Toro Groundsmaster 5900 Series Service Manual page 510

Removal (Figure 353) (continued)
Installation (Figure
Operator Cab : Service and Repairs
The air conditioning system is under high pressure. Do not loosen
any system fitting or component until after the system has been
completely discharged by a certified A/C service technician.
4. Have refrigerant evacuated from air conditioning system by a certified A/C
service technician.
5. Disconnect both evaporator core swivel fittings from front ports of expansion
valve. Immediately cap tubes and expansion valve ports to prevent moisture
and contaminants from entering the system. Position expansion valve with
attached hoses away from the mixing box.
6. Label heater hoses for assembly purposes. Loosen hose clamps and
disconnect both heater hoses from tubes on heater core.
7. Remove mixing box cover:
A. Carefully use a small pry−bar to raise head of pin in center of each rivet
that secures mixing box cover.
B. Lift rivets from cover and mixing box.
C. Remove mixing box cover.
8. Locate wire from freeze switch that is inserted into A/C evaporator core
through mount bracket cover. Carefully pull wire from cover and position it
away from cover.
9. Remove screws (item 5) that secure mount bracket cover to mount bracket.
Lift cover and position it away from mount bracket taking care to not damage
freeze switch or wires connected to the switch.
10. Carefully lift heater and A/C evaporator core assembly from frame.
11. Separate heater and A/C evaporator cores as needed using
guide. The cores are secured to each other with double sided tape (item 10).
12. Inspect seals, gaskets and insulation in mixing box assembly for tears or
other damage. Replace all damaged sealing components.
353)
1. Assemble heater and A/C evaporator cores using
2. Carefully install heater and A/C evaporator core assembly into frame in
mixing box.
3. Position mount bracket cover to mount bracket taking care to not damage
freeze switch or wires connected to the switch. Secure cover to mount
bracket with removed screws (item 5).
4. Insert wire from freeze switch into A/C evaporator core through mount
bracket cover. The wire should be inserted 51 mm (2 in) past the cover.
5. Secure cover to mixing box assembly:
A. Position mixing box cover to mixing box. Make sure that wire harness
is routed through recess in side of mixing box.
B. With the rivet pin in a raised position, insert rivets through cover and into
hole in mixing box. Press pin into rivet to secure rivet in place.
6. Using labels placed during disassembly, connect both heater hoses to tubes
on heater core and secure with hose clamps.
CAUTION
Page 9–24
Figure 353 as a
Figure 353 as a guide.
Groundsmaster ® 5900 & 5910
16227SL Rev B