M151A2 Master Cylinder Grommet
Moderators: rickf, raymond, Mr. Recovery
M151A2 Master Cylinder Grommet
I'm replacing the Master cylinderf on my M151A2. I ordered a new grommet that goes around the MC where it meets the firewall sheet metal. This is part number 8754072 and is called Boot, Dust and Brake MC Filler Neck. My new one is totally different from the old one as can be seen in the photo. The old grommet is thin and has a groove where the sheet metal is captured. The new grommet is a much thicker piece of rubber without the groove for the sheet metal. I'm assuming one is a newer design. The old one is actually in good condition. The drawing in the -20P TM (1978) appears to show what was already installed. Which is best to use?
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Last edited by glcaines on January 28th, 2023, 7:27 pm, edited 1 time in total.
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- Mr. Recovery
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Re: M151A2 Master Cylindere Grommet
That thick one is for the steering column where it goes through the floor, if that's what they sent you it's wrong.
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1960 M151 Run 1
1963 M151 Willys DoD 10-63 in Baltimore
1989 Alley Cat. "work in Progress"
NRA Life Member
American Legion Post 275 Fl
US Army 6 years 2nd Armored Cavalry Bindlach Germany
Colorado Army Nat. Guard 5 years
Md Air Guard 15 years active duty on C-130's
1963 M151 Willys DoD 10-63 in Baltimore
1989 Alley Cat. "work in Progress"
NRA Life Member
American Legion Post 275 Fl
US Army 6 years 2nd Armored Cavalry Bindlach Germany
Colorado Army Nat. Guard 5 years
Md Air Guard 15 years active duty on C-130's
Re: M151A2 Master Cylindere Grommet
Yes, that is what they sent me. I looked back at my order and I ordered the correct part. Since the old one is still in good shape I'll use it. Thanks for the help.Mr. Recovery wrote: ↑January 27th, 2023, 5:57 pmThat thick one is for the steering column where it goes through the floor, if that's what they sent you it's wrong.
EDIT: I thought the old one was in good shape. Unfortunately, the old one ripped when trying to re-install it so I'll definitely need a new one.
Last edited by glcaines on January 27th, 2023, 9:31 pm, edited 1 time in total.
M151A2 TOW Launcher
M35A3 W/W and M66 Gun Ring
FLU419
M149A1 Water Buffalo Trailer
M105A1 Trailer
XM1061E1 Trailer
M416 Trailer
M116A1 Trailer W/MEP003A Generator
M1030M1 USMC Diesel Motorcycle
M35A3 W/W and M66 Gun Ring
FLU419
M149A1 Water Buffalo Trailer
M105A1 Trailer
XM1061E1 Trailer
M416 Trailer
M116A1 Trailer W/MEP003A Generator
M1030M1 USMC Diesel Motorcycle
- Mr. Recovery
- Brigadier General
- Posts: 2901
- Joined: December 5th, 2007, 9:03 pm
- Location: New Port Richey, Fl.
- Contact:
Re: M151A2 Master Cylindere Grommet
glcaines wrote: ↑January 27th, 2023, 6:02 pmYes, that is what they sent me. I looked back at my order and I ordered the correct part. Since the old one is still in good shape I'll use it. Thanks for the help.Mr. Recovery wrote: ↑January 27th, 2023, 5:57 pmThat thick one is for the steering column where it goes through the floor, if that's what they sent you it's wrong.
You do not have the required permissions to view the files attached to this post.
1960 M151 Run 1
1963 M151 Willys DoD 10-63 in Baltimore
1989 Alley Cat. "work in Progress"
NRA Life Member
American Legion Post 275 Fl
US Army 6 years 2nd Armored Cavalry Bindlach Germany
Colorado Army Nat. Guard 5 years
Md Air Guard 15 years active duty on C-130's
1963 M151 Willys DoD 10-63 in Baltimore
1989 Alley Cat. "work in Progress"
NRA Life Member
American Legion Post 275 Fl
US Army 6 years 2nd Armored Cavalry Bindlach Germany
Colorado Army Nat. Guard 5 years
Md Air Guard 15 years active duty on C-130's
Re: M151A2 Master Cylindere Grommet
I will say this. The old 'correct' grommets (the one you are trying to replace) have a tendency to find their way down behind the firewall. Even the new ones seem to do that and I cannot describe how annoying having a new piece behave just like an old piece is.
It occurs to me that if I had had something like the piece they sent to you, and after trimming it to the correct height, I might have put it on first and then installed the grommet above it. By having a spacer behind the grommet, it wouldn't have tended to slip down in.
Something to consider, since you already have the piece in hand.
Cheers,
TJ
It occurs to me that if I had had something like the piece they sent to you, and after trimming it to the correct height, I might have put it on first and then installed the grommet above it. By having a spacer behind the grommet, it wouldn't have tended to slip down in.
Something to consider, since you already have the piece in hand.
Cheers,
TJ
Re: M151A2 Master Cylinder Grommet
I contacted the vendor and he told me that he had parted out ~100 M151A2s and that a significant number of them had the #8754072L bushings for the steering column installed around the MC instead of the #8754072. He was convinced that this was a later change. He suggested that I use it for the MC. However, to install the rubber grommet I received as he suggested requires me to remove and re-install the MC again, and that is not going to happen. Going through that exercise once was enough for me.
M151A2 TOW Launcher
M35A3 W/W and M66 Gun Ring
FLU419
M149A1 Water Buffalo Trailer
M105A1 Trailer
XM1061E1 Trailer
M416 Trailer
M116A1 Trailer W/MEP003A Generator
M1030M1 USMC Diesel Motorcycle
M35A3 W/W and M66 Gun Ring
FLU419
M149A1 Water Buffalo Trailer
M105A1 Trailer
XM1061E1 Trailer
M416 Trailer
M116A1 Trailer W/MEP003A Generator
M1030M1 USMC Diesel Motorcycle
Re: M151A2 Master Cylinder Grommet
I short, he's making claims that he cannot back up with any reliable information. Never do business with 'em again. But, as I said, there might yet be a use for your new part.
Proceed!
Proceed!
Re: M151A2 Master Cylinder Grommet
Just got one from Rapco parts... the proper one. https://www.rapcoparts.com/m15112-12.html
Take Care,
Louie
M151A2,
KA2PFL,
MVPA 27368
Louie
M151A2,
KA2PFL,
MVPA 27368
Re: M151A2 Master Cylinder Grommet
Chrome will not let me access that link since Rapco in not secure. This link will work.
http://www.rapcoparts.com/m15112-12.html
http://www.rapcoparts.com/m15112-12.html
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
Re: M151A2 Master Cylinder Grommet
RAPCO is who sold me the thick one and told me that later M151A2s had the thick one for the steering column.
M151A2 TOW Launcher
M35A3 W/W and M66 Gun Ring
FLU419
M149A1 Water Buffalo Trailer
M105A1 Trailer
XM1061E1 Trailer
M416 Trailer
M116A1 Trailer W/MEP003A Generator
M1030M1 USMC Diesel Motorcycle
M35A3 W/W and M66 Gun Ring
FLU419
M149A1 Water Buffalo Trailer
M105A1 Trailer
XM1061E1 Trailer
M416 Trailer
M116A1 Trailer W/MEP003A Generator
M1030M1 USMC Diesel Motorcycle
Re: M151A2 Master Cylinder Grommet
That is why I ordered it on the internet. I have been burned by vendors offering incorrect information. If I see a photo, I know it is the right part!
Take Care,
Louie
M151A2,
KA2PFL,
MVPA 27368
Louie
M151A2,
KA2PFL,
MVPA 27368
Re: M151A2 Master Cylinder Grommet
Product Details | VEHICULAR COMPONENTS BOOT
2530-00-678-1301 A flexible, nonmetallic item designed to prevent entry of dust, moisture and other contaminants into critical areas around vehicular steering and brake components and the like. Sealing may be either static or dynamic. The item may include mounting hardware (support plates, clamps and the like). See also BOOT, POWER TRANSMISSION COMPONENTS. Excludes BOOT, DUST AND MOISTURE SEAL.
Part Alternates: 8754072, 2530-00-678-1301, 00-678-1301, 2530006781301, 006781301
Vehicular Equipment Components | Vehicular Brake, Steering, Axle, Wheel, and Track Components
Supply Group (FSG) NSN Assign. NIIN Item Name Code (INC)
25 01 JAN 1963 00-678-1301 50683 ( BOOT, VEHICULAR COMPONENTS )
https://www.wbparts.com/rfq/2530-00-678-1301.html
2530-00-678-1301 A flexible, nonmetallic item designed to prevent entry of dust, moisture and other contaminants into critical areas around vehicular steering and brake components and the like. Sealing may be either static or dynamic. The item may include mounting hardware (support plates, clamps and the like). See also BOOT, POWER TRANSMISSION COMPONENTS. Excludes BOOT, DUST AND MOISTURE SEAL.
Part Alternates: 8754072, 2530-00-678-1301, 00-678-1301, 2530006781301, 006781301
Vehicular Equipment Components | Vehicular Brake, Steering, Axle, Wheel, and Track Components
Supply Group (FSG) NSN Assign. NIIN Item Name Code (INC)
25 01 JAN 1963 00-678-1301 50683 ( BOOT, VEHICULAR COMPONENTS )
https://www.wbparts.com/rfq/2530-00-678-1301.html
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
Re: M151A2 Master Cylinder Grommet
I received the correct boot today and it took only 2 - 3 minutes to install. It seals very well against the MC and the sheet metal. Looks very good.
M151A2 TOW Launcher
M35A3 W/W and M66 Gun Ring
FLU419
M149A1 Water Buffalo Trailer
M105A1 Trailer
XM1061E1 Trailer
M416 Trailer
M116A1 Trailer W/MEP003A Generator
M1030M1 USMC Diesel Motorcycle
M35A3 W/W and M66 Gun Ring
FLU419
M149A1 Water Buffalo Trailer
M105A1 Trailer
XM1061E1 Trailer
M416 Trailer
M116A1 Trailer W/MEP003A Generator
M1030M1 USMC Diesel Motorcycle