Views: 380 Author: Cindy Publish Time: 2023-12-20 Origin: Site
Carry-on crane transporter is a kind of mobile crane, which can lift the goods at any time, and is generally distinguished according to the tonnage. Some failures will inevitably occur when in use, below we list the common with truck crane crane failure and treatment.
Faults | Cause | Troubleshooting method |
| Telescopic cylinder vibration, telescopic boom crawling | 1 Air in the hydraulic system 2 Deteriorated parts in the telescopic cylinder 3 Dirt in the counterbalance valve 4 No lubricant in the boom | 1 Repeat the action several times to remove air from the system 2 Replacement of cylinder seals 3 Cleaning the balancing valve 4 Add lubrican |
No load, working speed is still too slow | 1 Suction pipe squashed 2 Air is sucked in through the suction pipe | 1 Replace the suction pipe 2 Tighten the suction pipe fitting |
| Expansion tubes do not expand in sequence | 1 Lack of lubricant 2 Bad slider 3 Faulty adjustment of telescopic arm valve | 1 Add lubricant 2 Change the slider 3 Adjust the telescopic arm |
Crane cannot lift rated weight | 1 Insufficient hydraulic pump power 2 Relief valve incorrectly set 3 Hydraulic pump seal damage | 1 Replace the hydraulic pump 2 Readjust relief valve pressure 3 Replace the hydraulic pump seal |
Automatic lowering of the boom after lifting the weight | 1 Damage to the piston seal of the luffing cylinder 2 Balance valve throttle port clogged with dirt or fatigue damage to the reset spring | 1 Replacement of cylinder seals 2 Clean the counterbalance valve and remove the dirt and replace the spring. |
Crane does not rotate correctly | 1 Vehicle exceeds maximum permissible tilt 2 Foreign matter in the rotary buffer valve 3 Rotary cylinder seal wear 4 Wear of the oil-free support sleeve in the gear post 5 System without power | 1 Restore the car to within the permissible tolerance 2 Clean or replace the rotary cushion valve 3 Replacement of the sealing ring 4 Replacement of oil-free support sleeve 5 Check the coupling of the extractor unit |
Joints or slewing squeaks | Lack of lubrication | Fill with lubricant at specified intervals |
Outrigger cylinders can't support the load | 1 Bidirectional hydraulic lock failure 2 Damaged outrigger cylinder piston seal | 1 Clean or replace the valve lock 2 Replacement of the sealing ring |
| Cylinder oil leakage, external leakage, internal leakage | 1 Deteriorated end cap seals 2 Piston seal wear | Replacement of seals |
Noisy, pressure fluctuation, hydraulic valve screaming | 1 Clogged suction pipe or suction screen 2 The viscosity of the oil is too high 3 Poor sealing of the suction port, air intake 4 Damaged pump parts 5 High system pressure | 1 Remove clogging dirt 2 Change hydraulic fluid as required or preheat with a heater 3 Replace seals and tighten screws 4 Replacement or repair of internal parts 5 Re-adjustment of system pressure |
Gap creep when winch is raised or lowered | 1 Wire rope knotted or disarranged on the reel 2 Brake friction pads damaged or with less than 80% friction area 3 Dirt in the lifting motor 4 Insufficient oil supply from oil pump, low system pressure | 1 Lower the wire rope all the way down to loosen it to remove the stress and rewind it. 2 Replace the friction plate repair and adjustment of the relevant parts to ensure that the friction area is greater than 80 per cent 3 Cleaning to remove dirt 4 check whether the oil pump is working properly, adjust the temperature and precision of the hydraulic oil, ensure the height of the oil tank level, and adjust the pressure of the safety valve to the appropriate value in the case of heavy lifting, the pressure can not reach, can replace the spring |
