PR-450 PAVEMENT PROFILER 50 Hour Service Caterpillar

1. Check and service the engine air inlet and exhaust systems.

2. Service the spray system Y-strainer.

3. Service the compressed air system.

4. Change oil in track and cutter gear reducers. (After first 50 hours only. Thereafter change every 1000 hours or Annually. See the 1000 hour or Annual Service for procedures.)

Checking Engine Air Inlet And Exhaust Systems

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IF THE ENGINE HAS BEEN RUNNING LET IT COOL OFF FIRST. THE EXHAUST DUCTING CAN BE HOT ENOUGH TO CAUSE SERIOUS BURNS.

With the engine shut down, check all clamps, bolts and ducting on the engine air inlet and exhaust system. Service as necessary to prevent any leaks and to ensure that the air cleaners are securely mounted.

Servicing Spray System Y-Strainer

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SHUT THE ENGINE DOWN BEFORE WORKING UNDER THE MACHINE. ALSO REMOVE THE KEY FROM THE IGNITION SWITCH SO THE ENGINE CANNOT BE STARTED WITHOUT YOUR PRIOR KNOWLEDGE.

1. Empty the water tank.

2. Remove the bushing, pipe and ball valve as a unit from the strainer.

3. Remove the screen from the strainer and thoroughly clean the screen in water. If necessary, use soap or detergent.

4. Reinstall the screen, bushing, pipe and valve on the strainer.

5. Fill the tank.

Servicing The Compressed Air System

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SHUT THE ENGINE DOWN BEFORE WORKING IN THE ENGINE COMPARTMENT. STAY CLEAR OF HOT EXHAUST DUCTING.

1. Shut the engine down and check the air distribution system for leaks. Repair any leaks found.

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COMPLETELY DISCHARGE THE AIR PRESSURE BEFORE ATTEMPTING TO REPAIR ANY LEAKS. A WEAK FITTING OR LINE UNDER AIR PRESSURE CAN FAIL WITH EXPLOSIVE FORCE.

2. Clean the finned cooling surfaces of the compressor.