11-09-2020, 05:05 PM
I wanted to report the latest on my fuel system misadventure, will try to be brief .
I made two mistakes early on in the installation of the new fuel /water separator ( copy of parker/Racor 1000) .
One : The fuel hoses come down from the top of the compartment , one appears to go forward to the tank , the other toward engine compartment . I connected them to the new separator based on this false assumption ( the hoses actually cross each other near the centerline of the coach ) more on this later .
Two : It seemed that there might be too much restriction from the filter element , so I removed it . Another false assumption .
After studying photos and the old separator , I realized the fuel hoses might be backwards at the separator , and sure enough , they were . Rotated separator 180 , reconnected . Filter element still out . This was maybe a week or so ago .
Cut to Saturday afternoon . Plumbed electric pump to outlet on fuel tank , it easily picked up fuel and filled a 5 gallon container pretty quick . Looked again at Richard's words . Time to return to basics , logic . What changed between working and not ..
Started reading the Parker manual I downloaded ( HanLv doesn't send anything ) , word for word . Came across a bold lettered warning : Do not operate with filter removed , fuel flow will be blocked .
There is a spring loaded deal on the tube inside the separator that moves up , blocking a hole in the tube when filter is out . Sure enough , it's difficult to blow through with filter out , but filter in there is little resistance .
Put everything back together , made a couple attempts to get fuel flowing , no dice .
Dug out the old Aviad oil pump I ran on the racer for years until going to dry sump 20 years ago . The Aviad is a gear pump , one inch gears . Tried it first connected to the hose from the tank , outlet in a can , spinning pump with cordless drill . Pumped about four gallons into the can quickly . Moved to the hose from separator , disconnected it from primary filter , hooked up the Aviad pump to the hose . Wouldn't pull fuel . Put several oz ATF in pump inlet , started pumping fuel immediately .
Connected fuel hose back to filter quickly . Primed system by pumping fuel into secondary filter with electric pump .
Started engine , idled until it warmed up . Would hold at fast idle with light throttle , sounded good . Ran for 25 minutes , all good .
Started this morning with no priming , etc . Ran for 15 minutes , all good again .
I am guardedly optimistic , will do more start ups before venturing out .
Connecting the hoses backward started this whole thing , chasing rabbits down holes .
Thanks for all the input , much appreciated .
I will update as it happens .
Thanks to you all,
Chris
I made two mistakes early on in the installation of the new fuel /water separator ( copy of parker/Racor 1000) .
One : The fuel hoses come down from the top of the compartment , one appears to go forward to the tank , the other toward engine compartment . I connected them to the new separator based on this false assumption ( the hoses actually cross each other near the centerline of the coach ) more on this later .
Two : It seemed that there might be too much restriction from the filter element , so I removed it . Another false assumption .
After studying photos and the old separator , I realized the fuel hoses might be backwards at the separator , and sure enough , they were . Rotated separator 180 , reconnected . Filter element still out . This was maybe a week or so ago .
Cut to Saturday afternoon . Plumbed electric pump to outlet on fuel tank , it easily picked up fuel and filled a 5 gallon container pretty quick . Looked again at Richard's words . Time to return to basics , logic . What changed between working and not ..
Started reading the Parker manual I downloaded ( HanLv doesn't send anything ) , word for word . Came across a bold lettered warning : Do not operate with filter removed , fuel flow will be blocked .
There is a spring loaded deal on the tube inside the separator that moves up , blocking a hole in the tube when filter is out . Sure enough , it's difficult to blow through with filter out , but filter in there is little resistance .
Put everything back together , made a couple attempts to get fuel flowing , no dice .
Dug out the old Aviad oil pump I ran on the racer for years until going to dry sump 20 years ago . The Aviad is a gear pump , one inch gears . Tried it first connected to the hose from the tank , outlet in a can , spinning pump with cordless drill . Pumped about four gallons into the can quickly . Moved to the hose from separator , disconnected it from primary filter , hooked up the Aviad pump to the hose . Wouldn't pull fuel . Put several oz ATF in pump inlet , started pumping fuel immediately .
Connected fuel hose back to filter quickly . Primed system by pumping fuel into secondary filter with electric pump .
Started engine , idled until it warmed up . Would hold at fast idle with light throttle , sounded good . Ran for 25 minutes , all good .
Started this morning with no priming , etc . Ran for 15 minutes , all good again .
I am guardedly optimistic , will do more start ups before venturing out .
Connecting the hoses backward started this whole thing , chasing rabbits down holes .
Thanks for all the input , much appreciated .
I will update as it happens .
Thanks to you all,
Chris
1986 #89
VIN 007
Detroit 8V92 TA 475 HP
Allison four speed
Chris and Sharon Hand