Rebuild parts for mastervac brake booster

[GRJones]

Hi wondering if there's a source for this seal and or rod. 

 

Thanks.

[datzenmike]

Not from Nissan. The 620 Master Vac comes as an assembly. 

[GRJones]

Damn it's the only elusive part since starting this resto

[iceman510]

There are companies that rebuild them.  Friend of mine had his 240Z master vac rebuilt.  Maybe they can supply one.

 

I don't know who did his off the top of my head.

 

https://powerbrakes.com/

 

Edited February 17 by iceman510
addition

[GRJones]

Contacted powerbrakes and with shipping it's very expensive and it's not guaranteed to last. Is it that much harder to brake without one? Would an increased bore of the m/c help that much? I have long legs haha

Edited February 20 by GRJones

[datzenmike]

The brake booster on the 620 increases the master cylinder output pressure by about 50% over no booster. This means less leg work for better stopping. ANYTHING that reduces driver fatigue is a good thing.

 

A larger master cylinder will move more fluid but at the cost of higher foot pressure. Simply put you can't get something for nothing. 

 

Yes a larger diaphragm has more surface area for the vacuum to work on however the booster will have to be a larger diameter. There are clearance issues with the clutch master to it's left and the steering column below it. The 620 booster is already extended out from the firewall on a pedestal, more and it's in the way of the air filter. In a car the left strut tower is close to getting in the way.  

 

The 620 uses a 6" booster. The 710 and 610 do also.  I have one that's 6" so from a 620 or more likely a 710, I've had both.   

 

                                                                                                                                                                                                                   Hey I'm a little rusty but I still work.                                                        

[GRJones]

Here is the damage with mine. Everything else is in good shape.

 

3 cracks in the push rod seal. I could make my own possibly? rigid piece of rubber?

 

Solid on backside

 

I could jbweld the rod

[datzenmike]

What are the numbers on the seal? 10800???

 

Is this it?...

 

https://www.amazon.ca/Brake-Booster-Seal-46185-SE0-003-Compatible/dp/B0FH2N61Z7?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=A39PTXDE7CH91U

 

 

https://www.ebay.com/itm/375927577220

 

[GRJones]

3 numbers 58 221 and 10600. It's 33mm OD and 10mm ID

[datzenmike]

https://www.amazon.ca/s?k=Nissan+brake+booster+seal+replacement&crid=493HQWN88HCV&sprefix=nissan+brake+booster+seal+replacement%2Caps%2C191&ref=nb_sb_noss

 

For only $12 pick one and try it.