York Turbomaster M 255, Инструкция по установке, эксплуатации и обслуживанию

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YORK INTERNATIONAL
46
FORM 220.11-NM2 (602)
7. Remove 12-point cap screw (46) and remove the
centrifugal oil pump (41).
8. Remove the thrust bearing or combination thrust
and journal bearing. If combination bearing is
used, raise rotor shaft to ease removal.
Separable journal bearings are posi-
tioned away from the thrust bearing
with a roll pin or a ventilated spacer.
9. Separate thrust bearings come in two styles, hy-
drostatic flat aluminum and tilting pad with Babbit
metal shoes. The hydrostatic thrust is sometimes
incorporated with the discharge end shaft bearing
as a single unit. Both styles of aluminum thrust
bearings are used with an oil pump that has pock-
ets on the forward thrust face. These pockets act
TABLE 12 - CLEARANCES (INCHES) TYPICAL
as oil pumps, circulating oil across the thrust face
and out through small holes, which develop oil
pressure greater than the compressor main oil pres-
sure. Oil off the thrust is circulated through the oil
coolers and returned to the sump via the jet pump
nozzle.
*NOTE:
Assembly clearance is dependent on rotational speed. Some high speed compressors require greater clearance. Aluminum seals only see
compressor application data sheet for other materials.
MAXIMUM OIL PUMP
COMPRESSOR
THRUST BEARING
RUNOUT (T.I.R.)
OIL SEAL DIAMETRAL CLEARANCE
SIZE AXIAL CLEARANCE
FACE RIM DRIVE END RESERVOIR END
25" .008 - .012 .0005 .0005 .002 - .005 .001 - .004
26" .008 - .012 .0007 .0006 .002 - .005 .002 - .007
38" .010 - .014 .0010 .0008 .003 - .006 .002 - .007
55" .013 - .017 .0013 .001 .004 - .008 .002 - .007
TABLE 13 – SCREW SIZES FOR PULLING DRIVE
END JOURNAL BEARING
COMPRESSOR
COUPLING
SCREW
SIZE
SIZE
(INCHES)
226 1-1/2 10-24
238
1-7/8 10-24
2-1/2 1/4-20
3 3/8-16
255
3 3/8-16
3-3/4 3/8-16
Service
COMPRESSOR
VOLUTE SEAL *BALANCE PISTON SHAFT LABYRINTH IMPELLER INLET
RESERVOIR END MAIN
SIZE
DIAMETRAL SEAL DIAMETRAL DIAMETRAL LABYRINTH DIAMETRAL
BEARING DIAMETRAL
CLEARANCE CLEARANCE CLEARANCE CLEARANCE
CLEARANCE
(SMALL END, TAPER BORE)
25" .004 - .007 * .011 - .014 .0112 - .017 .001 - .003
26" .003 - .009 * .014 - .024 .020 - .025 .002 - .005
38" .003 - .009 * .020 - .030 .030 - .037 .002 - .005
55" .004 - .011 * .020 - .039 .044 - .053 .0025 - .0055
COUPLING
SUCTION END
DIAMETRAL DIAMETRAL DIAMENTRAL
SIZE
COMPRESSOR
BEARING
CLEARANCE CLEARANCE CLEARANCE
SIZE
LENGTH
SHAFT TO BEARING SHAFT TO BEARING BEARING TO BEARING
(SMALL END, TAPER BORE)
TAPERLAND HOUSING
1" 25" 1-9/16" .0015 - .0035 .0015 - .0035 .0005 - .0025
1-1/4" 25" & 26" 1-11/16" .002 - .004 .002 - .004 .0005 - .0025
1-1/2" 25", 26" & 38" 2-3/8" .002 - .004 .003 - .005 .001 - .003
1-7/8" 26", 38" & 55" 3-1/4" .0025 - .0045 .003 - .005 .001 - .003
2-1/2" 38" & 55" 4-7/32" .003 - .005 .004 - .006 .0015 - .005
3" 38" & 55" 5-1/4" .004 - .006 .005 - .007 .002 - .0055
3-3/4" 55" 6" .006 - .008 .006 - .008 .002 - .0055