Extended Trays Dual or Tandem

Quote:

---

Originally Posted by Lionelgee

Hello All,

Thank you for the reply - best look away if you are expecting a Land Rover...

Accessed February 13, 2017 from HQ 2 TON UTE, V8 T BAR AUTO HJ HX STATESMAN CAPRICE FRONT AND INTERIOR

One like this Holden rated as a 2 ton instead of a 1 tonner. There was a Japanese tray back ute version driving around Bundaberg not long ago.

Front axle and two axles at the rear. Only one of the rear axles drive. Six tyres on the road

Could they have achieved the same increase in capacity by just having a single axle at the back but with dual wheels? As in two wheels at the front and a single axle at the back with 4 wheels. There is a Toyota Land Cruiser example designed to registered for the road Accessed February 13, 2017 from,Utilities and Off-Road Vehicles

Okay found a Land Rover version Accessed February 13, 2017 from Weird dual wheel Land Rover - Page 2

What are the engineering advantages of either going dual or tandem?

Kind Regards
Lionel

---

Lazy axles, as they are called on trucks are next to useless, the problem is if the lazy axle is in front of the drive axle and you have to drive over an obstacle like a kerb or steep angled (from road to driveway) the lazy axle will lift the drive axle out of contact with the road and the same thing happens with the lazy axle at the rear when backing up. Forget trying to get anywhere off road, some trucks have the ability to lift the lazy axle when unloaded or driving or backing into a rough site, Regards Frank.

Everyone has missed the other advantage of the extra axle - as well as increasing the load capacity, it enables a longer tray, so you've got more space.

John

Quote:

---

Originally Posted by Tank

Lazy axles, as they are called on trucks are next to useless, the problem is if the lazy axle is in front of the drive axle and you have to drive over an obstacle like a kerb or steep angled (from road to driveway) the lazy axle will lift the drive axle out of contact with the road and the same thing happens with the lazy axle at the rear when backing up. Forget trying to get anywhere off road, some trucks have the ability to lift the lazy axle when unloaded or driving or backing into a rough site, Regards Frank.

---

This happened to my BIL with his HZ 6 wheeler going out his driveway. He hesitated to let a car go past and this put the lazy on the crest of his driveway and took the weight off the drive axle. We had to push it a forward about a foot to get drive traction back. Being a Blue/Green Oval man, I never let him forget it either :D

Hello All,

It just doesn't happen to lazy axle vehicles. I have a four wheel drive tractor that can lose traction diagonally while I am mowing along a grass embankment. The road embankment has a sloping drop between the road down to the spoon drain. The edge of the embankment starts with a rounded face where it starts off from a series of under the road box culverts.

If I approach at the incorrect angle I find myself having the front right wheel on the embankment. The front left wheel is in the air spinning around, The rear left wheel is on the ground, and the right rear is in the air spinning around - just before the embankment starts. All forward progress ceases. Being focussed on the distance to mow to a sight line the brain goes - "hmmm I don't seem to be moving forward".

A quick glance at the wheels reveals what is happening and I select reverse. After a decent run up I use a different angle of approach and get the slashing finished. Then three days after I have finished the job the council usually come along - for the first time in ages - and they slash the road sides, missing my place as it has already been done.

Kind Regards
Lionel

Quote:

---

Originally Posted by Lionelgee

Hello All,

It just doesn't happen to lazy axle vehicles. I have a four wheel drive tractor that can lose traction diagonally while I am mowing along a grass embankment. The road embankment has a sloping drop between the road down to the spoon drain. The edge of the embankment starts with a rounded face where it starts off from a series of under the road box culverts.

If I approach at the incorrect angle I find myself having the front right wheel on the embankment. The front left wheel is in the air spinning around, The rear left wheel is on the ground, and the right rear is in the air spinning around - just before the embankment starts. All forward progress ceases. Being focussed on the distance to mow to a sight line the brain goes - "hmmm I don't seem to be moving forward".

A quick glance at the wheels reveals what is happening and I select reverse. After a decent run up I use a different angle of approach and get the slashing finished. Then three days after I have finished the job the council usually come along - for the first time in ages - and they slash the road sides, missing my place as it has already been done.

Kind Regards
Lionel

---

Can't you engage rear diff lock in such situations? That's what I do.
Don.

That might be ok for the tractor, but most of the 6 wheeled conversions with lazy axles I have seen, unfortunately don't have a rear diff lock.

I'm pretty sure:

With a single axle/dual tyres you only end up with 150% load capacity

Dual axle and you can end up with 200% load capacity.

https://www.youtube.com/watch?v=yovp0YGRNb8

Quote:

---

Originally Posted by Don 130

Can't you engage rear diff lock in such situations? That's what I do.
Don.

---

Hello Don,

Thanks for the reply. Yes I do ... when I remember I have one! :angel:

Kind Regards
Lionel

Quote:

---

Originally Posted by Slunnie

I'm pretty sure:

With a single axle/dual tyres you only end up with 150% load capacity

Dual axle and you can end up with 200% load capacity.

---

Hello Slunnie,

That is the information I was after - it comes down to load capacity. Thanks for confirming the benefits between the two options.

Kind Regards
Lionel