[YANMAR] Repair and restore the mini backhoe Vio30-6. 

0:00
Hello, this time we will repair the YANMAR mini backhoe Vio30-6 type. The hydraulic hose is torn, and when the engine is started, the hydraulic oil blows out.
0:42
Hydraulic hoses on the "quick hitch" that facilitates bucket changes are damaged.
1:05
Since it is difficult to produce a hydraulic hose of this thinness, we will use genuine parts.
1:38
Oil is leaking from the boom cylinder rod cover.
1:46
The bottom plate of the bucket is worn and bent.
2:01
Hydraulic hoses are damaged due to deterioration and vibration.
2:47
Support and remove the boom cylinder.
3:22
Make a matching mark with a punch and use it as a guide when tightening.
4:10
The lock nut is processed to stop rotation, and a thin metal plate on the screw thread prevents it from loosening.
4:15
The piston plays a role in separating the hydraulic pressure during extension and contraction, because the double-acting hydraulic cylinder changes the direction in which the hydraulic pressure is applied.
4:20
In this machine, only the boom cylinder is equipped with a cushion, which acts as a resistance to the flow of hydraulic oil in the final stage when the boom cylinder is extended, and reduces the impact. Without this cushion, the impact of the boom cylinder would bend backwards.
4:29
The rod cover consists of multiple seals that prevent hydraulic pressure inside the cylinder from leaking to the outside, dust seals that prevent foreign matter from entering the cylinder, and bushings that center the rod.
6:36
I was able to remove the bush by heating the rod cover with acetylene gas.
6:59
The shape of the decompression seal is different, but when I checked it, I found that there was no problem with the function.
15:23
If the gap between iron materials is large, place a welding rod between them and weld from above to fill the gap easily.
16:09
The bucket has been painted and is in a strong state, thank you for watching 👍
Details are in the summary column
#Restoration
#yanmar

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