Toro Groundsmaster 4000-D Service Manual page 323

CAUTION
The air conditioning system is under high pres-
sure. Do not loosen any system fitting or compo-
nent until after the system has been completely
discharged by a certified A/C service technician.
5. Have refrigerant evacuated from air conditioning
system by a certified A/C service technician.
6. Label and remove hoses from heater core, evapora-
tor and drier--receiver. Immediately cap hoses and fit-
tings to prevent moisture and contaminants from
entering the system.
7. Loosen hose clamp that secures air duct hose to
heater/evaporator assembly covers. Slide hose from
covers.
8. Remove screws that secure top cover to bottom cov-
er. Remove top cover to access heater/evaporator as-
sembly.
9. Disassemble heater/evaporator assembly using Fig.
9 as a guide.
NOTE: The replacement of the drier--receiver is recom-
mended whenever the air conditioning system is
opened.
Installation (Fig. 7)
1. Assemble heater/evaporator assembly using Fig. 9
as a guide. Make sure that expansion valve is covered
with insulating tape to prevent condensation issues.
2. Position heater/evaporator assembly into bottom
cover in headliner. Secure top cover to bottom cover
with removed screws.
3. Slide air duct hose onto heater/evaporator assembly
covers and secure with hose clamp.
4. Remove caps that were placed on hoses and fittings
during the removal process. Using labels placed during
removal, properly secure hoses to heater core, evapo-
rator and drier--receiver.
5. Make sure that condensation hoses are secured to
bottom housing of heater/evaporator assembly and are
routed to cab frame for proper draining of condensate.
6. Connect wire harness connectors to fan motor and
binary switch on drier--receiver.
7. Make sure that all machine air conditioning compo-
nents are installed and secure.
Groundsmaster 4010--D
8. Have a certified air conditioning service technician
evacuate the air conditioning system completely, prop-
erly recharge the system with R134a refrigerant and
then leak test the system. A/C system capacity is 1.25
pounds of R134a refrigerant.
9. Operate the heater system to make sure that no en-
gine coolant leaks exist.
10.Lower and secure roof assembly (see Roof Assem-
bly Installation in this section).
1
10
10
1. Heater/evaporator assembly
2. Heater valve
3. A/C hose: evaporator to compressor
4. Air duct hose
5. A/C hose: compressor to condenser
6. A/C hose: condenser to drier
7. Heater hose: thermostat to heater valve
8. Heater hose: heater core to water pump
9. Heater hose: heater valve to heater core
10. Condensation drain hose (2 used)
11. A/C hose: drier to evaporator
9
6
5
1. Fan motor
2. Blower wheel
3. Heater/evaporator core
4. Expansion valve
5. Freeze switch
Page 9 - - 11
5
3
2
4
9
11
Figure 8
8
2
3
7
Figure 9
6. Resistor guard
7. Bottom housing
8. Top housing
9. Resistor
Operator Cab
6
8
7
1
2
4