Carrier 69UG15 Engine Crankcase Breather, Servicing the Alternating Current Generator, Cooling

CAUTION

Do not underfill or overfill the oil bath cups. Overfilling of cups causes loss of capacity; underfilling cups causes lack of filtering efficiency.

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1.	Air Inlet Hood	4.	Inner Oil Cup
2.	Air Cleaner Body	5.	Gasket
3.	Cap Clamp	6.	Oil Cup

Figure 4-4 Air Filter (Oil Bath Type) e. Service - Body Assembly

The lower portion of the air cleaner should be inspected each time the oil cup is inspected or serviced. If there is any sign of contaminant buildup or plugging, the body assembly should be removed and back flushed.

At least once a year or at regular engine service periods, remove the entire air cleaner and perform the following:

1. Remove oil cups. Check and clean center tube.

WARNING

Do not use gasoline to clean air cleaner parts.

2.Pump solvent through the air outlet with sufficient force and volume to produce a hard, even stream out of the bottom of the body assembly. Reverse flush until all foreign material is removed.

4.4.14 Engine Crankcase Breather

The engine uses a closed type breather with the breather line attached to the cylinder head cover (see Figure 4-5). It is not necessary to dissemble valve style elements for cleaning. However, the bleed hole should be checked to ensure it is free of obstruction. Check once a year or at every 3,000 hours maintenance interval, whichever comes first.

T--343 4--6

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1.	Screw	4.	Breather Valve
2.	Breather Cover	5.	Breather Tube
3.	Bleed Hole

Figure 4-5 Engine Crankcase Breather 4.4.15 Servicing Intake Heater

1.Remove harness connection from heater.

2.Remove intake transition mounting hardware.

3.Remove intake transition, heater and both gaskets.

4.Clean old gasket material off the transition and manifold mounting services.

5.Install new heater with a new gasket on either side.

6.Assemble transition to heater and torque mounting hardware (refer to the engine manual for torque values).

7.Reconnect harness to heater connection point.

8.Coat stud on heater with protective coating.

4.5SERVICING THE ALTERNATING CURRENT GENERATOR

4.5.1Preventative Maintenance and Operating Precautions

Costly repairs and down time can usually be prevented by operating electrical equipment under conditions that are compatible with those under which the equipment was designed. Follow the instructions outlined below to insure maximum efficiency of the electrical equipment.

a. Cooling

Keep all cooling parts clean. DO NOT EXCEED TEMPERATURE RISE OF 80C (176F) ABOVE A 40C

(104F) AMBIENT. This ensures that the NEMA Class “F” insulation will not be damaged. DO NOT EXCEED RATED LOAD except as specified for the equipment. OPERATE GENERATOR AT RATED SPEED. Failure to operate generators at rated load or speed will cause overheating and possible damage to windings due to over voltage or current.