Illustrated Parts Manual
Model Number:
P/N 27955
Rev 002
Date 11-13-07
THT-2520
HEDGETRIMMER
Nikko Tanaka Engineering U.S.A.,Ltd.• 1028 4th Street SW, Bldg B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
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PARTS INFORMATION
THT-2520
ENGINE / CYLINDER, PISTON, CRANKCASE, IGNITION • FIGURE 1
ITEM PART NUMBER
1-1
DESCRIPTION
CAP,SPARK PLUG ASS'Y
PLUG,SPARK
QTY
1
COMMENTS
1570650091
0181166021
0010660090
99416050201
0170650020
04101601200
0300660090
03701601200
03901620200
04606500801
99962081225
0720650090
09006500200
99966122206
99961600100
33000200210
33000200220
33000200230
33000200240
59900601200
1672153280
99416040226
99414050301
1552152380
99201080011
99210080012
99101080011
10002100200
25006500200
1780650080
1-2
1-3
1-4
1-7
1-8
1-9
1
1
2
1
2
1
1
2
1
1
1
1
2
2
V
V
V
V
1
1
2
3
1
1
1
1
2
1
1
SET,CYLINDER
Includes cylinder gasket
SCREW,5X20/WS
GASKET, CYLINDER
RING,PISTON
SET,PISTON
PIN,PISTON
Includes rings, and circlips
1-10
1-11
1-12
1-13
1-21
1-22
1-23
1-24
1-25
1-25
1-25
1-25
1-26
1-27
1-28
1-30
1-31
1-32
1-33
1-34
1-35
1-36
1-37
CIRCLIP,PISTON PIN
CRANKSHAFT
BEARING,NEEDLE,F-810
CRANKCASE ASS'Y
GASKET,CRANKCASE
SEAL,OIL,TC12227
BEARING,BALL,#6001
SHIM,12.2X19X.10
SHIM,12.2X19X.15
SHIM,12.2X19X.20
SHIM,12.2X19X.30
CUSHION
COIL,IGNITION
SCREW,WS,4X22
SCREW,5X30/S
ROTOR, MAGNETO
WASHER,8
WASHER,S,8
Crankcase assy includes bearings, seals
and gasket.
Shims are "as needed" to obtain
correct side clearance
NUT,8
BOLT,STUD,6X22
TUBE,INSULATOR
CORD,STOP COMPLETE
Page 2
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PARTS INFORMATION
THT-2520
CARBURETOR, FUEL TANK, FUEL SYSTEM • FIGURE 2
CARBURETOR
SEE FIG-3
Page 3
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PARTS INFORMATION
THT-2520
CARBURETOR, FUEL TANK, FUEL SYSTEM • FIGURE 2
ITEM PART NUMBER
2-3
DESCRIPTION
PROTECTOR,MUFFLER
GASKET,MUFFLER
SHIELD,HEAT
SET,MUFFLER
WASHER,5
QTY
1
COMMENTS
7380660020
73706500200
13306500200
7040650090
99201050011
99051050503
1120650080
78006097200
77406097200
8390201020
79806500900
2030604A202
78306097200
78506410200
99415040162
75106500200
7210661190
99434040081
40306500200
4040650090
99416050252
40206500200
99967015000
4230650081
47006500200
5280650T20
99204080030
47601700200
99210050012
99011050602
4460650020
4520660091
3800637C200
4550650090
4550651A90
2770634F900
2-4
2-5
2-6
2-7
1
1
1
2
2
1
1
1
1
1
1
1
1
3
1
1
2
1
1
2
1
1
1
2
1
1
1
2
2
1
1
1
1
1
1
2-8
BOLT,HEX,5X50
CASE,FAN
2-11
2-12
2-13
2-15
2-16
2-17
2-18
2-19
2-20
2-21
2-22
2-24
2-25
2-26
2-27
2-30
2-33
2-35
2-36
2-37
2-38
2-39
2-40
2-41
2-43
2-44
2-45
2-46
2-46
2-47
SPRING,RECOIL
PULLEY,STARTER
SCREW,SET
PULLEY,STARTER,ASS'Y
GROMMET
ROPE,STARTER
HANDLE,STARTER
SCREW,PS,4X16
GASKET,MUFFLER
SET,TAIL PIPE
SCREW,4X8/S
GASKET,INTAKE
SET,CARB INSULATOR
SCREW,5X25WS
GASKET,CARBURETOR
O-RING,P15
BODY,CLEANER
COLLAR
LEVER,CHOKE
WASHER,8
BOARD,BLOW OVER CHECK
WASHER,S,5
SCREW,5X60
ELEMENT,CLEANER
COVER W,BOLT
BOLT,CLEANER COVER
CARBURETOR,SET
CARBURETOR
Before S/N U217738
S/N U217739 and after
CLUTCH,ASS'Y
Page 4
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PARTS INFORMATION
THT-2520
CARBURETOR, FUEL TANK, FUEL SYSTEM • FIGURE 2
ITEM PART NUMBER
DESCRIPTION
PIPE,FUEL,ASS'Y
QTY
1
COMMENTS
2-50
2-51
2-52
2-53
2-53
2-53
2-54
2-54
2-55
2-58
2-61
2-62
2-65
2-66
2-70
2-77
2-78
2-79
2230650090
68000731201
6750404280
5910650000
5910661321
5910651A21
5950650A90
5950656B90
65900801200
99463050185
99072045164
99425040128
79006097200
7880650020
44225143800
70002504080
7000250406
53432710200
CLIP 6.3
FILTER,FUEL
TANK,FUEL PIPE,ASS'Y
TANK,FUEL
TANK,FUEL
TANK CAP
CAP,FUEL BLACK,NON VENT
COLLAR
BOLT,HEX 5X18PS
SCREW,TAPPING,4.5X16
BOLT,PS,4X12
SPRING,STARTER PAWL
PAWL,STARTER
PUMP,PRIMING ASS'Y
PIPE,FUEL,2.5X4X80
PIPE,FUEL,2.5X4X65
GROMMET,FUEL PIPE
VENT,AIR ASS'Y
PIPE,AIR VENT
1
1
1
1
1
1
1
2
2
1
2
1
1
1
1
1
1
1
1
1
Before S/N T218760
From S/N T218761 to U217738
S/N U217739 and after
Before S/N T218760
S/N T218761 and after
S/N U217739 and after
S/N U217739 and after
S/N U217739 and after
S/N U217739 and after
2-121 5640661190
2-122 5650441020
2-123 6460098190
AIR VENT VALVE ASSY
Page 5
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PARTS INFORMATION
THT-2520
CARBURETOR • FIGURE 3
ITEM PART NUMBER
DESCRIPTION
CARBURETOR,SET
CARBURETOR
SCREW,THROTTLE SET
SWIVEL
RING,STOP
VALVE,THROTTLE
O-RING
JET,MAIN,#35
QTY
1
COMMENTS
Before S/N U217738
S/N U217739 and after
3-0
3-0
3-1
3-5
3-7
3-8
3-10
3-11
3-11
3-13
3-14
3-17
3-18
3-18
3-19
3-19
3-20
3-21
3-22
4550650090
4550651A90
54825140200
53925120200
48925100200
48825145800
55025100200
5992000W35
5992000W410
~~
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
* Contained in Carb Repair Kit
P/N 650-25124-900 (Not available individually)
Before S/N U217738
S/N U217739 and after
JET,MAIN,#41
*GASKET,PUMP
*DIAPHRAGM,PUMP
*SCREEN,INLET
BODY,PUMP
BODY,PUMP ASS'Y
*GASKET,DIAPHRAGM
*GASKET,DIAPHRAGM
*DIAPHRAGM,METERING
COVER,DIAPHRAGM
SCREW,SET
~~
~~
5752518280
5752514780
~~
Before S/N U217738
S/N U217739 and after
Before S/N U217738
S/N U217739 and after
~~
~~
47625004200
54825101200
Page 6
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PARTS INFORMATION
THT-2520
GEAR CASE, HANDLE, CUTTER BLADES • FIGURE 4
Page 7
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PARTS INFORMATION THT-2520
GEAR CASE, HANDLE, CUTTER BLADES • FIGURE 4
ITEM
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
PART NUMBER
3003316081
99350015002
99961600200
99961600202
2883318080
30533160200
07533160200
1013319020
3073318020
30333160200
6303316020
1223319021
1223319120
1363319020
99052060165
1203319021
08533160200
12933202201
1243320221
1243228720
1233317A20
40927
99461040155
99461040124
30032250801
99051060143
05033160200
17033160800
2581165020
99011030101
23033160200
23133160200
23233160200
05133160200
7653212020
99072045164
05833160200
99200060011
99101060011
99021060501
26632750200
27632710201
36832057200
99414050301
2943316021
88506500800
92533160200
DESCRIPTION
CASE,GEAR
QTY
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
2
2
6
6
6
6
6
2
6
1
2
1
1
1
1
1
1
1
1
1
6
1
2
1
1
2
2
2
2
1
1
1
COMMENTS
RING,STOP,C-15 EX
BEARING,BALL,#6002
BEARING,BALL,#6002Z
DRUM,CLUTCH
SHAFT,GEAR
PLATE,GUIDE
ROD,CAM
GEAR,2
GASKET,GEARCASE
COVER,GEAR CASE
GUIDE,CUTTER
GUIDE,CUTTER
PLATE,PROTECTION
BOLT,HEX,6X16
BLADE,CUTTER
SEAL,GREASE A
WASHER,7
BOLT,CUTTER FIXING,A
BOLT,FIXING,A
NUT,CUTTER FIXING
NUT,FLANGE,M6
BOLT, HEX, 4X15
BOLT,HEX 4X12
FITTING,GREASE
BOLT,HEX,6X14
HANDLE,A
4-9
4-10
4-11
4-12
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-18
4-19
4-19
4-20
4-21
4-22
4-23
4-25
4-26
4-27
4-28
4-29
4-30
4-31
4-33
4-35
4-36
4-37
4-38
4-39
4-40
4-41
4-42
4-43
4-45
4-46
4-47
4-48
~A302050
A302051~
~A302050
A302051~
A302050
A302051~
SWITCH,STOP
BUTTON,STOP
SCREW,3X10
LEVER,THROTTLE
LEVER,SAFETY
SPRING,THROTTLE LEVER
HANDLE,B
CAP
SCREW,TAPPING,4.5X16
BRACKET,HANDLE
WASHER,SMALL,6
NUT,6
BOLT,6X50
DAMPER,B
COLLAR,DAMPER B
WASHER,BRAKE SHAFT
SCREW,5X30/S
COLLAR 16
WIRE,THROTTLE
DECAL,STOP BUTTON
Page 8
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PARTS INFORMATION
THT-2520
GEAR CASE, HANDLE, CUTTER BLADES • FIGURE 4
ITEM PART NUMBER
DESCRIPTION
BODY,CLAMP A
QTY
1
COMMENTS
4-50
4-51
4-52
4-53
4-55
4-56
4-57
4-58
4-59
4-60
4-60
4-61
4-62
4-63
4-65
4-67
4-69
4-69
4-71
4-72
4-73
4-75
4-76
4-81
4-82
4-83
4-84
2493316020
27632710201
26632750200
36832057200
99414050301
99073045124
2503316020
99073045124
2963319020
3013316020
3013319120
2103316021
0403316080
99201050011
99414050401
19805015800
1383319020
1383319320
99210060012
99440060011
16407007000
81320000200
03629331501
99201060011
1353319120
99461040104
4623319120
COLLAR,DAMPER B
DAMPER,B
2
2
2
2
4
1
1
1
1
2
1
1
2
2
1
1
1
2
2
1
1
1
3
1
2
1
WASHER,BRAKE SHAFT
SCREW,5X30/S
SCREW,TAPPING,4.5X12
BODY,CLAMP,B
SCREW,TAPPING,4.5X12
SPACER
CASE,GEAR,B
CASE,GEAR,B
HANDLE
SUPPORT,HANDLE
WASHER,5
SCREW,5X40/S
CLAMP,CORD
COVER,CUTTER,30"
COVER,CUTTER,30"
WASHER,S,6
Before S/N V026060
S/N V026461 and after
Before S/N V026060
S/N V026061 and after
NUT,SPRING 6
TUBE,PROTECTION
WRENCH,HEX,4
SPANNER,COMBI
WASHER,6
PROTECTOR,BLADE
BOLT,HEX, 4X10
BRACKET,SUPPORT
S/N V230528 and after
S/N V026061 and after
S/N V026061 and after
Page 9
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PARTS INFORMATION
THT-2520
DECALS • FIGURE 5
ITEM PART NUMBER
DESCRIPTION
DECAL,PRO-FORCE A
NAME PLATE, THT 2520
DECAL,PRO-FORCE
DECAL,SRS
QTY
1
COMMENTS
6-1
95037900200
9060660120
95137900200
91106500200
9203246620
91933160200
6-2
6-5
1
1
1
1
1
6-8
6-17
6-28
DECAL,CAUTION
DECAL
Page 10
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TECHNICAL SERVICE
BULLETIN NUMBER PI 3107
Date:
June, 2000
Model & Serial:
THT-2520
All units after serial number V026461.
Reason:
A guide support bracket that extends from the lower gear case casting to the
blade guide has been added to eliminate breakage of the blade guide. The gear
case has been changed to accommodate the mounting of the bracket.
Part Number Changes:
Old Part #
New Part #
462-33191-20
Description
Support Bracket
Remarks
#29
994-61040-104 Hex Bolt, 4x10
Washer 6
#30
992-01060-011
From 3 to 2 pieces
th
Nikko Tanaka Engineering U.S.A. ,Ltd.• 1028 4 Street SW, Bldg B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
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TECHNICAL SERVICE
BULLETIN NUMBER PI 3114
Date:
December 2000
Model & Serial:
THT-2520
All units after serial number V230528
Reason:
A protective guide tip has been added to allow the tip of the blades to move
more easily through foliage and to protect the blades and guide bar from
incidental contact.
A different scabbard that accommodates the wider tip has also been added.
Part Number Changes:
Old Part #
New Part #
135-33191-20
138-33190-20
Description
Tip Protector
Blade Scabbard
Remarks
#82
138-33193-20
th
Nikko Tanaka Engineering U.S.A. ,Ltd.• 1028 4 Street SW, Bldg B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
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TECHNICAL SERVICE
BULLETIN NUMBER PI 3118
Date:
June 2001
Model & Serial:
THT-2100/THT-2120/THT-2510/THT-2520/THT-2540/HTD-2522PF/HTD-2526PF/HTD-
2530PF/HTS-2530PF.
All units produced after serial number W100101.
Reason:
When these units are fitted with the aluminum safety shield, some experience
loosening of the blade jam nuts. A flat washer has been added between the nut
and the aluminum shield to help prevent the nut from becoming loose.
Models THT-2100, 2120, 2510 and HTD-2526PF, 2522PF require 3 washers.
Models THT-2520, 2540 and HTS-2530PF and HTD-2530PF require 2 washers
Part Number Changes:
Old Part #
992-01060-011
New Part #
Description
Washer
Remarks
th
Nikko Tanaka Engineering U.S.A. ,Ltd.• 1028 4 Street SW, Bldg B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
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TECHNICAL SERVICE
BULLETIN NUMBER PI 3119
Date:
January, 2002
Model & Serial:
All THT, HTD, HTS, TPH hedgetrimmer models.
All units after serial number Y004401
Reason:
All future production of hedgetrimmer models will utilize a blade-retaining nut
that is of the locking variety. These nuts are oblong on one side to prevent
loosening during use, but can be removed and re-installed without losing their
locking ability.
When adjusting blade-fastening hardware, thread the bolt (18) through the
blades and guide bar from the bottom, to a point where the flat washer (17), is
still able to rotate, (usually to seat, and then backed off between ¼ and ½
revolution). Then install the lock nuts on the topside, tightening them while
holding the bolt in place. Tighten all nuts, and then re-check for adjustment prior
to operation. A lubricating agent, such as WD-40 should also be used to prevent
sap build-up and premature wear.
Part Number Changes:
Old Part #
123-33202-200
New Part #
Description
Remarks
Reference #19
123-3317A-20 Lock Nut
th
Nikko Tanaka Engineering U.S.A. ,Ltd.• 1028 4 Street SW, Bldg B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
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TECHNICAL SERVICE
BULLETIN NUMBER PI 3130
Date:
December 2004
TPH-210/2501/250PF270PF – A290201 and later.
Model & Serial:
HTD-2522PF/2526PF/2530PF, HTS-2530PF/2540PF – A302051 and later.
THT-2120/2520/2540 – A302051 and later.
Reason:
Configuration standardization of hardware, converting blade hardware from US
Standard thread to Metric thread.
Comments:
Please verify serial number on unit prior to ordering replacement blade hardware and
add the support plate on older serial numbers.
Part Number Changes:
Description
Old parts #
For TPH-210/2501/250PF/270PF
122-32287-21
New parts #
Comments
Cutter guide 625.5L M6
Cutter fixing bolt A
Cutter fixing bolt B
Flange nut M6
122-32286-21
124-32287-20
125-32287-20
991-82060-001
124-33202-21
4 to 1 pc
3 pcs
123-3317A-20
For HTD-2522PF
122-33160-21
4 pcs
Cutter guide 625.5L M6
Cutter fixing bolt A
Flange nut M6
122-33178-20
124-32287-20
991-82060-001
124-33202-21
123-3317A-20
Protection plate 390L
Washer 6
136-33160-20
992-01060-011
For THT-2120/HTD-2526PF
122-33168-21
3 pcs
3 pcs
Cutter guide 734L M6
Cutter fixing bolt A
Flange nut M6
122-33248-20
124-32287-20
991-82060-001
124-33202-21
123-3317A-20
Protection plate 390L
Washer 6
136-33160-20
992-01060-011
For HTS-2530PF
122-33187-20
Cutter guide 830L M6
Cutter fixing bolt A
Flange nut M6
122-33285-20
124-32287-20
991-82060-001
124-33202-21
123-3317A-20
Protection plate 585L
Washer 6
136-33181-20
992-01060-011
For THT-2520/HTD-2530PF
122-33190-21
3 to 1 pc
Cutter guide 845.5L M6
Cutter fixing bolt A
Flange nut M6
122-33191-20
124-32287-20
991-82060-001
124-33202-21
123-3317A-20
protection plate 380L
Washer 6
136-33190-20
992-01060-011
For THT-2540/HTS-2540PF
122-33185-20
2 pcs
Cutter guide 1105L M6
Cutter fixing bolt A
Flange nut M6
124-33202-21
124-32287-20
991-82060-001
123-3317A-20
Protection plate 585L
Washer 6
136-33181-20
992-01060-011
3 to 1 pc
th
Nikko Tanaka Engineering U.S.A. ,Ltd.• 1028 4 Street SW, Bldg B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
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