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Joined: Feb 2007
Posts: 160
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Feb 2007
Posts: 160 |
Does the new diaphram need to be pre-loaded or anything when assembling??
Heart of Route 66 Region (Okla) VCCA
Chevys: 1929 LQ 1.5T; 1930 LR 1.5T; 1932 BA 5 pass coupe; 1941 Chevy 1.5T US Army Fire Truck, my vintage '82 Chevy Motor Home
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Joined: May 2002
Posts: 6,149 Likes: 42
ChatMaster - 6,000
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ChatMaster - 6,000
Joined: May 2002
Posts: 6,149 Likes: 42 |
When assembling the joint where the diaphram is I start all screws to finger tight then operate the arm to its full travel before tightening all screws down fully. This ensures the diaphram has enough flexibility to cope with the actual movement required.
Tony
1938 1/2 ton Hope to drive it before I retire
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Joined: Nov 2001
Posts: 5,906 Likes: 8
Former ChatMaster ChatMaster - 5,000
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Former ChatMaster ChatMaster - 5,000
Joined: Nov 2001
Posts: 5,906 Likes: 8 |
I agree. You always want to assemble the fuel pump in a "loaded" condition. Squeeze the lever, so that the diaphragm is at least level with the two base halves. While holding it there, tighten all of the screws.
Don't assemble it with the diaphragm in the (slack) "up position".
-Bill
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
Here is what the Chevrolet repair manual states about the placement of the diaphragm when assembling the fuel pump: "Exert pressure upward on the linkage. This forces the diaphragm to its extreme high position and while it is held in this position, the cover screws should be tightened alternately and securely."   
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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