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Home > News > Industry News > Solutions of aerial platform t.....

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Solutions of aerial platform truck no engine braking

  • Author:Changjie
  • Release on :2016-09-07

Automatic transmission aerial platform truck without engine braking failure mainly as follows: In the process of moving aerial vehicles, when the shift lever is in the forward low gear (S bits, L bit) position, release the accelerator pedal, the engine speed to idle , but the car did not slow down significantly; aerial platform truck downhill when the shift lever is in the front to resist, but can not produce the engine braking effect.

Causes the automatic transmission aerial platform truck without engine braking are: 1 gear switch improperly adjusted. 2. Improper adjustment lever. 3.2 Forced stop brake or skid low gear and reverse gear brake slip. 4. Controlling engine brake solenoid valve is faulty. 5. The valve plate is faulty. 6. The automatic transmission skid. 7.ECU faulty.

Troubleshooting methods are as follows:
1. For automatic transmission, should be self-diagnostic, read the fault code. If a fault code is displayed, touch the displayed fault code to find the cause.
2. The road test to check whether the automatic transmission when the acceleration slippage. If you slip, you should overhaul automatic transmission.
3. If the shift lever is in no position S when the engine braking effect, but with the engine braking effect when the shift lever is located in the L level, indicating that block 2 forced brake skid, should overhaul automatic transmission.
4. If there is no shift lever is L-bit engine braking effect, but with the engine braking effect when the shift lever is in position S, indicating low gear and reverse gear brake skid, should overhaul automatic transmission.
5. Check Control Aerial platform truck brake solenoid circuit for short-circuit or open circuit, the solenoid valve coil resistance is normal; whether the work after power sound. If there is an exception, should be repaired or replaced.
6. Remove the valve plate assembly, clean all control valves. If there catching the spool can be refitted after polishing. If polishing is still jamming, replace the valve plate assembly.
7. Each pin voltage detection ECU. Pay particular attention to the pin voltage and throttle position sensor, switch gear connection, if there is abnormal, further examination should be done.
8. Replace a new ECU to try, if the fault disappears, indicating damage to the original ECU.