Thermo King UT-1200, Manual

Page: 130 / 169

Refrigeration Service Procedures
130
21. Install the Woodruff key and drive pulley.
Torque the pulley bolt to 18 to 22 ft-lb (24 to
30 N•m).
.
Compressor Oil Filter Replacement
Thermo King recommends changing the
compressor oil filter when there is a major system
interruption, such as component replacement or
total loss of refrigerant charge. When the oil filter
is changed, Thermo King also recommends
changing the oil.
1. Recover refrigerant. Equalize pressure to
slightly positive.
2. Clean oil filter cover plate area of excess dirt.
3. Remove cover plate and spring, noting the
location of hex studs for proper installation.
4. Scrape gasket off compressor body and cover
plate.
5. Remove oil filter and o-ring.
6. Clean oil filter cavity of any noticeable debris.
7. Lubricate new o-ring with compressor oil.
8. Press oil filter and o-ring over stem in
compressor body until seated.
9. Lubricate new gasket with compressor oil.
10. Install spring, new gasket, and cover plate
using hex studs and hex head screws. Torque
hex studs and hex head screws to 290 to 310
in-lb (34 to 36 N•m). Be certain to install hex
studs in their original location.
.
Compressor Oil Change
1. Recover refrigerant. Equalize pressure to
slightly positive.
2. Clean oil drain cap area (bottom and bottom
rear of compressor) of excess dirt.
3. Remove oil drain plug from bottom rear of
compressor to drain oil. Measure amount of
oil drained from compressor.
4. Remove two screws and oil drain cap from
compressor.
5. Scrape gasket from oil drain cap and body.
6. Remove spring, screen and screen cover from
body.
7. Clean screen and cover.
8. Replace screen cover, ensuring notch in cover
is aligned with notch in body.
9. Lubricate new gasket with compressor oil.
10. Replace screen, spring, gasket, drain cap, and
screws.
11. Torque screws to 290 to 310 in-lb (34 to
36 N•m).
12. Lubricate o-ring on SAE plug with
compressor oil.
13. Replace SAE plug in rear bottom of body.
Torque to 100 to 110 in-lb (11.2 to 12.4 N•m).
14. Measure oil removed and add an equal amount
of compressor oil (P/N 203-516) by pouring
oil into the oil filter cavity.
NOTE: The gasket must be replaced (see Parts
Manual).
Parts List (Required)
Seal Cover O-ring See Parts Manual
Use Seal Kit See Parts Manual
Parts List (As Needed)
Torx Screws See Parts Manual
Parts List (Required)
Oil Filter and O-ring See Parts Manual
Gasket See Parts Manual
Parts List (As Needed)
Cover Plate See Parts Manual
Spring See Parts Manual
Hex Studs See Parts Manual
Torx Screws See Parts Manual
Other Parts Which May Be Used (As Needed)
Are:
SAE Plug See Parts Manual
Torx Head Screws See Parts Manual
Cover Plate See Parts Manual