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Old 09-30-2020, 07:19 PM   #1
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Cummins 8.3ISC PTO/Power Steering Hose

2004 Country Coach Inspire


I finally got the DP on her winter hibernation pad, which gave me good access under the engine bay to find the source of a leak.

The large hose connecting the bottom of the power steering fluid reservoir (large canister, has 3 filters, filled with Dex II) and what I assume is the PTO on the passenger side of the engine.
Hose has outer casing peeling away in places, and a slight leak in the middle (lowest point of hose).
I don't see anything like this listed on the Cummins site. Does anyone have a possible part number, or know a good source for a replacement?


Thanks!!
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Old 09-30-2020, 08:57 PM   #2
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On my 2008 and 2013 Buses with ISL's that hose goes to the hydraulic pump on the passenger side of the engine. I had a leak at the lower end where the hose connected to the pump that I could not fix with new and tighter clamps, so I replaced the hose. I got my replacement hose at a local hydraulic shop, and new, high end clamps at a local diesel shop. No special part number, just xx feet of hose and trimmed as needed. Since I had to drain the reservoir anyway, I replaced the Dextron fluid with Transynd. Since Dextron is no longer required to meet ANY testing/composition specifications, I thought it was a good idea, and after checking with Tom Johnson, the man who designed Transynd for Allison, (https://www.irv2.com/forums/f125/for...eer-89293.html) I switched. Of course I also switched to clean filters. 20,000 miles so far and no problems.
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Old 10-02-2020, 08:04 PM   #3
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Thanks for the info! Got a hose and heavy duty clamps today, 3 gallons of Dex III, and 3 filters. Will need more fluid, but want to drive it to get the fluid to operating temp to get proper fill level.
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Old 10-03-2020, 10:52 AM   #4
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Quote:
Originally Posted by 429CV23 View Post
Thanks for the info! Got a hose and heavy duty clamps today, 3 gallons of Dex III, and 3 filters. Will need more fluid, but want to drive it to get the fluid to operating temp to get proper fill level.
Cool, good luck with it.
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Old 10-03-2020, 04:27 PM   #5
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Very easy job. Was lucky to find the filters locally; might as well replace them along with the fluid.

Had a small oil leak/drip from the Fumoto Valve too, just needed a 1/4 turn to tighten it up. Seems to have fixed that as well.
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