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12.2 AIR COMPRESSOR
WARNING
Make sure power to the unit is OFF and the
power plug is disconnected and tagged be-
fore servicing the compressor.
NOTE
Prior to performing compressor (See Figure 67,
page 119) service work, a thorough review and
understanding of this section , section 12.3, or
section 12.4, page 121 is recommended.
NOTE
Do not lubricate the air compressor, it is an oil-
less design; which employs Teflon piston rings
and skirts, and pre-lubricated, sealed-for-life
bearings which require no further lubrication.
a. Air Compressor Inlet Cleaning
and Inspection
1. Inspect the inlet line for damage and leaks.
2. Clean and inspect accumulator tank for proper drain-
age:
a. Remove the flexible line from the aluminum
condensing line to the accumulator tank.
b. Mix a solution of chlorine bleach and distilled
water, mix one teaspoon (5 ml) of bleach to one
gallon (3.8 L) of water.
c. Plug the drain line on the outside of the unit; pour
one quart or one liter of solution into the accumulator,
and let stand for 5 minutes.
d. Remove the plug and allow the solution to drain.
3. Inspect the accumulator drain line for proper slope
making sure that the line is not in contact with the
evaporator coil.
4. Check to make sure that all insulation in properly se-
cured, on drain line and compressor inlet tube.
5. Re--attach inlet tube to the accumulator.
6. Check all fitting for tightness; if accumulator--mount-
ing nut is loose re--apply blue Loctite.
b. Removing the Air Compressor
WARNING
Low oxygen levels inside container. Venti-
late container before entering. Stay away
from doors while venting.
T-305
1. From inside the container: lower the upper panel in
the refrigeration evaporator section and support the
top grille with a spacer to gain more working area.
2. Cut the wire tie (item 7) and loosen the hose clamp
(item 14). Disconnect the PVC tube (item 15) from the
tube connection (item 3) of air compressor.
3. Remove four bolts (item 12) and four flat washers
(item 13) from the compressor mounting bracket
(item 11).
4. Disconnect plug (item ( Item 2)).
5. Remove the air compressor (item 1).
6. Remove two screws (item 4), two flat washers (item
5) and two locknuts (item 6) from the compressor
mounting bracket.
7. Dismount the compressor mounting bracket (item 11)
from the air compressor by removing four bolts (item
8), eight flat washers (item 9) and four locknuts (item
10).
c. Replacing the Air Compressor
1. Install the air compressor by reversing the steps in
section 12.2.a.
2. If compressor has been rebuilt or replaced with new,
function code Cd16 should be reset to "0". (see sec-
tion 9.1.4, page 102).
12.3 AIR COMPRESSOR SERVICE
(P/N 18- -00052)
Prior to the disassembly of the air compressor, follow the
steps in section 12.2.a for removal of the air compressor
from the refrigeration unit. When disassembling the
compressor, matchmark parts so that they may be
replaced in their same relative positions.
Tools needed:
a.
Impact wrench, 1/2 inch drive
b.
Torque wrench
c.
Crescent (adjustable) wrench
d.
Allen wrench, 1/4 inch
e.
Straight jaw puller
f.
Arbor press
g.
Ball peen hammer
h.
Center Punch
Tools to be made:
1. Shaft protector (blower end): cut a piece of one-half inch
OD cold rolled steel stock one inch long and tack weld
to the center of base. For the base, cut a piece of four
inch by one-half inch thick bar stock to three inches in
length.
2. Shaft protector (cylinder head end); cut a piece of one
and one-quarter inch OD x one inch ID steel tubing to
two inches long.
3. Puller backing plate; using A2 steel by 0.39 inch thick
material, make plate following the dimensions in
Figure 68.
Disassembly:
a. Place the compressor in a reasonably clean area where
there is an adequate area to disassemble the unit.
118
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