15-315-3TX / TXH / TXB 180S - 400L (Rev. 4/23/07)TX / TXH / TXB 180S - 400L (Rev. 4/23/07)
periodically (refer to theperiodically (refer to the Preventive MaintenancePreventive Maintenance
chart in thechart in the AppendicesAppendicesfor parking brake liningsfor parking brake linings
wear inspection wear inspection interval). interval). The parking The parking brake lin-brake lin-
ings should be replaced when the thickness of theings should be replaced when the thickness of the
brake lining friction material is .031 inch (.8 mm) orbrake lining friction material is .031 inch (.8 mm) or
less. less. The parking The parking brake linings brake linings must be must be replacedreplaced
in pairs. in pairs. Perform the Perform the following procedures following procedures toto
replace the parking brake linings:replace the parking brake linings:
Death or serious injury couldDeath or serious injury could
result from result from a runaway truck. a runaway truck. Park the truck Park the truck onon
a hard, level surface, block the wheels in botha hard, level surface, block the wheels in both
directions to prevent movement, and Lock Outdirections to prevent movement, and Lock Out
the wheels of the truck in both directions,the wheels of the truck in both directions,
place the parking brake in the released posi-place the parking brake in the released posi-
tion and Lock Out &Tag Out the truck.tion and Lock Out &Tag Out the truck.
2.2. RemRemove ove pluplug (5g (5) an) and sd screcrew (w (17)17)..
3.3. WitWith the pah the parkirking brang brake relke releaseased, loed, looseosen then the
coupling nut (27) and back off setscrew (6)coupling nut (27) and back off setscrew (6)
until end of piston (12) is flush with theuntil end of piston (12) is flush with the
exposed end of piston (9).exposed end of piston (9).
4.4. AppApply thly the parke parking bring brakeake, Loc, Lock Out &Tk Out &Tag Outag Out
the truck, and remove the worn brake liningthe truck, and remove the worn brake lining
carrier assemblies (19).carrier assemblies (19).
5.5. InsInstaltall new bral new brake linke lining caing carrirrier asser assembemblielies.s.
Illustration 15-4.
Illustration 15-4. Parking Parking Brake Brake AssemblyAssembly
6.6. InsInstaltall scrl screw (1ew (17) in7) into toto torqurque plae plate (1te (1) and) and
thread it into thread it into the nuts the nuts (18). (18). Tighten the nutsTighten the nuts
(18) against each other to a torque value of(18) against each other to a torque value of
30 35 ft lbs (41 48 N30 35 ft lbs (41 48 N m)m)
a hard, level surface, block the wheels in botha hard, level surface, block the wheels in both
directions to prevent movement, and Lock Outdirections to prevent movement, and Lock Out
& Tag Out the truck.& Tag Out the truck.
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