Caterpillar Compact Track Loader 277

Refer to the Service Manual for the complete adjustment procedure for the engine valve lash.

A qualified mechanic should adjust the engine valve lash and the fuel injector timing because special tools and training are required.

Bogie and Idler Oil Level - Check

Note: Inspect the seals on the tubes for the bogies and the idlers during the walk around inspection. If a seal is leaking, replace the seal.

Note: The 267B (S/N: CYC 954-UP), 277B (S/N: MDH 3315-UP), and 287B (S/N: ZSA 2205-UP) have sealed bearings. The bogie is maintenance free. If maintenance is required on the bogie, please refer to your Caterpillar dealer.

Personal injury or death can result from servicing the track.

The machine must be on a hard, level surface before the track is removed or personal injury or death could occur.

1. Park the machine on a hard, level surface.

Personal injury or death can result from improper lifting or blocking.

Engine Crankcase Breather - Clean

Note: This type of engine crankcase breather is used on naturally aspirated engines only.

Note: Ensure that the area around the vent hole on the breather cover is clean and that the vent hole is not restricted. Ensure that the breather hose is installed correctly, so that the hose does not contact other parts. Ensure that the components of the breather assembly are seated in the correct positions. Otherwise, engine damage could result.

1. Open the engine access door. Refer to Operation and Maintenance Manual, “Access Doors and Covers”.

2. Tilt the radiator upward. Refer to Operation and Maintenance Manual, “Radiator Tilting”.

3. Loosen the hose clamps (1) for the breather hose. Remove the breather hose.

4. Remove the screws (3). Remove the breather cover (4).

5. Remove the diaphragm assembly (5). The diaphragm assembly consists of the diaphragm and the locating ring. Remove the spring (6).

6. Clean the following items with a clean, nonflammable solvent:

Bogie and Idler - Inspected/Replaced

Engine Air Filter Service Indicator - Inspected

Fuel System Primary Filter (Water Separator) - Drained

Hydraulic System Oil Level - Checked

Lift Arm and Cylinder Linkage - Lubricated

WARNING: 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.

NOTICE: If the refrigerant system has been open to the outside air (without being plugged) for more than 30 minutes, the receiver-dryer must be replaced. Moisture will enter an open refrigerant system and cause corrosion which will lead to component failure.

Refer to Service Manual, SENR5664, “Air Conditioning and Heating R-134a For All Caterpillar Machines” for the proper procedure to change the receiver-dryer assembly and for the procedure to reclaim the refrigerant gas.

Note: The receiver-dryer must also be replaced when the air conditioning system is evacuated.

Did you replace the Refrigerant Dryer?

Did you use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system?