7 replies to this topic

[fuzzypumper]

Hi,
Can any of the brake experts here tell me how the pushrod can be dismatle and removed from the
the rest of this assembly shown below?

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•  P1180149 (Small).JPG   64.97K   32 downloads

[S pack]

Hi,
Can any of the brake experts here tell me how the pushrod can be dismatle and removed from the
the rest of this assembly shown below?

G/day fuzzypumper

There should be a slot in the bakelite housing that has a metal key in it, you have to remove this key to release the plunger assy.
Can't remember exactly where it is, may have to remove the diaphragm to find the slot.

Dave

[fuzzypumper]

Do you mean the slot in the first pic or the second?
Because I cant really see a key in the first slot , just the round shaft.

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•  P1180155 (Small).JPG   67.94K   25 downloads

[S pack]

Do you mean the slot in the first pic or the second?
Because I cant really see a key in the first slot , just the round shaft.

That looks like the correct slot in picture 1 but as you say there is no metal key in it. If that is the correct slot and the key is missing you should be able to withdraw the pushrod assy rearwards. Maybe its just the pushrod seal is sticking in the valve body bore. If the pushrod won't come out remove the diaphragm from the valve body and see if there is key slot in there.
It's been quite a while since I had a booster apart, memory is a bit hazy.


Note that the pushrod assy is not repairable, if worn it must be replaced with a new one. Though by now some clever person has probably come up with a way of replacing the rubber seal.

[fuzzypumper]

Well I definately cant find a key but then again the rod doesnt come out either.

[S pack]

Well I definately cant find a key but then again the rod doesnt come out either.

Looking carefully at the 1st pic of the slot it looks like the key is in there. The key is a flat piece of metal with a u shaped cut out to engage around the plunger shaft.

Hold the valve body assy in one hand with the slot facing down while pushing in the plunger assy, if the key is in there it should fall out and then the plunger assy will come out.

[fuzzypumper]

I still havent beean able to figure out how to remove the rod yet , more help needed.

I have also dismantled a VR double booster to remove the rod from which is bit different
but also cant figure out how to remove the spring & rubber rings from the rod either?

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[dattoman]

All I will say to you is "special tools"