Case 580SR Service Manual page 770

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10 SECTION 50 - CAB HEATING AND AIR CONDITIONING
OVERHAUL
IMPORTANT: when overhauling the heating system
remember that, with the engine running or shortly af-
ter it is turned off, the system will be at engine tem-
perature and therefore the water will be hot and
under pressure.
To effect repairs to the heater core or blower motor,
it will be necessary to remove the attaching bolts (1)
from the seat and remove seat from the heater hous-
ing.
Draining the system
To drain the cooling system down disconnect either
hose at the T junction (2) found at the rear of the en-
gine oil filter mounted to the left hand side of the en-
gine.
2
F28674
Heater radiator
With the system drained remove the heater radiator
hose connections, attaching bolts and remove from
the vehicle.
Inspect the heater radiator (3).
Check water flow through the heater pipe which
should be free running; if not, clear any blockage.
Fins should be free of all debris and not damaged;
clean and or repair.
Clean the heater radiator using compressed air not
exceeding 7 bar taking care not to damage the radi-
ator fins.
Ensure the radiator is not leaking under pressure;
repair or replace as required.
Clean the chamber with a damp, cloth and re-as-
semble the housing filter element with the seal fac-
ing the inside of the cover.