User's Manual

Repair

50 332144C

Overtemperature Switch

1. See Before Beginning Repair, page 39.

2. Wait for heaters to cool.

3. Remove heater shroud (90) and electronics cover

(55). See F

. 15, page 48.

4. Disconnect one leadwire from overtemperature

switch (308), F

. 16. Test across switch with ohm-

meter. Resistance must be approximately 0 ohms.

5. If switch fails test, remove wires and screws. Dis-

card failed switch. Apply thermal compound

110009, install new switch in same location on

housing (301), and secure with screws (311).

Reconnect wires.

NOTE: If wires need replacement, disconnect from

heater control module. See F

. 24 on page 73.

Pressure Transducers

1. See Before Beginning Repair, page 39.

2. Remove back cover (26).

3. Disconnect transducer cables from J11 and J12

connectors. Reverse ISO and RES transducer con-

nections and check if status codes follows the bad

transducer.

4. Replace transducer if the transducer fails test.

a. Remove supply tank, page 39.

b. Follow transducer cable on cart frame and cut

zip ties. Disconnect transducer from pump out-

let manifold.

c. Install o-ring (553) on new transducer (554).

Apply lubricant to o-ring (553).

d. Install transducer (554) in manifold. Mark end of

cable with tape (red = ISO, blue = RES).

e. Route cable back through cart frame to the con-

trol board. See F

. 12, page 45.

f. Install supply tank.

ti21923a

354

. 17. Transducer

ti21846a

553

554