REPAIR PROCEDURES
AB18EJ&18HJ Maintenance Manual 6-7 © Oct 2020
25. Remove the bolts, shims and snap plate at the pin
#8 connecting the lower upright with the lower
secondary boom.
26. Using brass drift and wooden hammer, tap the pin
#8 out.
27. Using lifting device, lift away the the lower upright.
28. Remove the bolts, shims, and snap plate at the pin
#9 connecting the lower link with the lower
secondary boom.
29. Using brass drift and wooden hammer, tap the pin
#9 out.
30. Using lifting device, lift away the the lower link.
31. Remove the bolts and nuts at the pin #11
connecting the lower secondary boom with the
turntable.
32. Using brass drift and wooden hammer, tap the pin
#11 out.
33. Using lifting device, lift away the the lower
secondary boom.
CHASSIS AND TURNTABLE
COMPONENTS
Tires and Rims
Replacing tires and rims
Hunan Sinoboom Intelligent Equipment Co., Ltd.
recommends the replacement tires be of the same size,
ply rating and brand as the original tires. For the part
number of a specific machine model, please reference
the Part Manual.If the replacement tires are not
asHunan Sinoboom Intelligent Equipment Co., Ltd.
recommends, the following requirememts of tires
should be met：
1. Ply rating/rated load and dimension equal or
greater than original.
2. Tire tread contact width equal or greater than
original.
3. Wheel diameter, width and offset dimensions equal
to the original.
4. Approved for the application by the tire
manufacturer (including intended purposes,
maximum drive speed and maximum tire load, etc.).
5. Due to size variations between different tire brands,
both tires on the same axle should be the same.
UNSAFE OPERATION HAZARD
The tires and rims installed on each
product model have been designed
for stability requirements. Size
changes such as rim width, center
piece location, diameter, etc., without
written factory recommendations,
may result in an unsafe condition
regarding stability.
Installing tires and rims
It is extremely important to apply and maintain proper
wheel mounting torque.
UNSAFE OPERATION HAZARD
• Use the wheel nuts that suit the
rim bolts. The wheel nuts must be
installed and maintained at the
proper torque to prevent loose
wheels, broken studsand possible
dangerous separation of wheels
from the axle, Be sure to only use
the nuts matched to the cone
angle of the wheel.
• Tighten the lug nuts to the proper
torque to prevent wheels from
coming loose, Use a torque
wrench to tighten the fasteners. If
you do not have a torque wrench,
tighten the fasteners with a socket
wrench, then immediately have a
service garage or dealer tighten
the lug muts to the proper torque.
Over-tightening will result in
breaking the studs or
permanently deforming the
mounting stud holes in the
wheels.
The proper procedure for attaching wheels is as
follows:
1. First apply the threadlocker Loctite 272 to the nuts,
then hand tighten all nuts to prevent cross-
threading. Do not use a lubricant on threads or
nuts.
2. Tighten the nuts in the sequence as shown below.
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