Engine Maintenance
69
3. Tighten both idler adjusting arm bolts and
both idler assembly pivot bolts.
NOTE: If the idler assembly binds when
moving for belt adjustment, loosen the upper
idler support bracket mounting bolts to free
up the assembly. Check the main idler
retainer nut assembly for proper alignment
between the nut and the support bracket
slots.
Fan Belt Replacement
NOTE: Do not attempt to remove or install the
belts without loosening the adjustments. Belts
that are installed by prying over pulleys will fail
prematurely due to internal cord damage.
Lower Fan Belt
Removal
1. Loosen both idler adjusting arm bolts and both
idler pulley assembly bolts.
2. Push the idler adjusting arm IN. The lower fan
belt will come off the engine pulley. Move the
arm OUT far enough to clear the roadside
idler mounting bracket.
Installation
1. Slip the belt into the groove of the idler pulley.
2. Push the idler adjusting arm back in toward
the unit.
3. Slip the belt onto the pulley groove on the
engine.
4. Pull the idler adjusting arm back out and
adjust the belts to the proper tension.
5. Tighten the idler assembly pivot bolts and the
idler adjusting arm bolts.
Upper Fan Belt
Removal
1. Loosen the idler adjusting arm bolts and
remove the lower fan belt (see “Lower Fan
Belt” above).
2. Push the idler adjusting arm in and the idler
assembly up. The upper belt should become
slack and slip down out of the idler pulley
groove.
3. Pull the idler adjusting arm OUT. The upper
fan belt should slip off the idler pulley as the
idler pulley hub clears the curbside idler
mounting bracket.
4. Loosen the two condenser fan hub to the shaft
clamping bolts.
5. Tap the blower wheel with a soft hammer to
drive the blower wheel up the fan shaft to
provide 1/2 in. (13 mm) clearance between the
blower wheel and the inlet ring.
NOTE: If the condenser fan does not slide
on the fan shaft with light tapping, remove
the small access panel located on the
condenser coil header above the radiator
tank. Thread a 1/4-20 x 1 in. diameter bolt
into the end of the fan shaft. Tighten the bolt
and washer down on the condenser fan hub
to loosen the blower wheel. Drive the blower
wheel back to provide 1/2 in. (13 mm)
clearance between the blower wheel and
condenser fan inlet ring.
6. Lift the belt up over the condenser blower
wheel and remove it from the unit.
Installation
1. Slip the belt over the condenser blower wheel
and place it in the condenser fan pulley.
2. Drive the condenser blower wheel out toward
the condenser fan inlet ring using a soft
hammer.
3. Position the blower wheel so the edge of the
inlet ring lines up with the alignment mark on
the blower wheel.
4. Check the radial clearance between the blower
wheel and inlet ring with a gauge wire. Check
around the entire circumference to the inlet
ring and blower wheel (see “Condenser and
Evaporator Fan Location” on page 100).
5. Torque the blower hub clamping bolts to
18 ft-lb (24 N•m).
6. Seat the upper belt in the blower wheel pulley
groove.
7. Push inward on the idler adjusting arm and
slip the belt into the idler pulley groove.
Summary of Contents for Spectrum DE 30-2
Page 4: ...4...
Page 12: ...Safety Precautions 12...
Page 16: ...Specifications 16...
Page 31: ...Unit Description 31 1 Access Panels 2 Defrost Dampers Figure 12 Back View of Unit 1 2 AGA215...
Page 42: ...Operating Instructions 42...
Page 48: ...Electrical Maintenance 48...
Page 106: ...Structural Maintenance 106...
Page 110: ...Mechanical Diagnosis 110...
Page 114: ...Remote Evaporator Specifications 114...
Page 116: ...Remote Evaporator Maintenance Inspection Schedule 116...
Page 122: ...Remote Evaporator Electrical Maintenance 122...
Page 126: ...Remote Evaporator Refrigeration Service Operations 126...
Page 128: ...Remote Evaporator Structural Maintenance 128...
Page 130: ...Remote Evaporator System Diagnosis 130...
Page 134: ...Wiring and Schematic Diagrams Index 134...
Page 135: ...135 Schematic Diagram Page 1 of 2...
Page 136: ...136 Schematic Diagram Page 2 of 2...
Page 137: ...137 Wiring Diagram Page 1 of 4...
Page 138: ...138 Wiring Diagram Page 2 of 4...
Page 139: ...139 Wiring Diagram Page 3 of 4...
Page 140: ...140 Wiring Diagram Page 4 of 4...