How To Maintain A HOWO 8x4 Truck Mounted Crane?
The HOWO 8x4 truck mounted crane is a core equipment for engineering transportation and hoisting operations, and scientific daily maintenance can effectively extend its service life, ensure operation safety and improve work efficiency. Here are the key maintenance points for this equipment, divided into daily inspection and regular professional maintenance, easy to operate and implement.
Daily Pre-operation & Post-operation Inspection
Complete basic checks before and after each use to eliminate potential risks in time, which is the foundation of equipment maintenance.
1. Check the structural parts: Inspect the boom, steel wire rope and hook for cracks, wear or deformation, and confirm the anti-drop device of the hook is intact. Tighten the loose bolts of the outrigger and boom connection parts in time.
2. Hydraulic system check: Observe the hydraulic oil level to keep it at the standard scale, and check the oil pipes, joints and oil cylinders for oil leakage. Start the equipment to test the boom's expansion and luffing actions, and ensure no abnormal noise or jamming in the hydraulic system.
3. Basic vehicle check: Verify tire pressure and braking performance, drain water from the air reservoir, and check the normal operation of lights and instruments to ensure the driving and operation safety of the whole vehicle.
Regular Lubrication Maintenance
Lubrication is the key to reducing wear of moving parts, and it is necessary to follow the specified cycle and position for refueling.
1. Key lubrication points: Add special grease to the boom hinge points, luffing cylinder nozzles every 60-80 working hours, and refuel the slewing bearing nozzles every 80-100 working hours (rotate the slewing table when refueling the ball bearing nozzles).
2. Lubrication of outriggers and booms: Fully extend the outriggers and boom, apply grease evenly on the contact surfaces of the outrigger sliding block, boom top wire and sliding rail to reduce friction during movement.
3. Use matching lubricants: Choose the grease and hydraulic oil specified by SINOTRUK for the HOWO series, and avoid mixing different types of oil to prevent oil quality deterioration.
Periodic Professional Maintenance
Carry out graded maintenance according to the working hours to deeply maintain the core components and eliminate hidden faults.
1. Short-term maintenance (2500-3000 working hours): Replace the engine oil, oil filter and air filter, clean the hydraulic oil filter, and check the tightness of the brake pipeline and the thickness of the brake lining. Inspect the steel wire rope for broken wires, and replace it in time if it does not meet the safety standards.
2. Long-term maintenance (5000-6000 working hours): Conduct a comprehensive disassembly and inspection of the hoisting mechanism and slewing reducer, clean the hydraulic components such as oil pumps and motors, and replace the aging sealing parts. Check the hydraulic oil quality; if it is emulsified or discolored, drain all the old oil and replace it with new oil of the corresponding grade (L-HM32 for winter, L-HM46 for summer).
Core Maintenance Notes
1. All maintenance operations must be carried out when the equipment is shut down, the engine is off and the handbrake is pulled up; the outriggers should be fully extended and supported during the maintenance of the boom and slewing mechanism to prevent rollover.
2. Use original or qualified accessories for replacement to avoid secondary failures caused by inferior parts.
3. Establish a maintenance account to record the time and content of each inspection and replacement, which is convenient for tracking the equipment status and formulating a targeted maintenance plan.
