Daewoo Mega 500-V - Cleaning and Inspection (Wear Limits and Tolerances)

S0708460K
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Main Pump (Denison T6DMY Series)
CLEANING AND INSPECTION (WEAR LIMITS AND
TOLERANCES)
For general cleaning and inspection procedures, refer to "General Maintenance Procedures" section.
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 contamination.
1. Discard shaft seal(s), O-rings, back-up rings and seal packs. Use a new seal kit for reassembly.
Wash metal parts, blow them dry with air and place on a clean surface for inspection.
2. Check cartridge wear surfaces for pickup, scoring and excessive wear. Slight heat discoloration of
flex side plate bronze surface is normal. Score marks deeper than 0.025 mm (0.001 in) and scratches
deeper than 0.051 mm (0.002 in) indicate a new part is needed. Slight scoring and/or scratches can
be removed with an oiled Arkansas stone.
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.
4. Inspect the cam ring for vane chatter marks, wear and/or scratches. Replace if scoring is evident.
NOTE: All cartridge kit parts must be free of burrs. Stone the mating surfaces of each part with an
oiled Arkansas stone before assembly.
NOTE: Pre-assembled replacement cartridge kits are available. If the old cartridge is worn
extensively, a new kit should be used.
5. Vane and rotor wear can be checked by inserting vane in rotor slot and checking for excessive play.
Replace rotor and vanes if wear is evident.
6. Rotate bearing while applying pressure to check for wear, looseness and pitted or cracked races.
7. Inspect seal and bushing mating surfaces on shaft for scoring or wear. Replace shaft if marks cannot
be removed by light polishing.
CAUTION!
DO NOT use a dry stone on the bronze surface or scratches will result.
CAUTION!
Replacement ring width must be identical to the ring being replaced or reduced life and/or
output flow will result. The minimum ring to rotor clearance limits are noted below.
MINIMUM ALLOWABLE RING ROTOR CLEARANCE
MODEL
MINIMUM CLEARANCE
LIMITS IN MM (INCHES)
T6DMY - 038 0.038 mm
(0.0015 in)