April 26, 2007

Failure to follow the proper shut down procedure of the 1:1 Transfer Pump will cause build up of solids on the isocyanate (ISO) pump shaft and in the fluid wet cup area. This will cause undue wear of the pump packing, seepage of ISO, and the pump to not cycle properly.

To prevent this follow these simple rules:

A) At the end of the day, cycle the pump to the top of the stroke and clean the pump shaft of all the ISO with ISO solvent on a rag. Be sure to clean the wet cup area of any solids.

B) Grease the pump with Graco’s ISO Grease. Refill the wet cup with Graco’s ISO pump lube, then cycle the pump to the bottom of the stroke. This is called parking the pump. A maintained and lubrication pump should not give you problems.

C) Check to insure that the packing ring is tight to keep the amount of ISO seepage to a minimum. It should be tight enough to prevent leakage, but no tighter.

D) Always keep pump shaft free of solids. These solids cut the packing as they are forced through, causing undue wear and seepage of ISO.