Hummer H1 axles

"The man in the iron mask" (Themanintheironmask) 09/25/2013 at 20:43 • Filed to: Mechanics

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i was visiting a military base, and i was waiting on a bench and in front of me was a parked hummer H1. I was looking at it and i noticed something interesting, the axles were not at the center of the tires.

6cyl > The man in the iron mask 09/25/2013 at 20:45

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Because clearance

Blondude > The man in the iron mask 09/25/2013 at 20:46

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Portal axles . They are quite awesome.

pdthedeuce > The man in the iron mask 09/25/2013 at 20:46

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yup, portal axles...

http://en.wikipedia.org/wiki/Portal_ax…

The Transporter > The man in the iron mask 09/25/2013 at 20:52

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Well, not to be "that guy," but unless you were looking at the civilian version, you were looking at a HMMWV, not a Hummer.

The man in the iron mask > The Transporter 09/25/2013 at 20:57

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the humvee yes

doodon2whls > The man in the iron mask 09/25/2013 at 21:04

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One of the main KPP's for the HMMWV was mobility. To gain ground clearance, the powertrain is 'high up' in the chassis. To reduce the included halfshaft angle to the wheel hubs, they employ portal hubs (aka geared hubs). A PITA to keep well maintained, but critical to mobility...

If you look closely, you'll also notice no brake hardware in the wheel... This is because the HMMWV has inboard mounted brake discs.

Ramblin Rover - The Vivisector of Solihull > The man in the iron mask 09/25/2013 at 21:09

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Unimogs have portal hubs with a straight axle. Very rugged, but tend to overheat in road use at any speed above "slow".

Frank Grimes > The man in the iron mask 09/25/2013 at 21:11

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some 4 wheel magazine that comes to my house for some reason built a portal axle equipped F250...I approve. Lots more ground clearance with same lift height and lower gearing.

Milky > The man in the iron mask 09/25/2013 at 21:14

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Dem' portal axles doe ....

The man in the iron mask > doodon2whls 09/25/2013 at 21:14

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well i hadn't thought of the brakes thanks for sharing that, where are the brake disks, on the axles? or the driveshaft? like a monster truck?

edit-
never mind i got the picture

doodon2whls > The man in the iron mask 09/25/2013 at 21:35

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You got it (although, that's not a HMMWV)... each corner has its own disc brake mounted to the side of the differential and the halfshaft bolts to the rotor hub.

P.S. it's amazingly hard to find public pics of this stuff that I used to see at work regularly...

banjo cat ghost of oppo past > The man in the iron mask 09/25/2013 at 22:39

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a aaAAAWWE SHIT IT'S A PORTAL AXLE PARTY YAWLL

Volvo C303

Hand's down my preference over the Unimog. More utility space and Does not have the inflated fanboy prices...perhaps I should've kept this to myself.

The man in the iron mask > doodon2whls 09/26/2013 at 07:35

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ah yes it wasnt of a humvee, i said "i got the picture" meaning that now i knew how it looked like, that looks like a PITA to change rotors