© Feb. 2023
58
TB20J Plus Operation Manual
MAINTENANCE
Fig 1
Check Wheel Fasteners
The wheel nuts should be tightened before the machine
is put into service for the first time and after each tire is
removed. Check and tighten the wheel nuts to the speci-
fied torque every 3 months or 250 working hours.
Replacement Requirements
• The tires and rims on the machine have been
designed and selected according to the overall
performance and load stability requirements of
the machine, so their models, rim width, instal-
lation center surface, diameter, etc. must not
be changed, otherwise it may result in an un-
safe condition regarding stability.
• Use the special wheel nut that suits the rim
bolt. The wheel nuts must be installed and
maintained with the proper tightening torque
to prevent loose rims, broken studs and tire
detachment from the axle. Be sure to only use
the nut that matches the cone angle of the
wheel.
Hunan Sinoboom Intelligent Equipment Co., Ltd. recom-
mends the replacement tire be of the same size, ply rat-
ing and brand as the original tire. For the tire part
number of a specific machine model, please reference
its Parts Manual. If the replacement tire is not as Hunan
Sinoboom Intelligent Equipment Co., Ltd. recommends,
the following requirements should be met:
• With the ply rating/rated load capacity and dimension
equal to or greater than the original.
• With the tire tread contact width equal to or greater
than the original.
• With the wheel diameter, width and offset dimen-
sions equal to the original.
• Approved for the application by the tire manufacturer
(including intended purposes, maximum drive speed
and maximum tire load, etc.).
• Due to the size difference between different tire
brands, both tires on the same axle should be of the
same brand.
NOTICE
Unless specifically approved by Sinoboom, do not
replace foam-filled tires with pneumatic tires.
Replace Tires
Tighten the nut to the proper torque to prevent the
tire from loosening. Use a torque wrench to
tighten the fastener, if you don't have a torque
wrench, use a socket wrench to tighten the
fastener and then immediately have a service
station or dealer to tighten the fastener to the
correct torque. Over-tightening will cause the
bolts to break or permanently deform the bolt
holes in the tires.
The correct steps to replace a tire are as follows:
1. Make sure the machine is in stowed position.
2. Press the main power switch and disconnect all
power sources (such as battery charger) connected
to the machine.
3. Use a wrench to loosen but do not remove the tire
retaining nut.
4. Use a jack with sufficient load capacity to lift the ma-
chine frame to the appropriate height so that the tire
assembly is off the ground.
5. Remove the tire retaining nuts and bolts alternately,
and then remove the tire.
6. Align the mounting hole of the new tire with the cor-
responding mounting hole in the frame.
7. After applying Loctite 272 threadlocking adhesive to
the bolts and nuts, install the bolt and nuts
sequentially.
8. Tighten all nuts by hand first to prevent loosening of
the bolts and nuts. Never apply lubricant to threads
or nuts.
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