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Old 01-08-2015, 01:11 AM   #81
Skoolie
 
Join Date: Oct 2014
Location: Maple Ridge BC Canada
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Year: 1998
Coachwork: Blue Bird
Chassis: TC2000 Rear engine
Engine: Cummins 8.3; MD3060
Rated Cap: 84
Quote:
Originally Posted by aaronsb View Post
Most hydraulic steering systems (assist or direct) have isolation or are independent of working hydraulic groups. I would suggest you consider an electro hydraulic power pack or a linear electric drive system.

I would try to keep the steering system as simple as possible if you can.
You are right the steering system has separate circuit after flow divider:


If I ever decide to use the main pump I will use hydraulic solenoid valve for isolation that will open only when energized. Also I guess I will open/close slideouts only when bus is parked.

I do understand the last thing you want to have is a lost steering assistant when you drive this 40 feet monster....

I am still thinking what way to go. I might go mechanical way: chains or cables or rack and pinion...
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Old 01-08-2015, 01:07 PM   #82
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Year: 1998
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Chassis: TC2000 RE
Engine: 8.3l Cummins
Rated Cap: 78
Use a single electrohydraulic pack and ram, and then a heavy duty chain to balance the pull to the left and right side. Use some large threaded rod and nut adjusters to ensure the pull is even on both sides?

Idunno - I've never built a big huge camper slide, just a few hook loaders and rollback chain flatbeds.

I'm guessing you'd want a double acting ram and valving setup, so something like these bits:

http://www.northerntool.com/shop/too...9766_200329766

http://www.northerntool.com/shop/too...ct_10214_10214

Hydraulics get expensive quickly.

Linear actuators are pretty cheap in comparison.

http://www.surpluscenter.com/Brands/...-5-1680-24.axd

http://www.aeicomp.com/Detail.asp?Pr...el+Tracking%29


Quote:
Originally Posted by Vlad View Post
You are right the steering system has separate circuit after flow divider:


If I ever decide to use the main pump I will use hydraulic solenoid valve for isolation that will open only when energized. Also I guess I will open/close slideouts only when bus is parked.

I do understand the last thing you want to have is a lost steering assistant when you drive this 40 feet monster....

I am still thinking what way to go. I might go mechanical way: chains or cables or rack and pinion...
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Old 01-08-2015, 04:33 PM   #83
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Year: 1946
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Chassis: 1- 1/2 ton
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You might check with "Ol' Trunt"/Jack and the thread about his '35 Chevy. He built a slideout for it that is now operational appears to be quite functional.
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Old 01-08-2015, 11:34 PM   #84
Mini-Skoolie
 
Join Date: Jan 2013
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I'd go with something like the second link provided by Aaronsb. 48" linear actuator, no hydraulic fluid to futz with. Seems simple, lightweight, relatively inexpensive and easy.

I can hear my dad's voice saying "safety first" when you talk about splicing into the power steering.

Regardless of what you use, I'm sure it will turn out fine. You do good work. Just my $0.02.
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Old 01-09-2015, 12:48 PM   #85
Bus Crazy
 
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Location: Winlcok, WA
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I would not tap into the power steering if it was my bus.

A little electric powered hydraulic pump like that used on pickup and trailer dump boxes would take care of your hydraulic needs if you decided you wanted to go with a fluid hydraulic system.

If you have air brakes why not tap into the the auxiliary air tank to power air hydraulic cylinders? If one leaks you won't have a mess to clean up.
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Old 01-09-2015, 10:47 PM   #86
Skoolie
 
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Cool

Hi all,

...check this for Rack&Pinion:

http://www.oldboyrecords.com/thebus/



...check this for Jack-Screw:

http://www.pirate4x4.com/forum/exped...-camper-7.html


Fantastic build so far!!


Cheers,

thjakits
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Old 01-13-2015, 12:40 AM   #87
Skoolie
 
Join Date: Oct 2014
Location: Maple Ridge BC Canada
Posts: 192
Year: 1998
Coachwork: Blue Bird
Chassis: TC2000 Rear engine
Engine: Cummins 8.3; MD3060
Rated Cap: 84
Finally I finished living room slide out box.... Here are some pictures:

Just one window temporary put in. There will be 4 in the front wall and one on each side.... (my wife likes light....)


From inside:


The roof from inside:


Tomorrow I will start working on sliding mechanism.
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Old 01-13-2015, 08:02 AM   #88
Bus Crazy
 
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Outstanding work!

That looks a lot more stout than any S&S slide out I have seen.

With as much strength built in you will have very little issue with racking while going in and out.
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Old 01-13-2015, 09:10 AM   #89
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So...just how long did you work for Boeing? --- Beautiful work!
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Old 01-13-2015, 01:12 PM   #90
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The slide looks great!
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