Remove and discard the air breather. Install a new air breather. Loosen the bolts of the hydraulic tank top plate assembly. Remove the return filter from tank top plate assembly. Change the return filter. Remove the suction strainer from the tank. Install a new strainer by hand. Install the tank top plate assembly and fasten the bolt. Start the engine and operate the hydraulic con- trols, and the steering system, through a few cycles to fill the lines. Look for oil leaks. Stop the engine and check the oil level. With all cylinders retracted, maintain the oil level to the FULLmark on the dip stick/filler cap assembly. See topic, “Engine Valve Lash (Diesel Engine Only) – Check, Adjust” in “First 250 Service Hours or a Month”. Inspect the part of the chain that is normally operated over the cross head roller. When the chain bends over the roller, the movement of the parts against each other causes wear. Inspect to be sure that chain link pins do not extend outside of the link hole. If any single link pin is extended beyond its connecting corresponding link, it should be suspected of being broken inside of its link hole. Lift chains are required to check for wear about every 1,000 service hours or 6 months. Chain wear test is a measurement of wear of the chain links and pins. Lift the mast and carriage enough for getting ten- sion on lift chains. Measure precisely ten links of chain distance at the center of pins in millimeter. Calculate chain wear rate*. If the chain wear rate is 2% or more, replace the lift chain. Lift the carriage and the mast high enough for get- ting tension on lift chains. Check the chains, and make sure the tension is the same. Lift chains are required to check for equal tension about every 1,000 service hours or 6 months. Fully lower the carriage and tilt mast forward or lift the carriage and put blocks under the carriage to release the tension from the lift chains. Loosen nut(1) and adjust nut(2) to get proper dis- tance from bottom of inner upright to the bottom of carriage bearing. Typical example for carriage chain of STD mast Typical example for carriage chain of FF,FFT mast Make adjustment anchor nut(1),(2) for equal chain tension. Set the mast vertical and raise the carriage and check equal chain tension. If not equal, repeat the same procedure as step 1 through step 3. 5. Put LOCTITE No. 242 Tread lock on the threads of the anchor nuts(1),(2) after the adjustment is completed. Make sure that mast height is correct. If correct, adjust chain for equal tension. If not, adjust mast chain for correct mast height by adjusting anchor nuts(3),(4). Lift the inner mast and put blocks under the inner mast to release the tension from the lift chains. Loosen nut(3) and adjust nut(4) to make inner mast rail flush with outer mast rail bottom. Make adjustment anchor nuts(3),(4) for equal chain tension. Raise the inner mast and check equal chain ten- sion. If not equal, repeat the same procedure as step 1 through step 3. Put LOCTITE No. 242 tread lock on the threads of the anchor nuts(3),(4) after the adjustment is completed. See topic, “Air Intake System - Check, Clean” in “Every 250 Service Hours or Monthly”. Remove the primary air cleaner element. See topic “Servicing Filter Element”. Clean the inside of the air cleaner housing and cover. Remove the secondary element. Inspect the gas- ket between the air cleaner housing and the engine inlet. Replace the gasket if it is damaged. Install a new secondary element. Install a new or cleaned primary element. Install the cover. Tighten the latches. Start the engine and observe the air cleaner ser- vice indicator. If the indicator shows RED after installing a new secondary element and a cleaned primary (outer) element, replace the cleaned primary filter with a new element. Stop the engine. Close the hood and seat assembly. Visually inspect coolant hoses and clamps. Remember to check the two coolant lines that connect to the pressure regulator/converter. Replace any hose that shows signs of swelling, cracking, abrasion or deterioration. (1) LP Regulator/Converter (2) Coolant hose Visually inspect the pressure regulator/converter housing for coolant leaks. Refer to the pressure regulator/converter section of the service manual if maintenance is required. Visually inspect fuel lines and fittings for physical damage. Replace as required. (1) Fuel line (2) LP mixer (3) Throttle Assembly Refer to the LP mixer section of the engine service manual for procedures. Visually inspect the throttle assembly motor housing for coking, cracks and missing cover-retaining clips. Repair and/or replace as necessary.