identifying a 5 ton axle with a locker

my blood flows OD · Jan 5, 2016

Is there any type of plank or markings on an axle that has a differencal locker in it? Or is there any thing on the truck that will tell you?
I found a M-809 style bridge truck in a bone yard and was wondering if the axles might have lockers.
once again just looking for wisdom

wheelspinner · Jan 5, 2016

Warning tags, in the cab

NovacaineFix · Jan 5, 2016

I would like to know as well.

I have heard, but not sure how reliable it is that the only 5-ton axles to have lockers were from USMC trucks, but again, not sure what to look for

my blood flows OD · Jan 5, 2016

Where In the cab is the tag? Anybody got pics?
I did read some old posts about the USMC trucks being the ones that have lockers. Any way to tell if this is a USMC truck?

Monkeyboyarmy · Jan 5, 2016

Drivers door.

my blood flows OD · Jan 5, 2016

Drivers door? Is that where it will tell me if it has a locker? Or what branch of service it was in?
I was just thinking being a bridge truck it was more then likely army Corp of engineers or sea bees. Or am I way off. I have nothing to base that off, just guessing.

thanks guys, learning is occurring.

phil2968 · Jan 6, 2016

Jack up one tire on the last axle. Grab the tire and turn it really hard forward or backwards, doesn't matter. A standard diff will not turn except for the play in the gears. A locker will unlock and the wheel will spin free until it slows down and will suddenly lock.

Monkeyboyarmy · Jan 6, 2016

Usually the warning plate is on the drivers door. But I have a 2010 USMC rebuild that has lockers but no warning plate.

sandcobra164 · Jan 6, 2016

I've seen that plate located on the driver's door, the passenger door, the glove box door on M809 series trucks, and the passenger side of the dash on M939 series trucks. All USMC trucks as I work at MCLB Albany. Quick note though, I'd perform Phil2968's test. When trucks undergo rebuild, they get stripped to the frame rails and built back up again. There is no guarantee that it came back out with the same axles installed from the factory as experienced by Monkeyboyarmy. He got lucky. If it's a bridge truck, it's likely that it does have lockers but once again, try before you buy. We have an old M812 on base with the factory 14/20 NDT's dualed in the rear and spacers on the front. It has that data plate on the glove box door. Interesting old truck and it has a TEAD rebuild tag from the mid 80's.

my blood flows OD · Jan 6, 2016

Thank you. Good to know this truck has a rebuild tag on the drivers door gusset.
I'll keep my fingers crossed. I really want lockers.

Stevepala · Jan 7, 2016

I have a set of three air activated lockers if anyone is interested.

adamsoffroadperformance · Jan 10, 2016

I've bought a few sets of the 800 series bridge truck axles and none ever had a locker. and incase no one knows those have a 3" wheel spacer on the front but the rear axles are wider and have spacers. the housing itself is 6" wider than a regular 5ton axle then they put a 1.5" on the hub too so overall they 9" wider

dilligaf13 · Jan 10, 2016

sandcobra164 said:
I've seen that plate located on the driver's door, the passenger door, the glove box door on M809 series trucks, and the passenger side of the dash on M939 series trucks. All USMC trucks as I work at MCLB Albany. Quick note though, I'd perform Phil2968's test. When trucks undergo rebuild, they get stripped to the frame rails and built back up again. There is no guarantee that it came back out with the same axles installed from the factory as experienced by Monkeyboyarmy. He got lucky. If it's a bridge truck, it's likely that it does have lockers but once again, try before you buy. We have an old M812 on base with the factory 14/20 NDT's dualed in the rear and spacers on the front. It has that data plate on the glove box door. Interesting old truck and it has a TEAD rebuild tag from the mid 80's.

sandcobra164 · Jan 10, 2016

I'd love to provide pictures but 2 problems. MCLB Albany has an issue with taking pictures on base with personal cameras. The job I have is much better than many other jobs available locally so I'll obey their policy. 2nd problem is they have DRMO'd off all but about 9 M939 series 5 tons. Most of them are M934 and only one has a locker dataplate. One M925A1 has that dataplate as well. The M812 Bridge Truck is still there as well. No other M809 series are on the base.

Recovry4x4 · Jan 10, 2016

I've not seen a bridging truck with lockers.

sandcobra164 · Jan 10, 2016

Kenny,
It has a fording kit and lockers!!! Front winch wire rope has never been payed out as it has the duck cloth wrap that has been sitting so long it's rotted from the sun. The cable lays perfectly underneath the dilapidated cover. The tires still hold air but they are the NDC 14 20's. It runs a spacer on the front axle and is still dualed in the rear. I tried to slave start it a few years ago. It spun over but never started and never made smoke. If i ever see it marked for auction, I'll send you a message. From what I can tell, it was rebuilt by DOL in Ft. Knox in the 80's, got mis-shipped to the Marine Base and never issued. Time hasn't been great to it but it's only cosmetics and probably every rubber hose needs replacing.

Stevepala · Jan 11, 2016

adamsoffroadperformance said:
I've bought a few sets of the 800 series bridge truck axles and none ever had a locker. and incase no one knows those have a 3" wheel spacer on the front but the rear axles are wider and have spacers. the housing itself is 6" wider than a regular 5ton axle then they put a 1.5" on the hub too so overall they 9" wider

The axles I have are not any wider the my M929. The measurement on the rear axle from housing flange to housing flange is the same. The front axles is also the same width. Photos are in the parts for sale section.

my blood flows OD · Jan 11, 2016

Stevepala, what model truck did those axles come outta?

Stevepala · Jan 11, 2016

my blood flows OD said:
Stevepala, what model truck did those axles come outta?

Prior application is unknown. They do have the same gear ratio as my m929.

my blood flows OD · Jan 11, 2016

The yellow paint is what has me wondering.
I remember a conversation I had with a guy a few years that I bought a M-35a2 off.
He was telling me about a truck scraper in Revere Ma. that had a set of axles like yours that came out of a truck that was an airport runway fire truck.
I remember thinking, why would a runway fire truck need lockers?
those are so nice. I'll buy them Thursday if I win power ball.

identifying a 5 ton axle with a locker

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