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Air Conditioning System
Air Conditioning Components
Air Conditioning Performance
Groundsmaster
®
3200, 3300 and 3310
19240SL Rev A
The air conditioning system used in the machine operator cab consists of the
following components:
•
A compressor mounted on the left side of the engine driven by a single V−belt.
•
A condenser assembly with two (2) condenser fans located outside the rear
of the cab roof assembly.
•
An evaporator, a drier−receiver and an expansion valve mounted in the
headliner of the cab.
•
A refrigerant pressure switch
•
A thermostat
•
An evaporator freeze switch
•
3 relays (condenser fans, air conditioning switch signal, compressor clutch)
•
The necessary hoses and tubes that connect the air conditioning system
components.
•
A blower fan motor that provides air movement through the evaporator and
into the cab. The fan motor is a component of the mixing box located in the
cab headliner. The fan motor is also used for the cab heating system.
•
Operator controls to turn the air conditioning on, to adjust the fan speed and
to control the cab air temperature.
There are a number of factors that can affect the performance of the machine air
conditioning system. To ensure that the system operates at its best, inspect the
following components.
•
Make sure that the heater control fully closes the heater valve in the cab
headliner.
•
Make sure that the condenser and evaporator fins are not obstructed and
clean.
•
Verify that refrigerant charge quantity and system operating pressures are
correct.
•
Make sure that exposed metal surfaces inside cab are insulated.
•
If the ambient temperatures exceeds 43 C (110 F) apply additional window
tinting to lower the solar heat load to the cab.
Page 9–5
Operator Cab: General Information
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