− 110 −
IfsteeringunitresponseislessthanidealandadjustingthesettingsontheVolumeSettings
screeninTestmodehasnoeffect,theproblemismostlikelyduetoanincorrectlyengagedgear,
animproperlyplacedmicroswitch,orabrokenvariableresistorormicroswitch.
Followthestepslistedbelowtocorrectthegearengagement,adjustthepositionoftheswitch,
orreplacethevariableresistororswitch.
RefertoSection12,"MaintainingtheBaseInterior",forinstructionsonhowto:adjustand
replacethedirectioncontrolvariableresistor.
11 − 1 ADJUSTINGANDREPLACINGTHEY-AXISVR
Thevariableresistorthatdetectstheforwardandbackwardtiltingoperationofthesteeringunit
iscalledtheY-axissteeringVR.Followthestepslistedbelowtoadjustthegearengagementor
replacetheVR.
Inthismachine,theVRwillnotbedamagedaslongasitsaxleisrotatingwithinitsrangeof
motionwhenthehandlesonthemachinearetiltedtotheirmaximumextent.SecuretheVRso
thatitsaxlepointsintheindicateddirectionandthegearisproperlyengagedwhenthehandles
arenotbeingtilted.
Thefollowingtoolsandinstrumentsarerequiredtoperformtheseoperations:
- 3mmdiameterhexagonalscrewdriverorwrench
- M4-sizePhillipsscrewdriver
- 1.5mmdiameterhexagonalscrewdriverorwrench
- 10mmdiameterspanner
- Solderingiron
ADJUSTMENTPROCEDURE
① Turnoffthepower.
② Removethe4hexagonalsocketscrews
aroundtheboostbutton.
PHOTO11.1a
③Removethe4trussscrewsholdingthetop
andbottomofthefrontsteeringcoverin
place.
STEERINGCOVERFRONT
TRUSSSCREW(4),black
M4×6
PHOTO11.1b
HEXAGONALSOCKETSCREW(4),black
M4×10,chrome