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Armor/AFV
For all military ground-force modelling subjects.
My first HEMTT - the Italeri LHS
HeavyArty
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Posted: Tuesday, November 15, 2016 - 09:04 PM UTC

Quoted Text

H.P. - Very nice detail shots towards the end of the post of a HEMTT A4 PLS!



Actually, the latest version of the PLS is the A1; i.e. M1074A1/M1075A1. It has most of the same features as the HEMTT A4 and is the same basic updated version. There was never an A2 (or proposed A3) version of the PLS, hence only the A1 version so far.
165thspc
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Posted: Tuesday, November 15, 2016 - 09:09 PM UTC
Right - I can and will edit that.
165thspc
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Posted: Wednesday, November 30, 2016 - 06:45 PM UTC
Something of interest found recently:





Note Below: Lift handle is off-set to the front of the vehicle, not centered.
165thspc
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Posted: Friday, December 02, 2016 - 11:08 PM UTC
Pattern for setting the steering angles on the front two HEMTT axles just found thanks to Matt Leese and Dennis Struk:
(Just referring to the angles of the four wheel drums - not the linkage or anything else.)



Thanks Matt and Dennis.
HeavyArty
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Posted: Saturday, December 03, 2016 - 05:33 AM UTC
As a note, the above steering pattern is for HEMTT A4 versions which have TAK4 front suspensions. A1 and A2 HEMTTs use a standard steering system with two steering boxes and steering arms on the left side of the frame. The below pic was shows earlier in this thread. The front of the vehicle is to the right.

165thspc
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Posted: Saturday, December 03, 2016 - 06:03 AM UTC
Gino - I was only referring to the angle of the wheels after all the other toe-in discussion.
HeavyArty
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Posted: Saturday, December 03, 2016 - 06:44 PM UTC
Ah, OK. I was a little confused and thought others might be too. Just wanted to clarify.
165thspc
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Posted: Saturday, December 10, 2016 - 12:21 AM UTC
Deleted
165thspc
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Posted: Monday, December 19, 2016 - 10:59 PM UTC


Season's Greetings
lindsayp
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Posted: Tuesday, January 03, 2017 - 09:21 PM UTC
This picture of the brake lines is very confusing , pictures of the M983 show 2 lines coming from each can. in this picture 1 from each can go to the brake valve , so my question is where do the other lines on the can go to??
165thspc
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Posted: Tuesday, January 03, 2017 - 11:18 PM UTC
If you are talking about the two drawings back on page 18 I totally agree they are confusing. You must superimpose the two drawings over each other to see the entire system.

One represents the parking brake system and the other, the service brakes.

Remember Dustin said these large rear brake cans are actually double acting cans that contain both the parking brake and the service brake actuators in the same can. So both hoses run from each brake can to the equalizer valves for a total of four hoses per valve. Then there are two feeder hoses per valve; one for the service brakes and one for the parking brakes. Therefore a total six hoses per valve.

F.Y.I. on my HEMTT, at this point, the two feeder air hoses to each valve HAVE NOT yet been modeled.

Upon starting the engine (and therefore the air pump) the first thing that happens is the service brake system gets charged with air and this allows the service brakes to function. After that the parking brake system gets charged with air and only then does this release the parking brakes.*

I am sure someone else may have a better way to express all this.


*The parking brakes are normally held "ON" using a spring and are released only when that part of the actuator can gets charged with air. Any loss of air in an emergency causes these brakes to be applied.

The service brakes are normally "OFF" and only get applied when air is sent from the brake peddle air control valve to the other side of the brake actuator can.
lindsayp
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Posted: Wednesday, January 04, 2017 - 12:24 AM UTC
ok excellent that makes the whole thing much clearer thanks.but my next question is from brake valve there are 2 lines going up front correct? where do they go? I'm guessing one to air dryer?
lindsayp
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Posted: Wednesday, January 04, 2017 - 12:37 AM UTC
this picture is what I'm talking about that's confusing it shows just 2 lines from left rear brake can going to the valve and the other lines from the right can going to the valve on the other side of the cross member



http://data.primeportal.net/m983/165271788ByZPBB_fs.jpg



165thspc
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Posted: Wednesday, January 04, 2017 - 01:27 AM UTC

Quoted Text

ok excellent that makes the whole thing much clearer thanks.but my next question is from brake valve there are 2 lines going up front correct? where do they go? I'm guessing one to air dryer?



One feeder line goes to one air tank and the other goes to another. The tank for the service brake system fills up first then the parking brake tank. Between these two tanks there is a resister valve set for about 27psi. This valve guarentees that the service tank fills up first and then the parking brake tank.
lindsayp
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Posted: Friday, January 13, 2017 - 12:55 AM UTC
any chance you have a pic of these lines and to which tank they go, I'm really trying get the lines accurate as possible. also I'm looking for diagram of the ower steering hoses. by the way thanks so much for all your help .
165thspc
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Posted: Saturday, January 14, 2017 - 08:12 AM UTC
Here are the schematics for the steering hydraulics. I have not found anything (yet) on the routing of the piping to the air reserve tanks.



165thspc
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Posted: Saturday, January 14, 2017 - 09:33 AM UTC
And here is the air tank info:



lindsayp
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Posted: Monday, January 16, 2017 - 12:01 AM UTC
Mike this helps a lot thanks so much
lindsayp
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Posted: Friday, January 27, 2017 - 05:54 AM UTC
you would happen to have any pics of the electrical cables running from brake lights and so on ?
165thspc
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Posted: Thursday, February 09, 2017 - 03:57 AM UTC
Taillight wiring:
165thspc
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Posted: Thursday, February 09, 2017 - 04:01 AM UTC
This is how I handled the taillight wiring:
165thspc
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Posted: Thursday, February 09, 2017 - 04:14 AM UTC
Still a few details to finish before the HEMTT's first hobby competition on the 18th:


HeavyArty
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Posted: Thursday, February 09, 2017 - 07:30 AM UTC
It looks really good. Nice weathering and paint finish. Have you decided on a load for it?
165thspc
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Posted: Thursday, February 09, 2017 - 09:10 AM UTC
Not yet. For now I am going to display it with the LHS and empty flat rack partially up in the air. (Was kind of waiting for your inspiration on that score.)
Taylornic
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Posted: Friday, February 10, 2017 - 01:20 AM UTC
Me likey! Good luck at the Comps!