Clutch master cylinder overhaul #5

Regarding the clutch master cylinder which I repaired the hole at piston with solder, one of my friend advised me that the solder might not be hard enough. Therefore, I tried the repair again in another way.

Disassembled the clutch master cylinder again.

Now I can do it very quickly because I disassembled brake master and clutch master cylinders many times J

Heated and removed the solder at the piston hole.

I used the soldering iron instead of the burner because I heard giving too much heat on piston should be avoided.

In this time, according to the advice from my friend, the repair method is to screw in the thread with strong adhesive into the hole, then grind the thread head to make the piston surface flat. In order to do it I bought bolts and a grinding stone at the hardware store.

Cutting the bolt to adjust the length to fit the hole depth.

Engrave the minus groove at the cut bolt head to make screwing in possible with minus screw driver.

It took time, but the result was not bad.

Paste the JB weld in the piston hole.

And screw in the cut bolt with minus screw driver.

Then, grind the bolt and piston with the grinding stone.

Using power drill,

Grind, grind, grind….

It took longer time than I expected to make the piston and bolt becoming flat. Steel is much harder than solder.

I reassembled the clutch master cylinder right away.

I believe finally the overhaul of my clutch master cylinder has finished!

(My original blog was written on 28th Jul. and 2nd Aug. 2009)

Comments

Tip to repair rubber parts

I disassembled the rear axle before. There had been no progress on it because I started the repair of the fuel tank during my summer holiday. While painting the fuel tank , I repaired the torn rubber boot of the parking brake wire. I guessed it didn ’ t cost high because it was small rubber part. But I wanted to try the repair method I read on the magazine article before. This was the condition before the repair. The rubber was torn apart and separated almost. I used this self-adhesive type butyl tape. I pasted lots of small pieces of the butyl tape on the back side of the rubber boot. As time goes by , these tapes would melt and stick together. After this I applied plenty of adhesive “ Super X Black ” on the rubber boot. On the magazine of MOTO MAINTENANCE , I read the article that the motorcycle seat was repaired with this method. So , I wanted to try it. After drying 1 day , it became like this....

Brake master cylinder overhaul #1

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Could engine start?! (The original blog was written on 6th Oct. 2007)

One week passed and a long-awaited weekend came. I changed the engine oil , Put the oil from the sparkplug holes and rotate the crank by hand , Tighten the idle adjust screws to the end and return 1 turn , At last I turned on the ignition praying the moment of the engine starting. After hearing the sound that the electric fuel pump sending the fuel , I pushed the gas pedal a few times then turned on the key … VROOOOOOOOM!!!!! The engine started with the first ignition!!!!! ☺︎☺︎☺︎ The engine revived for the first time in 10 years! YES!! I did it!!! I haven ’ t done the accurate adjustment , but the idling was stable and it seemed good. Tomorrow I would do the adjustment for the idling and throttle synchronization ♪

The day my "onboro ALFA" would revive

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