Thermo King SB-III 30 SR+, Manual

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Refrigeration Service Operations (Rev. 04/02)
64
Compressor Coupling Installation
In a tapered fit joint the entire twisting load should be han-
dled by the friction fit between the two tapered parts. The
key is only a backup and is used to index the parts correctly.
When a taper fit is machined and assembled properly a key
is not needed. In fact, if the key is not installed correctly it
may be worse than no key at all! If the key does not fit eas-
ily into the keyway, it will push the tapered components
apart and the reduced friction could lead to slippage and
premature failure.
2. To prevent the tool and crankshaft from rotating, use
one of the compressor to engine mounting screws to pin
the tool to the flange. If a nut is used to prevent the bolt
from falling out, the nut should not be tightened.
3. Use torque wrench and the appropriate Allen tool to
unscrew the coupling mounting screw. Apply a maxi-
mum of 90 ft-lb (122 N•m) of torque to the screw.
4. Once the center screw has been loosened, back the head
against the tool and it should push the coupling off the
crankshaft as you continuing turning the center screw
in a counter-clockwise direction. Using this tool will
prevent the coupling from popping off because the cen-
ter bolt and flatwasher will hold it in place.
1. Coupling 5. 10 mm Allen Tool (for large shaft compressor)
2. Long Spacers (supplied with tool) 6. 5/16 Allen Tool (for small shaft compressors)
3. Short Spacers (supplied with tool) 7. Coupling Removal Tool (P/N 204-991)
4. Socket Head Bolts (supplied with Tool) 8. Engine Mounting Flange
Compressor Coupling Removal Tool
AGA1059
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