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#1 |
Registered User
Join Date: Mar 2016
Location: hickory, ky
Posts: 1,286
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I need a measurement PS related
Hey guys. Hopefully someone knows this off the top of their head. 1971 PS box , factory of course. The return line orifice is a NPT female flare. I need to know if it is a 7/16 or 1/2 inch thread. I have attached a photo of it with a tape measure across it. I am not a pipefitter, so Im not sure what the female should measure.
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:My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=807535 1972 K10 swb/1968 Camaro 350/4spd 1955 210 2 dr sedan/1998 RCSB Z71 |
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#2 |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,719
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Re: I need a measurement PS related
NPT and flare are 2 different types... NPT = National Pipe Thread. There are no NPT threads anywhere on the PS "plumbing". The return fitting is a 3/8" tubing with an inverted flare nut. It looks like the brass flare seat is missing from the box's return fitting.
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#3 |
Registered User
Join Date: Mar 2016
Location: hickory, ky
Posts: 1,286
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Re: I need a measurement PS related
Thanks. It makes sense. I had a short piece of brake tubing flare 3/8 that threads into the pressure side. I guess I will keep looking till I find something to work.
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:My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=807535 1972 K10 swb/1968 Camaro 350/4spd 1955 210 2 dr sedan/1998 RCSB Z71 |
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#4 | |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,719
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Re: I need a measurement PS related
Quote:
EDIT I looked up my receipt for the pressure hose. Edelmann brand part # edl-70911... It's for 75 - 78 4X4, but fits '71 2WD just fine. Last edited by RustyPile; 02-27-2022 at 02:00 AM. |
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#5 |
Registered User
Join Date: Mar 2016
Location: hickory, ky
Posts: 1,286
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Re: I need a measurement PS related
Will do. I have some 3/8 brake line. I will get there frome here. Thanks for your help.
__________________
:My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=807535 1972 K10 swb/1968 Camaro 350/4spd 1955 210 2 dr sedan/1998 RCSB Z71 |
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#6 | |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,501
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Re: I need a measurement PS related
Quote:
If I had a do-over, I might bite the bullet and use braided hoses with flare to -AN adapters.
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#7 | |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,719
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Re: I need a measurement PS related
Quote:
Here's a link to some illustrations of the hose I used. It crosses the frame in front of the pump, drops down and runs under the pump. Then straight up to the pump pressure fitting. https://www.bing.com/search?q=edl-70...ANAB01&PC=LCTS |
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#8 |
Senior Member
![]() Join Date: Nov 2013
Location: East Tennessee
Posts: 2,152
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Re: I need a measurement PS related
Inverted flare...as mentioned, the brass insert is missing
one is 5/8-18 the other is 11/16-18
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1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer ............. ![]() |
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