The Common Faults of 4×2 Truck-mounted Crane And Handling Methods

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.

Fault phenomenon: telescopic cylinder vibration, telescopic arm crawling

Fault causes:

1) air in the hydraulic system

2) telescopic cylinder seals aging

3)There is dirt in the balance valve

4) boom without lubricant

Troubleshooting method:

1) Repeat the action several times to eliminate the air in the system.

2)Replace the cylinder seals

3)Clean the balance valve

4) Add lubricating oil

Fault phenomenon: the telescopic arm can not be retracted in sequence

Fault causes:

1) lack of lubricating oil

2)The slider is broken

3) telescopic arm valve adjustment problems

Troubleshooting method:

1) add lubricating oil

2)Change the slider

3)Adjust the telescopic arm valve

Failure phenomenon: after lifting the weight of the boom automatically dropped

Fault causes:

1) Damage to the piston seal of the luffing cylinder.

2) The throttle port of the balance valve is clogged with dirt or the reset spring is damaged by fatigue.

Troubleshooting method:

1) Replace the cylinder seal

2)Clean the balance valve and remove the dirt and replace the spring.

Fault phenomenon: oil leakage from the cylinder, external leakage, internal leakage

Fault cause:

1) end cover seal aging damage

2) piston seal wear

Troubleshooting method:

Replace the seals