© Apr 2022 5-2 TB18 Plus&20J Plus Operation Manual
PRE-OPERATION INSPECTION
• Only qualified maintenance technicians can repair
the machine according to the manufacturer's
regulations. After any maintenance, the operator
must perform another pre-operation inspection
before conducting a pre-operation function test.
• Qualified maintenance technicians must perform
regular maintenance inspections according to the
requirements in the manufacturer’s Maintenance
Manual.
CONDUCTING A PRE-
OPERATION INSPECTION
Before starting the machine, check whether it meets the
following requirements:
• Ensure the Operation Manual and Maintenance
Manual are in good condition, legible and stored in
the storage compartment on the platform.
• Make sure all labels are legible and appropriately
located.
• Check for hydraulic oil leaks and proper oil level.
Add oil as needed. See Inspect Hydraulic Oil
Level, page 5-2.
• Check for diesel fuel leaks and proper fuel level.
Add fuel as needed. See Inpsecting Fuel Level,
page 5-3.
• Check for proper engine oil level. Add engine oil as
needed. See Inspecting Engine Oil Level, page 5-
4.
• Check for proper coolant level. Add coolant as
needed. See Inspecting Coolant Level（water-
cooled engine）, page 5-5.
• Check battery for leaks and proper liquid level. Add
distilled water as needed. See Inspecting the
Battery, page 5-6.
• Check whether the protective device in use matches
the type of work performed and conforms to relevant
technical standards.
INSPECTING PARTS
Before each use or work shift,check the machine for
any damaged, improperly installed, loose or lost parts
and unauthorized changes:
• Electrical components, wiring,cables and safety
rope
• Hydraulic hoses & fittings, hydraulic cylinder and
manifolds
• Fuel tank and hydraulic tank
• Storage battery pack and its connection
• Drive motor & reducer, slewing motor & reducer
• Boom wear pads and telescopic axle wear pads
• Limit switch and horn
• Tires and rims
• Engine and associated parts
• Alarms and lighting (if equipped)
• Platform（including rails, floor plate, safety lock,
brackets and entry door）
• Personal protection equipment
• Emergency control equipment
• Operation instructions, warning and control decals
• Structure and welding cracks
• Nuts, bolts and other fasteners
NOTICE
If damaged parts, incorrect installation or missing
parts are discovered, please replace immediately
and install correctly; if the fasteners are found
detached or loose, please secure immediately.
INSPECTING ENTIRE
MACHINE
Inspect the entire machine for:
• Cracks in a weld joint or structural part
• Dents or other damage
• Severe rust, corrosion or oxidation
• Improper twisting of steel wire ropes, electric
cables, hoses inside the platform
• Missing or loose structural parts and key
components, including fasteners and pins for
correct positioning and tightness
• After the inspection, ensure all covers are in place
and securely locked
INSPECT HYDRAULIC OIL
LEVEL
Ensuring appropriate hydraulic oil level is vital to proper
operation of the machine. If too high, the oil will spill out
from the oil tank during machine operation, if too low,
the oil pump will suction air and damage hydraulic
components. Performing daily inspection of the
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