How to solve the foam fire truck transmission shaft imbalance failure?

Foam fire truck fault phenomenon When the universal joint and the telescopic fork are in good condition, a periodic sound is emitted during driving, and the higher the speed is, the louder the sound is. Even with the vibration of the body, the hand holding the steering wheel feels numb. Cause of failure: The balancer on the drive shaft comes off. The drive shaft is bent or the drive shaft tube is recessed. The drive shaft tube and the universal joint fork are not welded properly or the drive shaft has not been subjected to dynamic balance testing and calibration. The misalignment of the telescopic fork causes the joints at both ends of the drive shaft not to lie in the same plane and does not meet the condition of constant speed transmission.

Fault Diagnosis and Remedy: Check whether the driveshaft of foam fire truck is sunken. If there is a sag, the fault will cause the south; if there is no sag, it will continue to check. Check if the balance plate of the drive shaft tube falls off. If it falls off, the fault is caused by this; otherwise continue checking. Check that the telescopic fork is installed correctly. If it is not correct, the fault is caused by this; otherwise, continue inspection. Remove the propeller shaft for dynamic balance test. If the motion is unbalanced, it should be calibrated to eliminate the malfunction. If the bend should be straightened. How to assemble the drive shaft.

The method of installation of the drive shaft is as follows: Grease the foam fire truck universal joint bearings with grease or gear oil, match the oil seal, and put them on the cross shaft, press the front and rear drive shaft end joint yoke, telescopic clevis and flange respectively. Fork hole towel, then install the cover and lock ring, tighten and lock. Apply grease to the propeller shaft expansion sleeve, then place the fork on the spline shaft of the rear propeller shaft and tighten the oil seal cap. Connect the front drive shaft flange fork to the second shaft flange of the transmission, and install the front drive shaft on the middle support frame of the drive shaft. Then bolt the ten bytes on both ends of the rear drive shaft to the front drive shaft and On the flange of the rear axle driving gear shaft, tighten the flange fixing bolts and nuts. Transmission spline sheath and cross shaft nipple must.

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