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07-11-2020, 05:47 PM
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#1
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Guru
City: Savannah, Ga.
Vessel Name: Indigo Star
Vessel Model: 2006 Mainship 400
Join Date: Jun 2018
Posts: 596
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ZF Hurth Transmission Oil Drain port-
Hello,
The PO of our 2006 Mainship 400 plumbed one of the X-Change-R Oil System ports to the Hurth Transmission. He added an in-line shut-Off valve and what looks like a pipe extension at the trans mission oil drain cap.
Draining the oil from this gearbox looks to be super easy and the in-line shut off valve (from the gearbox to the Xchanger) fittings leak a little oil into the bilge so I was thinking of just removing this pipe thing on the upcoming fluid change....
Anybody have a source of where the drain plug can be ordered.?
Thanks in advance for comments..
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07-13-2020, 07:14 AM
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#2
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Guru
City: Edgewater, MD
Vessel Name: Catalina Jack
Vessel Model: Defever 44
Join Date: Nov 2011
Posts: 3,585
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So, it seems you have the easiest oil change solution already in place yet you want to remove it and go to draining the transmission oil into some sort of catch pan and then messily (potentially) transferring it to a disposal can of some sort. Kinda defeats the purpose of the oil exchanger system. If it were I, I would simply replace the leaking valve.
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07-13-2020, 09:39 AM
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#3
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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I agree why not fix the leak. A pipe attached to a vibrating engine is not the best idea.
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07-13-2020, 09:46 AM
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#4
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Guru
City: Edgewater, MD
Vessel Name: Catalina Jack
Vessel Model: Defever 44
Join Date: Nov 2011
Posts: 3,585
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Bayview, I was going to make the same comment on the pipe. It needs to be there (apparently) in order to clear the shaft flange. But, it should be a steel pipe rather than copper. Copper, with vibration, can work harden, then crack. Not good. Steel, no problem. I know this from experience.
Quote:
Originally Posted by bayview
I agree why not fix the leak. A pipe attached to a vibrating engine is not the best idea.
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07-13-2020, 10:58 AM
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#5
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TF Site Team
City: Seneca Lake NY
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 7,826
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When I checked on my ZF 85A I was told the plug is 1/2" NPT thread.
Should be easy to find an valve / adapter that would fit
Fumoto has some new additions but pn quick look didn't see 1/2" NPT but did have 1/2"-20 UNF. They may have an adapter??
__________________
Don
2008 MS 34 HT Trawler
"Bacchus"
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07-13-2020, 10:58 AM
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#6
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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Cant tell if there is room to install an L pointing down.
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07-13-2020, 11:17 AM
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#7
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Guru
City: Savannah, Ga.
Vessel Name: Indigo Star
Vessel Model: 2006 Mainship 400
Join Date: Jun 2018
Posts: 596
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My mistake, I meant to say the oil isnt leaking from the pipe extension, its leaking from the On/Off Valve fittings.....see the red tee valve in the pic....I think he had it installed in order to incorporate this gearbox into the X-Changer....
if you guys think its a good idea then maybe when I change the fluid next time, fix the leak in the valve fittings as well and leave it as is..
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07-13-2020, 11:22 AM
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#8
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Technical Guru
City: Wilmington, NC
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 6,194
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Yep, that copper tube cantilevered out is a bad fatigue situation. Get rid of it and order a drain plug from ZF. Or if the plug is tapped for NPT, just put a pipe plug in the NPT hole.
I think that gear is easy to drain by a sucker lance down the dipstick hole. Been a while since I did one of those.
I seriously doubt that drain hole in the case is NPT.
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