|
Common Faults and
troubleshooting |
|
Order |
Fault phenomenon |
The cause of the malfunction |
Troubleshooting |
|
1 |
Skid brakes have a hook slide |
Braking torque is too small
Brake wheel and brake surface oil for too long |
Adjust brake pressure spring
Removal of small oil adjust brake clearance values watts |
|
2 |
The impact of excessive brake load |
Brake too quickly
Uneven brake shoe on both sides of gap |
Brake adjust the gap between the gate-watt or larger
liquid
Putting pressure trip |
|
3 |
Brake rotation process
Fever smoke
|
Brake-watt gate gap is too small |
Increased brake clearance watts |
|
4 |
Reducer temperature is too high |
Lack of lubrication or excessive |
Adequate attention to changes in fuel |
|
5 |
Reducer bearing temperature is too high |
Main are excessive or too little grease
Bad quality grease
Bearing axial clearance does not meet the requirements
Or damaged bearings |
By the replacement of grease and re-appropriate
Adjust bearing clearance bearing replacement |
|
6 |
Reducer oil |
Connecting parts fitting together noodle of Micronesia, and
Shaft seals damaged mill |
Replacement of seals |
|
7 |
Slewing mechanism can not start |
Watch whether or not the main foreign body stuck in gear, the
hydraulic coupling is too small oil-filled volume |
Clearly the appropriate foreign body come on |
|
8 |
The impact of large slewing mechanism fibrillation |
Hydraulic coupling may be excessive oil-filled |
Appropriate to reduce the volume of oil-filled |
|
9 |
Top or too slow |
1. Pump wear, reduced efficiency
2. E-mail less than oil or oil filter plugging
3. Manually reversing valve hole par with serious wear and tear
5. The fuel tank of the piston rod seal damage has occurred within the leakage |
Repair or replacement of defective parts, or add enough
oil
Cleaning Oil Filter |
|
10 |
Can not afford or can not be jacking jacking |
1. Pump serious in China
2. Stress relief valve is set too low
3. Spool manually reversing excessive wear
4. Relief Card Die |
Content by 6.4-conditioning replacement and repair |
|
11 |
Step-up occurs when jacking Noise and Vibration |
Oil filter plugging |
Cleaning Oil Filter |
|
12 |
Jacking system does not work |
Shift with the pump motor not turning |
Change the motor rotation to the |
|
13 |
Fibrillation occurs when the top or crawling |
1. The fuel tank of the air piston rod is not ranked in net
2. Oriented agencies have obstacles |
No-load exhaust repeated stretching |
|
14 |
After jacking the load has dropped from |
1. Cylinder head valve locks to malfunction
2. The fuel tank of the piston rod seal damaged |
Troubleshooting
Replacement of seals |
|
15 |
Luffing agencies should not start |
1. Control wiring error
2. Fuse blown
3. Motor phase winding short circuit, grounding and circuit
4. Electrical voltage is too low
5. Winding wiring error
6. Load transmission machinery is too large or there is failure |
1. Check the wiring diagram
2. Check fuse capacity is too small, such as
Small replacement of large
3. Measuring voltage
4. In accordance with various speeds to find short-circuit power supply,
Be restored in part short-circuit |
|
16 |
Luffing agencies have abnormal vibration noise
Too large |
1. Rotor with rub
2. Bearing serious damage to oil or less
3. Gear Wear
4. Two-phase operation, there is Xiao howling |
1. Check whether the uniform rotor gap
2. Cleaning bearings add new lubricants, replacement of bearings
3. Replacement gear box
4. To cut off power to check and repair |
|
17 |
Luffing body temperature rise too high electric motors
Or smoke |
1. Load and work continued non-compliance
2. Two-phase operation
3. Supply voltage too low or too high
4. Motor winding grounding or inter-phase short-circuit gate
5. Electric ventilation obstruction, temperature |
1. Determination of current such as greater than the
rated value to reduce the load
2. In accordance with the provisions of the load
3. Measurement of three-phase current and troubleshooting
4. To check the input voltage and to rectify
5. To identify the causes and repair
6. To maintain ventilation Road |
|
18 |
Luffing mechanism overheated bearings |
1. Bearings burned
3. Grease too much or too little |
1. The replacement of bearings
2. Add grease required |
|
19 |
Luffing agencies charged |
1. The power cord and grounding then mistake
2. Fuse blown
3. Abrasions grounding electrical wiring cited |
1. To identify and correct
2. Earthing contacts to good |
|
20 |
The total startup time is not action |
1. Operating handle not zero
2. Fuse blown
3. Start button, stop button bad |
1. Will handle zero
2. For insurance
3. Refresher or for button |
|
21 |
Lifting action tripping |
|
Check whether the brake lift-off test to open
Change the value of whether |
|
22 |
Luffing there is no 2-speed 1-speed |
1. Handle bad contact
2. Contactor contacts bad
3. Motor damage |
1. Refresher handle contact
2. Repaired or replaced contactor
3. Repairs or for motor |
|
23 |
Luffing there is no one-speed 2-speed |
1. Limit switch or contact exposure to bad
2. Motor damage |
1. Refresher or for limit switch
2. Repair or replacement of electrical |
|
24 |
Rotary brake does not work |
1. Brake switch bad
2. Rectifier bridge burned
3. Delay Relay Contact poor contact |
1. Refresher or for the brake switch
2. To replace or repair damaged components |
|
25 |
Electric hoists can not afford not to |
1. Input voltage is too low
2. AC contactor disconnected |
1. Check operating voltage, to ensure that not less than
the input voltage 360V
2. Access lines |
|
26 |
Motor over-temperature |
1. Operating frequency, too frequently
2. Low use of time is too long or lifting the brake did not open |
1. Should be appropriate to reduce the operating
frequency of
2. Check or braking effect |
|
27 |
Lifting non-action |
Console console peripheral component failure or an internal
electrical component failure |
To check the external components without failure or
console to check the internal electrical components |
