600 hour intervals on oil & 300 hours on filters. That fluid is operating the transmission clutch packs, steering, PTO, 3-point lift & remotes. Our MH hyd. oil doesn't have nearly as hard a job.
So at 90k + miles mine shows just over 1900 hours. It's 15 years old so that's a average of 126 hours per year. That would be filter changes every 2 1/2 years & oil change every 5 years.

[Jeff753]

Originally Posted by barmcd

If you have a round reservoir, you won't have an external filter, just the three internal filters. The big o-ring seal was pretty hard on mine so I ordered a new one and replaced it.

Round gasket under the large lid? Do you happen to have a part number or source for that? I have ordered the filters, Dex 3 (chevron) and drill pump. Didn't think about the gasket.


Jeff
2001 Dynasty Regent tag axle
Cummins 350 8.3 ISC
2012 Jeep Grand Cherokee Overland
FMCA ENERGIZED Task Force Chairman

[wamcneil]

Originally Posted by Jeff753

I sure don't see the external filter. I do have the canister and am getting some Dex and some Nelson filters. Where is your spin on? Next to the can?
Jeff
2001 Dynasty Regent tag axle
Cummins 350 8.3 ISC
2012 Jeep Grand Cherokee Overland
FMCA ENERGIZED Task Force Chairman

My spin-on is low on the driver's side, inside the 'box' formed by the hitch mounting frame, opposite the secondary fuel filer. (the manual says it has an integral flow meter, but mine has none)
I have a big aluminum box reservoir on the passenger side rear of the engine compartment, and no canister/filter.

[barmcd]

Originally Posted by Jeff753

Round gasket under the large lid? Do you happen to have a part number or source for that? I have ordered the filters, Dex 3 (chevron) and drill pump. Didn't think about the gasket.


Jeff
2001 Dynasty Regent tag axle
Cummins 350 8.3 ISC
2012 Jeep Grand Cherokee Overland
FMCA ENERGIZED Task Force Chairman

That's the one. I got it at Ryder fleet products.

https://www.ryderfleetproducts.com/f...t-p-v52-99955a

[96 Wideglide]

Originally Posted by wamcneil

My spin-on is low on the driver's side, inside the 'box' formed by the hitch mounting frame, opposite the secondary fuel filer. (the manual says it has an integral flow meter, but mine has none)
I have a big aluminum box reservoir on the passenger side rear of the engine compartment, and no canister/filter.

wamcneil, what engine do you have?

[wamcneil]

Originally Posted by 96 Wideglide

wamcneil, what engine do you have?

2003 Dynasty with ISL 400