The following safety inspections must be performed every week or before each transport (whichever occurs first):
a Check tire pressure and adjust to the level recommended by the tire manufacturer;
b Check the tightness of tire screws;
c Check the brake system for air leaks and test whether it can brake;
d Check the tightness of all nuts, screws and bolts of the suspension;
e Check the brake connection of the tractor and semi-trailer;
f Drain the air tank and the air chamber equipped with air suspension;
g Check all lights;
h Check and ensure that the outriggers are working properly;
i Check the wear of moving parts;
a Check the tightness of all suspension parts (according to the torque data provided);
b Check for broken leaf springs;
c Check all brake system joints, hoses for damage, and hose clamps for missing;
d Check the proper operation of relay valves and other valves;
e Check the wear of the tie rod bushings;
f Check the brake drum for cracks or abnormal wear;
g Check the axle lubricant for leakage;
h Check all fasteners, especially those used for outriggers, tires, axles, etc. (in any case, nuts, screws and other fasteners should be tightened to the recommended torque parameters);
i Check the wear of the traction pin;
j Check whether the brakes are normal;
k Lubricate the outriggers and traction plates/traction pins;
l Lightly lubricate the brake camshaft and loosen the adjuster;
m Check whether the joints of the side wall panels, door panels, and top panels are debonded;
n Replace worn parts with parts produced or approved by regular companies.
After the vehicle is used for 6 months, a comprehensive inspection is carried out every 12 months to ensure the performance of the vehicle (including maintenance in the 6th month). The scope of inspection is the same as the monthly inspection mentioned above, and the following items are added:
a Remove the brake drum and thoroughly check the brake shoe for additional or improper wear;
b Check the brake shoe return spring, brake bushing, camshaft sleeve, brake shoe roller, etc. for damage;
c Check the bearings and axle connection parts;
d Thoroughly check the vehicle structure and report any problems immediately;
e Replace all worn or damaged parts with replacement parts recommended by the company.
5. Lubrication
In order to drive safely and extend the service life of the semi-trailer, grease must be added to each lubricating part regularly. When adding grease, pay attention to the following matters:
a The refueling device and the oil filling cup should be cleaned first.
b If the oil cup cannot be filled with grease, check the reason and replace it if it is damaged.
c Figure 5-1-1 is a diagram of grease replenishment for each part of the semi-trailer. The figure shows the grease adding position and refueling time, and requires the use of the grease brand (or similar variety) specified in the following table. For three-axle vehicles or single-axle vehicles, refer to the two-axle vehicle. For the grease brand of the axle and suspension, refer to the instruction manual of the axle and suspension.
