Service Manual

Groundsmaster 360 Operator CabPage 8.1 − 21
(Rev. A)
Removal (Fig. 13)
1. Park machine on a level surface, lower cutting deck
and stop engine. Remove key from the ignition switch.
2. To access heater and A/C evaporator cores, remove
roof panel from top of cab (see Roof Assembly in this
section).
3. Read the General Precautions for Removing and
Installing Air Conditioning System Components at the
beginning of the Service and Repairs section of this
chapter.
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.
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 con-
taminants 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 assem-
bly from frame.
11.Separate heater and A/C evaporator cores as need-
ed using Fig. 13 as a 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 dam-
aged sealing components.
Installation (Fig. 13)
1. Assemble heater and A/C evaporator cores using
Fig. 13 as a guide.
2. Carefully install heater and A/C evaporator core as-
sembly into frame in mixing box.
3. Position mount bracket cover to mount bracket tak-
ing care to not damage freeze switch or wires connected
to the switch. Secure cover to mount bracket with re-
moved screws (item 5).
4. Insert wire from freeze switch into A/C evaporator
core through mount bracket cover. The wire should be
inserted 2 inches (51 mm) 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.
7. Remove caps that were placed on evaporator core
tubes and expansion valve ports during the removal pro-
cess. Position expansion valve with attached hoses to
the evaporator core tubes. Properly secure evaporator
core swivel fittings to front ports of expansion valve.
Torque fittings from 15 to 20 ft−lb (21 to 27 N−m).
8. Make sure that all machine air conditioning compo-
nents are installed and secure.
9. Make sure that expansion valve is covered with insu-
lating tape to prevent condensation issues.
10.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 3.44
pounds of R134a refrigerant.
11.Operate the heater system to make sure that no
coolant leaks in headliner exist.
12.Secure roof panel to top of cab (see Roof Assembly
in this section).
Operator
Cab