TM 5-3805-258-24-19506AIR SYSTEM ANDBRAKESSPECIFICATIONSEMERGENCY AND PARKING BRAKEADJUSTMENTWARNINGBefore making anytests or adjustments on the brskesystem, stopthe mechine on Ieval ground and lower thebucket to theground. Move tha control knob for the parkingbrake to the ON position. Put blocks in frontof andbehindthe wheels. Permit only one man on the machine. Keep allother personnel away fromthe machine. Never disconnectanyair or brakefluid Iinea in the brakesystem until allpressure is removed. Failure to remove thispressure willhave a sudden releaseof air or brakefluid under high pres-sure.This can cause injury to personnel. To remova thepressure fromthebrakesystem: Engage theparking brake.Stop the engine. Push on either brakepedal many times untiltharais no more brakaair pressure. When the air prassurehas been removed from theair circuit, therewill be no pres-surein the brakehydraulic circuit.1. Start the engine and let the air pressure go up to operatingrange.2. Move the controlknob for the parkingbrake to OFF (brakereleased)position, Stopthe engine.3. Removecotter (4) and pin (6).Removelever (7) from itashaft.4. Turnstarwheel(10) to get a clearance,betweenshoes(9)anddrum(8),of 0.25t 0.12mm (.010i .005in.)5. Loosen nut (2) and turn rod end (3) to getdimension(A) of . . . . . . . . . . . . . . . . 102 mm (4.oin,)6, Installlever(7), pin (6) and cotter(4),7. Use nut (5) to turn rod (1) until free movementbetween rodend (3) and lever (7) is removed.8. Tighten nut (2).9. Move the controlknob for the parkingbrake to ON (brakeengaged)positionand checkthe stroke [distance(B)].DoSteps1 through8 againif distance(B)ia more than. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.omm (.75in.)NOTE: The parkingbrakeis adjustedcorrectly if the machinecannot be moved in first sDeedforward.2-60
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