Tanaka 746451 User manual

Owner’sManual
PROFESSIONAL CUTTING HEADS
ISM, Inc. • 1028 4th St. SW • Auburn, WA 98001 • Phone: [phone] • Fax: [phone] • www.tanakapowerequipment.com
Safety Instructions
1.) *Warning! Read this owners manual as well as the
owners manual supplied with your grass trimmer. Be sure to
follow all warnings and safety instructions. Failure to do so
can result in serious injury to the operator and/or bystanders.
2.) Wear eye protection that complies with ANSI Z87-1 std.
3.) Do not operate power equipment when you are tired, ill,
or under the influence of alcohol, drugs, or medication.
4.) Alwayswearheavylongpants,boots,andgloves. Donot
wear loose clothing, short pants, sandals, or go bare foot. Secure
hair so it is above shoulder level.
5.) Inspectunit beforeeachuse. Replace partsthatmay be
cracked,chipped,ordamaged in any way. Makesure the cutting
headisproperlyinstalledandsecurelyfastened.Besuretthe
cuttingattachmentshield isproperlyattached in theposition
recommendedbythemanufacturer.
6.) Clear the work area before each use. Remove all objects
such as rocks, broken glass, nails, wire, or string which can be
thrown or become entangled in the cutting head. Clear the area
of children, bystanders, and pets in a 50 foot (15m) radius. It is
recommendedthatbystandersweareyeprotection. Ifyou are
approached,stopthe engine and cuttingattachmentimmediately.
Installation
The following instructions are based on mounting the head to
Tanaka units. Other brands of product may be similar, however
be sure to check the unit’s owner’s manual for proper procedures.
The package comes standard with the following mounting
components:
The head comes standard with a 10mm x 1.25 LHF adapter (Ref.
1-3 in chart above). To change the adapter, loosen /remove (with
a 19mm wrench or socket) by turning counter-clockwise (Ref. 2).
5” SEMI-AUTO PACKAGED CUTTING HEAD
ITEM NUMBER: 746451
-Parts breakdown on back-
1-1 1-2 1-3
1-4 1-5
Ref. 4
Ref. 3
Ref. 5
Ref. 7
Ref. 6
Ref. 8 Ref. 9
3” / 10cm
Ref. 2
(#27976 - Page 1)
Ref.# Part No. Description
1-1 365-3383E-200 Adapter Nut
(8mmx 1.25 LHF)
1-2 356-33830-200 Adapter Bolt
(8mmx 1.25 LHM)
1-3 356-3383B-200 Adapter Nut
(10mmx 1.25 LHF)
1-4 29729 Mounting Washer
1-5 17W20004 Mounting Spacer
Installation (continued)
Many gear cases utilize a separate piece or cover which includes
a mounting shoulder which is used to hold and center cutting
bladesasshowninRef. 3.OnTanakaunits,forthe5”Semi-Auto
head to be held flush and tight, BOTH the mounting spacer (first)
and washer (second) must be used as shown in Ref. 4.
Once the spacers and head have been attached, rotate the
cover to the front of the gear case until you can insert a long /
small diameter metal object (such as a small screwdriver or hex
wrench included with all Tanaka units) into the locking hole as
shown in Ref. 5. Tighten the cutting head by turning it counter-
clockwise.
Extending Line
When nylon line becomes shorter, reduce engine speed
and tap the cutting head on the ground as shown in Ref. 6.
To extend nylon line by hand, push in on the bottom of the head
(after engine has been stopped) and rotate as shown in Ref. 7.
Disassembly / Nylon Line Installation
Press in on the two locking slots of the inner housing as shown in
Ref. 8. Pull inner housing from the outer housing and
remove spring and spool from the outer housing. Fold the
line in half (the head will hold up to 25’ of .095” dia. line.) so
that one end is approx. 3 inches longer than the other.
Insert the folded end in to the slot of the center partition of
the spool and wind the nylon line in the direction marked
“Wind Cord”. Leave approx 3 inches of line on each end
and lock in to the appropriate slots on the spool as shown
in Ref. 9

Owner’sManual
PROFESSIONAL CUTTING HEADS
ISM, Inc. • 1028 4th St. SW • Auburn, WA 98001 • Phone: [phone] • Fax: [phone] • www.tanakapowerequipment.com
Ref Part Number Part Description Qty
1 356-33830-200 Adapter, 8mm x 1.25mm LH Male 1
2 356-3383B-200 Adapter, 10mm x 1.25mm LH Female 1
3 786-33830-200 Body, Nylon Cord 1
4 315-33830-200 Nut, Special 1
5 793-33830-200 Spring, Reel 1
6 787-33830-200 Reel, Nylon Cord 1
7 789-33830-200 Cap, Body 1
8 788-33830-200 Eyelet 2
The Original
BRAIN
®
The BRAIN
®
2000
FULLY AUTOMATIC
Aluminum Fixed
Line
Aluminum Manual
Feed Manual Feed
HEAVY-DUTY COMMERCIAL
Cutting Head Assembly
Place the spool into the inner housing. Pass both line
ends through the eyelets and remove the lines from the
locking slots of spool as shown in Ref. 10. Place the
return spring into the spool, then place the outer housing on
theinnerhousingandassemblefirmlybypushingthetwo
locking slots with thumbs as shown in Ref. 11. Adjust nylon
linetodesiredlengthbypushinginonthetapbuttonand
turningthe spool.
Troubleshooting
Problem: Nylon line is not feeding.
Possible Causes:
1.) Nylon line is almost used up.
2.) The lines have been deformed .
3.) The lines have become intertwined.
Solutions:
1.) Disassemble the cutting head.
2.) Remove nylon line from the spool and rewind.
3.) Replace the nylon line if the line is almost gone or deformed.
4.) Reassemble the cutting head.
Ref. 11Ref. 10
TANAKA OFFERS OTHER HIGH QUALITY CUTTING HEADS
Parts List
5” SEMI-AUTOMATIC CUTTING HEAD
ITEM NUMBER: 746451
(#27976 - Page 2)
Order # 746251
Std.LineDiameter: .095”
LineCapacity:30ft./9.1m
Order # 746280
Std.LineDiameter: .130”
LineCapacity: N/A
Order # 746290
Std.LineDiameter: .105”
LineCapacity:15ft/4.5m
Order # 746551
Std.LineDiameter:.095”
LineCapacity:25ft/7.6m
Order # 746751
Std.LineDiameter: .095”
LineCapacity: 20ft./6.7m