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#1 |
Moderator
![]() Join Date: Aug 2017
Location: Cabarrus
Posts: 417
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Re: Bosch Hydromax brake booster info
Got called off work Friday so used my free day to swap in the 1.75" bore master cylinder. After carefully measuring push rod depths we needed to put a .055" spacer between the master and booster to be flush. I used 4 lock washers that measured .080" leaving me with .025" before the pushrod touches. A gallon of brake fluid later she was ready to for the road...
It felt more or less the same, had slightly better pedal travel and more control over braking force. Not sure if it was worth the hassle of swapping but oh well. 1st pic is 1.75" master 2nd pic is 2" master still installed 3rd pics is hydroboost pushrod 4th pic is pushrod side view 5th pic shows lock washer "spacers" installed circled in red
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Alex 1967 C50 292ci Lumber truck 1967 C50 292ci Dump truck 1967 C60 366ci Fire truck Last edited by CarolinaHD; 08-08-2020 at 08:11 PM. |
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#2 |
Registered User
![]() Join Date: May 2013
Location: Greenwood, IN
Posts: 376
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Re: Bosch Hydromax brake booster info
Alex,
Thanks for putting more work into it! I'm glad that it got slightly better for you. Do you believe the truck is safely driveable? Better braking performance than the original brake system? |
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#3 |
Moderator
![]() Join Date: Aug 2017
Location: Cabarrus
Posts: 417
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Re: Bosch Hydromax brake booster info
Considering the old one didnt work at all I'd say it's pretty good
![]() On a real note I dont have anything to compare it to so I'm not really sure. There was a point coming down a steep hill where I was fully on the brakes and it didnt stop as quickly as I would have liked. Might need to increase the pressure going to the rear line but I cant much more before it locks up. If I can't get this thing to stop how I want it, then I'll follow Richard's lead and ream out the front axle for the disc brake conversion. The end game is to make it into a dump truck or pull around a 20k lbs dump trailer so the brakes have to be dang near perfect.
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Alex 1967 C50 292ci Lumber truck 1967 C50 292ci Dump truck 1967 C60 366ci Fire truck |
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c40, c50 1967 1972 hydroboost, c5500, c60, conversion, kodiak, topkick |
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