Thermo King SB-210, Manual

Page: 111 / 159

Refrigeration Service Operations
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3. Using no lubricants, set the coupling on the
crankshaft and align the keyways using the
Keyway Tool (P/N 204-972). Insert the
tapered end of the tool into the keyway and
gently move the coupling on the shaft while
pressing the tool into the keyway. This will
align the keyway in the crankshaft with the
keyway in the coupler.
Figure 96: Keyway Tool P/N 204-972
4. Remove the Keyway Tool and check the fit of
the key (P/N 55-9024). It should fit into the
keyway with a light press fit requiring only a
minimum of light tapping. If the key does not
fit properly, remove the coupler and inspect
the keyways and key for burrs or other
problems. Recheck the fit as shown above.
5. When the key fits properly, remove the
coupling and key from the shaft.
6. Re-install the coupling and align the keyways
with the Keyway Tool.
7. Do not install the key at this time. Install the
flat washer and bolt and pre-torque to 20 ft-lb
(27 N•m). Remove the bolt and washer.
8. Install the key in the keyway. As above, it
should fit with a light press fit requiring only a
minimum of light tapping. Do not install the
key into the keyway beyond the front face
of the coupling. If tapped in farther it may
cause the coupling to move off center on the
shaft.
9. Re-install the bolt and heavy flat washer and
snug the bolt down by hand. Torque the bolt to
90 ft-lb (122 N•m).
10. Spray a corrosion inhibitor (such as spray
paint) on the exposed part of the shaft and the
joint between the shaft and the coupling. This
prevents moisture from wicking into the joint
and causing corrosion.
Condenser Coil
Removal
1. Recover the refrigerant charge.
2. Open the roadside condenser fan grille.
3. Drain engine coolant from the expansion tank.
Unbolt and remove the expansion tank from
the condenser coil frame.
4. Remove the condenser coil mounting bolts.
Remove the mounting clamps from the
condenser inlet line.
CAUTION: If you are assembling a used
coupler or crankshaft and the tool does
not fit easily there is a problem with one of
the keyways! Do not remove the coupler
and place the key in the crankshaft
keyway and then drop the coupler on. If
the tool does not fit, the key will not fit,
and it will hold the taper in the coupler off
the taper on the shaft. Check both keyways
for burrs or corrosion. A key can be
coated with fine lapping compound and
used as a lapping tool to clean the
keyways.
AGA333
1. Compressor Coupling or Clutch
2. Key tapped flush with outside face of coupling.
Do not tap key any farther into keyway.
3. Torque bolt to 90 ft-lb (122 N•m)
4. Washer
5. Spray this area with corrosion inhibitor after
assembling.
Figure 97: Compressor Coupling Installation
AGA1254
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