TUBE AS 4203532 - Caterpillar

Never allow the lubricator bowl to become empty. The prelube pump will be damaged by a lack of lubrication. Ensure that sufficient oil is in the lubricator bowl.
Note: The height of the wick inside the lubricator bowl determines the amount of oil that is delivered by the lubricator. The height of the wick must be adjusted when a reduction in the delivery of the oil mist is noticeable. If the lubricator bowl requires more frequent filling, the height of the wick probably needs to be adjusted. For the procedure, see this Operation and Maintenance Manual, "Air Prelube Pump Lubricator Bowl - Clean".
Illustration 1 g00716875
(1) Sight gauge
(2) Filler plug
Observe the oil level in sight gauge (1). If the oil level is less than 1/2, add oil to the lubricator bowl.
Personal injury can result from removing hoses or fittings in a pressure system.Failure to relieve pressure can cause personal injury.Do not disconnect or remove hoses or fittings until all pressure in the system has been relieved.
Ensure that the air supply to the lubricator is OFF. Slowly remove filler plug (2) in order to release pressure from the lubricator bowl.
Remove filler plug (2). Pour oil into the hole for the filler plug in the head of the lubricator. Fill the bowl to the top. Use "10W" oil for temperatures that are greater than 0°C (32°F). Use air tool oil for temperatures that are below 0°C (32°F).
Inspect the O-ring seal for the filler plug. If the seal is damaged, obtain a new seal for assembly. Install the seal and filler plug (2).