Kubota L3540 Workshop Manual page 69

L3540, L4240, L5040, L5240, L5740, WSM
Checking Refrigerant (Gas) (CABIN Model)
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.
A shortage of refrigerant impairs the air-conditioner performance.
Check the following points. If it is indicated that the amount of
refrigerant is extremely low, inspect and charge. (Refer to "10.
CABIN" service section.)
Checking Procedure
1. Run the air-conditioner in the following conditions.
- Engine speed : About 1500 min
- Temperature control lever : Maximum cooling position
- 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).
(1) Sight Glass
G-47
G GENERAL
-1
(rpm)
(leftmost)
(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.
KiSC issued 04, 2010 A
W1120282