Loosen the bolts of the hydraulic tank top plate assembly. Remove the return filter from tank top plate assembly. Install new return filter by hand. Remove the suction strainer from the tank. Install the new strainer by hand. Install the tank top plate assembly and fasten the bolts. Remove and discard the air breather. Install a new air breather. Start the engine and operate the hydraulic controls, 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 FULL mark on the dipstick/filter cap assembly. 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 wears. 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 Lift the mast and carriage enough for getting tension on lift chains. Measure precisely ten links of chain distance at the center of pins in millimeter. Calculate chain wear rate*. If the chain wears rate is 2% or more, replace the lift chain. Lift the carriage and the mast high enough for getting 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. If the tension is not the same on both chains, take the procedure as follows. Make sure that carriage height is correct. If correct, adjust the chain for equal tension. If not, adjust the chain for correct carriage height by adjusting anchor nuts (1), (2). 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 distance from bottom of inner upright to the bottom of carriage bearing. 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. 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 tension. 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. Universal Joint – Inspect Check for worn or damaged bearings. Have worn or damaged bearings replaced. Check for loose retaining bolts and nuts. Tighten the bolts and nuts, if necessary. 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 gasket between the air cleaner housing and the engine inlet. Replace the gasket if it is damaged. Remove the secondary element. Inspect the gasket 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 service 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 hoses that shows signs of swelling, cracking, abrasion or deterioration.