Zoomlion QY30V, Manual

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08 - 8 08 - 8
drum rotation. drum rotation.
Replace the brake drum no later than when its inner diameter exceeds the Replace the brake drum no later than when its inner diameter exceeds the
maximum permissible value. If this is not done, the brake drum can fail, maximum permissible value. If this is not done, the brake drum can fail,
Danger Danger
Crane inspections Crane inspections
which can cause fatal accidents. which can cause fatal accidents.
d) d) Replace the Replace the springs, seali springs, sealing elements ng elements and dust and dust cover insi cover inside the de the brake at brake at least least
every 2 years. every 2 years.
All the brake maintenance and repair work may only be carried out by All the brake maintenance and repair work may only be carried out by
authorized and trained expert personnel! Danger of fatal accidents due to authorized and trained expert personnel! Danger of fatal accidents due to
erroneous maintenance or repair on the brake! erroneous maintenance or repair on the brake!
e) e) Carry out Carry out a brake a brake structure, structure, function and function and performance test performance test again on again on all w all wheels after heels after
completion of assembly work. completion of assembly work.
8.4.3 Inspecting the hoist and slewing mechanisms 8.4.3 Inspecting the hoist and slewing mechanisms
The hoisting and slewing mechanisms are designed using planetary gear reducers. The hoisting and slewing mechanisms are designed using planetary gear reducers.
Even though the hoisting and slewing mechanisms are designed for long life, an Even though the hoisting and slewing mechanisms are designed for long life, an
external visual inspection is not adequate, since their life can be significantly affected by external visual inspection is not adequate, since their life can be significantly affected by
bad maintenance, defective seals, improper operation or overuse. The inspection must
bad maintenance, defective seals, improper operation or overuse. The inspection must
therefore be carried out by a competent inspector in accordance with the following therefore be carried out by a competent inspector in accordance with the following
requirements: requirements:
a) a) 1000 1000 hours hours of of operation, operation, minimum minimum once once per per year; year;
b) b) Inspecting Inspecting oil oil level level
For hoisting winch reducer, we recommend that the oil is drained and the amount For hoisting winch reducer, we recommend that the oil is drained and the amount
compared to the specified oil quality; compared to the specified oil quality;
Evaluating oil color Evaluating oil color
Assume Assume that that the the oil oil has has been been overheated overheated if if it it is is black black and and /or /or a a burnt burnt oil oil smell smell is is
detected. Change the oil; detected. Change the oil;
c) c) Evaluation Evaluation of of foreign foreign substances substances found found in in the the oil oil
If gear oil is polluted seriously, change it even if it has not reached the oil change If gear oil is polluted seriously, change it even if it has not reached the oil change
intervals. Refer to the following table: intervals. Refer to the following table:
I t e m s I t e m s
Oil changing Oil changing
i n d e x i n d e x
Test method Test method
Appearance Appearance Abnormal Abnormal Visual Visual
Kinematic viscosity change rate (40 Kinematic viscosity change rate (40 ℃ ℃ ) % ) % ＞ ＞ +15 +15 or or -20 -20 GB/T265 GB/T265
Danger Danger