Fuel Tanks

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10 Feb 2014 07:34 #41 by dandjcr
dandjcr replied the topic: Fuel Tanks
Hank, yes the fuel tank breathers are interconnected and terminate on the side of the hydraulic tank under the engine cover (next to the axle/transmission breather).


David and Janet Ribbans - Oka 148
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10 Feb 2014 08:06 #42 by Peter and Sandra OKA 374
Peter and Sandra OKA 374 replied the topic: Fuel Tanks
374 only has one factory tank and it terminates at a little breather box high up on the side in the engine bay, there are two blocked off fittings for additional breathers though which I connected my second tank to when it was installed.

OKA 374 LT Van, converted to camper/motorhome,
400ah Lithiums, 1100w solar, diesel cooking heating and HWS,
Cummins 6BT, Allison 6 speed auto, Nissan transfer.
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10 Feb 2014 08:41 #43 by Hank Onthewater
Hank Onthewater replied the topic: Fuel Tanks
thank you Peter and David. Just the information I needed.
The new fillers I am installing have a vent/breather connection as well, and was wondering to connect the vent of the new tanks to this or use the existing vent system. But by the looks of it it easier to use the existing breather lines. And it is high enough.
Hmmm, if the water is coming over the engine it it time to change the OKA for a boat anyway.....

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11 Feb 2014 14:30 #44 by dandjcr
dandjcr replied the topic: Fuel Tanks

Hank Onthewater wrote: easier to use the existing breather lines. And it is high enough.


Hank, note the breather connection to the tanks is a non-return valve, so excess air pressure can escape but stuff (like very high water levels) can't drain or be sucked back into the tank. So your air drying filters can't work in the breather lines and a fuel outlet water separator would be required.

Axle/transmission breathers don't have a non-return function.

David and Janet Ribbans - Oka 148
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12 Feb 2014 08:27 #45 by Hank Onthewater
Hank Onthewater replied the topic: Fuel Tanks
Thanks David, indeed I noticed the non-return valve. Although I am still wondering how that works. Air needs to 'escape' when filling the tank, and when diesel/air expands slightly during a hot day. But if this valve allows that (one way) how does it allow air into the tank when fuel is used (when driving) or when fuel/air cools down ie at night time.

In my case, I removed the existing tank and the non-return valve was fitted on that, according to the drawing. My new tank does not have a non-return valve; well, I never planned for that. Hehe, another case of ignorance?

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12 Feb 2014 09:25 #46 by dandjcr
dandjcr replied the topic: Fuel Tanks
Hank as the air and fuel in the tank cools and contracts, either air will be sucked in via the fuel filler cap (most likely), or fuel will be sucked back in along the outlet pipes or, or the tank will compress (unlikely).

The diagram of the actual fuel tank shows a normal fitting, only the breather diagram show it as a non-return fitting, so maybe you don't have them anyway.

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25 May 2015 07:02 - 25 May 2015 07:25 #47 by Rick Whitworth
Rick Whitworth replied the topic: Fuel Tanks
Tank Question...

Have had new 160 litre aluminium square tank made for drivers side of #149.
same height and length as original but wider



i am modifying original support brackets today

Tank is 3mm
Should I put bash plate underneath?
If so what material and what guage?


problem is, plate would sit very close to bottom of the tank, separared only by support rubbers.
Gap will fill up with muck
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Last Edit: 25 May 2015 07:25 by Rick Whitworth.

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25 May 2015 07:09 - 25 May 2015 07:09 #48 by TH
TH replied the topic: Fuel Tanks
They are fancy, Rick.

Estimated capacity?

You need some NOS stickers and chrome hoses to match now :D

Cheers, Tony
Last Edit: 25 May 2015 07:09 by TH.

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25 May 2015 07:18 #49 by Rick Whitworth
Rick Whitworth replied the topic: Fuel Tanks
editted and reposted Tony
..accidently hit the go button bfore adding dimensions

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25 May 2015 07:26 - 25 May 2015 07:28 #50 by outyonda
outyonda replied the topic: Fuel Tanks
Teflon plastic
tough, slippery & won't rust
can be shaped with heat gun
can be welded

OKAs 091, 093, 094, 113, 346x6 & 405
Last Edit: 25 May 2015 07:28 by outyonda.
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26 May 2015 01:25 #51 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Fuel Tanks
Not Teflon....
High density polyethylene (HDPE).
Buy a sheet from your local plastics supplier or fabricator. Any thickness you want, but 4mm would be plenty.
Can be hot air welded or heat and bend. It is also possible to cold bend it if you have some mechanical 'help'.
All the mudguards (from top to bottom of the 'flaps') on #196 are HDPE and the rears are 10 years old. Bullet proof.

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214
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26 May 2015 09:17 #52 by Paul Scherek
Paul Scherek replied the topic: Fuel Tanks
Hi Rick,

Your tank looks brilliant. Do you mind me asking how much it cost?

Cheers,
Paul

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26 May 2015 10:38 #53 by Rick Whitworth
Rick Whitworth replied the topic: Fuel Tanks
Paul,
Tank was built exactly to my drawing by small long established local company Reid's Engineering who have a reputation for high quality esp with aluminium.

Cost depends on how much work they have.
..Don't know if they could charge the same second time round, mine was around the $900 mark.
This did not include cost of the cap and neck which I supplied (bought a matching lockable pair from Hiltons),along wirh the sender and fittings from my old tank.

Best thing is they build to your specs
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26 May 2015 14:38 #54 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Fuel Tanks
Does anyone know the regulations for fuel tanks?
I have made rears from roto-moulded HDPE plastic, but they are inside the chassis rails.
I am thinking about making some plastic ones to replace the OEM ones but they are outside the chassis rails and the rules may vary because of that?
Does anyone know?

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214

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26 May 2015 14:49 #55 by Paul Scherek
Paul Scherek replied the topic: Fuel Tanks
Thanks Rick, that's great, and I reckon excellent value for money. And it looks really good, so say nothing of the extra capacity.

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26 May 2015 15:37 #56 by Paul and Sue Crompton
Paul and Sue Crompton replied the topic: Fuel Tanks
Hi Peter and Margaret, don't know if you can put a plastic tank outside the chassis, however, as you know, Peter's new Iveco 4x4 that has been built by TravelTrucks, certainly has a plastic tank outside the chassis. One would assume that they would know the regulations but of course there is no guarantee. Below is a photo which I believe you would have seen and it would be in a similar position as the Oka. Paul.

The photo is from AMH website and the wording from the photo: "This photo shows the 160 L auxiliary fuel tank, the 40 L waste water tank low down, and the front-top of the water tank between the frame members. The centre "kinetic" suspension mounting is also visible, immediately to the rear of the fuel tank."



Paul Crompton - OKA 168
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26 May 2015 16:24 #57 by Paul Scherek
Paul Scherek replied the topic: Fuel Tanks

Paul and Sue Crompton wrote: The centre "kinetic" suspension mounting is also visible, immediately to the rear of the fuel tank."


I wonder what - if anything - 'Kinetic Suspension' means? Is it just rubbers as in the Oka, or is it really something special?

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26 May 2015 20:36 #58 by Joseph Baz
Joseph Baz replied the topic: Fuel Tanks
Great TIG welding job,nice and uniform
Cheers,Joe

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27 May 2015 02:42 #59 by Tony Lee
Tony Lee replied the topic: Fuel Tanks
We don't need to build weak points into our vehicles Paul since we can just mount our boxes essentially straight on the chassis. The hoipoloi have to come up with all sorts of ways to try and avoid rough roads tearing their vehicles and living quarters to bits.

Tony

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27 May 2015 03:25 #60 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Fuel Tanks
Thanks Paul, that Iveco is certainly a good indication that it is OK.

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214

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