Maintenance instructions
Locating blockage in Series-Flo systems
3-16 3HEA 800 970-001 Rev. D, Mars 2006
Maintenance
If all pistons are movable and there is no indication of a more serious problem:
Action
1. Replace end plugs and using a new gasket apply the correct torque. See torque
table below.
2. Re-test this divider valve using the manual pump. If a piston is jammed, or a hard
wax-like substance, or dirt is noted at the end of the piston chamber, proceed with
disassembly.
3. The divider valve can be dismantled by removing the tie rod nuts.
4. With the individual sections on the bench remove the end plug from both ends of the
section. Taking one section at a time remove the piston, if it appears to be jammed,
try removing it from the other direction.
With badly jammed pistons it may be necessary to use a brass rod and lightly tap
piston out.
5. Clean sections and pistons in a suitable clean solvent until all lubricant has been
removed.
6. Use compressed air to dry and blow out all ports thoroughly.
7. A small wire probe should be used to make sure all passages are clean and open.
8. Inspect the 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. Care must be taken to
install piston only into the intermediate section from which it was removed.
9. If divider valve section and piston both appear in good condition, reassemble
section making certain that piston slides smoothly but snugly in cylinder bore.
10. Repeat cleaning and inspection of each section.
11. After all sections have been cleaned, blown out, inspected and found to be in good
condition, reassemble the divider valve as indicated by the notes and sketches.
Use all new gaskets and correct torque ratings listed below.
Test operation of divider valve using a manual pump.
Assembly Torque (Ft. Lbs)
MJ M MV MVH MSP/
MH
MX MXP MG
Tie rod nuts 12 20 20 24 8 23 9 12
Indicator plugs 7 15 15 15 10 18 15 18
End plugs 1515151511353515
Valve section
mounting screw
913
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