83–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, set the parking brake, and chock the tires.
Before working under the vehicle, always place
jack stands under the frame rails to ensure the
vehicle cannot drop. Failure to follow these steps
could result in serious personal injury or death.
83–01 Air Conditioner
Inspection
WARNING
Wear eye protection, gloves, and protective cloth-
ing when working on the air conditioning system.
Leaking refrigerant from a damaged hose or line
could cause blindness or serious skin burns.
Preliminary Checks
1.
Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
2.
Check the appearance of the air conditioner
compressor pulley assembly. If the friction sur-
face of the pulley shows signs of excessive
grooving due to belt slippage, replace both the
pulley and the drive plate. Inspect the refrigerant
compressor drive belt for damage and check that
the belt is set at the proper tension. Also check
the tightness of the compressor mounting fasten-
ers. For instructions and torque values, see
Group 01
of the
Columbia® Workshop Manual
.
3.
Inspect the drive plate. If the friction surface of
the drive plate shows visible signs of damage
due to excessive heat, replace the drive plate
and pulley assembly. For removal and installation
procedures, see
Group 83
of the
Columbia®
Workshop Manual
.
4.
On a Sanden A/C compressor, use a feeler
gauge to check that the drive plate clutch clear-
ance is 0.016 to 0.030 inch (0.4 to 0.8 mm). See
. If the drive plate clutch requires adjust-
ment, see
Group 83
of the
Columbia® Work-
shop Manual
.
On a Climate Control A/C compressor, place a
feeler gauge between the air conditioner com-
pressor clutch and the pulley to check the com-
pressor clutch clearance. Drive plate to pulley
clearance is 0.020 to 0.030 inch (0.6 to 0.8 mm).
If the clearance is not correct, see
Group 83
of
the
Columbia® Workshop Manual
.
5.
Inspect the compressor clutch coil wire. Check
that the connector is not damaged or loose. Re-
place the wire if it is damaged.
6.
Check the overall condition of the air conditioning
hoses. Look for cracks, cuts, and abrasions on
the hoses. Replace damaged hoses. For re-
placement instructions, see
Group 83
of the
Columbia® Workshop Manual
. Also check for
loose fittings on all of the air conditioning compo-
nents.
7.
Check for a buildup of road debris on the con-
denser fins. For cleaning instructions, see
Group
83
of the
Columbia® Workshop Manual
.
Refrigerant Checking
Check the color of the moisture indicator on the
receiver-drier. See
If the indicator is blue, the refrigerant charge is dry.
If the indicator is not blue, the system is contami-
nated with water. If the system is contaminated, the
refrigerant must be recovered and the receiver-drier
must be replaced. For instructions, see
Group 83
of
the
Columbia® Workshop Manual
.
f830641
10/07/2016
Fig. 1, Drive Plate Clearance Inspection
Heater and Air Conditioner
83
Columbia Maintenance Manual, September 2015
83/1
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