MAINTENANCE
7-83
Check Refrigerant Quantity
--- every 250 hours
CAUTION: DO NOT allow liquid refrigerant to
contact eye or skin. Liquid refrigerant will freeze
eye or skin on contact. Be careful not to loosen
connections in the air conditioner circuit.
IMPORTANT: (1) Do not operate the compressor
without refrigerant in the air condi-
tioning circuit, as doing so may
damage them.
(2) Do not overcharge the system with
refrigerant to avoid dangerous high
pressure and low cooling effect.
Air conditioner liquid tanks (2) (three pieces) are located
in room (1) under the cab. Insufficient refrigerant quantity
lowers cooling effect of the air conditioner. Check the re-
frigerant quantity through sight glass on liquid tanks (2)
(three pieces).
1. Start the engine and run at fast idle speed.
2. Turn the air conditioner and blower fan speed to the
high speed.
3. Press temperature control switch repeatedly until the
air temperature is maximum cool.
4. Check the refrigerant quantity through sight glass.
M18C-01-012
M146-07-009
Refrigerant
Quantity
Sight Glass
Appropriate
M114-07-090
Almost clear. Gas bubbles may be seen but will dis-appear by
changing engine speed.
Insufficient
M114-07-091
A steady stream of gas bubbles is seen in the liquid flowing from
the receiver-dryer.
Scarce
M114-07-092
No bubbles but misty.
5. If the refrigerant level is low, consult your authorized
dealer.
2
1
Summary of Contents for EX1900-5
Page 1: ......
Page 37: ...SAFETY SIGNS S 29 SS 411 SS 691 SS 442 M18C 01 006 SS 445 M144 07 107 ...
Page 38: ...SAFETY SIGNS S 30 SS 446 SS 723 SS3076117 SS 723 SS 410 SS 723 Loading Shovel ...
Page 39: ...SAFETY SIGNS S 31 SS3091476 M146 01 035 ...
Page 40: ...SAFETY SIGNS S 32 SS 413 M18C 01 007 M18C 01 008 ...
Page 42: ...SAFETY SIGNS S 34 MEMO ...
Page 112: ...DRIVING THE MACHINE 4 12 MEMO ...
Page 140: ...MAINTENANCE 7 8 MEMO ...
Page 146: ...MAINTENANCE 7 14 Hoses Q ty in Use Transmission Oil Cooler Hose 5 2 M18C 07 062 5 ...
Page 156: ...MAINTENANCE 7 24 4 Grouped Grease Fittings 7 Arm Ñ Lubrication M144 07 079 M144 07 005 7 ...
Page 258: ...MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS 9 2 MEMO ...
Page 274: ...TROUBLESHOOTING 11 14 MEMO ...
Page 278: ...SPECIFICATIONS 12 4 MEMO ...