PIPE 4N5038 - Caterpillar

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.
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.
Shut off the air supply to the prelube system. Release the pressurized air from the system.
Illustration 1 g00716526
Prelube pump lubricator
(1) Filler plug
(2) Drain valve
(3) Clamp
(4) Retaining ring
Slowly remove filler plug (1) from the head of the lubricator in order to release the pressure from the lubricator bowl.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Place a suitable container under the lubricator bowl and open drain valve (2) in order to drain any remaining oil from the bowl.
Loosen clamp (3). To remove the lubricator bowl, unscrew retaining ring (4).
Illustration 2 g00716538
(4) Retaining ring
(5) Lubricator bowl
(6) Gasket
(7) Wick assembly
Remove retaining ring (4), lubricator bowl (5), and gasket (6), and wick assembly (7).
Clean the wick assembly and the bowl with nonflammable solvent. 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 for the lubricator is set to the half position at the factory. The height of the wick must be adjusted when a reduction in the delivery of the oil mist is noticeable.
Use the following steps to adjust the rate of the oil mist, if necessary.
Illustration 3 g00716721
Wick assembly (7) in the venturi of the head of the lubricator
(8) Wick
(9) Locknut
(10) Adjusting nut
(11) Notch
Loosen locknut (9).
Adjust the height of wick (8) by turning adjusting nut (10). To increase the oil mist, raise the wick. To decrease the oil mist, lower the wick.Notch (11) is located on the adjusting nut. The height of the wick is visually indicated by the relative position of the notch to the bottom of locknut (9).
Install wick assembly (7) into lubricator bowl (5).
Inspect gasket (6) for good condition. If the gasket is damaged, obtain a new gasket for assembly. Install the gasket, lubricator bowl (7), and retaining ring (4). Tighten the retaining ring by hand.
Make sure that drain valve (2) is closed. Fill the lubricator bowl through the hole for filler plug (1) in the head of the lubricator.
Inspect the O-ring seal for filler plug (1). If the seal is damaged, obtain a new seal for assembly. Install the seal and the filler plug.