5000S Sedan L5-2226cc 2.22L SOHC (KZ) (1985)
Brake Pressure Regulator: Service and Repair
Adjusting
Brake Pressure Regulator, Adjusting
Work sequence
Car must be empty
Car must be on wheels (Bosch ramp)
Fuel tank full
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remove bleeder screw and connect adaptor to left front wheel brake caliper and right rear wheel brake cylinder
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connect gauge
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bleed both hoses and gauges with bleeder valve on gauges
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have person (approximately 165 lbs) sit on driver's seat
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bounce car several times at rear
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depress brake pedal firmly several times
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depress brake pedal until gauge on front axle reads 50 bar (725 psi)
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gauge for rear axle cylinder must read 32.5 - 42.5 bar (471 - 616 psi)
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increase brake pedal pressure until gauge on front axle reads 100 bar (1450 psi)
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gauge for rear axle cylinder must read 54.0 - 71.5 bar (783 - 1037 psi)
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if pressure at rear axle is too high, release spring tension by loosening and moving bolt
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if pressure is too low, tighten spring tension
CAUTION: Do not adjust pressure regulator with brake pedal depressed
use following test sequence:
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take pressure readings
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release brake pedal
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adjust spring
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depress pedal again
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take pressure readings
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if pressure cannot be adjusted replace regulator
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disconnect pressure gauges and bleed brakes