JAC Trucks. Service manual — part 123
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
96
97
Possible causes and characteristics of faults
Methods of check & elimination
渊3冤Electrolyte of the accumulator is consumed too quickly
(a) Quantity of charging and discharging electricity is too
great; electrolyte vaporizes or overflows.
(b) Some part of the accumulator leaks
(c) Partition panel is damaged or broken down
(a) Decrease continuous starting time, and lower charging
electricity of generator
(b) Replace accumulator case
(c) Check and repair
渊44冤Accumulator self-discharges
(a) Certain part of the output line short-circuits
(b) Pole plates short-circuit
(c) Partition panel is damaged or broken down
(d) Outer surface of the accumulator is not clean, and
there are metal sundries
(a) Clean output line, eliminate fault of short-circuit
(b) Check and repair
(c) Check and repair
(d) Clean outer surface of the accumulator, tighten protec鄄
tion cover of the accumulator case, replace electrolyte if
necessary
VII尧Illustration of vehicle
渊玉冤 Special-purpose chassis
渊域冤 Truck
渊芋冤 Transport van
渊郁冤 Stake truck
渊吁冤 Van-type truck
渊遇冤 Mail car
HFC1045
series trucks
Tire
specifica鄄
tion
6.50-16
7.00-16
Tread
渊Front/Rear冤
(mm)
1580/1395
GVW
(kg)
Approach/
Departure
angle
(毅)
23/14
Curb
weight
(kg)
2180
Max.
Number of
allowable
passengers
in the cab
(person)
4490
2
Front suspension/
rear suspension
(mm)
1105/1380
Max.
Speed
(km/h)
Memo
95
ID No. of chassis院1218869
One of the following configurations
can be chosen for front leaf spring:
3pieces +2cushion
blocks
or
3pieces+4 cushion blocks
6.50-16
7.00-16
1580/1395
23/14
2180
4490
2
1105/1380
95
ID No.of chassis.院1219006
One of the following configurations
can be chosen for front leaf spring:
3pieces +2cushion
blocks
or
3pieces+4 cushion blocks
6.50-16 1580/1395 4490
3
1960
23/14
1105/1377
95
ID No. of chassis院1003613
No.
1
Vehicle model
HFC1043K8
Special-purpose
chassis
Engine model
Wheel base
(mm)
3308
Number of
leaf spring
(Front/rear)
3/16
2
HFC1043K8R1
Special-purpose
chassis
3308
3/16
3
HFC1045KS
Special-purpose
chassis
YZ4102QB
CY4102Q
3308
3+2/9+7
3+4/9+7
Contour dimension
渊length伊width伊height冤
(mm)
5793伊1810伊2160
5793伊1810伊2160
5790伊1830伊2150
Engine
displacement/power
(ml/kW)
3423/63
3268/57
4
HFC1045KR1S
Special-purpose
chassis
YZ4102QB
CY4102Q
3308
3+2/9+7
3+4/9+7
5790伊1830伊2150
3423/63
3268/57
5
HFC1045K1S
Special-purpose
chassis
4JB1
2771/57
5795伊1810伊2160
3308
3/16
YZ4102ZLQ
CY4100ZLQ
CYQD32T
HFC4DA1-1
4100QBZL
YZ4102ZLQ
CY4100ZLQ
CYQD32T
HFC4DA1-1
4100QBZL
3432/70
3707/70
3153/80.9
2771/68
3298/70
3432/70
3707/70
3153/80.9
2771/68
3298/70
(玉) Special-purpose chassis
HFC1045
series trucks
98
99
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