Zontes ZT180MN User manual

ZT180MN Engine EuroIV_V
Maintenance Manual
2021/4/19

Page 1 ，Toatal 54 Pages
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0
Table of Contents……………………………………………………………………………………………………………………………………………………………………………………………
1
11- The steps of draining oil and antifreeze before disassembling the engine
1.1
Draining oil-1……………………………………………………………………………………………… ………………………………………………………………………………………… ……
5
1.2
Draining oil-2……………………………………………………………………………………………… ………………………………………………………………………………………… ……
6
1.3
Drain antifreeze……………………………………………………………………………………………… ………………………………………………………………………………………… …
7
22-Cylinder head assembly
2.1
Cylinder head cover assembly……………………………………………………………………………………………… ………………………………………………………………………………
8
Cylinder head cover assembly
2.2
Disassembling the camshaft-1…………………………………………………………………………………………………… …………………………………………………………………………
9
Tensioner assembly, sealing cap assembly
2.3
Disassembly of camshaft-2………………………………………………………………………………………… ………………………………………………………………………………………
10
Disassemble camshaft
2.4
Disassembling the camshaft-3……………………………………………………………………………………………… ………………………………………………………………………………
11
Camshaft assembly
2.5
Cylinder head assembly-1…………………………………………………………………………………………………… ………………………………………………………………………………
12
Remove the cylinder head
2.6
Cylinder head assembly-2……………………………………………………………………………………………… ……………………………………………………………………………………
13
Remove the cylinder head
2.7
Cylinder head assembly-3……………………………………………………………………………………………… ……………………………………………………………………………………
14
Cylinder head assembly
2.8
Disassembling the valve……………………………………………………………………………………………… ……………………………………………………………………………………
15
Valve assembly
2.9
Adjust the valve clearance……………………………………………………………………………………………… ……………………………………………………………………………………
16
2.10
Description of after-sales parts………………………………………………………………………………………………………… ……………………………………………………………………
17
33-cylinder block assembly
3.1
Disassembling the guide bar……………………………………………………………………………………………… …………………………………………………………………………………
18
Guide bar
3.2
Cylinder block assembly……………………………………………………………………………………………… ……………………………………………………………………………………
19
Cylinder assembly
3.3
Disassemble the piston……………………………………………………………………………………………… ………………………………………………………………………………………
20
Piston assembly
Table of Contents
Contents

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Table of Contents
Contents
3.4
Description of after-sales parts………………………………………………………………………………………………………… ……………………………………………………………………
21
44-right crankcase cover assembly
4.1
ZT180MN right crankcase cover assembly-1……………………………………………………………………………… ………………………………………………………………………………
22
Remove the right crankcase cover
4.2
ZT180MN right crankcase cover assembly-2……………………………………………………………………………………… ………………………………………………………………………
23
Fine filter assembly, oil dipstick
4.3
Disassembling the water pump assembly-1…………………………………………………………………………………………………… ……………………………………………………………
24
Outlet pipe joint, water pump cover assembly
4.4
Disassembling the water pump assembly-2……………………………………………………………………………………………… …………………………………………………………………
25
Water pump components
4.5
Disassembling the water pump assembly-3……………………………………………………………………………………………… …………………………………………………………………
26
Bearing and oil seal assembly
4.6
Remove the noise reduction component of the right cover…………………………………………………………………………………………………… ……………………………………………
27
Right cover noise reduction component
4.7
Disassembling the clutch lever………………………………………………………………………………………………………… ……………………………………………………………………
28
Clutch lever assembly
4.8
Right cover bearing and oil seal………………………………………………………………………………………… …………………………………………………………………………………
29
Right cover bearing and oil seal parts
4.9
Right cover parts……………………………………………………………………………………………… ………………………………………………………………………………………… …
30
Right cover parts
4.10
Clutch assembly-1……………………………………………………………………………………………… …………………………………………………………………………………………
31
Clutch assembly
4.11
Clutch assembly-2……………………………………………………………………………………………… …………………………………………………………………………………………
32
Friction plate assembly
4.12
Clutch assembly-3……………………………………………………………………………………………… …………………………………………………………………………………………
33
Clutch master and driven disc assembly
55-Left crankcase cover assembly
5.1
Disassembling the reduction gear……………………………………………………………………………………………… ……………………………………………………………………………
34
Reduction gear assembly
5.2
Disassembling the starter motor……………………………………………………………………………………………… ……………………………………………………………………………
35
Starter motor components
5.3
Remove left crankcase cover assembly…………………………………………………………………………………………………… …………………………………………………………………
36

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Table of Contents
Contents
Remove the left cover assembly
5.4
Disassembling the magneto stator……………………………………………………………………………………………… ……………………………………………………………………………
37
Magneto stator assembly
5.5
Left cover parts……………………………………………………………………………………………… ………………………………………………………………………………………… ……
38
Screw plug assembly
66-Right crankshaft body case assembly (1)
6.1
Oil pump assembly……………………………………………………………………………………………… …………………………………………………………………………………………
39
Disassemble the oil pump assembly
6.2
Right box assembly-1………………………………………………………………………………………………………… ……………………………………………………………………………
40
Remove the driving sprocket, remove the shifting star wheel
77-Left crankcase assembly (1)
7.1
Disassemble the bridge teeth and the magneto rotor……………………………………………………………………………………………… …………………………………………………………
41
Electric bridge gear assembly, magneto rotor assembly
7.2
Disassemble the large starting gear and the output sprocket……………………………………………………………………………………………… …………………………………………………
42
Start big gear assembly, output sprocket assembly
7.3
Remove the gear switch……………………………………………………………………………………………… ………………………………………………………………………………………
43
Gear switch assembly
88-Crankcase disassembly
8.1
Crankcase disassembly-1…………………………………………………………………………………………………… ………………………………………………………………………………
44
8.2
Crankcase disassembly-2………………………………………………………………………………………………………… …………………………………………………………………………
45
8.3
Crankcase disassembly-3………………………………………………………………………………………………………… …………………………………………………………………………
46
8.4
Crankcase disassembly-4………………………………………………………………………………………………………… …………………………………………………………………………
47
99-Right crankshaft case assembly (2)
9.1
Right cabinet assembly-2………………………………………………………………………………………………………… …………………………………………………………………………
48
Tensioner assembly, stop wheel assembly, coarse filter, oil and gas baffle
9.2
Right box assembly-3…………………………………………………………………………………………………… …………………………………………………………………………………
49
Spindle bearing baffle, bearing spare parts and after-sales parts
10 10-Left crankcase assembly (2)
10.1
Left crankcase parts……………………………………………………………………………………………… …………………………………………………………………………………………
50

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Contents
10.2
After-sales spare parts for left crankcase………………………………………………………………………………………… …………………………………………………………………………
51
11 11- Gearshift and transmission mechanism components
11.1
The position relationship of the components of the speed change and transmission mechanism…………………………………………………………………………………… ………………………
52
11.2
Spindle assembly relationship……………………………………………………………………………………………… ………………………………………………………………………………
53
11.3
Countershaft assembly relationship……………………………………………………………………………………………… …………………………………………………………………………
54
©Guangdong Daye Motorcycle Technology Co., Ltd.
all rights reserved
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 manual.

1-PREPARATION STEPS
5
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1251100-066093 M12×1.5×15 oil drain bolt (color zinc) 2 25±4N.m
2 1244100-033000 Combined sealing gasket12×φ20×2 2
3 1050854-002000 ZT180MN oil level gauge 1
4 1051454-003000 15×3.1 acrylate adhesive O
－
ring 1
Fig.1 PREPARATION
STEPS Draining oil-1
PROCEDURE:
●Drain oil
Place a larger container under the engine, use 14 sleeve + ratchet wrench to remove the 2 oil drain bolts at the
bracket and the left crankcase (1), and remove the gasket (2).
Unscrew the oil dipstick (3) on the right crankcase cover, take out the sealing ring (4), and wait for the oil to
drain from the oil drain.
CAUTION：
●Combined gasket ⑵It is recommended to replace it after disassembly to avoid oil leakage and oil leakage due
to damage caused during disassembly.
●After removing the oil drain bolt ⑴, check whether the magnet on the bolt has adsorbed iron filings. If there
are many foreign objects or parts adsorbed, check the inside of the engine. If there is only a small amount of
metal chips, don't worry, just clean it up.
●Draining oil and antifreeze can only be done when the machine is cold to prevent burns.

1-PREPARATION STEPS
6
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1Oil outlet pipe of engine 1
2Oil inlet pipe of engine 1
3 1251100-061093 M6×22 Hex flang bolt thread level 8.8 (color zinc) 2 12±1.5N.m
4 1051454-014000 9.8×2.5 acrylic o
－
ring 2
Fig.2 PREPARATION
STEPS Draining oil-2
【1】
PROCEDURE:
●Drain oil
Use an 8# sleeve to remove the 2 bolts ⑶ on the engine oil outlet pipe ⑴ and the engine oil inlet pipe ⑵, and
remove the O-ring ⑷.
Wait for the oil to flow out.
CAUTION：
●【1】Because there may be multiple states for different models, colors, status changes, etc., only the name is
reserved here, and the corresponding correct state can be found in the official website parts. Similar situations
will not be repeated in the follow-up.
●
O-rings are recommended to be replaced after disassembly to avoid oil leakage and oil leakage due to improper
seals caused by damage during disassembly.

1-PREPARATION STEPS
7
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1251112-001093 M6×16 Hexagon flange bolts (color zinc) 1 12±1.5N.m
2 1251513-001019 6.3×12×1.6 copper gasket 1
PROCEDURE:
●Put antifreeze
Place a container under the drain hole, ready to receive antifreeze, use an 8# sleeve to remove the bolt (1), and
remove the copper pad (2).
Locate the water filler cap at the lower link plate on the right side of the vehicle, press down the water filler cap
and turn it counterclockwise before removing it, and wait for the antifreeze to drain.
CAUTION:
●Gasket ⑵After disassembly, new gaskets must be replaced to avoid water leakage.
●Antifreeze is corrosive to a certain extent, so be careful not to contaminate the engine, other parts, body,
clothing, etc., when discharging the antifreeze. If parts are accidentally contaminated with antifreeze,
immediately wipe them with a clean lint-free cloth. If clothing or skin is stained with antifreeze, immediately
rinse with clean water. If the antifreeze is splashed into the eyes, immediately rinse with plenty of water and
observe to decide whether to seek medical attention.
●The engine can be removed from the vehicle after draining the antifreeze and engine oil.
Fig.3 PREPARATION
STEPS Drain antifreeze

2-CYLINDER HEAD ASSEMBLY
8
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1251112-003093 M6×45 Hex flange surface 9.8 bolt (color zinc) 2 12±1.5N.m
2 1251112-002093 M6×30 Hexagon flange bolts (color zinc) 8 12±1.5N.m
3 1250205-023000 GB70.1 inner hexagonal M8X35 (environmental color) 1 21±1.5N.m
4 1051654-001000 ZT180MN Cylinder head cover gasket 1
5 1251401-001000 φ8×14 hollow locating pin 2
6 1051454-001000 7.5×1.5 Fluorine O
－
ring 1
7 1251401-003000 Φ10×14 hollow positioning pin 1
8 1251100-067093 M6×10 top pin bolt (color zinc) 1 12±1.5N.m
9 1251513-001019 6.3×12×1.6 copper gasket 1
10 1050154-034000 ZT180MN timing chain plate 1
11 1040754-001000 ZT180MN Cylinder head cover 1
Cylinder head cover assembly
PROCEDURE:
●Cylinder head cover assembly
Use an 8# sleeve to remove 2 bolts ⑴ and 8 bolts ⑵, and remove 1 bolt ⑶ for 6# inner hexagon, then the
cylinder head cover assembly can be removed.
Take out the gasket ⑷, remove one large positioning pin ⑺ and two small positioning pins ⑸. Note: One of
the small positioning pins ⑸ has an O-ring ⑹. Clean up the remaining sealant on the joint surface.
Remove the bolt ⑻ with an 8# sleeve, and remove the copper pad ⑼.
Remove the chain guard ⑽ from the inside of the cylinder head cover ⑽, and install the chain guard ⑽ on the
boss shown in the circle in the figure.
CAUTION：
●
When installing a new gasket, apply a proper amount of sealant on the assembly plane of the cylinder head and
the upper surface of the gasket.
●The cylinder head cover bolts must be evenly loosened or tightened diagonally when removing and installing.
●Gasket ⑷ is 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.
●When cleaning residual sealant and other impurities, avoid foreign matter from entering the engine.
Fig.1 CYLINDER HEAD
ASSEMBLY

2-CYLINDER HEAD ASSEMBLY
9
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1251100-067093 M6×10 top pin bolt (color zinc) 1 12±1.5N.m
2 1251513-001019 6.3×12×1.6 copper gasket 1
3 1251112-002093 M6×30 Hexagon flange bolts (color zinc) 2 12±1.5N.m
4 1051253-003000 30×38 tensioner parts 1
5 1051253-004000 30×38 Washer, tensioner 1
6 1050153-005000 Cylinder head sealing cap parts 2
Disassembling the camshaft-1
PROCEDURE:
●Tensioner assembly
Use an 8# sleeve to remove the bolt ⑴, and take out the copper pad ⑵.
Use an 8# sleeve to remove the 2 bolts (3), and use the tensioner disassembly tool to remove the tensioner ⑷
and gasket ⑸.
●Sealing cap assembly
When installing the sealing cap ⑹, a proper amount of sealant should be applied at ① to prevent oil leakage.
CAUTION：
●Gasket ⑸ is 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.
●When removing the tensioner, it is necessary to use the tensioner removal tool. Disassembly tooling is included
when purchasing the tensioner assembly. The tooling is as follows:
Fig.2 CYLINDER HEAD
ASSEMBLY

2-CYLINDER HEAD ASSEMBLY
10
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1040953-002093 M14×1.5 plug screw (environmental color zinc) 1
2 1051453-009000 O
－
ring 13×2.8 1
3M30×1.5 aluminum screw plug 1
4 1051453-003000 27.4×2.65 Acrylate rubber o
－
rings 1
Disassembly of camshaft-2
Fig.3 CYLINDER HEAD
ASSEMBLY
PROCEDURE:
●Remove the camshaft
Use 5# hexagon socket to remove the screw plug ⑴, and remove the O-ring ⑵.
Use 10# 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.
CAUTION：
●
When the "T" dashed line coincides with the marked line, the ends of the intake and exhaust camshafts all face
outward.

2-CYLINDER HEAD ASSEMBLY
11
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1M6×45 Hex flange surface 9.8 bolt (color zinc) 12
2Intake and exhaust camshaft right seat cover blank 1
3ZT180MN intake camshaft middle seat cover blank 1
4ZT180MN intake camshaft left seat cover blank 1
5ZT180MN exhaust camshaft middle seat cover blank 1
6ZT180MN exhaust camshaft left seat cover blank 1
7 φ8×14 hollow locating pin 10
8 1050154-042000 ZT180MN intake camshaft sub
－
assembly 1
9 1050154-043000 ZT180MN exhaust camshaft sub
－
assembly 1
10 1050154-033000 6.35×9×130 gear chain 1
【1】
Fig.4 CYLINDER HEAD
ASSEMBLY Disassembling the camshaft-3
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 ⑺.
Remove the intake camshaft assembly ⑻ first, and then remove the exhaust camshaft assembly ⑼. The timing
chain does not need to be taken out at this time, just put it back into the engine.
CAUTION：
●【1】Parts not marked with codes are included in the parts assembly and are not sold separately.
●"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.
●The positioning pin ⑺ needs 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.

2-CYLINDER HEAD ASSEMBLY
12
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1251112-002093
M6×30 Hexagon flange bolts (color zinc) 1 12±1.5N.m
2 1251112-010000
M8×110 Hexagonal flange Level 9.8 bolt(color zinc) 2 25±1.5N.m
3 1251300-052094
M10×1.25 cap nut (12 grade / oxidized black) 4 60±1.5N.m
4 1251500-041000
10.3×20×2 gasket 4
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).
CAUTION：
●The bolt ⑵ is 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.
●Nut (3) Before installation, lubricating oil should be applied to the thread of the nut, and the installation also
needs to be evenly tightened diagonally in 3 times.
Fig.5 CYLINDER HEAD
ASSEMBLY
Cylinder head assembly-1

2-CYLINDER HEAD ASSEMBLY
13
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1051301-052000
Locating pin 12×20 2
2 1051654-006000
Cylinder body and head gasket subassembly A 1
Fig.6 CYLINDER HEAD
ASSEMBLY
Cylinder head assembly-2
PROCEDURE:
●Remove the cylinder head
Take out the cylinder head assembly vertically upwards, and remove the positioning pin (1) and gasket (2). The
gasket ⑵ is for one-time use and must be replaced after disassembly.
CAUTION：
●When removing and installing the cylinder head assembly, pay attention to the guide bar.
●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
1 1251112-001093
M6×16 Hexagon flange bolts (color zinc) 2 12±1.5N.m
2 1051954-001000
ZT180MN Outlet pipe subassembly 1
3 1051454-007000
19×2.65 EPDM O
－
ring 1
4 1050954-003000
Communal sensor of water and oil 1 13±1.5N.m
5 1051454-009000
9×2 EPDM O
－
ring 1
6 1050954-017000
LDK8RTIP
－
0.8 sparking plug 1 20±2N.m
7 1251111-011000 AYM8－M8×38 double head 10.9 stud bolts is deactivated
2 20±1.5N.m
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.
Use M8 double-end stud sleeve to remove the stud ⑺
. When installing, apply a proper amount of thread glue to
the thread of the stud ⑺ and the cylinder head.
①The oil plug at the place cannot be disassembled. Here is an interference fit. If disassembled and then
assembled, it will cause problems with the sealing of the cylinder head.
②The water plug at the place is also not removable. Special waterproof glue is applied to the threads here.
Disassembly and assembly may cause water leakage.
CAUTION：
●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 removing and installing the cylinder head assembly, avoid foreign matter from entering the engine.
●Check the spark plug thread and center electrode. If there is damage or deformation, replace the spark plug.
●The standard value of spark plug gap a is: 0.7-0.9mm, and it must be replaced if it exceeds the range.
Fig.7 CYLINDER HEAD
ASSEMBLY
Cylinder head assembly-3

2-CYLINDER HEAD ASSEMBLY
15
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1050154-032000
3×27 slide tappet 4
2 1050154-020000
φ 8.85 valve clearance adjusting pad 4
3 1050154-017000
ZT180MN Valve lock clamp 8
4 1050154-016000
ZT180MN Valve spring ring 4
5 1050154-039000
ZT180MN valve outer spring A 4
6 1050154-040000
ZT180MN valve inner spring A 4
7 1050153-015000
16.5×23.5×1 valve spring seat 4
8 1051553-001000
Φ5.0 valve stem diameter oil seal 4
9 1050154-012000
ZT180MN Intake valve A 2
10 1050154-013000
ZT180MN Exhaust valve A 2
PROCEDURE:
●Valve assembly
Remove the sliding tappet ⑴ and valve clearance adjustment cushion ⑵.
Squeeze the valve spring with a valve disassembler, remove the valve lock clamp (3), and remove the upper
spring ring ⑷, outer spring ⑸, inner spring ⑹, spring seat ⑺, oil seal ⑻, and intake valve ⑼ in sequence.
Use the same method to remove the other valves.
CAUTION：
●Oil seal ⑻ is for one-time use and must be replaced after disassembly; oil seal ⑻ needs to be press-fitted on
the boss on the valve guide; please go to a qualified maintenance organization for replacement.
●Install the valve spring with the close-spaced end facing down.
●When disassembling the valves, the 4 groups of dismantled valves should be marked so that they can be
installed back to their original positions.
Fig.8 CYLINDER HEAD
ASSEMBLY Disassembling the valve

2-CYLINDER HEAD ASSEMBLY
16
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1050154-043000
ZT180MN exhaust camshaft sub
－
assembly 1
2 1050154-032000
3×27 slide tappet 4
3 1050154-042000
ZT180MN intake camshaft sub
－
assembly 1
Fig.9 CYLINDER HEAD
ASSEMBLY Adjust the 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: 0.10-0.19mm
Standard interval of exhaust valve clearance: 0.15-0.28mm
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.
CAUTION：
●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.
●When installing the camshaft, apply a proper amount of engine oil to the camshaft.
●You can watch the detailed operation in "ZT310 Valve Clearance Adjustment Video".

2-CYLINDER HEAD ASSEMBLY
17
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 4050654-008000
ZT180MN cylinder head sub
－
assembly (Bosch) 1
2 4050654-004000
ZT180MN cylinder head assembly 1
3 4050654-001000
ZT180MN Cylinder head subassembly 1
PROCEDURE:
●Cylinder head sub-assembly
Cylinder head assembly (1) includes cylinder head assembly, valve assembly, camshaft assembly, etc.
●Cylinder head assembly
Cylinder head assembly (2) includes cylinder head assembly, valve assembly, excluding camshaft and other
components.
●Cylinder head sub-assembly
The cylinder head sub-assembly (3) only contains the cylinder head assembly.
CAUTION：
●Please check the status of parts before placing an order and place an order according to your own needs.
Fig.10 CYLINDER HEAD
ASSEMBLY Description of after-sales parts
After-sale

3-CYLINDER BLOCK ASSEMBLY
18
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1051254-004000
ZT180MN guide bar part B 1
PROCEDURE:
●Guide Strip
Pull out the guide bar ⑴ in the direction of the arrow.
CAUTION：
●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.
Fig.1 CYLINDER BLOCK
ASSEMBLY
Disassembling the guide bar

3-CYLINDER BLOCK ASSEMBLY
19
CHK
ADJ
NO. PART NO.
PART NAME QTY CAUTION
1 1051654-007000
ZT180MN Cylinder body gasket A 1
2 1051301-052000
Locating pin 12×20 1
3 1251401-001000
φ8×14 hollow locating pin 1
4 1051954-007000
ZT180MN Inlet and outlet pipe connector 1
5 1051454-008000
19×1.5 ethylene propylene terpolymer O shape circle 1
PROCEDURE:
●Cylinder assembly
Take the cylinder assembly out vertically, remove the gasket ⑴, positioning pins ⑵, ⑶, and clean the
remaining sealant on the joint surface.
Use 24# torx wrench to remove the outlet pipe joint ⑷, and take out the O-ring ⑸.
CAUTION：
●The gasket ⑴ and O-ring ⑸ are 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