Other information:
Removal
Remove the windshield wiper pivot arms.
Refer to: Windshield Wiper Pivot Arm (501-16 Wipers and Washers, Removal and Installation).
On both sides.
Remove the pin-type retainer.
Detach the windshield washer hose coupling and the retainer...
Inspection
NOTE:
Do not use a caustic cleaning solution or a wire brush to clean the pistons or damage can occur.
Clean and inspect the (1) ring lands, (2) pin bosses,
(3) skirts and the (4) tops of the pistons. If wear marks, scores or
glazing is found on the piston skirt, check for a bent or twisted
connecting rod...