Operate lift truck a few minutes to warm oil. Park the lift truck with the forks lowered, parking brake applied, Transmission in neutral and the engine stopped. Raise rear of lift truck off ground and block securely. Remove the crankcase drain plug and allow oil to drain. Clean and install drain plug. Remove and discard oil filter element. Wipe sealing surface of oil filter element mount- ing base. Make sure the entire old gasket is removed. Before installing a new filter element, apply a small amount of clean engine oil to the filter ele- ment gasket. Install the new filter element. When the gasket contacts the base, tighten it 11/4 of a turn more. Do not overtighten. Raise the lift truck, remove the blocking and lower the lift truck. Raise the hood and seat assembly. Fill the crankcase. See “Refill Capacities”. Start the engine and allow the oil to fill the filter and passages. Check for oil leaks. Stop the engine and measure the oil level. Maintain the oil level between the MAX. and MIN. marks on dip stick. Close hood and seat assembly. Remove drain plug (1). Allow the oil to drain into a suitable container. Clean the magnetic drain plug. Check O-ring seal and replace if necessary. Remove the spring and the strainer. Wash the strainer assembly in clean, nonflammable solvent and dry it. Install the strainer assembly. Remove the floor mat and the floor plate. Remove and discard the oil filter. Wipe off the filter base. Make certain that all of the old seal is removed. Apply a small amount of clean oil on the seal of the new filter. Install the filter by hand. When the filter contacts the base, tighten an additional 3/4 turn. Remove the dip stick/filter cap. Fill the compartment with oil. See “Refill Capacities”. Install the dip stick/filter cap. Start the engine. With the service brake applied and engine at low idle, shift the direction control lever to forward and reverse to fill the clutches. Shift the direction control lever into NEUTRAL. Engage the parking brake. Remove the dip stick/filter cap. Observe the oil level. Maintain the oil level between the Min and Max marks on the dip stick/filter cap. When the oil temperature is 40°C approximately, the cold side mark on the dipstick is applicable. When the oil temperature is 80°C approximately, the hot side mark on the dipstick is applicable. Check for oil leaks at the filters and drain plug”. Stop the engine. Install the floor mat and floor plate. Park the lift truck on a level surface. Apply the parking brake. Place the directional control lever in NEUTRAL. Raise the carriage high enough to access the drain plug and level/fill plug. Block the bottom of the mast with a block of wood to hold the carriage in the raised position. Turn the ignition switch OFF. Place an appropriate container under the axle to catch the oil as it drains. Remove the drain plug and the level/fill plug. Allow the oil to drain completely out. Discard the old oil according to federal, state, and local regulations. Clean and reinstall the drain plug. Add sufficient fresh oil through the level/fill open- ing until it reaches the bottom of the hole. See the section Lubricant Viscosities and Refill Capacities for the type and amount of oil to use. Clean and reinstall the level/fill plug. Remove the wood blocking and lower the carriage. Operate the lift truck for a few minutes and check oil level again. See the topic, “Drive Axle Oil Level - Check” in “Every 250 Service Hours or Monthly” section. Pick up capacity load and drive over to a 15% grade. Remove your thumb from the release button. The lever should resist movement when pulled fully back and a clicking sound should be heard. The lever should remain fully back until you press the release button with your thumb. Engage the parking brake and slowly release the service brake. Engage the parking brake and shift the transmission to NEUTRAL. Slowly release the service brakes. The parking brake adjustment is proper if it holds the lift truck on the grade. The parking brake needs adjusting if it does not hold the lift truck on the grade. If the lift truck starts to move in reverse down the grade with the parking brake engaged, stop it with the service brakes, disengage the parking brake and reverse slowly down the grade controlling your speed with the service brakes. Park the lift truck on a level surface, lowered the forks, shift the transmission to NEUTRAL and shut OFF the engine and block the wheels securely. Chock the lift truck's tires to prevent unintentional movement. Remove the floor mat and floor plate. Make sure the parking brake lever is released. Make sure the brake lever (1) is held against stop pin (2). If the brake lever (1) is held against the stop pin (2), go to step 7. If the brake lever (1) is NOT held against the stop pin (2), go to step 6. Remove the pin (3) and the cotter pin (4). Tighten the nut (6) to compress the spring (7) further and pull downward and turn the clevis (5) until the pin (3) fits into the brake lever when the lever (1) is held against the stop pin (2). Then install the pin (3) and the cotter pin (4) and return the nut (6) to the clevis (5). Loosen lock nut (5). Tighten screw (6) to 6 to 7 N•m (50 to 60 lb•in). Loosen the screw (6) 1 1/6 turns and tighten the lock nut (5). Reinstall the floor plate and floor mat Engage the parking brake, remove the tire chocks and test the parking brake. Refer to ‘Parking Brake Testing’ in the preceding section. Turn the knob(1) clockwise to increase the lever’s tension or counterclockwise to decrease it Adjustment is correct when the lever requires an effort 196 to 245 N.m (20 to 25 kgf.m) [142 to 178 lbf.ft]. If it is difficult to get the desired lever’s tension by the knob control, you can get it by locating the middle of the cable bolt thread. At the front of the bracket(2) : increase the lever’s tension. At the rear of the bracket(2) : decrease the lever’s tension. The distance(3) must be sustained. Do not adjust it freely. If you cannot get the sufficient perfor- mance of parking by above two steps, please contact DOOSAN lift truck service personnel.