ABB IRBT 4003S Product Manual page 98

Maintenance instructions
Locating blockage in Series-Flo systems
If all pistons are movable and there is no indication of a more serious problem:
1. Replace end plugs and using a new gasket apply the correct torque. See torque
2. Re-test this divider valve using the manual pump. If a piston is jammed, or a hard
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
5. Clean sections and pistons in a suitable clean solvent until all lubricant has been
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
9. If divider valve section and piston both appear in good condition, reassemble
10. Repeat cleaning and inspection of each section.
11. After all sections have been cleaned, blown out, inspected and found to be in good
Use all new gaskets and correct torque ratings listed below.
Test operation of divider valve using a manual pump.
Tie rod nuts
Indicator plugs
End plugs
Valve section
mounting screw
3-16
Action
table below.
wax-like substance, or dirt is noted at the end of the piston chamber, proceed with
disassembly.
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.
removed.
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.
section making certain that piston slides smoothly but snugly in cylinder bore.
condition, reassemble the divider valve as indicated by the notes and sketches.
MJ
12
7
15
Assembly Torque (Ft. Lbs)
M MV MVH
20 20 24
15 15 15
15 15 15
3HEA 800 970-001 Rev. D, Mars 2006
MSP/ MX MXP MG
MH
8 23 9 12
10 18 15 18
11 35 35 15
9 13