MICROMATIC ROTAC SB-18, Руководство по ремонту

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RM – 26-10-7707 Rev. E Page 34 of 39
g) TROUBLESHOOTING
TROUBLE POSSIBLE CAUSES REMEDIES
External
Leak
at Shaft
 Damaged Shaft Seal
shaft Seal installed
incorrectly.  Replace shaft seals
 Contamination in seal area.

Disassemble, clean all debris and rust from
shaft, shaft seal groove area, repair/polish as
necessary, install new seals.
 Check fluid filtration and contamination level.
 Shaft - scratched, scored,
worn or damaged from
corrosion.
 Repair shaft, if possible, by lightly polishing in
a radial fashion, recommend replace.
 If there is any doubt about quality of the shaft
surface where the seals are the shaft should
be replaced.
 GEN2 Actuators - install the inner most shaft
seal in the unused middle grove.
 Internal damage. Scored or
galled metal surfaces
contaminate hydraulic fluid
with small metal pieces.
 Replace all scored and excessively damaged
pieces. Clean thoroughly, install new shaft
seals.
External
Leakage
at Joint
Between
Head and
Body

Pinched head seal (between
head and body)

Can be pinched at
assembly.
 Remove head from body, inspect O-ring to
determine if it has been pinched.
 Replace O-ring seal if damaged.
 If O-ring seal shows signs of extrusion,
inspect CPR cartridge.
 Extruded head seal
(between head and body)
 Defective CPR cartridge
allows excessive Pressure
spikes leading to seal
extrusion.
 Inspect and Test CPR cartridge, recommend
replacing cartridge.
External
Leak –
Manifold

Not tightened down fully
 Torque all bolts per specifications (see
Torque Chart in this manual)
 Verify (2) O-rings not extruded.
 Manifold interfering with
radius on heads preventing
manifold from seating fully
on manifold mounting face.
 Verify manifold is not interfering with the
radius of either of the heads by slipping a
piece of paper between the two parts – it
should pass freely from top to bottom. If
there is interference, remove manifold and
remove limited material from the radius of the
head to eliminate interference.
 Check that (2) O-rings have not extruded and
torque all mounting bolts per specifications
(see Torque Chart in this manual).
 Damaged O-rings between
manifold and body
 Remove manifold, inspect O-rings and
sealing surfaces on both the manifold and
mounting face and O-ring pockets on the
body for damage.
External
Leak
at bolts or
dowels
 Cracked casting from
overloading in use or over
torquing of bolts  Replace defective parts.

Porosity in casting

Replace defective parts.