[Mike 108]

In an earlier 'thread' AJM wrote:

"I already have a motor speed control flow controller Peter, its an old style one with none of the fancy digital controls to go wrong.
The pressure switch I referred to is on top of the Shurflo pump and I probably go through about 1 every 8 to 12 months.
They are only about £1.50 from Maplins and I can change one in about 10 mins so not really a problem Peter."

Can anyone please give me a part number for the pressure switch from Maplins?

Also, how does it fit to the top of the Shurflo pump - is it identical? Do you have to seperate the 'pressure pad' from the switch (if you know what I mean)

Thanks.

Mike

[andyM]

Hi Mike you need a Low Cost Standard Microswitch part no. GW71N from Maplin's.
These switches have slightly wider spades than the original Shurflo one so you will need to buy new spade connectors to accomodate this.
Very easy to fit, on top of the Shurflo pump you will see 2 wires connected to the original Shurflo switch.
Disconnect the wires by pulling them off, make sure you remember where they go for when you have to put them back!
The pressure switch is in the plastic housing on top of the pump, so unscrew 3 screws on top and release it from the pump.
Then use a small flat screwdriver and prise the 2 halves of the plastic housing apart, you should then see the switch. I then used the flat screwdriver again to lever the old switch out of the housing. Pop the new microswitch in and put it back together again.

You will notice that the Maplin microswitch has 3 spades, you only need to connect your wires to the top and bottom ones and just ignore the middle one its not needed. 

[Topclean]

I had the same problem, someone on here advised, they are called micro switches the one with out the lever arm are the ones you want.

if you open up the switch on top of the pump, you simply remove the old micro switch and replace.

Hope this helps.

[Mike 108]

Thanks very much, lads.

Mike