| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-219-14-8
4-28. AIR CONDITIONING SYSTEM - MAINTENANCE INSTRUCTIONS (Continued).
(4)
Adding Oil.
(a) The method of adding oil given below, if properly followed, will prevent air and moisture from
entering the system. Since refergerant-12 gas is heavier than air, and the crankcase is loaded with this gas,
the position of the oil charging hole prevents the admission of air.
NOTE
Use only clean oil from sealed containers, Carrier Part No. PP36-1.
1
Pump down compresser. Refer to paragraph 4-28d(5).
2
Slowly remove oil filler plug.
3
Add oil to center of bull's-eye sight glass through a clean, well-dried funnel.
4
Replace oil filler plug tightly.
5
Open compressor suction and discharge stop valves.
6
Start compressor.
(5)
Removing Oil.
(a)
Pump down compressor. Refer to paragraph 4-28d(5).
drain plug. Allow amount of oil to be drained to seep out slowly around the threads of loosened plug.
(c)
Retighten drain plug.
(d)
Open compressor suction and discharge stop valves.
(e)
Start compressor.
(6)
Oil Pressure.
(a) Correct oil pressure will insure adequate compressor lubrication and satisfactory operation of
the compressor capacity control system (described in paragraph 4-28g).
(b) All compressors are designed to operate with a normal oil pressure of 45 to 55 psi (310.3 to
379.2 kPa) above suction pressure. For example, if the suction gauge reading is 40 psi (275.8 kPA), the oil
pressure gauge reading should be 85 to 95 psig (586.1 to 655.0 kPa).
4-847
|
||
|
||
