BRAKES (CONTINUED)
SYMPTOM
PROBLEM: REMEDY
SIN GLE BRAKE DRAG GING
OR LOCKED
Bro ken in ter nal brake com po nent:
lo cate and re place bro ken
part.
Flat spot on cam roller or cam shaft:
re place and lu bri cate.
Im proper ad just ment:
ad just slack ad just ers.
Spi der bush ing or cam bracket bush ing bind ing:
lu bri cate or
re place bush ing.
Im proper lu bri ca tion:
lu bri cate per
Fig ure 4-1.
Worn brake shoe bush ing:
re place bush ing.
Brake drum dis tor tion:
re place drum.
Bro ken brake cham ber spring:
re place spring.
Brake cham ber pushrod bind ing:
re- align brake cham ber
bracket.
Air brake line loose or bro ken:
tighten or re pair.
UN EVEN BRAKES
See “SIN GLE BRAKE DRAG GING OR LOCKED”
Re stric tion in hose:
lo cate re stric tion and re move.
Worn brake lin ings:
re line brakes.
Grease on lin ings:
re line brakes.
Bro ken slack ad juster:
re place slack ad juster.
Leak ing brake cham ber dia phragm:
re place dia phragm.
BRAKES AP PLY TOO SLOWLY
Brakes need ad just ing or lu bri ca tion:
ad just or lu bri cate as
needed.
Low air pres sure in brake sys tem (be low 105 PSI):
check
trac tor air sys tem.
Re stricted tub ing or hose:
lo cate re stric tion and re move.
De fec tive re lay valve:
clean or re place.
Call Fac tory or see quali fied Trailer/Brake Tech ni cian
BRAKES RE LEASE TOO SLOWLY
Brakes need ad just ing or lu bri ca tion:
ad just or lu bri cate as
needed.
Brake rig ging bind ing:
align brakes or re place bent parts.
Ex haust port of re lay valve re stricted or plugged:
clean
valve.
Trac tor pres sure too low:
Ad just to pro vide 105 psi min.
ALL BRAKES DO NOT RE LEASE
Air sys tem im prop erly con nected to trac tor:
tighten or
ad just con nec tions.
Brake valve on trac tor is ap plied:
re lease brake.
Re lay emer gency valve in emer gency po si tion:
check line
pres sure and check valve.
Re stricted tub ing or line:
lo cate re stric tion and re move.
De fec tive trac tor pro tec tion valve:
trou ble shoot trac tor air
sys tem.
Park ing brakes locked:
trou ble shoot air sys tem.
Mois ture in air sys tem:
Check air sys tem
Trac tor pres sure too low:
Ad just to pro vide 105 psi min.
5-4
Summary of Contents for 318C
Page 3: ...MODELS 318C BOEING TRAILER OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO i...
Page 8: ......
Page 12: ......
Page 32: ...3 20 FIGURE 3 6 STEPS FOR LOADING AND UNLOADING...
Page 36: ...3 24 FIGURE 3 8 REAR IMPACT GUARD AND ANTILOCK BRAKE SYSTEM...
Page 52: ...4 14 FIGURE 4 6 CHECKING AXLE ALIGNMENT FIGURE 4 7 EXAMPLES OF CAMBER...
Page 56: ...4 18 FIGURE 4 10 AXLE AND BRAKE ASSEMBLY...
Page 64: ...4 26 FIGURE 4 16 MOUNTING TIRES AND WHEELS FIGURE 4 17 STUD TIGHTENING SEQUENCE...
Page 76: ...5 10 NOTES...
