© Oct. 2022 5-2 GTZZ18J Operation Manual
PRE-OPERATION INSPECTION
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 the hydraulic oil for leaks and the hydraulic
oil level. Add oil as needed. See Inspect Hydraulic
Oil Level, page 5-2.
• Check the diesel fuel for leaks and the diesel fuel
level. Add fuel as needed. See Inspecting Diesel
Fuel Level, page 5-3.
• Check the engine oil level. Add engine oil as
needed. See Inspecting Engine Oil Level, page 5-
4.
• Check the coolant level. Add coolant as needed.
See Inspecting Coolant Level（water-cooled
engine）, page 5-5.
• Check the battery for leaks and the liquid level. Add
distilled water as needed. See Inspecting the
Battery, page 5-6.
• Check whether the protective device in use is
appropriate for the type of work performed and
conforms to relevant technical standards.
INSPECTING PARTS
Before each use or work shift, check the following items
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 oil tank
• Storage battery pack and its connection
• Drive motor, drive reducer and slewing reducer
• Boom wear pads and telescopic boom wear pads
• Limit switch and horn
• Tires and rims
• Engine and its relevant components
• Alarms and lighting lamp (if equipped)
• Platform (including rails, floor plate, safety lock,
brackets and entry door)
• Structure and welding cracks
• Nuts, bolts and other fasteners
• Personal protection equipment
• Emergency control equipment
• Operation instructions, warning and control signs
NOTICE
If any part is found to be damaged, improperly
installed or lost, please replace with a new part
immediately and install it correctly; if any fastener is
found detached or loose, please secure it
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 the hydraulic oil at an appropriate level is vital
to proper operation of the machine. If hydraulic oil level
is too high, the oil will spill out from the oil tank during
machine operation; if hydraulic oil level is too low, the
oil pump will have entrained air and hydraulic
components will be damaged. Performing daily
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