Kubota B1830 Workshop Manual page 78

B1830,B2230,B2530,B3030, WSM
Checking Refrigerant (Gas) (CABIN)
CAUTION
• Liquid contact with eyes or skin may cause frostbite.
• In the event of a leakage, wear safety goggles. Escaping
refrigerant can cause severe injuries to eyes.
• In contact with a flame, R134a refrigerant gives a toxic gas.
• Do not disconnect any part of the refrigeration circuit of the
air conditioning system.
Checking procedure
1. Run the air-conditioner in the following conditions.
• Engine speed: About 1500 min
• Temperature control lever:
Maximum cooling
position (leftmost)
• Fan switch: Highest blow (HI)
• Air-conditioner switch: ON
2. Look into the sight glass (1) to see if the refrigerant is flowing
through its circuit.
IMPORTANT
• Charge only with R134a not R12 refrigerant (gas).
(Reference)
• (A) Proper: Little or no air bubbles in the refrigerant flow.
• (B) Low: Lots of air bubbles in the refrigerant flow (air bubbles
or foam passing continuously).
• (C) Overfull or no refrigerant: Colorless and transparent.
(1) Sight Glass
G-53
GENERAL
-1
(rpm)
(A) Proper
(B) Low
(C) Overfull or no refrigerant
9Y1210003GEG0062US0
KiSC issued 05, 2012 A