Zontes ZT184MN User manual

Maintenance Manual
ZT184MN Engine EuroV
2022/7/7

Page 1
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Toatal 53Pages
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Table of Contents………………………………………………………………………………………………………………………………………………………………………………………………………………………………
1
11- The steps of draining oil
1.1
Draining oil…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
5
Discharge the oil
22-Cylinder head assembly
2.1
Remove the cylinder head cover assembly 1………………………………………………………………………………………………………………………………………………………………………………………
6
Remove the cylinder head cover assembly
2.2
Remove the cylinder head cover assembly 2………………………………………………………………………………………………………………………………………………………………………………………
7
Remove the cylinder head cover assembly
2.3
Align the timing chain…………………………………………………………………………………………………………………………………………………………………………………………………………………………
8
Align the timing chain
2.4
Adjust valve clearance………………………………………………………………………………………………………………………………………………………………………………………………………………………
9
Adjust valve clearance
2.5
Remove camshaft 1……………………………………………………………………………………………………………………………………………………………………………………………………………………………
10
sealing cap
tensioner assembly
2.6
Remove camshaft 2……………………………………………………………………………………………………………………………………………………………………………………………………………………………
11
Camshaft assembly
2.7
Remove the cylinder head 1………………………………………………………………………………………………………………………………………………………………………………………………………………
12
Remove the cylinder head
2.8
Remove the cylinder head 2………………………………………………………………………………………………………………………………………………………………………………………………………………
13
Remove the cylinder head
2.9
Remove the cylinder head 3………………………………………………………………………………………………………………………………………………………………………………………………………………
14
Disassemble the cylinder head assembly
2.10
valve assembly……………………………………………………………………………………………………………………………………………………………………………………………………………………………………
15
Check valve tightness
Remove valve assembly
2.11
After-sales parts description………………………………………………………………………………………………………………………………………………………………………………………………………………
16
Cylinder head sub-assembly
Cylinder head valve cam sub-assemblies
Cylinder head valve sub-assembly
Table of Contents
CONTENTS

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Table of Contents
Cylinder head exhaust pipe stud sub-assembly
33-Cylinder block assembly
3.1
Remove the guide bar………………………………………………………………………………………………………………………………………………………………………………………………………………………
17
guide bar
3.2
Cylinder block assembly……………………………………………………………………………………………………………………………………………………………………………………………………………………
18
Cylinder assembly
3.3
Cylinder block assembly……………………………………………………………………………………………………………………………………………………………………………………………………………………
19
Disassemble the cylinder, match the cylinder, piston
3.4
Piston assembly1………………………………………………………………………………………………………………………………………………………………………………………………………………………………
20
Disassemble the piston assembly
3.5
After-sales parts description………………………………………………………………………………………………………………………………………………………………………………………………………………
21
Disassemble the piston assembly
44-Right crankcase cover assembly
4.1
Remove Right Crankcase Cover Assembly 1………………………………………………………………………………………………………………………………………………………………………………………
22
Remove the right crankcase cover
4.2
Remove Right Crankcase Cover Assembly 2………………………………………………………………………………………………………………………………………………………………………………………
23
Remove the fine filter assembly, oil plug
4.3
Remove Right Crankcase Cover Assembly 3………………………………………………………………………………………………………………………………………………………………………………………
24
Remove the water pump cover assembly, remove the joint assembly
4.4
Remove Right Crankcase Cover Assembly 4………………………………………………………………………………………………………………………………………………………………………………………
25
right crankcase cover
4.5
Remove Right Crankcase Cover Assembly 5………………………………………………………………………………………………………………………………………………………………………………………
26
Remove Right Crankcase Cover Assembly
4.6
Remove Right Crankcase Cover Assembly 6………………………………………………………………………………………………………………………………………………………………………………………
27
Remove Right Crankcase Cover Assembly
4.7
Remove the clutch1……………………………………………………………………………………………………………………………………………………………………………………………………………………………
28
clutch pack
4.8
Clutch assembly-1………………………………………………………………………………………………………………………………………………………………………………………………………………………………
29
Friction Plate Assembly
4.9
Clutch assembly-2………………………………………………………………………………………………………………………………………………………………………………………………………………………………
30
clutch pack

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Table of Contents
4.8
Clutch assembly-3………………………………………………………………………………………………………………………………………………………………………………………………………………………………
31
Friction Plate Assembly
55- Left crankcase cover assembly
5.1
Remove left crankcase cover 1…………………………………………………………………………………………………………………………………………………………………………………………………………
32
Remove the reduction gear
5.2
Remove left crankcase cover 2…………………………………………………………………………………………………………………………………………………………………………………………………………
33
Remove the starter motor
5.3
Remove left crankcase cover 3…………………………………………………………………………………………………………………………………………………………………………………………………………
34
Remove left crankcase cover
5.4
Remove left crankcase cover 4…………………………………………………………………………………………………………………………………………………………………………………………………………
35
Magneto Stator Assembly
66-Preparation before the box is split
6.1
Preparation before the box is split 1…………………………………………………………………………………………………………………………………………………………………………………………………
36
Disassemble the oil pump assembly
6.2
Preparation before the box is split 2…………………………………………………………………………………………………………………………………………………………………………………………………
37
Remove primary drive gear, remove shift star wheel assembly
6.3
Preparation before the box is split 3…………………………………………………………………………………………………………………………………………………………………………………………………
38
Remove the electric starter bridge teeth, remove the magneto rotor
6.4
Preparation before the box is split 4…………………………………………………………………………………………………………………………………………………………………………………………………
39
Remove the electric starter gear assembly, remove the output sprocket assembly
6.5
Preparation before the box is split 5…………………………………………………………………………………………………………………………………………………………………………………………………
40
Disassemble the gear display assembly
77-Crankcase split
7.1
Crankcase Split 1………………………………………………………………………………………………………………………………………………………………………………………………………………………………
41
Box split
7.2
Crankcase Split 2………………………………………………………………………………………………………………………………………………………………………………………………………………………………
42
Box split
7.3
Crankcase Split 3………………………………………………………………………………………………………………………………………………………………………………………………………………………………
43
Box split

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Table of Contents
7.4
Crankcase Split 4………………………………………………………………………………………………………………………………………………………………………………………………………………………………
44
Box split
88-Right crankshaft case assembly
8.1
Right crankcase disassembly 1……………………………………………………………………………………………………………………………………………………………………………………………………………
45
Disassemble the right crankcase parts
8.2
Right crankcase disassembly 2……………………………………………………………………………………………………………………………………………………………………………………………………………
46
Disassemble the right crankcase parts
8.3
After-sales parts description………………………………………………………………………………………………………………………………………………………………………………………………………………
47
Right crankcase sub-assembly, right crankcase assembly
99- Left crankcase assembly
9.1
Left crankcase disassembly 1………………………………………………………………………………………………………………………………………………………………………………………………………………
48
Disassemble left crankcase body parts
9.2
Left crankcase disassembly 2………………………………………………………………………………………………………………………………………………………………………………………………………………
49
Disassemble left crankcase body parts
9.3
After-sales parts description………………………………………………………………………………………………………………………………………………………………………………………………………………
50
Left crankcase sub-assembly, left crankcase assembly
10 10- Speed change, transmission mechanism components
10.1
Positional relationship of speed change and transmission mechanism components…………………………………………………………………………………………………………………………
51
Positional relationship of speed change and transmission mechanism components
10.2
Spindle assembly relationship……………………………………………………………………………………………………………………………………………………………………………………………………………
52
Spindle assembly relationship
10.3
Countershaft assembly relationship……………………………………………………………………………………………………………………………………………………………………………………………………
53
Countershaft assembly relationship
©Guangdong Daye Motorcycle Technology Co., Ltd.
This manual is suitable for ZT180MN series engines. All the materials, illustrations, photos, etc. collected in this manual are compiled according to the latest
products. However, due to the continuous improvement of the product and other changes, there may be some inconsistencies between your engine and this

1- The steps of draining oil
5
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
21244100-033000 Combined sealing gasket 12×φ20×2 2
31251100-066093 M12×1.5×15 ablassschraube (color Zinc) 224±4N.m
Fig.1 PREPARATION
STEPS
Draining oil
PROCEDURE:
●Discharge the oil
Park the vehicle on a level surface with the side stand.
Unscrew the oil plug ⑴by turning it counterclockwise.
It is recommended to remove the lower shroud before draining the oil. If it is not
removed, it is recommended to use a tool to guide the flow, so as to prevent the oil from
contaminating the cover.
Place the oil pan under the engine oil drain bolt as shown in the middle left picture.
Use a 14# sleeve to remove the oil drain bolt (3) of the engine, remove the gasket (2), and
empty the old oil.
CAUTION：
●Combined gasket ⑵It is recommended to replace it after disassembly to avoid oil leakage
and oil leakage due to damage caused during disassembly.
●The lower shroud needs to be removed first.
●Waste engine oil should be uniformly recycled and then handed over to qualified
institutions for disposal; it is forbidden to dump polluting the environment or water sources
at will.
●It is recommended to replace the oil drain bolt and combined gasket every time the oil is
changed.
11051161-012000 M24×2 oil filler plug 1

2-CYLINDER HEAD ASSEMBLY
6
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
11251112-002093 M6×30 Hexagon flange bolts (color zinc) 812±1.5N.m
21251112-003093
M6×45 Hex flange surface 9.8 bolt (color
212±1.5N.m
41051658-002000 ZT184MN Cylinder head cover gasket 1
51251401-001000 φ8×14 hollow locating pin 1
Fig.1 CYLINDER HEAD
ASSEMBLY
Remove the cylinder head cover assembly 1
31250205-023000
GB70.1 inner hexagonal M8X35
(environmental color)
112±1.5N.m
PROCEDURE:
●Cylinder head cover assembly
Use an 8# sleeve to remove 2 bolts ⑴and 8 bolts ⑵, and remove 1 bolt ⑶for 6# inner
hexagon, then the cylinder head cover assembly can be removed.
Take out the gasket ⑷,
Take out the hollow positioning pin ⑸.
Notice:
●The cylinder head cover bolts must be evenly loosened or tightened diagonally when
removing and installing.
●Gasket ⑷is for one-time use, and must be replaced after disassembly, otherwise the seal
will not be in place and problems such as engine oil leakage will occur.
●Before installing new gaskets, it is necessary to clean the sealant on the assembly plane
on the cylinder head and the cylinder head cover to prevent problems such as oil leakage
from the engine caused by uneven assembly planes, and foreign matter should be avoided
when cleaning impurities such as residual sealant. into the engine.
●When installing a new gasket, it is necessary to apply an appropriate amount of sealant
on the assembly plane of the cylinder head and the upper surface of the gasket.

2-CYLINDER HEAD ASSEMBLY
7
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
14050758-001000 ZT184MP Cylinder head cover 1
21251513-001019 6.3×12×1.6 copper gasket 1
31251100-067093 M6×10 top pin bolt (color zinc) 112±1.5N.m
41050154-034000 ZT180MN timing chain plate 1
Fig.2 CYLINDER HEAD
ASSEMBLY
Remove the cylinder head cover assembly 2
PROCEDURE:
●Disassemble the cylinder head cover assembly
Use the 8# sleeve to remove the bolt (3), and remove the copper pad (2);
Take out the timing chain guard ⑷from under the cylinder head cover ⑴.
Notice:
●The bolts (3) are used to check whether the oil is on the cylinder. Generally, it is not
necessary to disassemble.

2-CYLINDER HEAD ASSEMBLY
8
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
14050956-003051 M30×1.5 aluminum screw plug (dark gray) 112±1.5N.m
21051454-023000
27.4×2.65 Hydrogenated nitrile rubber O-
1
31040953-002093
M14×1.5 plug screw (environmental color
112±1.5N.m
41051454-024000 13×2.8 Hydrogenated nitrile rubber O-ring 1
Align the timing chain
Fig.3 CYLINDER HEAD
ASSEMBLY
PROCEDURE:
●Remove the camshaft
Use 10# hexagon socket to remove the screw plug ⑴, and remove the O-ring ⑵.
Use 5# internal hexagon to remove the aluminum screw plug (3), and remove the O-ring
(4).
Use a 17# sleeve to extend from the aluminum screw plug ⑶, use the sleeve to turn the
flywheel bolt counterclockwise, so that the flywheel "T" dot-dash line coincides with the
center line of the small AC hole mark slot on the left cover.
Notice:
●When the "T" dashed line coincides with the marked line, the ends of the intake and
exhaust camshafts all face outward.
●The timing is before the tensioner is retracted and after the tensioner is placed.

2-CYLINDER HEAD ASSEMBLY
9
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
14051758-008000 ZT184MP intake camshaft sub-assembly 1
21050158-009000 3×27×19 slide tappet 4
34051758-009000 ZT184MP exhaust camshaft sub-assembly 1
Fig.4 CYLINDER HEAD
ASSEMBLY
Adjust valve clearance
PROCEDURE:
●Adjust the valve clearance
Rotate the intake and exhaust camshafts so that the base circle of the intake and exhaust
camshafts is directly on the tappet, and the camshaft can rotate flexibly.
Use a feeler gauge to measure the valve clearance.
Standard interval of intake valve clearance: 0.13-0.19mm
Standard interval of exhaust valve clearance: 0.24-0.30mm
If it does not meet the standard, remove the intake and exhaust camshafts, take out the
tappet, and replace the valve clearance adjustment pad under the tappet.
After the replacement is completed, measure the valve clearance with a feeler gauge
again, the adjustment is successful if it is qualified, otherwise continue to replace the valve
clearance adjustment pad.
Notice:
●When measuring the clearance of the right exhaust valve, you need to rotate the
pressure reducing mechanism by hand until it is fully opened before measuring.
●The adjusting pad needs to be placed in place, and the cylinder head cannot be tilted or
dumped after adjusting the valve clearance; Camshaft lock can be used to prevent the
adjustment pad from dislocation.

2-CYLINDER HEAD ASSEMBLY
10
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
11050153-005000 ZT173YMM cylinder head sealing cap parts 2
21251401-001000 φ8×14 hollow locating pin 112±1.5N.m
31051454-027000 7.5×1.5 Hydrogenated nitrile rubber O-ring 1
41251112-002093 M6×30 Hexagon flange bolts (color Zinc) 2
51051253-003000 30×38 tensioner parts 112±1.5N.m
61051253-004000 30×38 Washer, tensioner 1
71251100-067093 M6×10 top pin bolt (color Zinc) 1
81251513-001019 6.3×12×1.6 copper gasket 1
Fig.5 CYLINDER HEAD
ASSEMBLY
Remove camshaft 1
PROCEDURE:
●Seal cap
The sealing cap (1) is generally not damaged and does not require maintenance. If oil seeps
there, it needs to be replaced.
Pull out by hand and lift out the 2 sealing caps (1) at the cylinder head. Before installing the
sealing cap (1), it is necessary to clean up the residual sealant on the assembly plane of the
cylinder head. Apply an appropriate amount of sealant to the place ①on the new sealing
cap (1) and then install it to the appropriate place on the cylinder head.
●Remove the tensioner assembly
Use an 8# sleeve to remove 2 bolts ⑷, and take out the tensioner ⑸and washer ⑹.
When installing the tensioner, you need to use an 8# sleeve to remove the bolt ⑺, take
out the copper washer ⑻, insert the tool into the hole where the bolt ⑺is installed, and
rotate it clockwise to retract the tensioner top rod, and then install the tensioner ⑸back to
the engine superior.
CAUTION：
●Before installing the new sealing cap, the sealant on the assembly plane of the cylinder
head needs to be cleaned to prevent the engine from oil seepage caused by uneven
assembly plane. When cleaning impurities such as residual sealant, avoid foreign matter
from entering the engine.
●Gasket ⑸is for one-time use, and must be replaced after disassembly, otherwise the seal
will not be in place and problems such as engine oil leakage will occur.

2-CYLINDER HEAD ASSEMBLY
11
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
2
ZT180MN intake camshaft left seat cover
1
3
ZT180MN intake camshaft middle seat cover
1
6
ZT180MN exhaust camshaft left seat cover
1
74051758-009000 ZT184MP exhaust camshaft sub-assembly 4
84051758-008000 ZT184MP intake camshaft sub-assembly 4
9φ8×14 hollow locating pin 10
【
1
】
Fig.6 CYLINDER HEAD
ASSEMBLY
Remove camshaft 2
1
M6×45 Hexagon Flange Face 9.8 Bolts
(Environmentally Friendly Color Zinc)
12
PROCEDURE:
●Camshaft assembly
Use 8# cylinder to remove 12 bolts (1), torque standard: 12±1.5N.m, remove camshaft pressing
blocks ⑵, ⑶, ⑷, ⑸, ⑹, do not take out the positioning pin ⑼.
Pull the timing chain by hand, take off the intake camshaft assembly ⑻, and then take off the
exhaust camshaft assembly⑺. The timing chain does not need to be taken out at this time, just put it
back inside the engine.Be careful when you put it inside, you can't turn to the crankshaft anymore.
Notice:
●When installing, it is necessary to apply an appropriate amount of oil on the positioning pin.
●【1】Parts not marked with codes are included in the parts assembly and are not sold
separately.Only assembly relationships are represented here.
●"EX" means out of air, "IN" means air in, "L" means left seat, and "M" means middle seat. Be
careful not to install it wrongly.Can't turn left or right
●The positioning pin ⑼needs to be put back to the corresponding position of the cylinder head and
cannot be misplaced.
●When installing, apply a proper amount of oil to the corresponding position of the camshaft,
install the exhaust camshaft first, and then install the intake camshaft.
●The bolts of the camshaft seat cover must be tightened diagonally, otherwise it will damage the
cylinder head, seat cover and camshaft.
12±1.5N.m
【1】
4
Intake and exhaust camshaft right seat cover
blank
1
5
ZT180MN exhaust camshaft middle seat
cover blank
1

2-CYLINDER HEAD ASSEMBLY
12
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
11251112-002093 M6×30 Hexagon flange bolts (color Zinc) 112±1.5N.m
31251300-052094 M10×1.25 cap nut (12 grade / oxidized 460±5N.m
41251500-041000 10.3×20×2 gasket 4
Fig.7 CYLINDER HEAD
ASSEMBLY
Remove the cylinder head 1
21251112-024000
M8×1×117 Hexagon Flange Bolts (Grade
10.9/Oxidized Black) 223±2N.m
PROCEDURE:
●Remove the cylinder head
Use 8# torx wrench to remove 1 bolt (1) connecting the cylinder and the cylinder head.
Use an 8# sleeve to remove the 2 bolts in the cylinder head (2).
Use a 14# sleeve to remove the 4 nuts (3) in the cylinder head, and remove the gasket (4).
Notice:
●The bolt ⑵is for one-time use, and must be replaced every time it is disassembled.
Failure to replace it may cause problems with the airtightness of the cylinder and the
cylinder head.
●Prevent foreign objects from falling into the engine during disassembly and installation.
●Nuts (3) must be evenly loosened diagonally, and each nut must be loosened 1/3 at a
time, and then removed after all the nuts are completely loosened.
●The nut ⑶needs to apply lubricating oil on the thread of the nut before installation.
When installing, it needs to be tightened diagonally evenly in 4 times, the first time is
15N.m, the second time is 30N.m, the third time is 45N.m, and the fourth time is 60N.m.

2-CYLINDER HEAD ASSEMBLY
13
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
11051301-052000 Locating pin 12×20 2
21051658-001000 ZT184MP cylinder head gasket components 1
Fig.8 CYLINDER HEAD
ASSEMBLY
Remove the cylinder head 2
PROCEDURE:
●Remove the cylinder head
Take out the cylinder head assembly vertically upwards, and remove the positioning pin
(1) and gasket (2).
Notice:
●The gasket ⑵is for one-time use and must be replaced after disassembly.
●When removing and installing the cylinder head assembly, Pay attention to tension bars
and guide bars.
●When removing and installing the cylinder head assembly, avoid foreign matter from
entering the engine.

2-CYLINDER HEAD ASSEMBLY
14
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
11251112-001093 M6×16 Hexagon flange bolts (color Zinc) 2
21051954-001000 ZT180MN Outlet pipe subassembly 1
31051454-007000 19×2.65 EPDM O-ring 1
41050954-003000 communal sensor of water and oil 1
51051454-009000 9×2 EPDM O-ring 1
8Φ8×7.5 oil plug 2
71251111-011000
AYM8-M8×38 double head 10.9 studs
bolts(environmental color Zinc)
6
LDK9RTIP-8 sparking plug(calorific value 8
clearance 0.8 iridium platinum)
1
Remove the cylinder head 3
Fig.10CYLINDER HEAD
ASSEMBLY
2
PROCEDURE:
●Cylinder head assembly
Use an 8# sleeve to remove the 2 bolts (1), and remove the outlet pipe (2) and O-ring (3).
Use a 17# sleeve to remove the sensor ⑷, and remove the O-ring ⑸.
Use the spark plug special sleeve to remove the spark plug ⑹.
The double-ended stud ⑺does not need to be disassembled under normal circumstances.
If there are special circumstances such as stud slippage, you can weld the nut on the stud
and then use the corresponding sleeve to remove the double-ended stud ⑺.
The oil plug ⑻cannot be disassembled, and the oil plug ⑻is press-fitted by interference.
Reassembly after disassembly will cause oil leakage and oil leakage in the cylinder head.
Notice:
●Apply appropriate amount of thread glue to the thread of the bolt (1) during installation.
●O-rings (3) and (5) are for one-time use. If they are removed, they must be replaced.
Failure to replace it may cause problems such as water leakage.
●When installing the stud ⑺, apply a proper amount of thread tightening glue to the short
end of the thread before installing.

2-CYLINDER HEAD ASSEMBLY
15
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
11050161-021000 3×27×19 sliding tappet 4
21050154-020000 φ 8.85 valve clearance adjusting pad 4
31050158-008000 ZT184MP Valve lock clamp 8
41050154-016000 ZT180MN Valve spring ring 4
51050154-039000 ZT180MN valve outer spring A 4
61050158-001000 ZT184MP valve inner spring 4
71050153-015000 16.5×23.5×1 valve spring seat 4
81051553-001000 Φ5.0 valve stem diameter oil seal 4
91050158-006000 ZT184MP Intake valve 2
10 1050158-007000 ZT184MP Exhaust valve 2
PROCEDURE:
●Check valve tightness
Before disassembling the valve spring, check the valve sealing performance; if there is
slight leakage at the valve, it is normal and no disassembly is required; if the leakage is
serious, the valve or cylinder head assembly needs to be disassembled and replaced. If the
engine burns oil, it is necessary to disassemble and replace the valve oil seal, otherwise it is
not necessary to disassemble.
Check air tightness: Close the intake valve and exhaust valve, and pour the gasoline directly
from the intake port and exhaust port. If the gasoline seeps out slightly, it means the seal is
normal. If the gasoline flows out directly, it means the seal is not in place and needs to be
replaced. Install the valve oil seal.
●Remove valve assembly
Take out the sliding tappet (1) and remove the adjusting pad (2);
Use a valve remover or other suitable tool to press down the upper spring ring ⑷and then
remove the two valve lock clips ⑶, and take out the outer spring ⑸, inner spring ⑹, spring
seat ⑺, valve oil seal ⑻, intake valve ⑼in sequence;
Use the same method to remove the other valves.
Notice:
●Apply an appropriate amount of oil to all the parts to be installed during installation.
●Oil seal ⑻is for one-time use and must be replaced after disassembly; oil seal ⑻needs
Fig.11 CYLINDER HEAD
ASSEMBLY
valve assembly

2-CYLINDER HEAD ASSEMBLY
16
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
14050658-004000 ZT184MP cylinder head sub-assembly 1
34050658-009000 ZT184MP cylinder head valve sub-assembly 1
44050658-005000 ZT184MP cylinder head assembly 1
PROCEDURE:
●Cylinder head sub-assembly
Cylinder head assembly (1) includes cylinder head assembly, valve assembly, camshaft
assembly, stud sub-assembly, etc.
●Cylinder head valve camshaft sub-assembly
Cylinder head valve camshaft sub-assembly (2) includes valve assembly, intake camshaft
sub-assembly and exhaust cam sub-assembly.
●Cylinder head valve sub-assembly
The cylinder head valve sub-assembly (3) includes the cylinder head exhaust pipe stud sub-
assembly, intake valve, exhaust valve and other components.
●Cylinder head exhaust pipe double-ended stud sub-assembly
The cylinder head exhaust pipe double-ended stud sub-assembly ⑷includes the cylinder
head camshaft seat cover sub-assembly, M8-M8×38 double-ended 10.9-grade stud
(environmentally friendly color zinc) and other parts.
Notice:
●Please check the status of parts before placing an order and place an order according to
your own needs.
●ZT184MPThe gasket of the cylinder head cover is a one-time seal and needs to be
replaced every time it is disassembled. It is recommended to purchase it together.
24050658-008000
ZT184MP cylinder head valve camshaft sub-
assembly
1After-sale
Fig.12 CYLINDER HEAD
ASSEMBLY
After-sales parts description

3-CYLINDER BLOCK ASSEMBLY
17
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
11050158-005000 ZT184MP guide strip
1
Fig.1 CYLINDER BLOCK
ASSEMBLY
Remove the guide bar
PROCEDURE:
●Guide Strip
Pull out the guide bar ⑴in the direction of the arrow.
Notice:
●When installing the guide bar, the guide bar needs to be clamped to the position shown
in the lower left.
●Prevent foreign objects from falling into the engine during disassembly and installation.

3-CYLINDER BLOCK ASSEMBLY
18
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
14050558-004000 ZT184MP Cylinder body assembly
1
21051658-007000
ZT184MP Cylinder body gasket (foam rubber)
1
31251401-001000 φ8×14 hollow locating pin
1
41051161-003000 GB119.2 φ9×14 cylindrical pin
1
PROCEDURE:
Take the cylinder assembly out vertically, remove the gasket ⑵, positioning pins
⑶,cylindrical pin⑷, and clean the remaining sealant on the joint surface.
Notice:
●The gasket ⑵are for one-time use and must be replaced after disassembly, otherwise
there will be oil leakage and water leakage.
●Check the inner wall of the cylinder. If there are obvious scratches or damages on the
inner wall of the cylinder, it must be replaced.
●Before installing the cylinder,make sure that the box and cylinder assembly planes are
smooth and flat and apply a proper amount of sealant on the box assembly plane.After
installing the new gasket, apply a proper amount of sealant on the upper surface of the new
gasket.
●Prevent foreign objects from falling into the engine during disassembly and installation.
●Before installing the cylinder, apply a proper amount of engine oil to the inner wall of the
cylinder as lubrication.
Fig.2 CYLINDER BLOCK
ASSEMBLY
Cylinder block assembly

3-CYLINDER BLOCK ASSEMBLY
19
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
11051954-007000 ZT180MN Inlet and outlet pipe connector
1
34050558-001000 ZT184MP Cylinder body
1
Fig.3 CYLINDER BLOCK
ASSEMBLY Cylinder block assembly
PROCEDURE:
●Disassemble the cylinder
Use a 24# sleeve to remove the water pipe joint and take out the O-ring.
●Match cylinder and piston
Due to tolerances in the manufacture of cylinders and pistons, our company divides the
corresponding tolerances into 3 groups, namely A", "B" and "C". Which group, the cylinder
of group "A" can only buy the piston of group "A", if the purchased cylinder or piston group
is wrong, it may cause problems such as engine pulling cylinder. "
Notice:
●O-ring is a one-time item, and each disassembly will cause different degrees of damage to
it, and it must be replaced every time it is disassembled, otherwise there will be water
leakage and other phenomena.
21051454-008000
19×1.5 ethylene propylene terpolymer O
shape circle 1