Isuzu npr 4wd

SkiFreak

Crazy Person
I'm looking at the drivers seat frame on the crew cab. I suppose longer mounting bolts, with a short weak die compression springs mounted using these bolts (67a - 67b) may allow the seat to absorb some hard bounce.
Unless you also include a shock absorber of some type it will be like riding on a pogo stick. Springs alone... very bad idea.
 

gator70

Active member
I read super singles have less rolling resistance than duel rear wheels
 

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SkiFreak

Crazy Person
Where can I buy Isuzu NPS parts online?
There are numerous online truck parts stores in Australia, but I have no idea of what's available in the US.
I have also seen quite a few parts being sold on eBay.

You should also know that many of the NPS parts will be the same as the NPR parts. Normally it's only the 4x4 specific parts that are different.
 

Ultimark

Active member
We have Stratos seats in our NPS, they are a single construction, no left or right side, just a damped sprung seat. They are manufactured in NSW as far as I know. Manufacturing time can be an issue as you need to order what you need some months before they will be made/turn up. Personal experience here.

The suspension part is on the rear in the lumbar region and consists of two springs and a damper. To preload the seat for your weight, one simply winds the wheel on the left side to put more tension on the springs.

Our seats were organised by ATW during the build, they still offer these seats but push a German made unsprung seat and in their current show truck, they have these German seats. I've sat in that truck whilst it was parked and jumped up and down, it was definitely better than the OEM seat, but when I sat in my Stratos seat later that day, I was glad for the sprung seat.

This is a Stratos seat overall picture.



Attached below is the rear of the drivers seat in our vehicle, you can clearly see the damper.

Mick.

Stratos_Shock_Absorber_IMG_20211203_125009.jpg
 
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Ultimark

Active member
The major stumbling block for changing to a suspension seat in an "N" series Isuzu cabin, is the available internal height restrictions. there just isn't enough room for deeper seats.

The F series, which is the next size up in Isuzu land are almost universally fitted out with Isringhausen seats, the best in the business. I would love to have an Isringhausen seat, but it isn't possible.

Mick.
 
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Peter_n_Margaret

Adventurer
We had an Iveco motorhome in Germany for 3 years. It had suspension seats. I hated them and adjusted them up until they were ridgid. No idea of the brand.
It is also essential that the seat belts are attached to the seat and not to the floor otherwise the belt gets loose-tight with each movement.
We don't have suspension seats in the OKA, but we do have decent vehicle suspension..... :)
Cheers,
Peter
OKA196 motorhome
 
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gator70

Active member
We are mounting a air compressor on the frame below the subframe. This is a 12v model. My question is; should the 12v electrical be controlled from the truck cab or close to the air compressor switched and fused by the frame location?

Opinions?
 

gator70

Active member
I would check measurements before buying
Thanks to all

Crew cabs can't use any of these seats. The mounting is very unique to crew cabs.

With both front seats access underneath is required.
 

Ultimark

Active member
We are mounting a air compressor on the frame below the subframe. This is a 12v model. My question is; should the 12v electrical be controlled from the truck cab or close to the air compressor switched and fused by the frame location?

Opinions?

You don't mention what the compressor is going to be used for, but if you are going to use it for tyre inflation, and most likely to inflate super single tyres, then I wouldn't even contemplate using a 12V compressor; unless it is an air conditioner type of compressor.

The amperage required, means the cabling required is virtually double that of a 24V compressor.

Our truck is running an ARB 24V twin compressor, as the truck is a 24V system, there is no real fiddling required; well not much anyway. Our compressor power switch is a genuine Isuzu accessory switch located in one of the spare Isuzu push switch holes alongside the drivers door.

Although not exactly about air compressors, this write up I did with regard to our Centralised Tyre Inflation System, does show our compressor components and drainage of the air tank using a cannabilised ARB 24V twin air compressor. It hasn't missed a beat and gets used every time the truck is driven, including today.




Originally I used our single 12V ARB compressor which had lived in our ute for around 14 years, but it took ages and got hot as anything. I then had a test with an ARB 12V twin compressor hooked up directly to one battery as a test, definitely better, but it was working quite hard. I then purchased the 24V twin ARB compressor kit and used it using the jumper leads directly attached to the twin batteries; it was definitely faster and wasn't getting anywhere near as hot as the twin 12V unit. That compressor was then permanently and internally mounted when we had the Centralised Tyre Inflation System fitted.

The best units from what I have personal;y seen, are air conditioning compressors, but availability in Australia was one thing, and the eye watering price was another obstacle.
 

Peter_n_Margaret

Adventurer
This is the compressor I use in the OKA. 12V 100% duty cycle.
It is connected to a small accumulator tank that provides some storage and allows it to continue to pump as you move from tyre to tyre. Max draw is 31.5A.
It is wired via a relay that and is switched from the driving position so the tank is full by the time you stop and get out of the vehicle.
It also provides air for the ARB diff lock, so can sometimes run for long periods and will maintain the tank at 120psi+.
It is totally adequate for 305/70R19.5 super singles.
It is fully rebuildable, but in almost 20 years has never needed attention beyond an air intake filter clean.
Cheers,
Peter
OKA196 motorhome
 
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