31 the 215-8 excavator is suddenly unable to walk   

The fault can not walk suddenly appeared a customer machine during the walk.

Firstly, we analyze the possible causes are: lack of engine power transmission, clutch slipping, hang on the block or damaged, upper and lower transmission box failure, the shaft or the universal joint, and the main driving car broken before and after ablation or damage, the brake cylinder and the brake spring can not return and the brake hub lock.

Then one by one investigation according to the analysis of reasons: first, start the engine, listen to their voice, see the smoke color and oil pressure are normal; drive gear meshing box; the hydraulic pump starts to work; gear control of hydraulic system of the stem, the actuator can work normally, but also a strong driving force; the front wheel and a rear wheel respectively. Apart from the ground, when the wheels rotate flexibly; the transmission cover is opened, the gear lubrication is good, flexible rotation; remove the drive shafts of the upper and lower transmission box; and then start the engine, found in the hanging 1 block, connecting the upper and lower transmission box uppertransmission deflection of box output shaft have a large, but also speed up slow down, do the inspection found that the output shaft of the sway momentum especially. Judging from the machine drive bearing box output shaft damage; transmission box and driven bevel gear meshing is not normal to The machine can't get enough power and can't run. After opening the moving box, it can see that the rolling bearing is completely broken. But when it is replaced with the same type of new bearing, the excavator can't walk when it is tested.

Finally, we will be apart from the ground and lift the rear wheel, front axle connection, hanging 1 block can rotate continuously. The rear wheel that removed under the gear box is connected with a rear axle drive shaft, the hand brake and the front axle is connected, under normal circumstances, the output shaft of the transmission case at this time should not move, but we gently with the rod can be pulled off the output shaft of the transmission case, a gear box output shaft spline wear or disk flowers on the keyway damage. Remove the output shaft, the spline shaft and the driven cone meshing has been removed, the driven cone meshing slip on the shaft, so that power cannot be delivered.

After changing the same type of output shaft, the work of the machine is restored to normal.

Conscientiously, in time, based on the requirements of the customer, this is the service standard for the maintenance personnel of the engineering machinery.