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dashwood
Joined: 24 Jan 2009
Posts: 73
Location: sw ontario canada
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 Posted: Mon Jun 04, 2012 6:14 am Post subject: 912 and 701 oil pump connections |
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i am having a problem plumbing the oil cooler outlet to the inlet to the pump.. a 912 in a 701. it is a suction line. and the pipe and fittings are not working. plane has been flying for 11 years and 500hrs.. i have replaced this hose several times.. the fitting into the pump is a hose barb with what appears to be a 12mm 16 tpi fitting.. from there the shortest amount of hardware takes me 2" past the outlet of oil cooler.. the hoses have to return 2" and down 4" to get back to oil cooler. this line is under stress and wants to kink off oil flow.. i was just wondering what others are doing at this point. i think instead of 2 hose barbs back to back into an up size adapter into 1/2 x 90deg elbow down into 1/2hose barb, short hose to inlet barb on cooler... does not fit well and is a lot parts to get a short distance.. if i could find a fitting to go into pump that could in shorter space be adapted into standard pipe fitting would be better.. pictures would be appreciated.
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Ross Alexander: CH701 driver 912ul 788tt
It only takes two things to fly, airspeed and money |
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dashwood
Joined: 24 Jan 2009
Posts: 73
Location: sw ontario canada
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| Posted: Mon Jun 04, 2012 5:20 pm Post subject: Re: 912 and 701 oil pump connections |
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example of poor drawing
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| Description: |
| elbow back to pump 2 of 3 clamps |
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| Filesize: |
245.25 KB |
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5639 Time(s) |
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| Description: |
| down from elbow to top of oil cooler |
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| Filesize: |
217.18 KB |
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5639 Time(s) |
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| Description: |
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Download |
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pipedrawing.pdf |
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29.15 KB |
| Downloaded: |
505 Time(s) |
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Ross Alexander: CH701 driver 912ul 788tt
It only takes two things to fly, airspeed and money |
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dougsnash
Joined: 14 Apr 2008
Posts: 281
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| Posted: Mon Jun 04, 2012 6:30 pm Post subject: 912 and 701 oil pump connections |
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Ross, I think I understand what you are looking for. With my engine there is a 90 deg elbow fitting that goes onto the outlet of the pump that lines up perfectly with my oil cooler. The piece of hose I use is about two inches long and has no stress on it. My understanding is the elbow fitting was part of the older bed style firewall forward kit from Zenith. I don't know where the one on my engine came from because it was on the engine when I bought it used. The engine was originally installed on a 701 though, '99 vintage I believe.
Hope this helps a bit.
Doug M
CH-701/912 UL
NW Ontario, Canada
From: dashwood <dashwoodlock(at)hotmail.com>
To: zenith701801-list(at)matronics.com
Sent: Monday, June 4, 2012 9:14:42 AM
Subject: 912 and 701 oil pump connections
--> Zenith701801-List message posted by: "dashwood" <dashwoodlock(at)hotmail.com (dashwoodlock(at)hotmail.com)>
i am having a problem plumbing the oil cooler outlet to the inlet to the pump.. a 912 in a 701. it is a suction line. and the pipe and fittings are not working. plane has been flying for 11 years and 500hrs.. i have replaced this hose several times.. the fitting into the pump is a hose barb with what appears to be a 12mm 16 tpi fitting.. from there the shortest amount of hardware takes me 2" past the outlet of oil cooler.. the hoses have to return 2" and down 4" to get back to oil cooler. this line is under stress and wants to kink off oil flow.. i was just wondering what others are doing at this point. i think instead of 2 hose barbs back to back into an up size adapter into 1/2 x 90deg elbow down into 1/2hose barb, short hose to inlet barb on cooler... does not fit well and is a lot parts to get a short distance.. if i could find a fitting to go into pump that could in shorter space be adapted into standard pipe fitting would be better.. pictures would be appreciated.
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Ross Aalexander: CH701 driver 912ul 589tt
It only takes two things to fly, airspeed and money
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374663#374663
[quote][b]
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dashwood
Joined: 24 Jan 2009
Posts: 73
Location: sw ontario canada
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| Posted: Mon Jun 11, 2012 4:24 am Post subject: Re: 912 and 701 oil pump connections |
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i think i have found what i need. according to rotec i will have to re drill and tap the pump inlet from 12mm to 14 mm for the newer style fitting. the pump rads and a lot of other stuff will have to be removed and reinstalled .. ... will have to replace alll seals /orings in pump as well.. parts and shipping.. 250.00.... to replace a normall 5.oo part... only this thing is 85.00 from rotec... only cuz its metric im guessing.. normal type fitting that looks the same only pipe thread for hydrolic fiting at the local machine shop ...$5.00. lot to fly hate the price.
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192.89 KB |
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5567 Time(s) |
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Ross Alexander: CH701 driver 912ul 788tt
It only takes two things to fly, airspeed and money |
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