Who would have figured

1952 - 1968, M38A1, M170, questions, discussions, regarding anything related to the M38a1 series.
Post Reply
Bosage
G-Sergeant
G-Sergeant
Posts: 32
Joined: Mon Oct 22, 2018 4:48 pm

Who would have figured

Post by Bosage » Sun Oct 06, 2019 5:58 pm

So today my son and I decided to bleed the brakes on our 52 A1. As is usual, there is always some sort of snag on our projects. This one, well, couldn’t get the lug nuts broke loose on the drivers side. Impact, cheater bar, nothing. I didn’t bother to refer to my manual because righty tighty, lefty loosie, right? Wrong...it wasn’t until I turned loose with an electric impact that I found out the drivers side are reversed threads. Go ahead and laugh - hope this helps someone else before they go full on “hulk smash”.

Kendall
G-Sergeant Major
G-Sergeant Major
Posts: 196
Joined: Thu Jun 01, 2006 2:09 pm
Location: Wichita, KS

Re: Who would have figured

Post by Kendall » Sun Oct 06, 2019 6:34 pm

The left-sided studs should be marked with an "L" (or "7" depending on how you are looking at them).

Ben Dover
Gee Addict
Posts: 47381
Joined: Sun Mar 02, 2008 2:37 pm
Location: Proving Ground

Re: Who would have figured

Post by Ben Dover » Sun Oct 06, 2019 7:23 pm

And the LH Thread Nuts usually have notches. Depending on the brand, they may have "Left" printed on the face. They are 1/2" NF Thread and the hex is 3/4" on MB/GPW M-38/M-38A1 thru early CJ-2A. There was a switch to 13/16" Hex on CJ's after Chassis no. 168642.
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

Bosage
G-Sergeant
G-Sergeant
Posts: 32
Joined: Mon Oct 22, 2018 4:48 pm

Re: Who would have figured

Post by Bosage » Sun Oct 06, 2019 7:51 pm

3 sets of mine are 13/16 and one is 3/4. My Jeep has been through several owners and it shows in places but it makes me sharper.

dpcd67
G-Lieutenant General
G-Lieutenant General
Posts: 6243
Joined: Mon Jul 25, 2011 4:41 pm
Location: Iowa

Re: Who would have figured

Post by dpcd67 » Mon Oct 07, 2019 8:36 am

Not all LH nuts have notches.
My neighbor was "helping" me last year; I had him start a nut on a bolt; he started saying Righty Tighty, Lefty Loosey;
I told him that if I ever heard him say that again I would bash his head in with a wrench. Cured him on the spot.
U. S. Army 28 years.
Armor Branch


User avatar
spillmk1
G-Corporal
G-Corporal
Posts: 18
Joined: Tue Mar 14, 2017 7:01 am

Re: Who would have figured

Post by spillmk1 » Tue Oct 08, 2019 3:52 am

dpcd67 wrote:
Mon Oct 07, 2019 8:36 am
Not all LH nuts have notches.
My neighbor was "helping" me last year; I had him start a nut on a bolt; he started saying Righty Tighty, Lefty Loosey;
I told him that if I ever heard him say that again I would bash his head in with a wrench. Cured him on the spot.
:D
1955 M38A1 Jeep
1953 M100 Trailer
1941 White M2A1 Half Track

Cal.Bar
G-Sergeant Major
G-Sergeant Major
Posts: 192
Joined: Fri Sep 02, 2016 4:49 pm

Re: Who would have figured

Post by Cal.Bar » Tue Oct 08, 2019 2:25 pm

I was very lucky to have a very knowledgeable car guy help me rebuild my MB-2A and he warned me about he lug nuts on the driver's side. I had NO idea and would have started jumping on the tire iron had he not told me of the secret. You can't blame your neighbor unless he were over 75 years old in which case he would have had personal experience with left handed lug nuts. Otherwise, how could he have known. They haven't made left hand threaded lug nuts in most of our lifetimes and then some.

User avatar
1943Willysgpw
G-Major General
G-Major General
Posts: 2704
Joined: Wed Sep 11, 2013 10:02 am
Location: Edmond, OK

Re: Who would have figured

Post by 1943Willysgpw » Tue Oct 08, 2019 2:35 pm

Well as long as everyone is 'coming clean', I have been in the Automotive industry for years and should have known better. Before I got into O.D. vehicles, I had a person bring me a M37 with monster mud tires on it. I mean these tires are tractor tires. Anyway, they had a huge steel bumper attached to the front. I had take the tires off and the 3/4 impact wouldn't touch them. (should have been a huge clue) I took a 3/4 inch breaker with a cheater bar. ...........BANG the breaker bar broke and my A.. went head first into the large steel bumper. Cracked my eye socket. Just for reference. I was 20 years younger and blame it on impatient youth. P.S. I just found a photo of it. I am adding it now.
Attachments
x.jpg
x.jpg (110.46 KiB) Viewed 243 times
"None of us are as smart as all of us"

1942 GPW 1871 DoD 2-27-42 Dallas Plant
1945 GPW 247890 DoD 1-26-45 Louisville Plant
1942 GTB 136166 DoD 9-18-42
1942 GTB 135938 DoD
1952 M100

dpcd67
G-Lieutenant General
G-Lieutenant General
Posts: 6243
Joined: Mon Jul 25, 2011 4:41 pm
Location: Iowa

Re: Who would have figured

Post by dpcd67 » Tue Oct 08, 2019 6:16 pm

Wow, that hurt.
The story about my neighbor was not about lug nuts; We were installing an engine/ transmission/transfer case pack into an M38. No left handed nuts involved. He just didn't know which way nuts tightened.
U. S. Army 28 years.
Armor Branch

Bosage
G-Sergeant
G-Sergeant
Posts: 32
Joined: Mon Oct 22, 2018 4:48 pm

Re: Who would have figured

Post by Bosage » Thu Oct 10, 2019 4:51 pm

Well, lesson learned for me. I guess I can say with much authority that life is a lot more difficult when you’re dumb (or uninformed).

JMZ421
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 338
Joined: Sat Jun 02, 2012 2:21 pm

Re: Who would have figured

Post by JMZ421 » Fri Oct 11, 2019 9:34 am

Not dumb, I bet you take your Jeep to a garage for a rotation and their best mechanic would do the same thing, unless he 70 plus years of age. I just now looked in the TM page 300 and does explain how to remove the wheels though. Left handed threads; I guess the engineers thought the lug nuts would come off but that was not the case. John

Post Reply

Return to “M38a1 Technical Knowledge Base”

Who is online

Users browsing this forum: No registered users and 36 guests