Accumulator Assembly Service; Blower Motor And Fan Cage - Pontiac Fiero 1988 Service Manual

1B-26 AIR CONDITIONING
l+HI Install or Connect
1. Install new orifice tube with shorter screen end
in first.
2. Install liquid line and torque to proper specifica-
tion.
3. Evacuate and charge system.
In the event that difficulty is encountered during the
removal of a restricted or plugged expansion tube (ori-
fice tube), the following procedure is recommended:
1. Remove as much of any impacted residue as
possible.
2. Carefully apply heat with heat gun (hair drier,
epoxy drier or equivalent) approximately 1/4
inch from dimples on inlet pipe. Do not over-
heat pipe.
NOTICE:
If the system has a pressure switch
near the orifice tube location, it should be
removed prior to heating the pipe to avoid dam-
age to switch.
3. While applying heat, use orifice removal tool J-
26549-C to grip the orifice tube. Use a turning
motion along with a push-pull motion to loosen
the impacted orifice tube and remove it.
4. Swab inside of evaporator inlet pipe with R-l 1.
5. Add 1 oz. of 525 viscosity refrigerant oil to
system.
6. Lubricate new orifice tube and O-ring with 525
Viscosity refrigerant oil and insert into inlet
pipe. Install in proper direction (smaller screen
first).
ACCUMULATOR A S S E M B L Y SERVICE
The accumulator assembly for the refrigerant
system has a service replacement which includes two
(2) O-rings (for the inlet and outlet connections). The
desiccant within the shell is NOT serviced separately
— it is part of the sealed accumulator assembly. See
REFRIGERANT OIL DISTRIBUTION for condi-
tions when the accumulator must be removed from the
vehicle to measure the amount of oil present inside the
accumulator.
The accumulator assembly should only be
replaced when:
• a physical perforation to the accumulator is
found, resulting in a leak.
• the system is open to air for an extended period
of time (due to a front-end collision, removed
parts, ect.). The desiccant bag will be saturated
with moisture.
DO NOT Replace the accumulator assembly
when:
• merely a dent is found in the outer shell of the
accumulator.
• the vehicle is involved in a collision and no
physical perforation to the accumulator is found.
An open refrigerant line should be capped or
have a plastic bag tightly taped around it.
NOTICE.
0
Tighten all tubing connections as
shown in torque chart (Figure 16). Insufficient or
excessive torque when tightening can result in
loose joints or deformed joint parts. Either condi-
tion can result in refrigerant leakage.
ON-VEHICLE SERVICE
ACCUMULATOR
F * l Remove or Disconnect
1. Negative ( - ) battery cable.
2. Discharge system.
3. Both lines at accumulator assembly.
4. Electrical connection at pressure cycling switch.
5. Pressure cycling switch.
6. Accumulator bracket bolt.
7. Accumulator assembly.
F+| Install or Connect
1. Accumulator assembly.
2. Accumulator bracket bolt.
3. New O-rings at both lines (lubricate with 525
viscosity refrigerant oil).
4. Both lines at accumulator assembly.
5. Pressure cycling switch.
6. Electrical connection at pressure cycling switch.
R X l Tighten
Torque accumulator lines to 41 N*m (30
ft. lbs.).
7. Evacuate and charge system.
BLOWER MOTOR AND FAN CAGE
|*"+| Remove or Disconnect
1. Negative ( —) battery cable.
2. Electrical connections at motor.
3. Cooling tube.
4. Blower motor attaching screws.
5. Blower motor.
6. Fan cage retaining nut.
7. Fan cage.
| y | Inspect
Blower cage for damage to shaft bore, vanes,
etc.
F+1 Install or Connect
1. Fan cage.
2. Fan cage retaining nut.
3. Blower motor.