Engine Valve Lash - Check
Maintenance is recommended by Caterpillar for engine valve lash adjustments. The maintenance for the engine valve lash is part of the lubrication and preventive maintenance schedule in order to provide maximum engine life.
Note: The engine valve lash should be checked at every 2000 hours or 2 years.
NOTICE: Only qualified service personnel should perform this maintenance. Refer to the Service Manual or your Caterpillar Dealer for the complete engine valve lash adjustment procedure.
Be sure the engine cannot be started while this maintenance is being performed. To prevent possible injury, do not use the starting motor to turn the flywheel.
Hot engine components can cause burns. Allow additional time for the engine to cool before measuring/adjusting engine valve lash clearance.
NOTICE: Operation of Caterpillar Engines with improper engine valve lash adjustments will reduce the engine efficiency. This reduced efficiency could result in excessive fuel usage and/or shortened engine component life.
Measure the engine valve lash with the engine stopped. To obtain an accurate measurement, allow at least 20 minutes for the valves to cool to engine cylinder head and block temperature.
Refrigerant Dryer - Replace
Personal injury can result from contact with refrigerant.
Contact with refrigerant can cause frost bite. Keep face and hands away to help prevent injury.
Protective goggles must always be worn when refrigerant lines are opened, even if the gauges indicate the system is empty of refrigerant.
Always use precaution when a fitting is removed. Slowly loosen the fitting. If the system is still under pressure, release it slowly in a well ventilated area.
Personal injury or death can result from inhaling refrigerant through a lit cigarette.
Inhaling air conditioner refrigerant gas through a lit cigarette or other smoking method or inhaling fumes released from a flame contacting air conditioner refrigerant gas, can cause bodily harm or death.
Do not smoke when servicing air conditioners or wherever refrigerant gas may be present.
Use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system.
Note: When you operate the machine in a climate with high humidity, replace the refrigerant accumulator after every 1000 service hours or 6 months.
Transmission and Hydraulic System Tank Breather - Clean
Turbocharger - Inspect
If the turbocharger fails during engine operation, severe damage to the turbocharger compressor wheel and to the entire engine can result.
Turbocharger bearing failures can cause large quantities of oil to enter the intake system and the exhaust system. Loss of engine oil can result in serious engine damage.
Do not continue to operate the engine when a turbocharger bearing failure is accompanied by a significant loss of engine performance. Engine smoke and speeding up of the engine with no load are characteristics of a loss of engine performance.
Source: MaintainX (Community Member)