Lift out the forklift engine with a crane, take out the torque converter first, and then take out the entire forklift gearbox. Before disassembling, it is necessary to drain the forklift transmission oil first, then start to remove the upper cover of the gearbox, remove the forklift oil supply pump and check whether there is any damage. Then remove the front and rear clutch assemblies and check for damage and wear. If you need to replace them, you must replace them with new ones. Check and clean again, and then install the gearbox in sequence, and then install it on the forklift.
Forklift gearbox maintenance method:
1. In order to ensure the life of the mechanical parts and sealing elements of the hydraulic control oil circuit, control the normal pressure of the oil circuit.
2. Working oil The forklift of the automatic transmission type uses 6# hydraulic transmission oil and gearbox oil, and the manual transmission type is gear oil. Use the oil temperature of 70-95C, and the use time should not be too long after it is higher than 95C;
3. Clean and maintain the automatic gearbox. Under normal circumstances, it is necessary to replace the forklift forklift gearbox lubricating oil gearbox every six months for cleaning and maintenance;
4. The replacement and cleaning cycle of the oil filter of the forklift truck should be within 50h for the new car, every 200h, 1200h thereafter, and every 600h in special harsh environments;

5. When the forklift is driving and shifting, the micro-actuated valve should be closed first, and then shifted; when braking, the micro-actuated valve must be closed first and then braked to prevent clutch damage or brake failure.