United Technologies Carrier Transicold 69UG15, Operation And Service

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5–3 T-360
5.4.6 Lube Oil Filter
The primary oil filter is located near the radiator fan (see Figure 2.9 ).
1. After warming up the engine, stop engine, remove drain plug from oil reservoir and drain engine lube oil.
2. Replace filters. Lightly oil gasket on filter before installing.
3. Add lube oil (Refer to Section 2.10 ).
4. Warm up engine and check for leaks.
5.4.7 Servicing the Low Coolant Sensor
1. Testing the Low Coolant Sensor (LCS)
a. Verify the coolant level is correct.
b. Verify the wiring to the sensor is correct.
c. Check voltage (12.5 to 13.5 VDC) to the B terminal with the ignition switch on (see Figure 5.2 ).
d. Check continuity between terminals A and C (see Figure 5.2 ) while 12 VDC is applied to terminal B.
e. Drain the coolant from the system to below the level of the coolant sensor and remove the sensor as
described in Section 4.4.7.2. , steps a and b below.
f. With the sensor removed from the radiator and 12 VDC applied to terminal B, the circuit between termi-
nals A and C should be open.
Figure 5.2 Low Coolant Sensor
CAUTION
!
Never open the radiator cap when the coolant is hot.
2. Replacing the Low Coolant Sensor (LCS)
a. Loosen the radiator drain pet cock and drain coolant to a point below the sensor into an approved container.
b. Unplug the harness and remove sensor from radiator header.
c. Apply Teflon thread tape or thread sealer to the LCS threads and install sensor.
d. Reconnect the harness and refill the radiator to proper level.
5.4.8 Servicing Low Oil Pressure Switch
1. Remove harness connection from low oil pressure switch (LOP).
2. Remove pressure switch from engine.
3. Apply Teflon thread sealer to threads of new low oil pressure switch.
4. Install new low oil pressure switch.
5. Reconnect harness connection to low oil pressure switch.