5-4
BRAKE DRUMS
For main te nance pro ce dures see
SYMPTOM
PROBLEM: REMEDY
EX CES SIVE LOSS OF BRAKES
OR FAD ING
Over heated brake drums:
check for de fec tive or mis ad justed
brake lin ings, dis torted or over- machined drums. Also check for
op er at ing con di tions or loads that cre ate se vere or ex ces sive
brake ap pli ca tions.
BRAKES PULL TO EI THER SIDE
Drums of dif fer ent di ame ters:
re place with drums of same di -
ame ter.
For eign mat ter in drums:
clean drums out.
ROUGH OR NOISY BRAK ING AC -
TION
De fec tive drums:
pull drums and in spect for any of the fol low -
ing; Heat spot ted drums, grease spot ting, blue drums, scored
drums, ex ces sive wear at rivet holes or edges, pol ished drums,
out of round drums, un bal anced drums, worn/dam aged brake
com po nents, for eign mat ter in drums. Cor rect situa tion or re -
place de fec tive part(s).
VI BRA TION IN RIDE
De fec tive drums or out- of- round:
re place drums.
Out- of- balance drums:
bal ance drums.
5-5
HY DRAU LIC SYS TEM
Most hy drau lic sys tem fail ures fol low the same pat tern: a grad ual or sud den loss of pres sure or
flow with a re sult ing loss of cyl in der or mo tor power. Any one of the sys tem’s com po nents may be at
fault. By fol low ing step- by- step pro ce dures, the trou ble can be lo cated in a short time.
SYMPTOM
PROBLEM: REMEDY
SYS TEM IN OP ERA TIVE
Not enough oil in sys tem:
fill, check for leaks.
Wrong oil in sys tem:
change oil, see speci fi ca tions.
Fil ter dirty or clogged:
drain oil and re place fil ter.
Hy drau lic lines dirty or col lapsed:
clean or re place as nec es -
sary.
Air leaks in pump suc tion line:
re pair or re place as nec es -
sary.
Worn or dirty pump: clean, re pair or re place.
Check for con -
tami nated oil. Drain and flush.
Badly worn com po nents:
ex am ine for in ter nal leak age. Re -
place
faulty com po nents. Check for cause of wear.
Leak age:
check all com po nents, and re lief valve for proper set -
tings.
Ex ces sive load:
check unit speci fi ca tions for load lim its.
Slip ping or bro ken pump drive:
re pair or re place cou plings.
Check for align ment.
5-6
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...
