[dai]

It started fine when I switched it on this morning, then just stopped. I checked out all the usual probs, but had no luck.
The problem is with the pump, I already checked out the PCB.
I wired the pump up direct, bypassing the PCB and it wouldn't start, checked it out with the meter and the pump was getting 13.7 volts. I then removed the black plastic cover that fits over the soldered pump connections, there are slots that enable you to turn the pump a little with a small screwdriver, as soon as I moved it the pump started up again, it will continue running until I stop it, but it won't start up again unless I turn it again with a screwdriver.
Is there any way I can dismantle the pump to check for an obstruction? I tried forcing water into the outlet but that won't work either, there must be a one way valve.
Has anyone changed the pump on the backpack? How did you remove those clips off the hoses?and did you use jubilee clips as replacements?
Where can I get a new pump?

Sorry for all the questions guys. I really don't think that the backpack is up for the job, I already changed one PCB and I only use the thing on about 7 days out of a month.
Any suggestions appreciated. Dai

[jeff1]

That sounds like a problem with the brushes in the motor dai, if you can get the pump out and strip the end off, there should be 2 brushes, clean them with a bit of emery paper and retry.

Your BP fairly new isn't it?

[windowwashers]

It started fine when I switched it on this morning, then just stopped. I checked out all the usual probs, but had no luck.
The problem is with the pump, I already checked out the PCB.
I wired the pump up direct, bypassing the PCB and it wouldn't start, checked it out with the meter and the pump was getting 13.7 volts. I then removed the black plastic cover that fits over the soldered pump connections, there are slots that enable you to turn the pump a little with a small screwdriver, as soon as I moved it the pump started up again, it will continue running until I stop it, but it won't start up again unless I turn it again with a screwdriver.
Is there any way I can dismantle the pump to check for an obstruction? I tried forcing water into the outlet but that won't work either, there must be a one way valve.
Has anyone changed the pump on the backpack? How did you remove those clips off the hoses?and did you use jubilee clips as replacements?
Where can I get a new pump?

Sorry for all the questions guys. I really don't think that the backpack is up for the job, I already changed one PCB and I only use the thing on about 7 days out of a month.
Any suggestions appreciated. Dai

What Backpack is it Dai  ?

[tacky]

buy one from wcw £80plus vat .untill u sort out problem on shurflo .bp .ur problems ar xcectly the same as i had .i did the same as u to rectify the problem ( good advice off jeff 1 ) but mine is working now .thanks jeff .i olso listened to a bit of advice tosh give . dont leave it in damp place over night .eg car or garage . i keep mine in house .. olso the wcw backpack is a nice bit of kit .

[jeff1]

Are the WCW backpack pcb's covered in a resin compound?? If they are then leaving them in damp areas shouldn't cause a problem as the resin is waterproof, they have to be incase anything is spilled during a refill.

When my surflo was new I had this stop starting problem and I still get it sometimes now, turns out to be the battery plugs are a little temperamental, disconnect and reconnect with a twist and it goes again.

This isn't dia's problem as he has voltage at the pump, but something for new comers to the BP to be aware of.

[dai]

My Surflow is about 18 months old now. I did fill it this morning before putting the battery back in.
I think that the filling is the devil where backpacks are concerned.
Jeff, Are the brushes on the left hand side, behind those 3 long screws?

[jeff1]

My Surflow is about 18 months old now. I did fill it this morning before putting the battery back in.
I think that the filling is the devil where backpacks are concerned.
Jeff, Are the brushes on the left hand side, behind those 3 long screws?

The brushes are inside the pump, there the things that the 2 cables are connected to inside the pump itself, I've not had mine apart but will check it out tomorrow for you dai

[dai]

I removed the motor, it is not a serviceable unit, you can't get at the brushes.
I have been on to Williams pumps Tel 08452263638 [so very helpful as always] They have a replacement motor and pump for the backpack, this replacement is a better quality pump, with ball bearings instead of the sleeve type fitted by Shurflo, it's also about £10 cheaper.
About £50, that's a lot cheaper than a new backpack. Ordered another Varistream too.
I always seem to spend a hell of a lot of money when I am rained, off and not earning any.

[Rob.Hall]

Hope you get it fixed soon Dia