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375 SE
800-00162
SINGLE PUMP MAINTENANCE CONTINUED...
3. Inspect both sides of each vane and insert in order. If pickup, heavy wear, or scoring is found, inspect the
appropriate rotor slot. Replace scored parts. Refer to the parts drawings noted in Parts Manual for part
numbers.
4. Inspect the cam ring for vane chatter marks, wear, and/or scratches. Replace if scoring is evident.
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: All cartridge kit parts must be free of burrs. Stone the mating surfaces of each part with an oiled arkansas
stone prior to assembly.
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: Pre-assembled replacement cartridge kits are available. If the oil cartridge is worn extensively, a new
kit should be used. Refer to the parts drawing listed in Parts Manual.
5. Vane and rotor wear can be checked by inserting the vane in the rotor slot and checking for excessive plat.
Replace the rotor and vanes if wear is evident.
6. Rotate the bearing while applying pressure to check for wear, looseness, and pitted or cracked races.
7. Inspect the seal and bushing mating surfaces on the shaft for scoring or wear. Replace the shaft if marks
cannot be removed by light polishing.
D. ASSEMBLY
D. ASSEMBLY
D. ASSEMBLY
D. ASSEMBLY
D. ASSEMBLY
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: Coat all parts except seals and back-up rings with clean hydraulic fluid to facilitate assembly and provide
initial lubrication. Use small amounts of petroleum jelly to hold the o-rings in place during assembly.
IMPORTANT:
IMPORTANT:
IMPORTANT:
IMPORTANT:
IMPORTANT: During handling and shipping of the precision machined cartridge parts, it is possible to raise
burrs on the sharp edges. All sharp edges on the parts of a new cartridge kit should be stoned
prior to installation.
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: To reverse direction of a new cartridge kit, simply reverse location of the inlet and outlet support plates,
and realign the cartridge with the cover. See steps V.- D-1.
1. Cartridge
-
The direction of rotation is as viewed from the shaft end; right hand rotation is clockwise; left hand, counter
clockwise.
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: If locating pins were removed from the inlet support plate, install new pins with locking flutes located within
the inlet support plate. Drive the new pins into the support plate, with a soft tip hammer.
-
Place the inlet and outlet support plates on a flat surface. Install seal packs into cavities with seal retainer
surface up. (O-rings facing downward into the cavities.)
-
Place a flex side plate over each of the support plates with bronze wear surface facing up. Align scribe
marks to make sure the correct flex side plate is used with the correct support plate.
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: Flex side plates develop a wear pattern with the rotor and vanes and should not be interchanged.
-
For right hand rotation units, set the rotor on the flat wooden board with the arrow pointing right. (For left
hand rotation the arrow should point left).
-
Assemble the vanes and inserts into the rotor in reverse order. Make sure the sharp chamfer edge of
each vane leads in the direction of rotation. All vanes must move freely in the rotor slots with no evidence
of bind.
-
Assemble the cam ring over the rotor and vanes with the arrow pointing in the same direction as the rotor.
-
Lubricate the top surface of the rotor and vanes liberally with system fluid.
