REMOVAL & INSTALLATION
Oil Bath Type
See Figure 1
Clean the element and replace the oil in the oil bath type air cleaner every 3,000 miles (4,800 km) or sooner in dusty areas.
Remove the air cleaner assembly from the vehicle and disassemble the various parts. Remove any rubber or plastic hoses that are connected to the air cleaner. Remove the oil from the oil cup and scrape out all the dirt inside and the bottom. Wash the cup with a safe solvent, such as kerosene. Refill the oil cup to the level mark with the same weight (SAE) oil as is being used in the engine at that particular time. If it is cold and you are using a light viscosity oil in the engine, use a light viscosity oil in the air filter. If you are using a heavier oil in the crankcase for warm weather, use the same, heavier oil in the oil bath air cleaner. Soak the filter element in the same safe solvent as the oil cup. Agitate the element thoroughly in the cleaning solution to remove all dirt particles. Dry the element thoroughly with compressed air. Reassemble the air cleaner assembly and reinstall it on the engine to the reverse order of disassembly and removal.Dry Type
See Figures 2 and 3
The element should be replaced at the recommended intervals shown in the Maintenance Intervals chart later in this section. If your truck is operated under severely dusty conditions or severe operating conditions, more frequent changes will certainly be necessary. Inspect the element at least twice a year. Early spring and early fall are always good times for inspection. Remove the element and check for any perforations or tears in the filter. Check the cleaner housing for signs of dirt or dust that may have leaked through the filter element or in through the snorkel tube. Position a droplight on one side of the element and look through the filter at the light. If no glow of light can be seen through the element material, replace the filter. If holes in the filter element are apparent or signs of dirt seepage through the filter are evident, replace the filter.AIR CLEANER ASSEMBLY
See Figures 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15
- Disconnect all hoses, ducts and vacuum tubes from the air cleaner assembly.
- Remove the top cover wing nut (two on the Land Cruiser) and grommet (if equipped). Most models will also utilize three or four side clips to further secure the top of the assembly, simply pull the wire tab and release the clip; in fact air cleaners on fuel injected engines are secured solely by means of clips (air box-to-cleaner housing). Remove the cover and lift out the filter element. On fuel injected engines, simply lift up on the air box and slide out the filter.
- Remove any side mount brackets and/or retaining bolts and lift off the air cleaner assembly. Remove only the lower filter housing box on fuel injected engines.
- Clean or replace the filter element as detailed previously. Wipe clean all surfaces of the air cleaner housing and cover. Check the condition of the mounting gasket and replace it if it appears worn or broken.
- Reposition the air cleaner assembly and install the mounting bracket and/or bolts.
- Reposition the filter element in the case and install the cover being careful not to overtighten the wingnut(s). On round-style cleaners (carbureted engines), be certain that the arrows on the cover lid and the snorkel match up properly.
Filter elements on fuel injected engines have a TOP and BOTTOM side, be sure they are inserted correctly.
- Reconnect all hoses, ductwork and vacuum lines.
Never operate the engine without the air filter element in place.AIR CLEANER ELEMENT
The element can, in most cases be replaced by removing the wingnut(s) and side clips as already detailed. Remember that on fuel injected engines the air box should not be removed, just lifted upward carefully until the element is accessible.
On certain Land Cruisers with diesel engines that utilize a cyclone-type air cleaner, there is also a dust cup that should be cleaned. It's underneath the regular air cleaner assembly and and can be opened just like the regular cleaner (sideclips!). Once the top is off, carefully clean out any dust or accumulated crud with a rag.Crankcase Ventilation Filter
See Figure 16
Certain models may also utilize a cleaner-mounted crankcase ventilation filter, if so, it should also be cleaned or replaced at the same time as the regular filter element. To replace the filter, remove the air cleaner top cover and pull the filter from its housing on the side of the cleaner assembly. Push a new filter into the housing and reinstall the cover. If the filter and plastic holder need replacement, remove the clip mounting the feeder tube to the cleaner housing and then remove the assembly from the air cleaner.