47-55.1 Mechanical Fuel Pump - disassembly? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**TX3100Guy** · 05-08-2022, 10:09 AM

How does one disassemble the mechanical fuel pump. The top part appears to be pressed onto the lower cast metal section?

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Name: IMG_3113.jpg
Views: 131
Size: 62.5 KB

_Ogre · 05-08-2022, 11:59 AM

that's a newer pump that can't be taken apart for repair, the crimp is permanent
the old repairable pumps had maybe 6 screws holding the halves together

still available in the aftermarket, you can see 6 bolts around the flange

mr48chev · 05-08-2022, 12:31 PM

You can't take that one apart to clean or rebuild it and put it back together and not have it leak at home. The rebuilders have special fixtures and tooling to do it.

About 41 years ago I took one apart about a mile short of the summit of the Continental divide on I 90 in Montana and cleaned the sand out of the check valve and made it to the summit where I could coast down the west side for a lot of miles until I made it to Whitehall where a young guy who was working at a gas station/shop was packing up the stuff he had in the shop for his 55 Chevy to take it home and store it because he was going in the Navy in the next few days sold me the pump he had for his 55 for 15.00.

I had gotten my pump back together enough to pump gas but it leaked. I don't think that there is any way to get one to seal on your own. The one that Ogre showed can te taken apart and rebuilt and can be clocked by the owner if the inlet and outlets are in the wrong places.

**TX3100Guy** · 05-08-2022, 02:51 PM

Quote:

Originally Posted by mr48chev

You can't take that one apart to clean or rebuild it and put it back together and not have it leak at home. The rebuilders have special fixtures and tooling to do it.

About 41 years ago I took one apart about a mile short of the summit of the Continental divide on I 90 in Montana and cleaned the sand out of the check valve and made it to the summit where I could coast down the west side for a lot of miles until I made it to Whitehall where a young guy who was working at a gas station/shop was packing up the stuff he had in the shop for his 55 Chevy to take it home and store it because he was going in the Navy in the next few days sold me the pump he had for his 55 for 15.00.

I had gotten my pump back together enough to pump gas but it leaked. I don't think that there is any way to get one to seal on your own. The one that Ogre showed can te taken apart and rebuilt and can be clocked by the owner if the inlet and outlets are in the wrong places.

Great story, thanks. I went ahead and ordered the one that Ogre showed on Amazon, it will look tons better than whats on the truck now.

**TX3100Guy** · 05-08-2022, 02:51 PM

Quote:

Originally Posted by _Ogre

that's a newer pump that can't be taken apart for repair, the crimp is permanent
the old repairable pumps had maybe 6 screws holding the halves together

still available in the aftermarket, you can see 6 bolts around the flange

That's perfect for my needs, thank you.

05-08-2022, 10:09 AM	#1
TX3100Guy Senior Member Join Date: Mar 2022 Location: Lucas, TX Posts: 458	Mechanical Fuel Pump - disassembly? How does one disassemble the mechanical fuel pump. The top part appears to be pressed onto the lower cast metal section? __________________ 1953 Chevy 3100 - 5 window 1/2 ton pickup My 1953 Chevy Work-In-Process Photo Gallery "I don't have a carbon footprint, I drive everywhere."

05-08-2022, 11:59 AM	#2
_Ogre Registered User Join Date: Jan 2012 Location: Motown Posts: 7,666	Re: Mechanical Fuel Pump - disassembly? that's a newer pump that can't be taken apart for repair, the crimp is permanent the old repairable pumps had maybe 6 screws holding the halves together still available in the aftermarket, you can see 6 bolts around the flange Attached Images __________________ cool, an ogre smiley Ogre's 58 Truk build how to put your truck year and build thread into your signature shop air compressor timer Last edited by _Ogre; 05-08-2022 at 12:07 PM.

05-08-2022, 12:31 PM	#3
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,279	Re: Mechanical Fuel Pump - disassembly? You can't take that one apart to clean or rebuild it and put it back together and not have it leak at home. The rebuilders have special fixtures and tooling to do it. About 41 years ago I took one apart about a mile short of the summit of the Continental divide on I 90 in Montana and cleaned the sand out of the check valve and made it to the summit where I could coast down the west side for a lot of miles until I made it to Whitehall where a young guy who was working at a gas station/shop was packing up the stuff he had in the shop for his 55 Chevy to take it home and store it because he was going in the Navy in the next few days sold me the pump he had for his 55 for 15.00. I had gotten my pump back together enough to pump gas but it leaked. I don't think that there is any way to get one to seal on your own. The one that Ogre showed can te taken apart and rebuilt and can be clocked by the owner if the inlet and outlets are in the wrong places. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.



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