SECTION 22: HEATING AND AIR CONDITIONING
48
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
If there is evidence that the circulating pump is
not operating as per specifications, the unit must
be disassembled for repair.
Disassembly of the pump will be necessary only
in the case of a rotor failure or motor failure.
Removal
1. Stop engine and allow engine coolant time
to cool.
2. Close shutoff valves. Refer to
"05
COOLING"
under heading
"Draining
Cooling System"
for location of valves.
3. Disconnect the electrical wiring from the
motor.
WARNING
Before proceeding with the following steps,
check that coolant has cooled down.
4. Disconnect water lines from pump at flange
connections. Place a container to recover
the residual coolant in the line.
5. Remove the two clamps holding the pump
motor to its mounting bracket. Remove the
pump with the motor as an assembly.
Installation
1. Apply gasket cement to the line flanges, put
the two gaskets in place, and connect water
lines to the pump at the flange connections.
Position the pump and motor assembly on
the mounting bracket. Position the
mounting clamps over the motor and
secure with mounting bolts.
2. Connect electrical wiring to the pump motor.
3. Open shutoff valve. Refer to
"05 COOLING"
under heading
"Draining Cooling System"
for location of valves.
4. Fill the cooling system as previously
instructed in this section under
"8.2 Filling
Heating System"
, then bleed the system as
previously instructed in this section under
"8.3 Bleeding Heating System"
.
