Isuzu N-Series. Manual — part 1325
88
89
Possible causes and characteristics of faults
Methods of check & elimination
渊1冤it爷s hard to turn or steering wheel cannot return smoothly
(a) Steering wheel shaft, sliding shaft or steering wheel
column deforms
(b) Universal joints loose or get stuck
(c) Bearing of steering wheel column does not rotate well
(d) Steering transmission shaft is not lubricated sufficiently
(e) Tyre pressure is too low
(a) Replace parts
(b) Replace universal joints
(c) Replace parts
(d) Add lubricant
(e) Inflate properly
渊2冤Steering wheel vibrates, steering operation is not sta鄄
ble
(a) Transmission shaft of the steering system looses
(b) Front wheel lose balance
(c) Tire shimmy is too great
(d) Disc grinding wheel damages
(e) Steering transmission shaft is abraded severely or the
clearance is too large
(a) Tighten properly
(b) Balance the wheel
(c) Correct shimmy
(d) Replace
(e) Replace parts
6. Faults of steering mechanism and elimination
Possible causes and characteristics of faults
Methods of check & elimination
渊3冤Front wheel deviates
(a) One of front wheel brakes sticks or shock absorber at
one side is invalid.
(b) Air pressure of one of the front tires is too low
(c) Reeds of leaf spring are misplaced or rupture
(d) Disc grinding wheel damages
(e) Toe-in of the front wheel is improper
(a) Adjust brake clearance or replace shock absorber
(b) Charge enough air
(c) Check front spring assembly
(d) Correct or replace
(e) Readjust
渊4冤Power steering pump leaks oil
(a) Oil seal or O-ring damages
(b) Lock nut or oil outlet plug of the oil seal damages
(a) Replace
(b) Repair
渊5冤Steering is heavy
(a) Steering gear fails
(b) Steering gear fails
(c) Pre-tightening force of the segment gear shaft
bearing is improper
(a) Replace plug components
(b) Measure output pressure of the pump, replace the
gear if necessary
(c) Adjust pre-tightening force of the segment gear shaft bearing
HFC1045
series trucks
90
91
Possible causes and characteristics of faults
Methods of check & elimination
(a) Clearance between shoe slice and drum of the parking
brake is too large
(b) There is oil dirt on brake drum and shoe slice
(c) Friction disc is over worn
(d) Parking brake cable is not adjusted and comes off;
clip spring is not installed
(a) Both upper and lower clearance should be adjusted
to 0.65mm
(b) Clean
(c) Replace
(d) Adjust, weld the joints properly, install clip spring
7.Parking brake is ineffective and relative elimination
8.Fault of service brake and elimination
Possible causes and characteristics of faults
Methods of check & elimination
渊2冤Brake efficiency is not good
(a) Air pressure is insufficient
(b) Free stroke of pedal is too long
(c) Clearance between brake drum and shoe slice is too
large
(a) Check or replace air pump, check the pipeline for leak
(b) Adjust to 8-12mm
(c) Adjust
渊1冤Service brake is ineffective
(a) Brake hose or pipeline ruptures
(b) Master cylinder valve of the brake is invalid
(a) Repair or replace
(b) Check & repair or replace
HFC1045
series trucks
92
93
Possible causes and characteristics of faults
Methods of check & elimination
渊4冤Brake drum heats
(a)Clearance between brake drum and shoe slice is too
small
(b) Return spring of the brake shoe slice ruptures or is
invalid
(a)Adjust
(b) Replace
渊3冤Brake deviates
(a) Clearances between brake drum and brake shoe slice
of each wheel are different from each other
(b) Brake drum distorts
(c) There is oil dirt on the brake drum or brake shoe slice
(d) Air pressures of tyres are not uniform
(e) Return spring of brake shoe slice ruptures
(f) Frame twists, front suspension is misplaced, front
wheel alignment angle changes
(a) Adjust the clearances to be uniform
(b) Replace
(c) After washing with petrol or buck, polish the shoe
slice with abrasive cloth
(d) Inflate according to specification
(e) Replace
(f) Correct, replace and take corresponding measures
Possible causes and characteristics of faults
Methods of check & elimination
(1) Tyres are exceedingly worn
(a) Tyre pressure is too low or too high
(b) Overload is too much or the loading is uneven.
(c) Wheel hub bearing looses
(d) Toe-ins of the front wheel are incorrect
(e) Emergency braking, sudden start, too frequent
speedup
(f) Interchanging of tyre crossly is not done
(a) Inflate according to specification
(b) Load according to specification
(c) Adjust
(d) Adjust to 4-6mm (diagonal tyre), 1-3mm (radial ply
tyre)
(e) Drive at a steady speed and do not drive too fast
(f) Interchange tyres crossly on scheduled date.
9. Wheel faults and elimination
HFC1045
series trucks
95
Possible causes and characteristics of faults
Methods of check & elimination
渊3冤Shock absorption is not very effective
(a) Lacking in shock absorber fluid
(b) Scheduled maintenance is not done
(c) Rubber rings damage
(a) Fill according to specification
(b) Scheduled maintenance should be done
(c) Replace
渊1冤Leaf spring breaks off
(a) The loading is too heavy or off position
(b) Emergency braking is applied too frequent, or speed
on uneven road is too high.
(c) U-bolts loose, armor plate clips loose or break
(d) Shock absorber is ineffective
(a)Load according to specification and arrange loads
reasonably.
(b) Concentrate on driving and avoid emergency braking
as possible as you can, lower the speed on uneven road
(c) Tighten U-bolts, armor plate clips or replace armor
plate clips
(d) Check & repair or replace
渊2冤There is
Check and replace fault rubber parts fro suspension sys鄄
tem
10. Faults of suspension mechanism and elimination
94
11. Faults of electrical parts and fault elimination
Possible causes and characteristics of faults
Methods of check & elimination
渊1冤The horn sounds continuously
(a) Connection is incorrect
(b) Some wire grounds and the spring is invalid
(a) Check and reconnect
(b) Remove, check and replace
渊2冤Capacity of electricity is insufficient
(a) new accumulator is not charged and discharged for
circulation and is not charged to rated quantity
(b) Generator cannot be charged or charged completely
(c) Pole plate damages
(d) Electrolyte level is too low or specific gravity is improper
(a) Charge sufficient electricity
(b) Check and repair the joints to eliminate faults
(c) Check and repair
(d) Add electrolyte and charge the accumulator with it re鄄
moved from the vehicle
HFC1045
series trucks
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст