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d. Clean the sections and pistons using a suitable
clean solvent until all the lubricant has been
removed.
e. Use compressed air to dry and blow out all
ports thoroughly.
f.
Use a small metal probe to ensure all the
passages are clean and open.
g. Inspect the cylinder bore and piston carefully for
scratches, score marks or other damage.
NOTE: If either the piston or cylinder bore is damaged,
install a new section. All pistons are selectively fitted to
the bore for proper clearance. Be sure to reinstall the
piston only into the valve section where it was removed.
h. If the divider valve section and piston both
appear in good condition, reassemble the
section making sure the piston slides smoothly
but snugly in the cylinder bore.
i.
Repeat the cleaning and inspection of each
section.
After all sections have been cleaned, blown out,
inspected and found to be in good condition, reassem-
ble the divider valve.
NOTE:
•
Always use new gaskets.
•
Test the operation of divider valves using a manual
pump.
Contamination Blockage
If dirt, foreign material, or any other form of
contamination is found in a divider valve, cleaning that
divider valve only temporarily solves contamination
blockage problems. The source of the contamination
must be discovered for satisfactory results.
Investigate the system filtering method. Inspect and
clean, if necessary, the filter elements.
Review the reservoir filling method to remove the
possibility of foreign material entering the reservoir
during filling.
312497ZAB
Separation Blockage
If a hard wax or soap-like material is found in the Valve
Section, grease separation is occurring. This means the
oil is being squeezed from the grease at normal system
operating pressure and the grease thickener is being
deposited in the divider valve. Cleaning the divider valve
only temporarily solves the problem. Consult your
lubricant supplier for recommendations on alternate
lubricants and your local Graco/Trabon distributor to
verify compatibility with centralized lubricating systems.
NOTE: If all indicator port plugs are removed, the master
will not cycle. Blockage is in this divider valve (F
Repair
. 12).
IG
17
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