HINO 616 AUTO WIDE CAB 2007

Have you considered talking to someone like the airbag man

http://www.airbagman.com.au/

They might be able to add air springs to you existing softened leaf spring pack so that when you hitch the 5 wheel up it will support the additional weight but still give a acceptable ride when empty

By the way did you once have a Patrol & a Jayco van

Regards Don

Unfortunately you have chosen a light truck that will have limited options for improving the ride. Simply as you are sitting directly above the front axle you will feel the full impact of any bump. As the cab is quite compact it's unlikely you will be able to fit an air ride seat which is normally the best option to improve comfort for a cabover truck. At my work in the past they have had springs reset to allow more room to the bumpstop & fitted better shocks but no longer buy these smaller sized trucks if they are to be used on country roads. Have moved to the 500 series Isuzu with the taller cab which has the air ride seat option.
If your truck is lightly loaded all the time (well below the 4.5K capacity) possibly lighter springs may help but in your case when towing it sounds like you need more leaves. No doubt an air suspension system would be your best option to maintain a comfortable ride at any load but would be very expensive.
Companies like the 'Truck Whisperer' have had limited success in improving the ride & handling of our light trucks but again they will be another one happy to take your money with little gaurentee.
Cheers Craig.........

DONK,
THANKS FOR THE TIME,I KNOW BRETT THE AIRBAG MAN.YES YOU ARE 100% SPOT ON ABOUT MY NISSAN PATROL/JAYCO.MY PATROL HAD TWIN DRAW SYSTEM,HEAVY DUTY SPRINGS/POLY AIRBAGS AND I LOVED THAT UNIT ,I NEED A GOOD CLOUT SELLING THAT RIG AS IT WAS THE BEST EVER AND I MISS IT SO MUCH ,BUT THAT'S LIFE,WHO WAS THE FOOL THAT SAID LIFE WAS BETTER AFTER 40 , THAT WAS SOME TIME AGO.I AM MAKING DUMB MISTAKES TRUSTING PEOPLE. I TRUSTED THE SPINAL SURGEON HA ,WHAT A JOKE THAT WAS ,CHEERS MATE,PS DO WE KNOW EACH OTHER ??

DONK,
DID I REPLY CORRECTLY BEFORE ? WE MUST KNOW EACH OTHER ?

WRVA

Just in case you are new to Internet Forums...........................

It is not the done thing to type in UPPER CASE. It is constituted as Shouting. That aside, it is quite difficult to read.

Sorry cannot help you with your spring problem suffice to say that you may look at some type of Air Suspension?


Cheers

Stephen
What is the wheelbase of the Hino and what is the overhang.
It appears that the trailer needs to come forward to place moreload on the front axle.
If the overhang restricts you from doing this then people may shy away from the job.
4500K carrying is to be shared on both axles not all on the back axle.
What is the location of your hitch in relation to the back axle.
Ian

I had the same problem with my canter. Took the 8 leaf spring out and replaced it with a thinner 10 leaf spring and extended the springs by 120mm either end. works perfect now. i only did the front. Cheers Tony

Is that you Member - Stephen H (NSW)?

Gidday
I just looked at the photo of your rig. My experience with semi's is that the fifth wheel is always placed slightly in front of center over the rear axle. It appears from the photo that it is behind the axle.
I would guess that it is acting like a lever and causing the front to lift rather than have positive weight over the front axle.
I have over time driven a lot of Cabovers and found them to be very comfortable.