Unplug the hose that goes to the squirt nozzle, unplug the two wires from the motor, and take the bag out.
If the hoses are hard to remove from the bag, get a heat gun, or a hair dryer and heat the ends on the hoses up first, and then gently remove them.
Take the three clips off the bottom of the bag, and pull the motor/pump assembly out of the bag.
Get a small Phillips screwdriver(#0 size), and remove the three screws holding the pump together.
Carefully remove the bottom of the pump.
Try to turn the impeller.
If the impeller turns, good.
Get some soapy water, and a detail brush, and scrub out the pump cavity.
Hook the motor up to 12 volt battery, and see if it runs.
Do not let it run long without water.
 Put the back plate back on the pump.
 Make sure the O-ring gasket in all the way in, and not pinched out anywhere.
When starting the screws, turn them backward until you feel them drop in the screw hole a little, and then turn then forward.
This lets the screws find the old threads, and follow them in.
Tighten the three screws gently.
Hook the pump up to the battery, and see if it still turns.
Do not let it run long without water.
Put the pump back in the bag, and install the clips that hold the pump back on the bag. Put the small hose back on, it plugs into the "in" side of the pump, marked on the bag.
You should heat the ends of the hose up to make then nice and soft when you push them back on the bag, and pump.
Put a piece of hose on the "out" port of the pump, and fill the bag partially with water. Hook the pump up to 12 volts, and let it run, just take the other end of the hose from the "out" port, and run it back into the filler hole on the bag.
If the pump is pumping water, you can let it run for a little bit.
Put everything back together, and do not forget to put an cold weather solution of washer fluid in the bag.
Water only will freeze, and might hurt the pump.


This was posted and I had to share it with everyone here as well1
credit goes to DanielC of Ratsun.net for this gret how-to...

Hey, I am on here too!
Thanks for the kudos!

Thanks for the writeup!
it's this type of info that can't be overshared as someone will find it handy sooner or later...
Glad to see your here as well...
L8r