Question about cab tilt.

[Chickenbone]

Is there a limit to how far from level you can safely raise/lower the cab?

My driveway is at a slight incline and the truck sits sidehill.

 

[Mullaney]

Is there a limit to how far from level you can safely raise/lower the cab?

My driveway is at a slight incline and the truck sits sidehill.

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I would suggest that you point your truck uphill or downhill. That way you can pump it up as far as the cylinder will let you raise the cab. It shouldn't turn over - but why take a chance?

 

[Ronmar]

how much sidehill? How are your cab bushings?

A little sidehill should be OK. if you lift it and the cab latch wants to mis-align, your front bushings are probably shot. in the end, the rear mount is flexible being on air shocks, if it can handle the side loads while driving, it should be fine while lifting.

You need to be careful how much uphill as the cab may not be far past the balance point if the cab is too much uphill. the only caution IRT cab raising/lowering angle from the -10 manual goes as follows:
"Never raise cab while occupied or parked uphill on a steep grade.
Failure to comply may result in serious injury or death to personnel."

 

[Chickenbone]

how much sidehill? How are your cab bushings?

A little sidehill should be OK. if you lift it and the cab latch wants to mis-align, your front bushings are probably shot. in the end, the rear mount is flexible being on air shocks, if it can handle the side loads while driving, it should be fine while lifting.

You need to be careful how much uphill as the cab may not be far past the balance point if the cab is too much uphill. the only caution IRT cab raising/lowering angle from the -10 manual goes as follows:
"Never raise cab while occupied or parked uphill on a steep grade.
Failure to comply may result in serious injury or death to personnel."

I'm not too far out of level. Maybe between 3 and 5 degrees...ish. I have plans to level out that part of my drive so i can do a buildout of this thing. But have some insulation I want to add under the cab and plan to do that before I get to leveling out the drive. I can also just drive it up on a couple 2x10s. But also wondered for out in the field when camping and needing to some maint. or fix something.

 

[Mullaney]

I'm not too far out of level. Maybe between 3 and 5 degrees...ish. I have plans to level out that part of my drive so i can do a buildout of this thing. But have some insulation I want to add under the cab and plan to do that before I get to leveling out the drive. I can also just drive it up on a couple 2x10s. But also wondered for out in the field when camping and needing to some maint. or fix something.

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You will enjoy having "cribbing" readily available. In a box down under the bed of your truck... A bottle jack or two, some 2x10's, and some 4x10's would be nice to have as well. Use a rough cut leftover pieces or several from a saw mill.

 

[Chickenbone]

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You will enjoy having "cribbing" readily available. In a box down under the bed of your truck... A bottle jack or two, some 2x10's, and some 4x10's would be nice to have as well. Use a rough cut leftover pieces or several from a saw mill.

Are you meaning for use as a back up to prevent the cab from rocking back closed accidentally?

 

[Mullaney]

Are you meaning for use as a back up to prevent the cab from rocking back closed accidentally?

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No Sir. I was thinking you were going to build an overland box on the back of your truck. Figured having cribbing if you ever need to change a tire on the side of the road (or in the woods). Or if you go to set up your truck for sleeping, to drive up onto the boards to level out the truck...

Thought you might want the boards to be in a box separated from everything - just in case they get dirty.

You should have an upright to hold the cab up built in. And if you don't, yes sir I would find me a stiff knee that you can block the cab with - Just In Case.

 

[coachgeo]

there is a thread in here on making a safety brace. One of us knuckle heads became a crushed head when his came down. He by miracle survived. (Chucky)

Learn from Chucky..., FMTV cab support tool

I accidentally came across this while searching for something else in the TMs the other day. Cab support tool, haven't found the section yet that shows you how to use it but here it is. TM_9-2320-366-20-1, unit maintenance 1 of 5, E-4, page E-7, actual page #s are 1537-1540. I have modeled it...

www.steelsoldiers.com

 

[Ronmar]

Hence the caution to not park uphill when raising the cab. This truck has no mechanical uplock, only the hydraulic controls hold it in place

On level ground it goes past the balance point when fully raised, but only by a little. If you set the hydraulic controls to the lower position, you can walk to the front and push the cab back over the balance point by hand till gravity takes over to finish lowering the cab.

Do not work on the hydraulics with the cab raised without installing a safety brace... how to brace the cab to perform, say latch maintenance, is in the manual... if the cab is near or over the balance point, it does not require much of a brace to insure it stays there...