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ABS HydroMax Braking System - Vacuum Boost, It Sucks
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Brake Booster
ABS HydroMax Braking System - Vacuum Boost, It Sucks
Better Clamping With Hydraulics
By
Brandan Gillogly
, Photography by
Brandan Gillogly
Truckin Magazine
,
January, 2010
The booster is mounted through the firewall with four bolts. Junior had no problem getting a socket and extension on them.
The booster is mounted through the firewall with four bolts. Junior had no problem getting
The Hydro Max unit used the same master cylinder, but the billet aluminum booster is much more compact than the vacuum unit.
The Hydro Max unit used the same master cylinder, but the billet aluminum booster is much
Looking at the bottom of the booster, the high-pressure feed line is on the left, near the firewall. The larger port on the right is the low-pressure return line.
Looking at the bottom of the booster, the high-pressure feed line is on the left, near the
The guys at ABS fabricated a firewall mounting plate out of 3/16-inch steel and bolted the booster/master cylinder assembly to the firewall.
The guys at ABS fabricated a firewall mounting plate out of 3/16-inch steel and bolted the
Back under the dash, Junior reconnected the brake pedal and brake light switch.
One fitting was removed from the power steering box. Here's a shot looking straight down from the driver side fender.
One fitting was removed from the power steering box. Here's a shot looking straight down f
A high-pressure hydraulic fitting was tightened into the port on the steering box and routed to the port on the booster closest to the firewall. The barbed fitting that's pointing down is the return line.
A high-pressure hydraulic fitting was tightened into the port on the steering box and rout
The flare was cut off of the factory power steering return line to accept the return line from the booster.
The flare was cut off of the factory power steering return line to accept the return line
Next Junior topped off the new master cylinder and bled the brakes.
After topping off the power steering reservoir with new ATF, Junior bled the booster. That's a geyser of ATF coming from the valve.
After topping off the power steering reservoir with new ATF, Junior bled the booster. That
The final check of the brake pressure gave us 200 psi with the engine off, and 1,800 psi when boosted. That's twice the clamping force!
The final check of the brake pressure gave us 200 psi with the engine off, and 1,800 psi w
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By
Brandan Gillogly
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