Removing Installed Fuel Pump
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- Sergeant Major of the Gee
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Removing Installed Fuel Pump
I need to service my GPW fuel pump and can't get to the bolt on the left side. Any method to get this done. I did not cut a slot in the bolt head when I installed the pump.
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- Jeep Heaven
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Re: Removing Installed Fuel Pump
Quarter inch socket set, 1/4" drive ratchet, 6" or 10" extension, 1/2" 6 Point socket. It will come off like magic. With correct tools one can change the fuel pump in less than 20 minutes.
NOTE: do not install a bolt that will contact the Camshaft. Original bolts were 5/16"-18 X 7/8" with split lockwashers. 3/4" length works OK.
NOTE: do not install a bolt that will contact the Camshaft. Original bolts were 5/16"-18 X 7/8" with split lockwashers. 3/4" length works OK.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO
- Chuck Lutz
- Gee Addict
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Re: Removing Installed Fuel Pump
To add to Joel's post....when you bolt it back on, if you can't compress the spring-loaded arm to get a bolt started, just tap the starter (with the ignition OFF) to rotate the pump cam lobe away.
Chuck Lutz
GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947
GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947
- dpcd67
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Re: Removing Installed Fuel Pump
When I reinstall them, I cheat and use an Allen head bolt; makes it 1000 times easier to install and remove.
On the M38, it uses a bolt with a two inch tall head on it that is readily accessible. Hard lesson learned and corrected.
On the M38, it uses a bolt with a two inch tall head on it that is readily accessible. Hard lesson learned and corrected.
U. S. Army 28 years.
Armor Branch
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Re: Removing Installed Fuel Pump
Do not install M-38 Bolts, about 5/8" too much thread, the M-38annd M-38A1 use a very thick Spacer (800361). The M-38 bolts will contact the Camshaft.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO
- Mark Tombleson
- MZ Radio Operator
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Re: Removing Installed Fuel Pump
For your GPW, don't forget to cut a slot in your F marked bolt like my originals... so you have the option of using a screwdriver!
MB-NAVY-MZ-1 352625 - 07/20/44 (DOD est.)
U.S.N. 133818
2nd place Restored Class 2008 Portland Convention
MVPA Hall of Fame - 2013
U.S.N. 133818
2nd place Restored Class 2008 Portland Convention
MVPA Hall of Fame - 2013
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- G-Brigadier General
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Re: Removing Installed Fuel Pump
I did that on my previous jeep Mark. It worked brilliantly, and saved a lot of spitting and swearing.
- dpcd67
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Re: Removing Installed Fuel Pump
Of course do not use an M38 bolt; the point is that they recognized that a standard short hex bolt was a bad idea and corrected it.
Last edited by dpcd67 on Fri Mar 23, 2018 5:09 pm, edited 1 time in total.
U. S. Army 28 years.
Armor Branch
Armor Branch
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- Sergeant Major of the Gee
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Re: Removing Installed Fuel Pump
Thanks for the replies and I read previous posts that recommended the 1/4" socket and extension. I have a 1/4" drive Craftsman socket set and I have tried every way I can think of but the socket will just not grip the bolt head. Close, but no cigar!!!!
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- G-Sergeant Major
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Re: Removing Installed Fuel Pump
I tried the same 1/4 inch Craftsman socket set and had the same problem. The diameter of the socket was to large so I ground the diameter slightly and also shortened the length of the socket (I shortened the 6 point end, the end that goes on the bolt) and that let it clear the obstacles and worked great. I have used it on several engines now without any problems.
Dave
Willys MB
MB1286xx
DoD Mar 17, 1942
Restoration 100%
Willys MB
MB4080xx
DoD Jan 18, 1945
Restoration 100%
Willys MB
MB1286xx
DoD Mar 17, 1942
Restoration 100%
Willys MB
MB4080xx
DoD Jan 18, 1945
Restoration 100%
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- Sergeant Major of the Gee
- Posts: 263
- Joined: Sun Feb 12, 2012 2:07 pm
- Location: Comfort, Texas
Re: Removing Installed Fuel Pump
I will try that. Thanks!
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- Sergeant Major of the Gee
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Re: Removing Installed Fuel Pump
My trick, for left side screw at least.
Petr
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1944 GPW 194969 - Louisville Plant
1945 MB 423482 - ex Greek Army (salad)
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1944 GPW 194969 - Louisville Plant
1945 MB 423482 - ex Greek Army (salad)
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- Jeep Heaven
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Re: Removing Installed Fuel Pump
My 1/4" Drive Set is Snap-On, the socket fits perfect. Try the similar CCKW Fuel Pump if you think the Jeep is tough.-Takes a few hours.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO
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- Sergeant Major of the Gee
- Posts: 263
- Joined: Sun Feb 12, 2012 2:07 pm
- Location: Comfort, Texas
Re: Removing Installed Fuel Pump
I tried the shortened socket and was able to move the fan side bolt but I think my reproduction fuel pump must be slightly larger at the base near the bolts. I will definitely be able to remove it but will use one of the modification options for and replace the fan side bolt upon reinstallation. That to all for the suggestions.
- MrVisB
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Re: Removing Installed Fuel Pump
We found that the only difference to the first tool set solution was to use the extension with a wobble head feature. That let us maneuver the bolt into position to start tightening by hand, then get the rear/ right bolt in to pull the pump body into position. Then back and forth till tight.
Oh and also dropped a loose nut into the socket to get the left bolt started while keeping the bolt shaft forward. Otherwise, the bolt keeps sliding deep in the socket and there isn't enough sticking out to get the threads started.
Oh and also dropped a loose nut into the socket to get the left bolt started while keeping the bolt shaft forward. Otherwise, the bolt keeps sliding deep in the socket and there isn't enough sticking out to get the threads started.
-HB
43 Ford GPW 92511
Anybody ever seen my original engine?
43 Ford GPW 92511
Anybody ever seen my original engine?
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