Posted: Thu Aug 18, 2016 6:01 pm Post subject: bolts
You are correct. The A1 had one shorter bolt because of the hand prime lever. You will need to use the same set up on the 38 if you are using the later pump.
John
Joined: Oct 02, 2014 Posts: 1909 Location: South Carolina, Dorchester County
Posted: Fri Aug 19, 2016 9:12 am Post subject:
I exchanged a non-lever pump and got a rebuilt pump with a lever back (which is ok by me). I already had 2 long bolts and used them to mount the pump with the lever (with the thick spacer under it). Neither bolt interferes with the lever. I haven't fired the motor yet. Can bad things happen using 2 long bolts? I mean other than losing points during inspection. _________________ Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51
“The only good sports car that America ever made was the Jeep."
--- Enzo Ferrari
The M38 came with two equal length bolts:
WO# 800471, ORD# 7375385 Screw, sp, hex hd, S, cd or zn-pltd, 5/16"-18NC-3 x 2".
The M38A1 used one bolt:
WO# 800471, ORD# 7375385 Bolt, hex hd, S, cd or zn-pltd, 5/16"-18NC-3 x 5 1/8".
Thru eng sn MD49065 2nd bolt was:
ORD# 122058, Bolt, machine, cap, hex hd, S, cd- or zn-pltd, 5/16"-18NC-3 x 1 7/8". (Note: This is a plain old fashion std hex head.)
From eng sn MD49066 & on, 2nd bolt was:
WO# 809689, ORD# 8332521, Bolt, machine, hex hd, sp,S, cd- or zn-pltd, 5/16"-18NC-3 x 3 1/8".
Note the difference in the primary bolt descriptions for the same bolt WO# 800471! We can guess the M38 ORD 9 referenced the threaded length of the special (sp) screw whereas the m38A1 ORD 9 referenced the overall lenth of the special (sp) hex hd bolt.
The longer forward bolt does not interfere with the pump handle operation if used on the aft side of the pump. It becomes very difficult to install and remove if used there. That is why the shorter standard hex head was used in early M38A1 production but it too was difficult to hold onto and insert and start with that handle in the way thus the late M38A1 came with a shortened version of the long hex head.
Joined: Oct 02, 2014 Posts: 1909 Location: South Carolina, Dorchester County
Posted: Fri Aug 19, 2016 11:14 am Post subject:
Thanks Wes!
Thanks Brian!
The pump was awkward to mount, but not too difficult.
Looks like I'm not going to tear anything up or lose points on inspection after all. _________________ Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51
“The only good sports car that America ever made was the Jeep."
--- Enzo Ferrari
I have used the middle bolt in both holes with no problems. If you use a 1/4" drive ratchet, 6 or 8" extension and a 1/2" flex (universal) socket they are easy to install. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
The bolt is square. That is an optical illusion caused by the light, the angle and the camera. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
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