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16 312497P
d. Clean sections and pistons in suitable clean sol-
vent until all lubricant has been removed.
e. Use compressed air to dry and blow out all ports
thoroughly.
A small metal probe should be used to make
sure all passages are clean and open.
Inspect cylinder bore and piston carefully for
scratches, score marks or other damage.
NOTE: If either piston or cylinder bore is damaged, a
new section must be installed. All pistons are selectively
fitted to the bore for proper clearance. Be sure to rein-
stall piston only into the valve section from which it was
removed.
f. If divider valve section and piston both appear
in good condition, reassemble section making
certain piston slides smoothly but snugly in cyl-
inder bore.
g. Repeat cleaning and inspection of each section.
After all sections have been cleaned, blown out,
inspected and found to be in good condition,
reassemble divider valve using notes and
sketches (Step 7) as a reference.
NOTE:
• Always use new gaskets.
• Test operation of divider valve using manual pump.
Contamination Blockage
If dirt, foreign material or any other form of contamina-
tion is found in a divider valve, cleaning that divider
valve will only temporarily solve contamination blockage
problems. The source of the contamination must be
eliminated for satisfactory service.
The system filtering method must be investigated, filter
elements should be inspected and cleaned if necessary.
The reservoir filling method should be reviewed to elimi-
nate any chance of foreign material entering the reser-
voir during filling.
Separation Blockage
If a hard wax or soap-like material is found in the Valve
Section, grease separation is occurring. This means that
the oil is being squeezed from the grease at normal sys-
tem operating pressure and the grease thickener is
being deposited in the divider valve. Cleaning the
divider valve will only temporarily solve the problem.
Consult your lubricant supplier for recommendations on
alternate lubricants and your local Graco/Trabon distrib-
utor to verify compatibility with centralized lubricating
systems.
If all indictor port plugs are removed, master will not
cycle. Blockage is in this divider valve.(F
IG. 12).