TANK & FILTER GP-HYDRAULIC 1427671 - 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.Engine Air Intake System
Clean, Replace Elements And Precleaner
1. Check the air inlet screen and precleaner for accumulation of trash and dirt.2. Remove screen and clean.3. Inspect the precleaner tubes for accumulation of dust and dirt. Clean with pressure air, if necessary.Service Filter Elements
Service the air cleaner only with the engine stopped. Engine damage could result.
Service the air cleaner if the yellow piston in the filter element indicator moves into the red zone with the engine running at high idle. Stop the engine.Service Primary Element
1. Remove the access cover. 2. Remove air cleaner cover (1).3. Remove primary filter element (2) from the air cleaner housing. 4. Clean the inside of the air cleaner housing.5. Clean and inspect the primary element. See Cleaning Primary Elements.6. Install a clean primary element.7. Clean and install the cover. Tighten the cover bolts finger tight only. Do not use a tool to tighten the bolts.8. Install the access cover.If the yellow piston in the filter element indicator moves into the red zone after starting the engine, or the exhaust smoke is still black after installation of a clean primary filter element, install a new primary filter element.The primary element should be replaced after being cleaned a maximum of six times. Replace the element once a year even though it has not been cleaned six times.Replace Secondary Element
Always replace the secondary filter element. Never attempt to reuse it by cleaning.The secondary filter element should be replaced at the time the primary element is serviced for the third time.The secondary filter element should also be replaced if the yellow piston in the filter element indicator enters the red zone after installation of a clean primary element, or if the exhaust smoke is still black.
1. Remove the access cover. 2. Remove the housing cover and the primary element. 3. Remove the bolts that hold the secondary filter element to the housing. Remove the secondary element.4. Cover the air inlet opening. Clean the inside of the air cleaner housing.5. Inspect the gasket between the air inlet pipe and the housing. Replace it if it is damaged.6. Uncover the air inlet opening. Install a new secondary element.7. Install the nuts and washers on the studs. Tighten the nuts to a torque of 27 7 N m (20 5 lb ft).8. Install the primary element and cover. Tighten the cover bolts finger tight only. Do not use a tool to tighten the cover bolts.9. Install the access cover.Cleaning Primary Elements
Do not clean the filter elements by bumping or tapping them. Do not use filter elements with damaged pleats, gaskets or seals. Engine damage can result.Make sure the cleaned filter elements are completely dry before installing into the filter housing. Water remaining in the elements can cause false indications of contamination in Scheduled Oil Sampling test results.
Filter elements can be cleaned with pressure air -