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willysmjeeps.com :: View topic - M38 CDN L-134 willys Fuel Pump
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M38 CDN L-134 willys Fuel Pump

 
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Lyle
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Joined: Nov 01, 2017
Posts: 29
Location: Richmond, BC Canada

PostPosted: Sun Dec 23, 2018 9:40 pm    Post subject: M38 CDN L-134 willys Fuel Pump Reply with quote

I'm installing an Airtex 9562 fuel pump with Vacuum.

Looking for any documentation and/or constructive comments.

It does not have the single port for connecting to venting system from the bell-housing to Transfer-case.

My thoughts are to install a TEE between the outflow of air from Airtex 9562 and the Check Valve connecting to the bell-housing and transfer-case.

That way the Bell-Housing and Tranfser-case will never over pressure since the cracking pressure of the check valve will be 2PSI.
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Lyle
LT-RCEME, Retired
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Jeep Rubicon, 2015
M38 CDN, 1952
M416, 1968
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wesk
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Joined: Apr 04, 2005
Posts: 14044
Location: Wisconsin

PostPosted: Sun Dec 23, 2018 10:52 pm    Post subject: Reply with quote

Quote:
I'm installing an Airtex 9562 fuel pump with Vacuum.
Looking for any documentation and/or constructive comments.


Review your fuel pump specs in the TM 9-8012 page 151. Calls for a pump output pressure of 4 to 5 1/4 PSI. Your new Airtex 9562 pump specs:
Quote:
Mechanical Pump 9562
Airtex mechanical fuel pumps are designed to meet or exceed OEM specifications for fit and performance. Precision castings and hardened rockers help ensure a long life. Advanced polymer pump diaphragms help ensure consistent performance in multiple fuel blends.

A new fuel filter is recommended when replacing.

Product Features:

Coverage for classic, performance and non-fuel-injected vehicles.
100% factory tested: Every single pump is 100% tested throughout the entire manufacturing process for worry free, out of the box performance.

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

Gasket Included Y
Inlet Count 1
Inlet Type Threaded
Maximum Pressure Rate (psi) 3.75
Minimum Free Flow Rate (gph) 15 GPH @ 1000 RPM
Minimum Pressure Rate (psi) 2.5
Outlet Count 1
Outlet Size 1/4-18 NPSF
Outlet Type Threaded
Package Contents Pump & Kit
Warranty Limited 1 Year

Warranty Information:
12 Months


Do not compare well in the output pressure. The Airtex 4032 is a little better choice but uses straight tube nipples.

Quote:
My thoughts are to install a TEE between the outflow of air from Airtex 9562 and the Check Valve connecting to the bell-housing and transfer-case.

Waste of time if you do not plan on deep water fording your M38. Not the best way if you do plan on fording. Vacuum side of that port is 10 to 12"
which is equivalent to 5.9 PSI when driving the jeep which is a lot higher than the 2 to 3 PSI used in the crankcase and tranny/transfer fording system. You mention a check valve. Where is this check valve that cracks open at 2 PSI.

There is a very ample supply of the correct rebuilt AC fuel pumps and the correct rebuilding kits to question any need to substitute an unqualified Airtex unit.

More discussion can be found here: http://www.willysmjeeps.com/v2/modules.php?name=Forums&file=viewtopic&t=5974&highlight=
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