Cab Heater System; Air Conditioning System Performance - Toro Groundsmaster 5900 Series Service Manual

Cab Heater System

Air Conditioning System Performance

Groundsmaster ® 5900 & 5910
16227SL Rev B
The cab heater system used on the Groundsmaster 5910 consists of the
following components:
1. A heater core mounted in the headliner of the cab.
2. Hoses to allow a circuit for engine coolant to circulate through the heater core.
3. A blower fan motor that provides air movement through the heater core 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 air conditioning system.
4. Operator controls 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
Groundsmaster 5910 air conditioning system. To ensure the best system
operation, inspect the following components.
1. Make sure that the heater control fully closes the heater valve in the cab
headliner.
2. Make sure that the condenser and evaporator fins are clean.
3. Verify that refrigerant charge quantity and system operating pressures are
correct.
4. Make sure that exposed metal surfaces inside cab are insulated.
5. If ambient temperatures exceeds 43 ºC (110 ºF), apply additional window
tinting to lower solar heat load to cab.
Page 9–3 Operator Cab : General Information