The Dispatch | Expert | Scudo Hub

OK,
I found an owners handbook in all the paperwork I got with the van yesterday and
it says the fuel tank capacity is "Approximately 80 liters"
so 85L from bone dry to full sounds about right.

Perhaps try the MK2 section?

All this talk of rims and side walls is not irrelevant but does somemwhat
overcomplicate the issue.
Tyres are not all round, they distort (flatten) slightly at the bottom.

I made an Arduino based speedo for a motorbike and found it was simpler and more accurate to ignore rim/tyre sizes and just measure the distance between the wheel centre and ground to get a more realistic running radius.
From this you can calculate the running diameter and circumference.

The wheel sensor gave one pulse per revolution so in my case it was easy to calculate
Distance: number of pulses
Speed: number of pulses in a given time interval.

I dont know how many pulses the Dispatch/Expert/Scudo gearbox pulsers send but
reckon its more than one which should make it more accurate.
If I really wanted to know, I'd probably jack up a wheel and measure them as I turned the wheel one revolution.
You can pick the signal up from the back of the speedo or in my case also from the ECU
or from the wiring harness at any accessible point

83 is 17% less then 100

Look on the bottom and you should see numbers next to the terminals
30/85/86/87 for instance
This will tell you what sort of relay it is.
4 pin is usually a make/break type, 5 pin usually a changeover with  NO and NC terminals
The power rating you choose be above expected load

It seem an awful expenditure of time and money renting a ramp
in Cheltenham.
If its the Alstone lane place, that's 40 miles from me in Fishponds
so 2 hours of driving and 2 gallons of deisel plus ramp rental
I'd just get my guy around the corner to do it and it would cost
me £40 for an hours labour.

FYI
this place sells a new shaft for 65 PLN or £12.76

http://iveco-ducato.com/make.asp?t=5&br … NIK%C3%93W

Quote:
"I'm thinking it's not the clocks that are at fault. This is because at the same time as the speedo, odometer and trip stopped working, I started getting slight rough running/hesitancy in lower gears at lower speeds. Also I think my MPG dropped. This leads me to think that the ECU isn't getting the correct info to run engine properly."

That sounds quite plausible to me, why else take a feed off the speedo cable?
I'll try and find out what pin/cable colour  is use on the engine management unit as  that would probably be easier to access

did you swap over sender units?

One quick test that comes to mind if the speedo packed in
would be to whip the clocks out
( I'm surprised how easily mine came out)
and monitor pin 9
I often use an led with a 1K series resistor to check for 12v or low voltages
I can patch it between a connector/pin and ground then drive/ride with both hands
free whilst just a glance at the led tells me if a circuit is working or not.
I've used it to check things like if a thermo rad switch was activating on a bike
or not

If the led goes on/off the problem is in the clocks
if the led doesn't flash the problem is in the wiring or sender
It seems better/quicker way to get to a fault than grovelling around under the van if you dont have to

It's worth checking you are getting power to the sender just in case
The 3 pin plug should have 12v at pin 1 and ground at pin 2
with signal out at pin 3
It will hard to check for signal out with out actually driving but ignition on
should show power at the plug.

My Peugeot wiring diagram shows it gets power from Fuse 4 in the passenger fuse box
I know they're all essentially the same but there are variations
I used the DW10 diagram

Petrol? compressed air ? 
Way too risky for me that is
I understand petrol will dilute oil but there are safer options.
I didn't notice any oil anyway just years of slowly accumulated crud and crap
in the rusty looking soup

The heater seems to be working well at the moment but I have no criteria tell me
what to compare it to.
If I think it could be improved and with the coupler in place, I can easily use the same method again in the autumn

If your current sender doesn't have a square drive how does the gearbox drive the
pulser at the top of the sender?

Is it possible yours has broken off?
perhaps it broke off and dropped down into shaft (no1) in the drawing
and you didn't notice this due to age, oil, muck etc