Komatsu 830E-AC Shop Manual page 570

21. Fully stroke the brake pedal actuator to check
that output pressure at port "B1" and "B2" are
within specifications.
NOTE: If pedal is adjusted properly, the spring and
spring pivots will not interfere with pedal travel.
22. If pressure is not within specifications, re-adjust.
If pressure is within specifications, apply a few
drops of Locktite to the jam nut.
J3-16
23. Check internal leakage at port "T". Leakage
must be less than 100 cc/minute with the valve
in the released position and system pressure
supplied to the "P1" and "P2" inlet ports.
24. "T" port leakage must be less than 250 cc/
minute with valve pilot pressure or manual
applied.
Brake Circuit Component Service J03034