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.
Nikko Tanaka Engineering U.S.A. ,Ltd.• 1028 4
th
Street SW, Bldg B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
TECHNICAL SERVICE BULLETIN NUMBER PI 3119
January, 2002
Date:
Model & Serial:
All units after
Reason:
All future production of hedgetrimmer models will utilize a blade-retaining nut
When adjusting blade-fastening hardware, thread the bolt (18) through the
Part Number Changes:
Old Part # New Part # Description Remarks
123-33202-200 123-3317A-20 Lock Nut Reference #19
All THT, HTD, HTS, TPH hedgetrimmer models.
serial number Y004401
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.
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.
Nikko Tanaka Engineering U.S.A. ,Ltd.• 1028 4
th
Street SW, Bldg B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
TECHNICAL SERVICE BULLETIN NUMBER PI 3121
September 2002
Date:
Model & Serial:
All units after
Reason:
Exhaust gas flow from these models in some circumstances can cause
The direction of flow from the muffler has been re-directed to exit horizontally
New style components should be ordered via the set listed below when these
Part Number Changes:
Old Part # New Part # Description Remarks
721-04400-20 721-03003-20 Tail Pipe
738-03002-20 738-03003-21 Muffler Protector 721-03003-00 Muffler Protector Set Includes Re-Directed Tail Pipe
HTD-2522PF / 2526PF / 2530PF / HTS-2530PF
serial number Y210151
scorching of leaves during cutting due to the direction of the tail pipe outlet.
rather than vertically.
parts are replaced.
is marketed exclusively by:
th
ISM, Inc. • 1028 – 4
Street, Suite B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
www.tanaka-usa.com * custsvc@tanaka-ism.com
TECHNICAL SERVICE BULLETIN NUMBER PI 3130
Date: December 2004
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
Comments:
Part Number Changes:
Cutter guide 625.5L M6 122-32287-21 122-32286-21
Cutter guide 625.5L M6 122-33160-21 122-33178-20
Protection plate 390L 136-33160-20
Cutter guide 734L M6 122-33168-21 122-33248-20
Protection plate 390L 136-33160-20
Cutter guide 830L M6 122-33187-20 122-33285-20
Protection plate 585L 136-33181-20
Cutter guide 845.5L M6 122-33190-22 122-33191-20
protection plate 380L 136-33190-20
Cutter guide 1105L M6 122-33185-20 122-33186-20
Protection plate 585L 136-33181-20
TPH-210/2501/250PF270PF – A290201 and later.
Standard thread to Metric thread.
Please verify serial number on unit prior to ordering replacement blade hardware and
add the support plate on older serial numbers.
Description Old parts # New parts #
Cutter fixing bolt A 124-33202-21 124-32287-20 4 to 1 pc
Cutter fixing bolt B 125-32287-20 3 pcs
Flange nut M6 123-3317A-20 991-82060-001 4 pcs
For HTD-2522PF
Cutter fixing bolt A 124-33202-21 124-32287-20
Flange nut M6 123-3317A-20 991-82060-001
Washer 6 992-01060-011 3 pcs
Cutter fixing bolt A 124-33202-21 124-32287-20
Flange nut M6 123-3317A-20 991-82060-001
Washer 6 992-01060-011 3 pcs
Cutter fixing bolt A 124-33202-21 124-32287-20
Flange nut M6 123-3317A-20 991-82060-001
Washer 6 992-01060-011 3 to 1 pc
Cutter fixing bolt A 124-33202-21 124-32287-20
Flange nut M6 123-3317A-20 991-82060-001
Washer 6 992-01060-011 2 pcs
Cutter fixing bolt A 124-33202-21 124-32287-20
Flange nut M6 123-3317A-20 991-82060-001
Washer 6 992-01060-011 3 to 1 pc
ISM, Inc. • 1028 – 4th Street, Suite B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
For TPH-210/2501/250PF/270PF
For THT-2120/HTD-2526PF
For HTS-2530PF
For THT-2520/HTD-2530PF
For THT-2540/HTS-2540PF
www.tanaka-usa.com * custsvc@tanaka-ism.com
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