Disconnect the Pump power

Power off the system at the tractor cab.

Remove the Pump Junction Box Cover

Remove the Pump

Undo the 2x power wires to the pump inside the Pump Junction Box.

(take note of the polarity as this determines the motor rotation and reverse wiring could cause the fuse to blow upon restarting)

Undo the M5 mounting bolts to allow the pump to be removed from the Applicator enclosure

Remove the Rear Cover from the Motor

Use a PH2 Driver to undo the screws

Carefully cut through the metallic silver pump model sticker to allw the rear motor cover to be removed.

Pull it off vertically as it jams on to the brush holders.

Remove the Brushes from the Motor

Carefully pull back the brushes using the 3.5mm flat blade driver hooking the braided copper line.

Gently lift up the brush holder endways from the motor, making sure it is held when the spring comes free! (so the spring doesnt fly away)

Deburr the Brush Holders

Use a sharp razor blade to scrap the internal front edge of the plastic brush holders.

Run the blade around both directions to ensure there are no dags or sharp edges for the brush to snag or jam on.

Check the Brush Terminal screws

Ensure the brush wire lugs are done up snug but DO NOT OVER TIGHTEN.

Use pump pliers to prevent them from rotating and intruding over the brush holder guides.

Back off the screw and rotate around if necessary.

Re-install the Brushes

Firstly, take care to ensure the brushes slide in the holders freely before fitting them.

Hold everything together and move it downwards until the holder clips in and the brush slides forward into the armature.

Reassemble rear Motor Cover

Use the PH2 hand driver to reasemble the cover on to the pump.

Do not overtighten.