Help with tow hitch plunger
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Help with tow hitch plunger
I've machined up a new plunger pin from Jeepdraws drawings . I just need some help from someone else on how they held the inside part of the 3/8 rod to bend the outer part at 90% as I can't get it into my bench vice also how hot to heat it ?? Dale
Port Macquarie - NSW - Australia
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Re: Help with tow hitch plunger
Heat the rod red hot at the precise point you want to bend it. Slip a small length of pipe over it as leverage to bend it. Takes half a minute.
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Re: Help with tow hitch plunger
So you don't clamp the inside of the bend just hold it out from the casting ? Dale
Port Macquarie - NSW - Australia
- Chuck Lutz
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Re: Help with tow hitch plunger
Joel's got it correct.....the spring on the shaft holds the plunger in one of the holes in the Landing Leg Bracket and by pulling on the end, you move the plunger out of the way so the LLB can pivot to the position you want. With that in mind, hold the Drawbar Bracket with the Landing Leg Bracket removed upside down and move the pin/plunger/spring assembly back and forth to note the travel that must be allowed for it to function properly.
When you let go of the pin so the plunger goes back in through the opening where the LLB would be if it was installed...you can now see where you need to hear/bend the pin to keept it from going back OUT the other side.
FYI...my trailer pin has 1/2" of exposed pin before the 90' bend...
When you let go of the pin so the plunger goes back in through the opening where the LLB would be if it was installed...you can now see where you need to hear/bend the pin to keept it from going back OUT the other side.
FYI...my trailer pin has 1/2" of exposed pin before the 90' bend...
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
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Re: Help with tow hitch plunger
The Plunger rests against a 1/4" X 3/4" coarse thread screw" which acts as a stop. Sometimes this screw is missing or broken off. The Set Screw is located at the extreme RH side of the bore for the plunger.
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Re: Help with tow hitch plunger
I was wondering what that hole was for . If you look at the top photo you can see the hole on the left side for that set screw to go in , and yes it is broken off . I'll drill and tap that first I did have my plunger set at about half way through the outer hole and the same the other side and marked the bend point . so what you guys are saying is if i have the set screw in place for the plunger to sit up against like Chuck tells us the bend is 1/2 inch out side the casting ? Dale
Port Macquarie - NSW - Australia
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Re: Help with tow hitch plunger
1/2 to 1", these were all bent after installation and they will vary a bit. You need room to grip the handle end of the plunger.
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Re: Help with tow hitch plunger
Dale,
The instructions are with the drawing......
"This is the bend point. Mark the rod. Pull the
3/8" end through, clamp the rod when it's fully
withdrawn. Heat the marked point and bend
down 90 degrees. Cool the rod before
allowing it to retract into the housing."
Maybe I should do a sketch and add it to the drawing.
The instructions are with the drawing......
"This is the bend point. Mark the rod. Pull the
3/8" end through, clamp the rod when it's fully
withdrawn. Heat the marked point and bend
down 90 degrees. Cool the rod before
allowing it to retract into the housing."
Maybe I should do a sketch and add it to the drawing.
Jon Rogers
AUSTRALIA
http://jeepdraw.com JeepDraw Home Page & Drawings
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1944 GPW195611 20531384 ACM-2 17781
1942 MBT 19433W
AUSTRALIA
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1944 GPW195611 20531384 ACM-2 17781
1942 MBT 19433W
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Re: Help with tow hitch plunger
I've now taped the hole for the stop bolt all works well .. Now I can heat and bend the handle Thanks Jon .. Dale
Port Macquarie - NSW - Australia
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Re: Help with tow hitch plunger
You sure about the coarse thread Joel ?Ben Dover wrote:The Plunger rests against a 1/4" X 3/4" coarse thread screw" which acts as a stop. Sometimes this screw is missing or broken off. The Set Screw is located at the extreme RH side of the bore for the plunger.
Dale.........And I think it's a SET screw, not a a machine thread screw as shown. I'm not 100% sure tho'.
Chuck !. what do you think ?
JR
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Jon Rogers
AUSTRALIA
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1942 MBT 19433W
AUSTRALIA
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- Chuck Lutz
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Re: Help with tow hitch plunger
Set screw....1/4-20 national fine....3/4" long.
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
- Jon
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Re: Help with tow hitch plunger
Thanks Chuck. I figured as much......
JR
JR
Jon Rogers
AUSTRALIA
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1944 GPW195611 20531384 ACM-2 17781
1942 MBT 19433W
AUSTRALIA
http://jeepdraw.com JeepDraw Home Page & Drawings
Parts Colours Page http://jeepdraw.com/PART_COLOURS.htm
1944 GPW195611 20531384 ACM-2 17781
1942 MBT 19433W
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Re: Help with tow hitch plunger
Yes I am sure about that Coarse Thread , and yes it is a "Set" Screw, most Set Screws are coarse thread, (Fine does exist) this one is a "socket head".
I did not mention the type as I was indicating that a screw was located at the opposite end of the plunger bore as a "stop" for the plunger to rest on. The Set Screw is WO-53035, Bantam No. 62X2 and Ord No. 102379 AKA as a Bolt in some SNL's. I was going by memory as my Trailer Manuals were in another room.
FYI,
1/4-20 = NC Thread
1/4-28 = NF Thread
The similar casting on the M-100 also has the same coarse thread 3/4" Allen Head Set Screw that acts as a stop for the plunger.
And Uncle Sam's Army trained me to be a Machinist at APG exactly 50 years ago.
Sorry Chuckie It's very easy to arrive at 1/4-20 as being fine Thread due to the number 20 sounding like a lot of threads.
I did not mention the type as I was indicating that a screw was located at the opposite end of the plunger bore as a "stop" for the plunger to rest on. The Set Screw is WO-53035, Bantam No. 62X2 and Ord No. 102379 AKA as a Bolt in some SNL's. I was going by memory as my Trailer Manuals were in another room.
FYI,
1/4-20 = NC Thread
1/4-28 = NF Thread
The similar casting on the M-100 also has the same coarse thread 3/4" Allen Head Set Screw that acts as a stop for the plunger.
And Uncle Sam's Army trained me to be a Machinist at APG exactly 50 years ago.
Sorry Chuckie It's very easy to arrive at 1/4-20 as being fine Thread due to the number 20 sounding like a lot of threads.
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
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- Jon
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Re: Help with tow hitch plunger
I think we need a photo of an original so we're all on the same page here.
The SNL for the Trailer notes it as a NF set screw, OK, we know that 20NF doesn't exist, and yes Joel, I've had a Caxton's Engineers Handbook since 1965, and I've been a tradesman since so I know my onions in this department too.
The SNL doesn't list it as a Socket type. Socket types are not full threaded, but then again, maybe that stops it disappearing into the hole.
The SNL for the Trailer notes it as a NF set screw, OK, we know that 20NF doesn't exist, and yes Joel, I've had a Caxton's Engineers Handbook since 1965, and I've been a tradesman since so I know my onions in this department too.
The SNL doesn't list it as a Socket type. Socket types are not full threaded, but then again, maybe that stops it disappearing into the hole.
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Jon Rogers
AUSTRALIA
http://jeepdraw.com JeepDraw Home Page & Drawings
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1944 GPW195611 20531384 ACM-2 17781
1942 MBT 19433W
AUSTRALIA
http://jeepdraw.com JeepDraw Home Page & Drawings
Parts Colours Page http://jeepdraw.com/PART_COLOURS.htm
1944 GPW195611 20531384 ACM-2 17781
1942 MBT 19433W
- lucakiki
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Re: Help with tow hitch plunger
Jon,just to be sure,what would be wrong for the normal average guy in following exactly what the manual lists?
Luca
WillysMB#344142 6-19-44 Navy N.S.Blue Grey
45 Bantam T-3 #57248 1-10-45
42 Willys MB-T #13560 11-42
43 Willys MB-T # 25417 4-43
Way too many WWII military tools,hopefully thinning down,and way too many posts...
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WillysMB#344142 6-19-44 Navy N.S.Blue Grey
45 Bantam T-3 #57248 1-10-45
42 Willys MB-T #13560 11-42
43 Willys MB-T # 25417 4-43
Way too many WWII military tools,hopefully thinning down,and way too many posts...
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