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375 SE
800-00162
2. Cartridge Disassembly
-
Remove the o-ring, back-up ring, and square sealing ring from the outlet support plate.
-
Scribe a line across the outer surface of the cartridge kit. The scribe marking will provide a reference
for parts during assembly.
-
Place the cartridge on a flat surface (outlet support plate down) and remove the two socket head screws.
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
Do not slide flex side plates across the ring and
Do not slide flex side plates across the ring and
Do not slide flex side plates across the ring and
Do not slide flex side plates across the ring and
Do not slide flex side plates across the ring and
rotor. Burrs on the ring or rotor can cause deep
rotor. Burrs on the ring or rotor can cause deep
rotor. Burrs on the ring or rotor can cause deep
rotor. Burrs on the ring or rotor can cause deep
rotor. Burrs on the ring or rotor can cause deep
scratches in the soft brass surface.
scratches in the soft brass surface.
scratches in the soft brass surface.
scratches in the soft brass surface.
scratches in the soft brass surface.
-
Slide the inlet support plate and seal packs off the cartridge. DO NOT allow the flex side plate to slide
with the support plate.
-
Move the flex side plate off center just enough to grab the edge and lift up and away without sliding.
If a small flat piece of wood is available, place it over the ring and rotor and reverse the cartridge to have
the outlet support plate pointing up.
-
Slide the outlet support plate and seal packs off the cartridge. Do not allow the flex side plate to slide
with the support plate.
-
Move the flex side plate off center just enough to lift up and away without sliding.
-
Remove the cam ring from the rotor and vanes.
-
Locate the arrow stamped into the rotor periphery.
-
Remove the vanes and inserts in order, starting at the arrow. Keep them in order for inspection.
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: Do not remove cartridge locating pins from the inlet support plate unless they are damaged. The pins are
of a driv-loc type and can be difficult to remove.
C. INSPECTION AND REPAIR
C. INSPECTION AND REPAIR
C. INSPECTION AND REPAIR
C. INSPECTION AND REPAIR
C. INSPECTION AND REPAIR
CLEANING
All parts must be thoroughly cleaned and kept clean during inspection and assembly. The close tolerance of the
parts makes this requirement very important. Clean all removed parts, using a commercial solvent that is compatible
with the system fluid. Compressed air may be used in cleaning, but it must be filtered to remove water and
contamination.
1. Discard the shaft seal(s), o-rings, back-up rings, and seal packs. Use a new seal kit for reassembly. Refer
to parts drawings noted in Parts Manual for kit numbers. Wash the metal parts, blow them dry with air and
place on a clean surface for inspection.
2. Check the cartridge wear surfaces for pickup, scoring, and excessive wear. Slight heat discoloration of the
flex side plate bronze surface is normal. Score marks deeper than .001 inch and scratches deeper than .002
inch indicate a new part is needed. Slight scoring and/or scratches can be removed with an oiled arkansas
stone.
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
DO NOT use a dry stone on the bronze surface or
DO NOT use a dry stone on the bronze surface or
DO NOT use a dry stone on the bronze surface or
DO NOT use a dry stone on the bronze surface or
DO NOT use a dry stone on the bronze surface or
scratches will result.
scratches will result.
scratches will result.
scratches will result.
scratches will result.
SINGLE PUMP MAINTENANCE CONTINUED...