Repair
18 309574C
Repair
Pump Removal
See manual 309577 for pump repair instructions.
1. Shut off , , and heat zones.
2. Flush pump, page 7.
3. Relieve pressure, page 8.
4. Turn PRESSURE RELIEF/SPRAY valves (SA, SB)
to PRESSURE RELIEF.
5. Press . Motor will run until component A pump
is at bottom of its stroke, then shut off.
A
TI2481A
SA
SB
6. Turn main power OFF . Disconnect power
supply.
Steps 7-9 apply to pump A. See F
IG
. 1. To discon-
nect pump B, go to steps 10 and 11.
7. Disconnect fluid inlet (C) and outlet (D). Also discon-
nect steel outlet tube from heater inlet.
8. Disconnect tubes (T). Remove tube fittings (U) from
wet-cup.
9. Loosen locknut (G) by hitting firmly with a non-spark-
ing hammer. Unscrew pump far enough to expose
retaining pin under plastic finger guard. Push retain-
ing spring up. Push pin out. Continue unscrewing
pump.
Steps 10 and 11 apply to pump B. See F
IG
. 2.
10. Disconnect fluid inlet (C) and outlet (D). Also discon-
nect steel outlet tube from heater inlet.
11. Push retaining spring (E) up. Push pin (F) out.
Loosen locknut (G) by hitting firmly with a non-spark-
ing hammer. Unscrew pump.
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