KIT-SEAL 2884608 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures.Hydraulic System
Service Screen and Filters
1. Relieve the internal pressure from the hydraulic tank by loosening the fill/vent plug. After the pressure is relieved, tighten the fill/vent plug.2. Remove the anti-slip plate on top of the hydraulic tank.3. Clean area thoroughly to keep dirt out of screen and filter covers and fill/vent plug.Clean the Screen
1. Remove bolts (1), washers (2) and cover (3). Do not allow spring (4) to fall into the tank.2. Remove spring (4) and screen (5).3. Wash screen (5) in clean nonflammable solvent and allow to dry. Inspect and replace screen (5) if it is damaged. 4. Inspect O-ring seals (6) and (7) and replace them if they are worn or damaged.5. Perform Steps 1 and 2 in reverse order for installation procedure. During installation, make sure O-ring seals and spring are properly positioned.Change the Return Filter
Three return filters are located at the left side of the hydraulic tank. Use the same procedure for changing the return filters. 1. Relieve the internal pressure from the return filter by slowly loosening the vent plug. After the pressure is relieved, tighten the plug. 2. Remove bolts (1), washers (2) and cover (3).3. Remove spring (4), valve (5) and element (6) from the tank. 4. Inspect O-ring seal (7) and replace it if it is worn or damaged.5. Perform Steps 2 and 3 in reverse order for installation procedure.Change the Pilot Filter
1. Remove the bolts and washers, and open the pump access door. 2. Clean the area to keep dirt out of the filter base.3. Remove the used element from filter base. This element cannot be reused.4. Clean the filter base.5. Coat the seal of a new filter with clean hydraulic oil and install it in the filter base. Tighten the filter hand tight.Change Drain Filters
Pump Drain Filter
Located on the right of the pilot filter. 1. Slowly loosen the air vent plug (indicated by an arrow) to relieve pressure from the filter. Tighten the plug.2. Remove the used element from the filter base. This element cannot be reused.3. Clean the filter base.4. Coat the seal of a new filter with clean hydraulic oil and install it in the filter base.5. Tighten the filter hand tight.Motor Drain Filter
Located on the right side of the hydraulic tank. 1. Slowly loosen the air vent plug (indicated by an arrow) to relieve the pressure from the filter. Tighten the plug.2. Remove the used element from the filter base. This element cannot be reused.3. Clean the filter base.4. Coat the seal of a new filter with clean hydraulic oil and install it in the filter base.5. Tighten the filter hand tight.After replacing return filter, pilot filter and/or drain filter, be sure to thoroughly remove air from each filter and lines. Purge the air from the system as follows.With the engine idling, loosen the air vent plug of each filter several