Kubota M7-132, Operator'S Manual

Page: 305 / 332

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, ask your dealer to inspect and refill.
Checking procedure
1. Run the air conditioner in the following conditions.
• Engine speed - About 1500 rpm
• Temperature control dial - Maximum cooling
position
• Fan switch - Highest blow
• Air conditioner switch -
“ON”
2. Look into the sight glass to see if and how the
refrigerant is flowing through its circuit.
(1) Sight glass
Proper
Little or no air bubbles in
the refrigerant flow.
Low
Lots of air bubbles in the
refrigerant flow (air bub-
bles or foam passing
continuously).
Overfull or no re-
frigerant: Colourless and transpar-
ent.
Fluorinated greenhouse gases
Air conditioner gas contains fluorinated greenhouse
gases.
Industrial
designation
Quantity (kg)
CO
2
equiva-
lent (ton)
GWP
HFC-134a 1.0 1.43 1430
(Global warning potential: GWP)
IMPORTANT :
• Charge only with R134a not R12 refrigerant.
9. Washing the tractor
Misuse of the high pressure washer may cause
personal injury or machine damage, as well as the
failure or malfunction of the machine. Follow the
instruction manual and the labels on the high pressure
washer, and use it properly.
CAUTION
To avoid personal injury:
• To prevent the machine from being damaged,
set the washing nozzle to spreading water, and
keep the distance 2 m away from the machine to
clean it. When the water is directed at a pin
point area, or when the machine is washed from
too close a position with a high pressure flow:
– The cover of the wirings may be damaged or
the wiring may be cut off, causing fire.
– The hydraulic hose may be damaged,
causing a high pressure oil blow out.
This may cause injury.
IMPORTANT :
• If the machine is not washed as specified, the
following peel-off, damage or malfunction may
result.
Examples:
– The stickers or labels may peel away.
– The
electronic components, engine
compartment, transmission case, CAB and
others may get wet inside and adversely
affected.
– The crawlers, tyres, oil seals and other
rubber based components, the decorative
covers and other plastic-based components,
and the windows and other glass-based
components may get damaged.
– The paints, coatings and platings may peel
away.
No high pressure washer
(A) High pressure
(B) Low pressure
SERVICE AS REQUIRED PERIODIC SERVICE
M7132, M7152, M7172
299