Refrigerant
quantity
Check item Almost no
refrigerant Insufficient Suitable Too much
refrigerant
Temperature of high
pressure and low
pressure hoses Almost no difference
between high
pressure and low
pressure side
temperature High pressure side is warm and low pressure side is fairly cold High pressure side
is hot and low
pressure side is cold High pressure side is abnormally hot
State in sight glass
P
z
0 Bubbles continuously. Bubbles disappear something will
refrigerant gone flow is like
flow will and mist when
nearly
\il The bubbles
seen at intervals 1 - 2 seconds NI are
of Almost transparent. Bubbles may appear when engine speed is raised and lowered.
No clear difference between these No
seen
two
bubbles can be
exists
conditions
lei
10-
ro 0 -::-
00 0
0 00
. . 00
(:)....:,00 y PR
0
(00)
Pressure of system High pressure side is abnormally low Both pressure on high and low pressure side are slightly low Both pressures on
high and low
pressure are normal Both pressures on high and low pressure sides are abnormally high
Repair Stop compressor
immediately and
conduct an overall check Check for gas
leakage, repair as required and recharge system Discharge
refrigerant from
service valve of low pressure side
Refrigerant level check
Table 301
AAAA
Validity : Vapor cycle cooling system - KEITH 1 2 1 5-03Page 302
(BA) JUN 02
OIL LEVEL
SERVICING
1. OIL LEVEL CHECK (Figures 301 and 302)
A. Tools and consumable materials
- Oil (TB 05-923)
- PARKER HANNIFIN REF. JBS 63-1 dipstick
- Syringe
- Lint-free clean cloths
B. Procedure
WARNING : DISCHARGE THE SYSTEM PRIOR TO THE OIL LEVEL CHECK.
NOTE : It is not necessary to check oil level as routine maintenance.
Perform a check whenever one component is changed or when it is specified by the trouble-shooting procedure.
Do not overcharge with oil as too much oil reduces system performance.
中國航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：TB20 MAINTENANCE MANUAL 12 SERVICING TB20飛機(jī)維護(hù)手冊 12 保養(yǎng)(50)
