NF, After 7 years, the seals in the white part of pump may be dried up. There is usually some kind of lubricant, (vaseline?) on the O-rings and seals to keep them supple. A pump rebuild kit is readily available to replace them, from any of the parts houses.
Don't forget to lube the star wheel behind the pump to make the action work easier.
Pump comes off of wiper motor housing with just a couple of screws. Then you can move the actuator by hand to see if you get vacuum.
69' SS-350 ragtop, M20, 3.55 posi. Totally Disassembled & in boxes (I'm working on it!)
69' Hugger Orange Z-21 ragtop 327/PG, Driver
[This message has been edited by KevinW (edited 01-22-2001).]