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TK 61555-2-MM-EN
and adjust the tension).
7. Refit the belt guard.
8. Back seat the suction and discharge service valves.
9. Operate the unit at least 30 minutes and inspect the oil level in the compressor. Add or
remove oil if necessary.
10. Check refrigerant charge and add refrigerant if needed.
Compressor Coupling Removal (Standard Units)
1.
After the compressor has been removed from the unit, use the appropriate Allen tool
provided with removal tool P/N 204-991 to loosen the center bolt which holds the coupling to
the compressor shaft.
2.
Attach the tool to the coupling with the provided socket head screws and spacers. Two sets
of spacers are provided with the tool, use the short spacers with shallow compressor
mounting flanges and the longer set for deeper flanges. The side with the countersunk holes
should be toward the coupling.
3.
To prevent the tool and crankshaft from rotating, use an appropriately sized bolt 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.
4.
Use the appropriate Allen tool to loosen the coupling mounting screw.
5.
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
center bolt and flat washer will hold it in place.
Compressor Coupling Installation (Standard Units)
In a tapered fit joint, the entire twisting load should be handled 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 easily into the keyway, it will
push the tapered components apart and the reduced friction could lead to slippage and
premature failure.
The following procedure requires the key to be fitted after the tapers are pulled together with 27
N•m (20 ft-lb) torque. This verifies that the key cannot hold the tapers apart when the final bolt
torque is applied.
Use the following procedure to install a compressor coupling on the compressor crankshaft:
1.
Clean the compressor shaft taper and coupling bore taper with a solvent that leaves no oily
residue (such as naphtha, lacquer thinner, brake cleaner, or the like).
