S75 Overland Truck Build

Vehicle prep and projects

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ralph
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Location: Warwickshire

Re: S75 Overland Truck Build

Postby ralph » Mon Jul 09, 2018 8:32 am

Its been a long time since I posted my original post but I have finally returned to the UK and got started on the truck about a 6 weeks ago. I had a few mechanical issues to sort out which took far longer than expected but all are now cured apart from the brake safety valve which needs a replacement.
Anyway I decided to make use of the good weather and got started on the framing

Which as you can see has progressed nicely over the last two weeks, working in the evenings and both weekends....hot work but better than rain!!
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ralph
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Re: S75 Overland Truck Build

Postby ralph » Mon Jul 09, 2018 8:48 am

The aluminium sheet is being delivered this week so hopefully the skin will go on starting this weekend. I still have a few jobs to do on the frame first I have to fix the spring mounts at the front, finish the slide out for the door way, waxoyl all the frame work de-grease and stick some 3 mm rubber spacers on ready for the adhesive.
I have gone with 2 mm sheet for the sides and 3 mm chequer plate for the roof and front and rear angles - heavier than I intended but better I think.
I am just thinking about where I want to mount the spare wheel and at the moment its either under the rear chassis over hang or on the rear wall - I have welded in some heavier sections into the rear frame to allow for bolting a mount there but cant make my mind up.
I will be ordering the insulation later this week, 50mm of celotex, and then I will need to decide what to line the inside with at the moment I am thinking 6mm ply sheets with the visible bits covered with 3 mm vinyl faced ply from moorland but as anyone got any other suggestions that are lighter but no more expensive.
I intend to place wooden battens in the frame at key points where I want to fix furniture. So maybe 6 mm ply is too much but since I intend to glue the insulation panels to the outer and inner skins it will add to the structural strength of the box.

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Reece
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Re: S75 Overland Truck Build

Postby Reece » Mon Jul 09, 2018 9:08 am

Looks great! What do you think the build weight will be? I've just got really confused with mine. The S75 is supposedly called that because it's a 7.5T truck... though the manufacturing plate in the door well says GVW (MAM) is 6T. I don't know what mine weighs and I'm not sure I want to know...

ralph
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Re: S75 Overland Truck Build

Postby ralph » Mon Jul 09, 2018 9:43 am

I believe that on an S75 fitted with twin rear wheels is 7.5 tons and if single wheels it is 6.6 tons.
I worked the total weight out when i was planning and it was well within but i need to look at it again as i have added some slightly heavier framing in places and am going for thicker aluminium.
If i used all the steel and aluminum sheet I have ordered, which I haven't, the frame and sides would be about 750 KG. Two of us were able to carry the side frames and the sub frame (one at a time :D) so cant be that heavy.
The plywood for the floor and inside lining is the weighty bit i suspect it will be another 400 KG and then there is the furniture and water tanks / waste etc to add to that also all the other stuff that will be loaded into it.
As i said the GVW is 6.6t for single rear wheels and the cab chassis weighs just below 2.5t so I have 4 tons maximum to play with but I want to come in at about 3t which will be about 60% of what the chassis is designed for.
Maybe I will have to leave the wife at home, and all her excess luggage, and go by myself :lol: :lol:

DaveS
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Re: S75 Overland Truck Build

Postby DaveS » Mon Jul 09, 2018 4:21 pm

Good work. That box looks huge, but I guess that's just in relation to the cab height (being relatively low)?

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Reece
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Re: S75 Overland Truck Build

Postby Reece » Mon Jul 09, 2018 8:58 pm

Yeah and I guess your water and diesel are going to add up to about 400kg when all done. What wheels & tyres are you running?

ralph
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Re: S75 Overland Truck Build

Postby ralph » Mon Jul 09, 2018 10:23 pm

Its 3.1m ground to roof looks higher as you say because the cab sides are low over the chassis. The frame is 2.1m high so internal height will be just under 2.0m.
Wheels are split rims with 9.00x16s.

robin101fc
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Re: S75 Overland Truck Build

Postby robin101fc » Sun Aug 05, 2018 8:09 am

Nice build.
Good luck with finding 9.00x16 tyres, they're no easy to find and pretty expensive.
I'm running an RB44 with converted Radio body as a camper so I envy you the extra space you'll have, especially the headroom!

grandison
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Re: S75 Overland Truck Build

Postby grandison » Sun Aug 05, 2018 2:09 pm

Now that has made my day , another camper build being done on the drive .
Great project.

ralph
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Re: S75 Overland Truck Build

Postby ralph » Sun Aug 05, 2018 9:14 pm

Well the Aliuminium skin is on , primed and the first top coat is on. Also I have cut all the angle aluminium for the edges and corners and I have the Z section and u channel for the side doors and frames.
I managed to pick up 15 8x4 sheets of celtotex 50mm thick insulation which should go in next weekend. But I still need to decide what to line the interior with and order it up. I am leaning towards the 3mm vinyl faced ply from Moreland, I have some samples which I have soaked in water and scratched and generally abused and it seems to be up to the job but I am open to suggestions if any one has any.
One thing about building on the driveway is the number of people that come in and ask about has surprised me even people that have been driving by have stopped for a look!


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