Invacare ProSPIN X4 - Checking Adjusting Fork Stem Angle

SECTION 12—CASTERS, FORK AND FORK STEM ASSEMBLIES
Part No 1125104 85 ProSPIN™ X4™
Checking/Adjusting Fork Stem Angle
NOTE:Forthisprocedure,refertoFIGURE12.6.
NOTE:Whenevertheseatheightisraisedorloweredbychangingthecastersize,forkstemlength,
rearwheelsizeoraxlemountingplateadjustments,thecasterangleneedstobecheckedto
maintaina90°anglebetweenthecasterforkstemandtheground/floor.Casterforkstemsthatare
perpendiculartothefloorwillrollbetter,trackstraighterandminimizeanyʺ3‐wheelingʺofthe
wheelchair
NOTE:Check/adjusttheforkstemangleinthesamewayforbothstandardandsuspensionstyle
forks.
Checking Fork Stem Angle
1. Placethewheelchaironaflatsurface.
2. PositionalargerighttriangleorʺLʺsquareontheflatsurfaceandagainstthefork.The
forkmustbealignedtothe“L”square(90°toflatsurface)(FIGURE12.6).
3. Performoneofthefollowing:
•Forkisat90°:Checkremainingforkstemfor
correctalignment.
•Forkisnot90°:Adjustforkstemangle.RefertoAdjustingForkStemAngleon
page 85.
Adjusting Fork Stem Angle
1. Loosen,butDONOTremove,theangleadjustmentscrewandlocknutthatsecurethe
forkstemtothewheelchairframe.
2. PositionalargerighttriangleorʺLʺ
squareontheflatsurfaceandagainst
flatonthefork.
3. Tighten/loosentheangleadjustment
screwuntiltheindexingmarkis
alignedwiththe“L”
square(90°toflat
surface)(FIGURE12.6).
NOTE:Oncetheforkstemisinthe90°
position,DONOTallowtheangleadjustment
screwtoturnwhiletighteningthelocknut.
Doingsowillmovetheforkstemoutof
alignment.
4. Reinstallthelocknutontotheangle
adjustmentscrewandsecurelytighten.
5. Checkremainingforkstemforcorrect
alignment.RefertoChecking/
AdjustingForkStemAngleonpage 85.
FIGURE 12.6 Checking/Adjusting Fork
Stem Angle
“L” Square
Locknut
Angle Adjustment Screw
Fork Stem
Flat Surface
NOTE:Locknutandangleadjustmentscrew
shownremovedforclarityONLY,
Fork (Flat)
NOTE:Standardforkshown.