Carrier X4 7300 Operation & Service Manual page 233

8.6.4 Clutch
To remove and reinstall the clutch (Item 2,
8.19) do the following:
1. Ensure the unit will not start automatically by
disabling any two way communication, placing
the STOP/RUN-OFF switch in the OFF position
and removing the negative battery cable.
2. Remove the upper belt and condenser fan.
Refer to Section 8.6.2
NOTE
When working with the clutch it is important
to note that the armature retaining bolt and
rotor retaining nut are both left hand thread.
Turn clockwise to remove.
3. Place the three pins of a spanner wrench (Car-
rier Transicold part number 07-00396-01) into
the holes on the face of the armature (Item 17).
Place the tool handle between the fanshaft
frame support and pod (10 o'clock position) to
prevent rotation, then loosen and remove the
armature retaining bolt and washer (15). Ensure
key (16) is not lost during disassembly. If
required, a standard 5/8
hand thread bolt can be threaded through the
center to jack the armature off the shaft.
4. Using a spanner socket (Carrier Transicold part
number 07-00303-02) remove the rotor retaining
nut (18), rotor (19) and rotor spacer (20).
5. Disconnect the coil connector and remove coil
(21). Note assembly sequence of shims (24) on
fanshaft housing for re-assembly.
6. Procure kits (clutch, coil or mounting) for reas-
sembly as required.
7. Place shims (24) onto fanshaft (3). Slide coil in
place with harness on the bottom, at the 6
o'clock position.
8. Using new spacer, install rotor and spacer onto
fanshaft. Thread rotor retaining nut onto fan-
shaft and, using spanner socket, tighten 80 to
85 ft/lbs (108 to 115 Nm).
9. Ensuring key is properly positioned. If force is
required to install key, support the shaft while
tapping key into groove. Install armature onto
fanshaft. With spanner wrench in position,
thread new armature bolt and washer into fan-
shaft and tighten 25 to 30 ft/lbs (33.9 to 40.7
Nm).
10. Using air gap measuring tool (Carrier Transicold
part number 07-00432-00) check gap. (Refer to
Technical Instruction 98-50180 for air gap tool
usage instructions.) The gap should be between
0.015 and 0.095 inch (0.38 and 2.3 mm).
Figure
& 8.6.3.
11 X 1 inch long right
8–19
11. If the gap is less than 0.015, remove enough
shims to increase the gap to approximately
0.020 inch (0.25 mm). Shims (Carrier Transicold
part number 50-00232-30) are 0.010 inch (0.25
mm) each. If the gap is more than 0.090 inch
add enough shims to reduce the gap to approxi-
mately 0.020 inch.
12. Reinstall the condenser fan and upper belt.
Refer to Section 8.6.2
8.6.5 Evaporator Fan
To remove and reinstall the evaporator fan (Item 7,
Figure 8.22) do the following:
1. Ensure the unit will not start automatically by
disabling any two way communication, placing
the STOP/RUN-OFF switch in the OFF position
and removing the negative battery cable.
2. Remove the bulkhead and air chute (if
equipped) and then remove the evaporator back
panel.
3. Mark insertion depth on supply air sensor (SAT)
to aid in reassembly and remove from the noz-
zle cover (14). Care should be taken to prevent
cutting wires on the evaporator coil.
4. Remove the two bolts (13) from the split taper
bushing (12), insert them into the threaded
holes and tighten evenly to push fan away from
the bushing. Ensure key (22) is not lost during
disassembly.
5. To reinstall the evaporator fan, ensure key is
properly positioned. If force is required to install
key, support the shaft while tapping key into
groove. Slide the fan onto the fanshaft, and
install the bushing with screws finger tight.
6. Position so that fan just touches pod. This will
set approximate gap between fan and pod as
bushing is tightened. Tighten bolts evenly and
then final tighten 11 to 14 ft/lbs (14.4 to 19.0
Nm).
7. Reinstall nozzle cover. Ensure there is even
clearance between evaporator fan and pod and
between evaporator fan and nozzle cover
(approximately one/ quarter inch both sides).
Nozzle cover center venturi lip should overlap
into evaporator fan inside diameter slightly.
Torque bolts to 66 to 80 inch/lbs (7.5 to 9.0 NM).
8. Reinstall supply air temperature sensor and air
chute/ bulkhead as required.
9. Start unit and run Pretrip to check operation.
& 8.6.3.
62-11637