Cobra MT250C, MT270K, LRH270K Operator's Manual
CONTENTS
ENGINE PART.....................1-16
BRUSH CUTTER................17-27
POLE PRUNER..................28-39
HEDGE TRIMMER..............40-49
Attention Statements
Throu ghout t his man ual are s pecial
atten tion st ateme nts.
DANGER!
DANGER!
A statem ent pre ceded b y the trian gular
atten tion sy mbol an d the wor d
"WA RNING "indi cates a p otent ially
hazar dous si tuati on whic h, if not
avoid ed, COU LD resu lt in dea th or
serio us inju ry!
CAUTION!
A statem ent pre ceded b y the word
"CAUT ION" co ntain s infor mation
that sh ould be a cted up on to avo id
damag e to the ma chine .
IMPORTANT!
NOTE:
A statem ent pre ceded b y the word
"IMPO RTAN T" is one t hat pos sesse s
speci al sign ifica nce.
A statem ent pre ceded b y the word
"ONTE " conta ins inf ormat ion that is
handy t o know an d may mak e your jo b
easie r.
A statem ent pre ceded b y the triangular
atten tion sy mbol an d the wor d
"DANG ER"in dicat es an imm inently
hazar dous si tuati on whic h, if not
avoid ed, wil l resul t in deat h or
serio us inju ry!
1
DANGER!
Appro achin g or cont actin g electri cal
lines w ith the t rimme r could c ause
death o r serio us inju ry. Keep t he
trimm er at lea st 10me ters aw ay from
elect rical l ines or b ranch es that
conta ct elec trica l lines .
Introduction
Long re ach hed ge trim mer 260 0 is
desig ned and b uilt to d elive r superio r
perfo rmanc e and rel iabil ity witho ut
compr omise t o quali ty, comf ort, sa fety or
durab ility.
IMPORTANT!
The information contained in these
instrucitions describes components
available at the time of publication.
While every attempt has been made to
provide the latest information about your
product, there may be some differences
between your attachment and
what is described here. We reserves
the right to make changes to products without
prior notice and without obligation to make
alterations to components
previously manufactured.
The procedures described in this manual
are intenaded to help you get the most
from your machine as well as to protect
you and others from harm.
these procedures are guidelines for safe
operation under most conditions, and are
not intended to replace any safety rules
and/or laws that may be in force in your
area.
If you have questions regarding your
power tool, or if you do not understand
someting in this manual, your local
dealer will be glad to assist you.
Safety Precautions
NOTE!
THE ARTICUL ATED HEDGE
TRIMMER IS NOT INSULATED
AGAINST ELECTRICA L SHOCK1
An arti culat ed hedg e trimm er has the po tenti al
to do ser ious da mage if m isuse d, abused o r
misha ndled . To reduce t he risk o f injur y, you
must ma intai n contr ol at all t imes, and o bserv e
all saf ety pre cauti ons dur ing opera tion.
Never p ermit a p erson w ithou t trainin g or
instr uctio n to oper ate thi s machine !
For spe cific m ainte nance a nd safety
infor matio n about y ou long reach Hedg e
trimm er T260 0 Multi purpo se Engi ne or
long re ach pru ner P26 00 power head,
consu lt the ow ner's m anual p rovided
with it . If it has b een los t or misp lace,
conta ct us for a r eplac ement .
2
Operating Precautions
Never o perat e this to ol or any
other p ower eq uipme nt if you a re
tired , ill, or u nder th e influ ence of
alcoh ol, dru gs, or an y subst ance
that co uld aff ect you r abili ty or
judge ment.
Keep by stand ers at le ast 15 me ters
(50 fee t) away f rom the o perat ing
trimm er to red uce the r isk of be ing
struc k by fall ing obj ects or thrown
debri s.
Never c ut off br anche s over yo ur
head. T he cut- off b ranch es may
hit you a nd caus e serio us inju ry.
read an d follo w this ma nual,
make su re anyo ne usin g the
trimm er dose l ikewi se. Fai lure
to do so co uld res ult in se rious
perso nal inj ury or ma chine
failu re. Kee p this ma nual fo r
futur e refer ence.
Alway s wear a ha rd hat to r educe
the ris k of head i njuri es during
opera tion of t his mac hine. In
addit ion, al ways we ar eye an d
heari ng prot ectio n. We
recom mends w earin g a face
shiel d as addi tiona l face an d eye
prote ction .
Wear no n-sli p heavy -duty g loves
to impr ove you r grip on t he
trimm er hand le. Wea r sturd y
footw ear wit h nonsh ip sole s to
proiv ide goo d footi ng. Ste el-toes
safet y boots a re reco mmend ed.
Were sn ug-fi tting c lothe s that al so
permi ts free dom of mo vemen t.
3
Operating Precautions
Never p ermit a p erson w ithou t trainin g
or inst ructi on to ope rate this machin e.
WARNING!
Alway s make su re the cu tter
attac hment i s prope rly installed an d
firml y tight ened be fore operation .
Never u se a crac ked or wa rped cu tter
or cutt er bar: r eplac e or repa ir before
use.
Befor e start ing the e ngine , make sure
the cut ter is cl ear of al l objects.
Alway s stop th e engin e immed i-ately
and che ck for da mage if y ou strike a
forei gn obje ct or if th e machi ne
becom es tang led. do n ot operate with
broke n or dama -ged eq uipme nt.
When cu tting a b ranch t hat is un der
tensi on, be al ert for s pring -back so th at
you wil l not be st ruck by t he movi ng
branc h.
Stop th e machi ne imme diate ly if it
sudde nly beg ins to vi brate o r shake.
Inspe ct for br oken, m issing or
impro perly i nstal led par ts or
attac hment s.
Never s moke or l ight fi res nea r the
hedge t rimme r. Keep th e trimmer a way
from ex cessi ve heat . Engin e fuel is
very fl ammab le and fi re could lead to
serio us pers onal in jury or p roperty
damag e.-
Never o perat e this ma chine o r other
power e quime nt if you a re tire d, ill, or
under t he infl uence o f alcohol, drugs ,
or any ot her sub stanc e that co uld
affec t your ab ility o f judge ment.
Do not op erate t he arti culated hedge
trimm er with t he muff ler rem oved.
Make su re ther e is alwa ys good
venti latio n when op erati ng the
artic ulate d hedge t rimme r. Fumes fro m
engin e exhau st can ca use ser ious
injur y or deat h. Neve r run the e ngine
indoo rs!
Make su re ther e are no mi ssing o r
loose f asten ers, an d that th e stop
switc h and thr ottle c ontro ls are work ing
prope rly
If a cutt er shou ld bind f ast in a cu t,
shut of f the eng ine imm ediat ely. Push
the bra nch or tr ee to eas e the bin d and
free th e cutte r.
Make su re the cu tters a re corr ectly
adjus ted bef ore ope rating the
artic ulate d hedge t rimme r (see page
17 for cu tter ad justm ent pro cedures ).
Never a ttemp t cutte r adjus tment wit h
the eng ine run ning!
Make su re of no fu el leak ing fro m Fuel
tank, f uel cap , Fuel pi pe and
carbu retor a nd othe r parts which fuel
may lea k. Repa ir the ma chine if fuel
leaki ng, mak e sure no l eakin g again.
4
Installing the Powerhead
CAUTION!
1.Pla ce the po werhe ad on a cle an, flat
surfa ce, spa rk plug f acing up.
2.Use t he 4mm al len wre nch to lo osen
the tub e clamp a s shown i n figure 4.
3.Sli p off the p rotec tive co vers fr om
two end s of bube .
Do not fo rce the l ower tu be info
the pow erhea d! Exce ssive f orce
can dam age the c ompon ents.
4.Pus h the low er tube t oward s the tube
clamp a nd rota te it by ha nd to che ck
that th e mains haft sp lines e ngage the
power head, S ee Figu re 5
5.Ins ert the l ower tu be into t he tube
clamp u ntil it b ottom s and ali gn the
posit ionin g holes o n the tub e and
clamp , then in stall t he scre w.
6.Fas ten the c lamp se curel y with 2
clamp s crews .
5
Connecting the Throttle Cable
1.Rem ove the a ir clea ner cov er.
2.Con nect th e end of th e throt tle cable t o
the joi nt on the t op of the c arbur etor.
See Fig ure 6, fi gure 7.
Conne cting s witch w ires
conne ct the sw itch wi res bet ween the
engin e
and the m ain uni t. Pair t he wire s
of the sa me colo r. See fig ure 8.
6
Adjusting the Throttle cable
1.Loo sen the t hrott le cabl e nut at fan
cover a s shown i n figur e 9.
figure
9
figure
10
figure
11
2.Adj ust the t hrott le cabl e adjuste r
nuts un til you a chiev e a free play on
the thr ottle t rigge r of abou t 6mm.
See Fig ure 10.
When 6m m free pl ay is ach ieved ,
tight en the tw o 10mm th rottle cable
nuts. W hen the t hrott le cable is
corre ctly ad juste d, and th e throttl e
trigg er is ful ly depr essed ( full
throt tle), t he thro ttle wi ll contac t the
stop on t he thro ttle bo dy. See Fi gure
11.
A dab of Nev er-Se ez TM or eq uival ent
eases r emova l.
4.Rep lace th e air cle aner co ver.
7
Assembling the Tube Sections
1.Pla ce the po werhe ad/lower tube
assem bly and t he uppe r tube
assem bly on a cl ean, fl at surf aceso
that bo th asse mblis e fit end t o end.
The pow erhea d/low er tube a ssembly
shoul d be faci ng up, an d the upp er
tube as sembl y shoul d be posi tioned
with th e latch P rotec tor fac ing up.
Figure
12
Keep th e open en d of the tu bes
clean a nd free o f impur ities !
CAUTION!
Figure
13
Figure
14
2.Loo sen the c ouple rscre w.
3.Dep ress th e latch a nd insert the
power head/ lower t ube ass embly int o
the cou pler un til it bo ttoms . Release
the lat ch. Roc k the upp er tube
assem bly bac k and for th unti l you
are sur e it snap s in plac e by the
coupl er lock . See Fig ure 12.
4.Whe n the two t ube hal ves are l ocked
toget her, sli de the la tch prote ctor
into gr oove of l atch, t hen tig hten the
coupl er scre w. See Fig ure 13.
Disas sembl ing The P ole sec tions
1.Wit h the pol e prune r on a clea n, flat
surfa ce, loo sen the c ouple r screw.
slide t he latc h prote ctor ou t of groove
of latc h.
2.Dep ress th e latch . This re lease t he
coupl er lock . See Fig ure 14.
3.Pul l the upp er tube a ssemb ly out of
the cou pler
8
WARNING!
This en gine is t o be oper ated on a 25:1
mixtu re cons istin g of unleaded
gasol ine and 2 -cycl e mixin g oil only.
Some ga solin es cont ain alc ohol as an
oxyge natel O xygen ated fu els may
cause i ncrea sed ope ratin g
tempe ratur es. Und er cert ain condi tions
alcoh ol-ba sed fue ls may al so reduce
the lub ricat ing qua lities of some mix ing
oils. N ever us e any fue l conta ining
more th an 10% al cohol b y volume!
When an o xygen ated fu el must be
used, f uel con taini ng an oxy genate
such as M TBE is to p refer red ove r an
alcoh ol base d fuel.
Gener ic oils a nd some o utboa rd motor
oils ma y not be in tende d for use i n
high- perfo rmanc e air coo led 2-cyc le
engin es, and s hould n ever be used in a
this en gine!
Mixing Fuel
CAUTION!
Alway s minim ize the r isk of fi re when
handl ing fue l!
Alway s allow t he prun er to cool
befor e refue ling!
Wipe al l spill ed fuel a nd move t he
prune r at leas e 3 meter s (10 feet)
from th e fueli ng poin t befor e
resta rting !
Never s moke or l ight an y fires near
the pru ner or fu els!
Never p lace an y flamm able ma terial
near th e engin e muffl er!
Never o perat e the eng ine wit hout
the muf fler an d spark a rrest or in
place a nd prop erly fu nctio ning!
Never o perat e this ma chine if fuel
syste m compo nents a re dama ged
or are le aking .
Use onl y fresh , clean u nlead ed galoli ne
with an o ctane r ating o f 87 or abo ve.
Mix all f uel wit h 2-cyc le Engi ne Oil at a
gasol ine/o il rati o of 25:1 .
Mix onl y enoug h fuel fo r your im mediate
needs ! If fuel m ust be st ored lo nger than
30day s, it sho uld fir st be tre ated with a
TM
stabi lizer s uch as St aBil
1.Pla ce the pr uner on a f lat, le vel surfa ce.
2.Cle ar any di rt or oth er debr is from
aroun d the fue l fille r cap.
3.Rem ove the f uel cap , and fil l the fuel
tank wi th clea n, fres h fuel mi xture.
4.Ins tall an d firml y tight en the fuel c ap.
5.Wip e up any sp illed f uel from the
power head be fore re start ing.
IMPORTANT
9
Starting A Cold Engine-Restarting After Refueling
Contr ol Posi tions ( cold en gine)
1.Set t he thro ttle tr igger to "Fast idl e"
as foll ows (Fi gure 24 ):
figure 26
figure 27
figure 25
Engin e ignit ion is co ntrolled by a
twopo sitio n START-STOP swit ch moun ted
on the th rottl e body, ty pical ly labe led "I"
for START and "O" fo r STOP.
IMPORTANT
●Depre ss and ho ld the th rottl e
locko ut leve r.
●squee ze and ho ld the th rottl e
trigg er.
●Depre ss the th rottl e lock bu tton.
●While h oldin g down th e throt tle
lock bu tton, r eleas e the thr ottle
trigg er and th rottl e locko ut lever.
●Relea se the th rottl e lock bu tton.
2.Sli de the
ignit ion
switc h to the
"I" (st art)
Posit ion. Se e
Figur e 25.
3.Pri me the en gine by d epressing the
carbu retor p rimer b ulb fou r or five
times , See Fig ure 26. You s hould be
able to s ee fuel i nside t he bulb .
4.Cho ke the en gine by m oving t he
choke l ever up t o the "cl osed"
posit ion. Se e Figur e 27.
Contr ol Posi tions ( warm en gine)
1.Set t he thro ttle tr igger t o "fast idl e"
(see St ep 1 abov e).
2.Sli de the ig nitio n switc h to the "I"
(START) posit ion.
3.Mov ing the c hoke le ver dow n to the
"open " posit ion.
figure 24
10
Figure 28
Figure 29
Cranking The Engine
When st artin g the eng ine, ma ke sure
the cut ting at tachm ent is we ll clear
of byst ander s, pets o r objec ts. The
attac hment m ay rota te duri ng startu p.
WARNING!
CAUTION!
CAUTION!
Never o perat e the pol e prune r unless
a cutti ng atta chmen ts is ins talled.
The rec oil sta rter ca n be dama ged
by abus e.
Alway s engag e the sta rter be fore
attem pting t o crank t he engi ne.
Never p ull the s tarte r cord to i ts
full le ngth.
Alway s rewin d the sta rter co rd
slowl y.
1.Pla ce the un it firm ly on the ground,
makin g sure it i s stabl e and tha t the
cutti ng atta chmen t is free a nd clear
of any by stand ers or ob jects , Hold
onto th e hand gr ip on the o uter tu be
with yo ur left h and gra sp the starter
rope ha ndle wi th your r ight ha nd.
See Fig ure 28.
2.Pul l the sta rter ha ndle sl owly unti l
you fee l the sta rter en gage.
3.Pul l the sta rter ha ndle qu ickly to
start t he engi ne.
When Th e Engin e Start s Or Fire s
Open th e choke b y movin g the cho ke
lever d own. Se e Figur e 29.
11
The cut ting at tachm ent wil l engage
and rot ate as th e engin e start s and
accel erate s.
WARNING!
If the en gine di d not con tinue t o run,
repea t the app ropri ate cra nking
proce dure (w arm or co ld engi ne).
When th e engin e start s clear e xcess
fuel fr om the co mbust ion cha mber ty
revvi ng the en gine se veral t imes with
the thr ottle t rigge r (oper ating the
trigg er will a utoma tically diseng age
the "fa st idle " setti ng).
If The en gine Fa ils To Start
Repea t the app ropri ate cra nking
proce dure (w arm or co ld engi ne). If
the eng ine fai ls to sta rt afte r repeate d
attem pts, th e engin e is like ly floode d.
Proce ed to the f ollow ing pro cedure.
Start ing A Flo oded En gine
1.Dis conne ct the sp ark plu g lead, and
then us e the spa rk plug w rench t o
remov e the spa rk lug (t urn
count erclo ckwis e to remo ve).See
Figur e 30.
If the sp ark plu g is foul ed or soa ked
with fu el, cle an the lu g as nece ssary.
Figure 30
Figure 31
2.Ope n the cho ke (Fig ure 31) a nd fully
depre ss the th rottl e trigg er with you r
left ha nd, the n pull th e start er handle
rapid ly with y our rig ht hand t o clear
exces s fuel fr om the co mbust ion
chamb er.
CAUTION!
The cut ting at tachm ent can c ontinue
rotat ing aft er the en gine is switched
off!
WARNING!
Incor rect sp ark plu g insta llation c an
resul t in seri ous eng ine dam age.
3.Rei nstal l the spa rk plug a nd tighte n it
firml y. If a torq ue wren ch is ava ilabl e,
torqu e the spa rk plug t o 16.7- 18.6
N.m.
4.Rep eat the s tarti ng proc edure for a
warm en gine.
5.If th e engin e still f ails to s tart, ref er
to the tr ouble s shoot ing sec tion near
the end o f the man ual.
Stopping The Engine
1.Coo l the
engin e by
allow ing it to
idle fo r two
or thre e
minut es.
2.Sli de the
ignit ion
switc h to the
"O" or ST OP
posit ion. Se e
Figur e 31.
12
The cut ting at tachm ent mus t never
rotat e at engi ne idle s peed.
WARNING!
Adjusting The Carburetor
The eng ine mus t retur n to idle s peed
whene ver the t hrott le trig ger is rele ased.
Idle sp eed is ad justa ble and m ust be
set low e nough t o permi t the eng ine
clutc h to dise ngage t he chai n saw
when th rottl e trigg er is rel eased.
Check and Adjust Idle Speed
1.Sta rt the en gine an d allow i t to idle
two or th ree min utes, o r until i t
warms u p.
If the cu tting a ttach ment ro tates at
engin e idle, r educe i dle spe ed by
turni ng the id le adju sting s crew
count er cloc kwise a s neces sary. Se e
Figur e 32.
Use a tac homet er, if one i s available,
to set en gine id le. Sta ndard i dle
speed i s:
300±200 rpm
IMPORTANT
Figure 32
NOTE
3.If th e engin e is stal ling an d won't
idle, i ncrea se idle s peed by turning
the idl e adjus tment s crew cl ockwise .
The mix ture of t he carb ureto r on this
unit ca nnot be a djust ed.
Safety Operation
This ma chine i s desig ned esp ecially
for cut ting br anche s.
Never u se this m achin e for any o ther
purpo ses. Ne ver try t o cut sto nes,
metal s, plas tics or a ny othe r hard
objec ts.
Using f or othe r purpo ses tha n cutting
branc hes may d amage t he mach ine or
cause s eriou s injur y.
Preparations
Wear su itabl e prote ctive c lothi ng
and equ ipmen t-see s ectio n "safety
Preca ution s".
Choos e the bes t work po sitio n for
safet y again st the fa lling o bject
(Bran ch etc)
Start t he engi ne.
Put on th e strap .
Never s tand di rectl y under neath the
branc h you are c uttin g-be wa ry of
falli ng bran ches. N ote tha t a branch
may spr ing bac k at you af ter it hi ts the
groun d.
Cutti ng sequ ence:
To allow br anche s a free fa ll, always
cut the l ower br anche s first . Prune
heavy b ranch es (Lar ge diam eter) in
sever al cont rolla ble pie ces.
Worki ng posi tion:
Hold th e contr ol hand le with y our right
hand, a nd the sh aft wit h your le ft hand.
Your l eft arm s hould b e exten ded to
the mos t comfo rtabl e posit ion.
The sha ft shou ld alwa ys be hel d at an
angle o f 60° or les s.
13
WARNING!
General maintenance
Befor e perfo rming a ny main tenance ,
repai r, or clea ning wo rk on the
machi ne, mak e sure th e engin e and
cutti ng atta chmen t are com pletely
stopp ed. Dis conne ct the spark plug
wire be fore pe rform ing service or
maint enanc e work.
WARNING!
WARNING!
Muffler
Non-s tanda rd part s may not operate
prope rly wit h your un it and ma y cause
damag e and lea d to pers onal in jury.
Opera ting th e engin e witho ut a
muffl er or wit h a muffler th at is
damag ed or imp roper ly suff icien tly to
lead to h earin g loss．
This ma chine m ust nev er be ope rated
with a fa ulty or m issin g spark arrestor o r
muffl er is wel l secur ed and in g ood
condi tion, A wor n or dama ged muffler is
a fire ha zard an d may als o cause
heari ng loss .
SPARK PLUG
Keep th e spark p lug and w ire
conne ction s tight a nd clea n.
Daily maintenance
Prior t o each wo rk day, pe rform t he
follo wing:
Remov e all dir t and deb ris from the
engin e, chec k the coo ling fi ns and air
clean er for cl oggin g, and cl ean as
neces sary. se e Figure 33 .
Caref ully re move an y accum ulating o f
dirt or d ebris f rom the muffler an d fu el
tank firs t bu ild－up in these are as c an
lead to engin e ov erhea ting ， fire or
prema ture wear ．
Check f or loos e or miss ing scr ews or
compo nents . Make su re the cu tting
attac hment i s free of d ebris and
secur ely fas tened .
Check t he enti re mach ine for leaking
fuel or g rease .
Make su re nuts , bolts a nd scre ws
(expe ct carb ureto r adjus ting scre ws)
and tig ht.
Figure 33
14
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