The Dispatch | Expert | Scudo Hub

The signal out from the pulser goes to both the speedo and the engine management box

Here's some pics I've been extracting/converting and partially annotating  from that sedre thing
note the engine type but 1620 is the sender unit in all

The part number of 9600936680 gives the pic below and the green plastic bit at the tip suggests a square drive
socket perhaps?
a bit like motorcycle speedo drive
(this makes my keyway theory pretty much bollox )
but there must be some mechanical means to drive a rotor past a sensor to create pulses

Going back in sounds frustrating but what else can you do?
take lotsa pics
£156 for new one? sod that, I'd test the sender on the bench and have it apart and I bet
there's a 3 pin 50p hall effect IC in there with maybe a couple of resistors

Hmm ok,
I see 3 wires to the pulser so assuming pos, neg and signal
it probably is something like a hall effect or reluctor type affair

This still brings up the question how the pulser sitting  on top of the device is driven
the one you have pictured has keyways so this suggests its designed to mate to a keyed shaft ( No1)

I understand it's sod to get to and with it probably being grubby and oily too
it would be easy to overlook the inner profile the new pulser has to mate to.
Relying on friction to drive it would be a very poor form.

Edit:

Maybe its my monitor but just looked to your first image more closely and
details looked washed out to me so darkened it in photoshop
I now see it does have keyways too, so maybe the square drive is not how it's driven
and were a distracting feature

Its more than likely remnants of an aftermarket install.
Best and easiest solution is to buy new as per Caspers advice and link

OK, thanks
I've been looking at the rear doors today and saw the NS wasn't catching at the top and
this may have contributed to noise at motorway speeds and the odd rattle I get.
I'll monitor this and devise something more substantial if I have to.

I'm seriously considering sealing up the OS door for various reasons how did you do yours?

In order to cut down wind noise and streamline the van
for more exciting performance I have added some stick on deflectors
to the door edges.
The results are amazing!, the pounds have fallen off and I now have
a full head of hair and (at long last) attractive to the ladies.

You too can have a body like mine, just send me a ten shilling postal order
for my secret to success.

Well after rinsing the bubbly stuff out, the flow from the drill powered pump
didn't look that good so got the hose out and flusheD it one way then another.
This seemed to dislodge a load of brown crap which was encouraging
and as the water cleared there were still gritty looking particles in it
so I kept going until I saw no more particles.
Result? time will tell but I have system now if I have to do it again

I'm currently running the motor to warm it up, check for leaks and and burping it.
the temp gauge is currently at 65 and the heater has been putting out hot air
consistently for 10-15 minutes with no discernable drop in temp
so that's very definite improvement!

Mine doesn't have a service light per se so I probably gave a misleading description

When the ignition is turned on, the odo displays a spanner and number for
a few second before displaying the actual mileage
I think mine was around 1300 IIRC
This will eventually count down from the current 20000 I have reset it to.

I'll look into doing a gearbox oil change soon
2L of 75w-90 and some moly eh?
good to know, noted.

As I said above, personally  I'd probably Kwik or JB  weld it in and be done with it
Kwikweld is as strong as JBweld but sets faster and has the same chemical resistance but
only likes temps up to 120C compared to 220C ish for JB weld.
I've always got some about and among other jobs, have used it to fix a few radiator fan switches to bike radiators and it stayed on there for years
Most engines don't go much above 80-90C unless there a problem

Yeah go on, rub it in.
You with yer two vans, sunshine and all
us soft southern barstewards are freezin our nuts off right now
what happened to summer?

I've pulled half the dash apart atm but later will look on the sedre thing and see if it lists that O ring
but measuring the outer diameter of the elbow and inner diameter of the pump hole will give an idea of what size
to use ( with lashings of loctite or similar semi setting sealant of course)

Mind you, I must admit if it were mine, I'd be sorely tempted to just clean it, de grease it and get some Kwik-weld/JB weld in there and be done with it if its unlikely to be needed to be removed again.
Changing the that hose clip with a jubilee clip would allow for future pump or hose removal.

Edit:
I Looked on the Expert and Scudo parts files and the pump come up as a complete unit on both
No sign of the elbow being seperate or having an O ring

I have 'Peugeot' PU-2294A here that came with the van which looks identical
and has a 4 digit number written in sharpie on the top, presumably the code ?.
Didnt bother to test it.
It was tucked behind the drivers seat as it had a Pioneer stereo in there when bought
and can only assume it was being kept to be reinstalled when the van was sold.