HVAC UNIT REPLACEMENT - CONTINUED
REMOVAL - CONTINUED
Water and dirt can damage refrigerant system. Five minutes of not being capped is the limit for any hose or
component. DO NOT blow shop air through refrigerant hoses. Shop air is wet (humid).
DO NOT disconnect refrigerant fittings using only one wrench. Hold one fitting in place using a wrench and
turn other fitting with a second wrench.
Remove insulation tape from expansion valve (25). Disconnect two refrigerant lines (26) from expansion valve.
Cap expansion valve (25) and refrigerant lines (26)
Remove six screws (27) and fresh air duct assembly (28) on engine side of cab firewall.
Remove gasket forming compound from duct and push rubber boot inside cab.