Yongmao STT113 Installation and operating instructions

STT113
TOWER CRANE
II. OPERATION & SERVICE MANUAL
Fushun Yongmao Construction Machinery Co. Ltd.
2007R32

Table of contents
Chapter I Tower crane parameter and structure .......................... 1B-1
Chapter II Safe rules of tower crane ........................................... 2B-1
Chapter III Operation .................................................................... 3B-1
Chapter IV Power suppl and schematic diagram ........................ 4B-1
Chapter V Hoisting winch .......................................................... 5B-1
Chapter VI Slewing mechanism ................................................... 6B-1
Chapter VII Trolle winch .............................................................. 7B-1
Attached: Electric diagram
Chapter VIII Safet device ............................................................. 8B-1
Chapter IX H draulic s stem ....................................................... 9B-1
Chapter X Fitting and inspection rules of wire rope for hoisting
machiner ................................................................. 10B-1
Chapter XI Slewing ring ............................................................. 11B-1
Chapter XII Tower crane maintenance ......................................... 12B-1

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
1B 1
Chapter I Tower Crane Parameter and Structure 


I. Main performance parame er and ex ernal dimensions
Loading capaci y Table 1—2—1
R Fall
R(max)
m
C(max)
t 20
25.0
30.0
35.0
37.5
0.0
2.5
5.0
7.5
50.0
52.5
52.5
Ⅳ
ⅣⅣ
Ⅳ
12.76
6.00
3.52
2.67
2.12
1.73
1.57
1.43
1.31
1.21
1.11
1.03
0.95
Ⅱ
ⅡⅡ
Ⅱ
23.05
3.00
3.00
2.72
2.16
1.77
1.62
1.48
1.36
1.26
1.16
1.08
1.00
50.0
Ⅳ
ⅣⅣ
Ⅳ
14.43
6.00
4.09
3.13
2.49
2.05
1.87
1.71
1.58
1.46
1.35
1.25
Ⅱ
ⅡⅡ
Ⅱ
26.18
3.00
3.00
3.00
2.54
2.09
1.92
1.76
1.63
1.50
1.40
1.30
7.5
Ⅳ
ⅣⅣ
Ⅳ
14.45
6.00
4.10
3.13
2.50
2.05
1.87
1.72
1.58
1.46
1.35
Ⅱ
ⅡⅡ
Ⅱ
26.22
3.00
3.00
3.00
2.55
2.10
1.92
1.77
1.63
1.51
1.40
5.0
Ⅳ
ⅣⅣ
Ⅳ
15.06
6.00
4.31
3.30
2.64
2.17
1.98
1.82
1.68
1.55
Ⅱ
ⅡⅡ
Ⅱ
27.38
3.00
3.00
3.00
2.68
2.22
2.03
1.87
1.73
1.60
2.5
Ⅳ
ⅣⅣ
Ⅳ
15.53
6.00
4.47
3.43
2.74
2.26
2.07
1.90
1.75
Ⅱ
ⅡⅡ
Ⅱ
28.25
3.00
3.00
3.00
2.79
2.31
2.11
1.95
1.80
0.0
Ⅳ
ⅣⅣ
Ⅳ
15.24
6.00
4.37
3.35
2.68
2.20
2.01
1.85
Ⅱ
ⅡⅡ
Ⅱ
27.72
3.00
3.00
3.00
2.73
2.25
2.06
1
.90
37.5
Ⅳ
ⅣⅣ
Ⅳ
15.72
6.00
4.53
3.48
2.79
2.29
2.10
Ⅱ
ⅡⅡ
Ⅱ
28.62
3.00
3.00
3.00
2.83
2.34
2.15
35.0
Ⅳ
ⅣⅣ
Ⅳ
15.75
6.00
4.54
3.49
2.79
2.30
Ⅱ
ⅡⅡ
Ⅱ
28.67
3.00
3.00
3.00
2.84
2.35
30.0
Ⅳ
ⅣⅣ
Ⅳ
17.12
6.00
5.01
3.86
3.10
Ⅱ
ⅡⅡ
Ⅱ
30.00
3.00
3.00
3
.00
3.00
1.00t
1.40t
1.80t
2.15t
2.5 m
37.5m
42.5m
1.30t
47.5m
50.0m
3
.
2
m
12.5m 54.2m
30.0m
35.0m
40.0m
45.0m
6t
52.5m
1.60t
LJ1002A LJ1003 LJ1004 LJ1005 LJ1507 LJ1508
LJ1002A LJ1003 LJ1004 LJ1005 LJ1507 LJ1508
LJ1002A LJ1003 LJ1004 LJ1005 LJ1507
LJ1507LJ1005LJ1004LJ1003LJ1002A
LJ1002A LJ1003 LJ1004 LJ1507
LJ1507LJ1004LJ1003LJ1002A
LJ1002A LJ1003 LJ1004 LJ1507
LJ1507LJ1004LJ1003LJ1002A
LJ1002A LJ1003 LJ1004
LJ1508
LJ1508
1.90t
2.35t
3.10t

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
1B 2
Table 1-2-2
Type S a ionary ype Traveling ype
Opera ing condi ion In service
Ou of service In service
Ou of service
F1
65 46
F2 98 112
F3 70 135
Dead weigh 52
64
STT113 main performance parameter of tower crane mechanism
Table 1-2-3
Items Mechanism Speed / Hoist weight Rope capacity
Motor
Kw
m/min t m/min t
Hoisting
24PQC15
400m
>400m*
24/24/5.5
０－ 8.5
０－ 40
０－ 80
3.0
3.0
1.5
０－ 4.2
０－ 20
０－ 40
6.0
6.0
3.0
Trolleying
DTC55 0→57 m/min 55 N.m
Slewing RTC95 0-0.7rpm 95 N.m
Traveling
RT 12.5-25 m/min 2x1.7/3.4
* Consul us
F2 F3
L13A1
7
6
5
4
3
2
1
H(m)
40.26
37.26
34.26
31.26
28.26
25.26
22.26
19.26
6
.
0
m
9
m
0
.
1
5
m
1.2x1.2m
L
1
3
G
3
0
3
.
0
m
L
1
3
G
2
0
8
14.76
11.76
12
L
4
3
G
2
0
7
.
5
m
44.76
41.76
38.76
11
L43A1
1.6x1.6m
H(m)
1
2
3
4
5
6
7
8
9
10
35.76
32.76
29.76
26.76
23.76
20.76
17.76
6
.
0
m
L
1
3
G
2
0
YZ43X
41.16
38.16
35.16
32.16
29.16
26.16
23.16
20.16
1
0
.
0
5
m
1.2x1.2m
3
m
4.5x4.5m
H(m)
8
7
6
5
4
3
2
1
L13A1
F1
L43A1
1.6x1.6m
4.5x4.5m
YZ43X
17.16
16.26
1
2
3
4
5
11
9
8
10
6
7
H(m)
8
.
5
5
m
12.66
15.66
18.66
21.66
24.66
27.66
30.66
33.66
36.66
39.66
42.66
3
m
L13A1
H(m)
58.26
6
.
0
m
9
m
1.2x1.2m
L
1
3
G
3
0
76.26
H(m)
H(m)
94.26
130.26
H(m)
H(m)
112.26
1 1 1 1 1
4 4 4 4 4
5 5 5 55
6 6 6 6 6
13
14 11 11 11 11 12 12 12 12
17 17 1717
L
1
3
G
2
0
18 18 18 18
19
20 23 23 23
24 24 24
25
26 29 29
30 30
31
32 35
36
37
38

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
2B - 1
Chapter II Safe Rules of Tower Crane
I. manual of saf rul s ························································· 2B-2

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
2B - 2
I. manual of safe rules
1. The regulation of correct used
（1）It is forbidd n to us th tow r cran which has not pass th p rformanc t st;
（2）According to th t chniqu r gulation and m thod of us , th cran must b us d
in its good condition. Pay mor att ntion to th saf ty to pr v nt th dang rous!
Eliminat all kinds of malfunctions in tim which may caus th saf ty accid nt;
（3）Op rat th tow r cran in sp cifi d scop of t mp ratur : (-20℃--+40 )℃;
（4）Op rat th cran in sp cifi d limit of wind sp d (th max. wind sp d for op rating is
20m/s, th max. wind sp d out of s rvic is 50m/s);
（5）Obs rv th r gulation in op ration manual and r gulation r lat d to s rvic and
maint nanc .
2. Safety measures
（1）Th op rator should r ad th op ration rul s b for op rating th tow r cran ；
（2）Th op rator should always r m mb r v ry saf ty m asur and r cogniz th
hazard, m anwhil , th op ration rul s should b visibl ；
（3）It’s forbidd n for th op rator to b with long hair, w aring rob or w aring
j w lry;
（4）Oft n r ad th warning board about saf ty and pr v nting from hazard;
（5）If th cran is in abnormal condition, stop op ration imm diat ly and r port it to
th int r st d p rson;
（6）It is forbidd n to chang or add any parts of th cran , unl ss th tow r cran
manufactur r p rmitt d;
（7）S rvic , lubricat and d bug th cran according to th cycl sp cifi d in
op ration manual;
（8）Th cran op rator should know th position of fir proofing quipm nt, and
grasp th m thod of using it.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
2B - 3
3. Personnel selecting and their qualifications
（1）Th tow r cran musts b op rat d by qualifi d p rson;
（2）Th cran op rator must b train d. Th r must b a sp cific r gulation about
th ability of driv r, r ctor, maint nanc and s rvic p rson;
（3）Cran op rators should clarify th ir r sponsibility, and mak th m know that
th y should r fus all th ord r which act against th saf ty；
（4）Th xp ri nc d p rsonn l must sup rvis at jib sit wh n th tow r cran is
op rat d by train s or l arn rs.
（5）Th installing, d bug and maint nanc of l ctric quipm nt must b op rat d
by comp t nt l ctrician.
（6）Th d bug and maint nanc for ach m chanism must b op rat d by
prof ssional;
（7）Th installing, d bug and maint nanc of hydraulic d vic must b op rat d by
xp ri nc d prof ssional.
. The safety rules during working stage
（1）Ev ry tim b for starting up:
a). Giv audi nc to th ord r of job sit sup rvisor;
b). Switch on；
c). R mov cushion block, loos n th rail clamping d vic and oth r fixing
d vic (wind sp d ≤ 13m/s);
d). Ch ck that is th r any obstacl on th track;
). Canc l th jib w ath r van condition；
f). Ch ck that ar all th prot ctiv d vic and saf ty d vic in normal
condition.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
2B - 4
（2）In s rvic
a). Th driv r should op rat th cran in th cabin;
b). T st th motion of ach m chanism with no load and low sp d, m anwhil ,
ch ck that wh th r th brak is s nsitiv b for lifting load;
c). It is forbidd n to us any op rating mod which can thr at n th tow r
cran saf ty;
d). B for trav ling, driv th jib to th c nt r lin of th track;
). It is forbidd n to pass load ov r th p rson wh n th cran is in s rvic ;
f). It r quir s som on to guid , wh n th load is out of th sight of th driv r;
g). It is forbidd n to sling ov rw ight load out of th sp cifi d radius;
h). It is forbidd n to sling h avy load wh n th load has not b n hang firmly;
i). It is forbidd n to canting pull th load;
j). It is forbidd n to sling th load which has fix d to th ground;
k). It is forbidd n to stop normal motion by m rg ncy stop button; it only can
b us d in xc ptional cas which may thr at n th saf ty;
l). It is forbidd n to us limit r and brak as an normal stop d vic ;
m). It is forbidd n to short-circuit, chang and adjust th saf ty d vic , or
obstruct its normal op ration;
n). Wh n th max. wind sp d is l ss than 20m/s, windward surfac of th load
should b low r than 1m
2
/t. Stop working if th wind sp d r ach s to
20m/s;
o). Mak sur that th r is no obstacl nt rs into jib sl wing ar a aft r th
tow r cran trav ling;
p). If th cran op ration is in bad condition, stop imm diat ly and s nt
som body to r pair;
q). Mak sur that th r is nough distanc b tw n th tow r cran and air
l ctric wir ;

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
2B - 5
（3）Aft r on day’s work:
a). Lift th hook b low th limit point, m anwhil , it is forbidd n to l av any
load on th hook;
b). Driv th troll y clos to th mast;
c). Starting th w ath r van ;
d). Grip th clamp rail on th track;
). Cut off th pow r supply and lock d.
5. Maintenance and fault clearance during the tower crane operation
（1） D bug, maint nanc and ch ck-up ach part of th cran according to th
m thod and cycl sp cifi d in op ration manual; and r plac som parts and
d vic s according to th r gulation;
（2） If it n ds to s rvic and maint nanc th tow r cran with pow r outag , adopt
n c ssary m asur s to pr v nt fals starting of th cran . First, lock th pow r
supply pan l, and tak off th k y. S cond, hang warning plat on th pan l;
（3） If it n ds to dismantl som saf ty d vic s during s rvic and maint nanc ,
aft r this, it should b ass mbl d and r adjust d.
6. Instruction for special dangerous
（1） Wh n op rating tow r cran n ar th air lin , th r should b nough distanc
b tw n th tow r cran and air lin .
a). Onc th tow r cran conn ct d with th air lin , th driv should stay in th
cab, to pr v nt from g tting an l ctric shock;
b). Driv th cran out of dang rous zon at onc ;
c). Notify th p rson around don’t clos to th cran ;
d). Cut off th pow r supply which conn ct d with th air lin ;
). Don’t l av th tow r cran unl ss you can confirm that th l ctric wir has
b n cut off

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
2B - 6
（2）Maint nanc of th l ctrical quipm nt only can b carri d out by qualifi d
l ctrician or train which is sup rvis d by a qualifi d l ctrician according to
th l ctrical rul s.
a).. Th tow r cran must b cut off th l ctricity during maint nanc and r pair,
m anwhil , s t up a warning plat of “mann d op ration, prohibit switch on”
on th obvious position of pow r supply pan l, th n arth or short circuit th
pow r lin (aft r this, do pl as dismantl th arthing and short circuit lin );
b). Th l ctrical quipm nt of tow r cran should b ch ck d p riodically. If
discov r som hidd n dang r, such as conn ction loos n, l ctrical wir
arthing, compon nt br akag , tc, it must b liminat d in tim ;
c). If it must carry out liv -wir work, th r should b som on to monitor, so that
th main pow r supply can b cut off in m rg ncy situation.
7. Hydraulic system
a). Only th prof ssional or xp ri nc d p rson can op rat th hydraulic
syst m；
b). P riodic ch ck v ry kind of conduct pip , fl xibl pip and joint, so that
ch ck up th oil l ak and xt rnal malfunction, if so, liminat that
imm diat (oil l ak may caus damag and fir );
c). R l as th compon nt pr ssur according to th r l vant r gulations b for
r pairing.
d). Install th hydraulic pip lin corr ctly. Do not conn ct th high and low
pr ssur int rfac s in r v rs . M anwhil , th joint l ngth and quality of th
fl xibl pip should m t th r quir m nt;
). Hold th oil quantity and quality in th oil box. Ch ck th hydraulic oil
quality p riodically, if th oil has alr ady d t riorat d, it must b r plac d at
onc which can nsur th pump station work normally.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 1
Chapter III Operation
I. General rules ····························································· 3B-2
II. Operation highlight ···················································· 3B-3
III. Operation instruction ················································· 3B-4
IV. Precautions during operation ······································ 3B-7
1. Each ti e before operation ·············································· 3B-7
2. During operation ·························································· 3B-7
3. Each ti e after operation ················································ 3B-8
4. Periodical inspection ite ··············································· 3B-9
V. Operation ································································· 3B-14
1. Control panel layout and operating ethod ··························· 3B-14
2. Precautions during operation ············································ 3B-17
3. Operating ethod for weather vane effect ···························· 3B-18

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 2
Important declaration:
A thorough debug must be made upon finishing the installation and erection of
the tower crane. The tower crane can only be put into ser ice when it is
appro ed by local safety authorities with the issuance of license.
I. General rules
Tower crane driver ust be the qualified professional who has trained by authoritative
board of labor or specified units and passed the exa .
The driver ust operate, service and aintain the crane correctly. It is i portant for
reducing failure, i proving device availability, avoiding loss of working ti e and
prolonging service life of equip ent.
Incorrect operating will result in da age of all electric otor, reducer, dru , brake
and wire rope, even the integral steel construction. What is ore, it ay cause serious
echanical accident, and result in personnel loss.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 3
II. Operation highlight
a) Control panel is finishing equip ent. It ust be careful when operating it.
b) The control lever ust be operated slowly when starting or stopping.
c) Change shift one by one, it is forbidden to get over shift.
d) It is forbidden to disobey sequential operation when stopping so e action.
e) The control lever should turn to zero position gradually when actuating
device aking reverse ove ent. Operate until the echanis co pletely
stopped.
f) It is forbidden to operate the crane which safety device has a failure,
unsoundness or inaccurate, further ore it is forbidden to pick off or sealed
the safety device.
g) Discovery the stoppages should stop and check i ediately forbid to be
continue. Once discover so e failure, it ust be stopped and checked
i ediately. It is forbidden to operate the crane with failure.
h) The driver is entitled to refuse the co and which against safety rules.
i) The driver ust aster the o ent curve, the ax. load, the in. load (at
the jib end) and the load under hook in rando radius.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 4
III. Operation instruction
（1）Starting
a) Check the tower crane before everyday starting according to the instruction
regulation. If there is any proble , report it and it is not allowed to start any
ore.
b) Switch on the ain power supply and press the start button.
c) Test the working order of all echanis s with low speed gear in light condition
and check the li it device of all echanis s.
d) Check that whether all safety devices are integrated and acting reliable.
e) Before lifting load, check the sensitivity and reliability of the brake.
（2）Operating the hoisting winch
a) Confir the lifting load radius according to the o ent curve (or table).
b) Esti ate the weight of lifting load
- Lift the load 1 high slowly in s all radius.
- Move the load forward slowly by changing radius of trolley with low speed.
- Stop forward ove ent when oving to the position of o ent li iter.
- Confir the radius of trolley stopping.
- Esti ate the weight of load according to o ent characteristic diagra (table)
and radius.
c) Use the Min. lifting speed before the wire rope tightened up.
d) Use the Min. lowering speed when lowering load.
e) Use the ediu speed when start lifting (after load taking off the ground) or be
over lifting.
f) If the height is allowable in nor al lifting, use the rated speed of otor instead
of ediu speed.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 5
g) The speed was selected by the weight of load. Heavy load selected low speed
(PV) and light load selected high speed (GV).
h) Stop oving before operating the stroke li iter.
i) Don’t put the hook on ground.
j) Loosen the wire rope slowly to avoid rope winding when placing load.
(3) Operating the slewing echanis
a) Select the slewing speed according to the shift to be reached.
b) Every ti e use the ax. speed as long as the angle allowed.
c) If the slewing echanis suddenly changes its speed, it ay cause the ast
twisting and jib swing. So acceleration and deceleration operation should be
done gradually.
d) It is forbidden to stop the jib by slewing brake. It should decelerate first, and
then release the control lever, so that the brake can brake in inor slewing
speed.
e) The slewing brake can only be used in windy condition, it can keep jib in its
position.
f) When slewing the jib, it is reco ended to operate the lifting ove ent and
lowering ove ent at the sa e ti e to avoid distorting of the wire rope and it
is convenient for the rope swivel to work.
g) Stop the slewing ove ent before slewing li iter start to work.
(4) Operating the trolley winch
a) The trolley speed is selected by the distance of the trolley.
b) It ust accelerate or decelerate gradually to avoid swing when suddenly
changing the shift of trolley operation.
c) Stop the trolley ove ent before operating the trolley li iter.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 6
(5) Operating the traveling echanis
a) The traveling speed is selected by the distance of traveling.
b) In order to ensure the tower crane safety, when it traveling in the track, the trolley
ust be at the jib foot; if operating in the track curve, beside keep the trolley in
the jib foot, it ust travel with low speed. Meanwhile, it is forbidden to keep the
jib facing to the inside of curve track.
c) Before traveling to the end of the track, the tower crane operation ust be
stopped.
d) There are two brakes in the traveling otor, one of the used for buffering and
decelerating, the other used for stopping the crane ove ent which via 6-8
seconds ti e delay after powering off auto atically braked. After the control
lever return to zero, the crane can still run a few eters, so this operation should
be done advanced.
e) Attention during traveling the crane:
- Warn people to leave the dangerous areas by hailer；
- Observe that if there are so e obstacles on the track；
- It is forbidden to ake the cable pileup or pull it too tight.
f) When traveling, the jib ust be in the centerline of the track.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 7
IV. Precautions during operation
The working en ironmental temperature of tower crane is: -
--
-20
2020
20℃
℃℃
℃～
～～
～+
++
+40
4040
40℃
℃℃
℃, the
max. working wind speed is 20m/s and working grade is A4
44
4.
1. Each ti e before operation
a). Make sure that the power supply, cable and switches are in perfect condition.
b). Make sure that each pin, bolt and split pin are in nor al condition, restrict the
jib slewing freely (release the weather vane effect).
c). Make sure that the counter-jib ballast and base ballast are fixed fir ly.
d). Check the hoisting and trolleying wire rope.
e). Check the lubricating of hoisting reducer and slewing ring.
f). Switch on the power supply.
g). Test all echanis s with no load and check each echanis , brake and
li iter, if necessary, readjusted it.
h). If the working height of tower crane is beyond 50 , an ane oscope ust be
installed. If the wind speed exceeds 20 /s, it can sent audible and visual alar ,
then, the tower crane ust stop working.
2. During operation
a). Never lift load beyond the per itted radius.
b). Never pull load in an oblique direction.
c). When entering into the cabin, check that whether the extinguisher, instruction
plate and warning plate are in place.
d). Check that whether the hailer is in perfect condition.
e). Never lift load or other co ponents which fixed on the ground.
Pay special attention: if hear some abnormal noise, stop operating the
tower crane immediately, and inform it to the site super isor; if the wind speed
reaches to 20m/s，
，，
，and sent audible and isual alarm, it must stop working; if the
load is out of the sight of the dri er, there must be someone as a guide; ne er
cancel any safety de ice or adjust at random without authorization.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 8
3. Each ti e after operation
a). Lift the hook to the top end.
b). Drive the trolley to the jib foot, start the weather vane and brake device, to
ake the jib slewing freely (weather vane effect). If power off, anual operate
this device. For traveling type tower crane, anchor the crane by 4 rail cla ping
devices.
NOTE: The weather vane effect, that is to say, above the upper slewing can slew
freely, it can reduce the windward area auto atically. Thus the crane driver ust
start the weather vane after he is off duty.
c). Turn off the ain power supply switch and take the easures against rain.
d). Depress the e ergency button, and cut off the power supply.

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 9
4. Periodical inspection ite
1). Electricity
Inspection ite
Cycle
After each erection Half a onth
Check the ax. supply voltage of tower crane
∨
Check that whether the connection of earth
wire is in good condition
∨ ∨
Check the connecting condition between
tracks connection and between tracks and
earth conductor
∨
Check the earth resistance of tower crane
∨
Check the insulation resistance of electric
equip ent
∨
Check the otion of relay in each circuit,
which can protect the tower crane safety
∨
Check the insulation resistance of otor
∨
Check the contact condition of switch contact
in circuit
∨
Check that whether the connecting ter inal
in each electrical panel and resistance box
(including the inner binding screw and nut) is
tightened up.
∨ ∨
Ensure that every electrical co ponent is in
good condition, and connecting wire for the
has already been tightened up
∨ ∨

STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
3B - 10
2). Machinery
Inspection ite
Cycle
After each erection
Half a onth
Metal
structure
Mast verticality and levelness
∨ ∨
Visual inspection of gear ring bolt
∨
Tighten up of slewing gear ring
bolt
∨ ∨
Visual inspection the fishplate
connection on standard ast, jib,
counter jib and fixing plate on
base plate, including pin, split pin
and bolt.
∨ ∨
Detect the crack of section steel
and check the weld joint
∨ ∨
Mechanical
parts
Adjust and
check the
brake with
ax. load
Hoisting winch
∨
Slewing echanis
∨
Trolleying winch
∨
Traveling
echanis
∨
Check the
worn out of
the wearing
plate
Hoisting winch
∨ ∨
Slewing echanis
∨ ∨
Trolleying winch
∨ ∨
Traveling
echanis
∨ ∨
Check the
oil level of
reducer
Hoisting winch
∨ ∨
Slewing echanis
∨ ∨
Trolleying winch
∨ ∨