In order to make the forklift work normally and reliably, and to play the potential of the forklift, there must be frequent maintenance measures. Technical maintenance measures are generally:
1、Daily maintenance after work every day
2、Level 1 technical maintenance, after 100 hours of work, the working system is equivalent to 2 weeks.
3、Level 2 technical maintenance, after 500 hours of work, the working system is equivalent to three months.
1、 Daily maintenance
(1、Clean the dirt, dirt and scale on the forklift. The key parts are: forks and gantry slides, generators and starters, battery electrode forks, water tanks, air filters.
(2、Check the tightening of each part, the focus is: fork support, lifting chain tensioning screws, wheel screws, wheel fixing pins, brakes, steering gear screws.
(3、Check the reliability and flexibility of the foot brakes and steering gear.
(4、Check the leakage, the focus is: each pipe joint, diesel tank, oil tank, brake pump, lift cylinder, tilt cylinder, water tank, water pump, engine oil sump, torque converter, transmission, drive axle, final drive, Hydraulic steering gear, steering cylinder.
(5、Remove the oil filter deposit.
2、Level 1 Technical Maintenance Follow the "Daily maintenance" program and add the following work.
(1、Check cylinder pressure or vacuum.
(2、Check and adjust the valve clearance.
(3、Check that the thermostat is working properly.
(4、Check that the multi-way reversing valve, lift cylinder, tilt cylinder, steering cylinder and gear pump work normally.
(5、Check that the shifting of the transmission is working properly.
(6、Check and adjust the gap between the brake pads of the hand and foot brakes and the brake drum.
(7、Replace the oil in the oil pan, check that the crankcase ventilation pipe is intact, and clean the oil filter and the diesel filter element.
(8、Check that the generator and starter motor are installed firmly, and that the terminal is clean and secure, and check the carbon brush and commutator for wear.
(9、Check the tightness of the fan belt.
(10、Check that the wheel is installed securely, that the tire air pressure meets the requirements, and remove the debris embedded in the tread.
(11、Due to the maintenance work, the parts are disassembled and the forklift road test is carried out after reassembly.
（1） Braking performance under different degrees should be no deviation, meandering. On the steep slope, the hand brake can be stopped after being tightened.
（2） Listen to the engine running under acceleration, deceleration, heavy load or no load, with or without abnormal sound.
（3） After a mileage test, check the brakes, transmission, front axle housing, and gear pump for overheating.
（4） Whether the fork lift speed is normal and there is no tremor.
(12、Check the diesel tank oil inlet filter for blockage and damage, and clean or replace the filter.
3、Level 2 technical maintenance In addition to the maintenance of each project according to the first-level technology, the following work is added:
(1、Clean all fuel tanks, filters and pipelines, and check for corrosion and cracking. After cleaning, do not use fiber ends with cloth and wipe the cloth.
(2、Clean the torque converter, gearbox, check parts and wear new oil.
(3、Check the drive shaft bearings and change the direction of the universal joint cross shaft as needed.
(4、Check the fastening of each part of the drive axle and whether there is oil leakage or ventilating. Remove the main reducer, differential, and wheel reducer, adjust the axial clearance of the bearing, and add or replace the lubricant.
(5、Disassemble, adjust, and lubricate the front and rear hubs for half-axis transposition.
(6、Clean the brakes and adjust the gap between the brake drum and the brake shoes.
(7、Clean the steering gear and check the free rotation of the steering wheel.
(8、Remove and clean the gear oil pump, pay attention to the wear of the gears, housing and bearings.
(9、Remove the multi-way valve, check the clearance between the valve stem and the valve body, and do not open the safety valve if it is not necessary.
(10、Check the steering knuckle for damage and cracks, the cooperation between the kingpin of the steering axle and the steering knuckle, and disassemble the wear of the joints of the crossbar and the steering arm.
(11、Remove the tires, remove the rust and paint the rim, inspect the inner and outer tires and the belt, change the position and inflate according to the regulations.
(12、Check the connection and fastening of the hand brake mechanism and adjust the working stroke of the hand brake lever and the foot brake pedal.
(13、Check the battery's electro-hydraulic specific gravity. If it does not match the requirements, you must remove the charge.
(14、Clean the water tank and oil radiator.
(15、Check the shelf, the frame for deformation, the washing and unloading roller, whether the accessories are fixed reliably, and if necessary, add welding.
(16、Remove the lift cylinder, tilt the cylinder and steering cylinder, and replace the worn seal.
(17、Check each instrument sensor, fuse and various switches and adjust if necessary.