Invacare ProSPIN X4 - Adjusting Fork Tension

SECTION 12—CASTERS, FORK AND FORK STEM ASSEMBLIES
Part No 1125104 81 ProSPIN™ X4™
Adjusting Fork Tension
NOTE:Forthisprocedure,refertoFIGURE12.3.
1. Toproperlytightenforksandguardagainstflutter,performthefollowingcheckon
bothforks:
A. Tipbackthewheelchairtofloor.
B. Pivotbothforksandcasterstotopoftheirarcsimultaneously.
C. Letcastersdroptobottomofarc(wheelsshouldswingoncetoone‐side,then
immediatelyrestinastraightdownwardposition).
2. Ifnecessary,performoneofthefollowingtoadjusttheforktension:
• StandardForks‐Adjustlocknutaccordingtofreedomofcasterswing
(Detail“A”).
•SuspensionFork(Detail“B”)‐
a. RefertoRemovingtheElastomeronpage 86toremovetheelastomerand
suspensionforkbottomtoaccessthelocknut.
b. Adjustlocknutaccordingtofreedomofcasterswing.
c. RefertoInstallingtheElastomeronpage 86tosecurethesuspensionforktop
totheelastomerandsuspensionforkbottom.
3. Testwheelchairformaneuverability.
4. Ifnecessary,repeatSTEPS1‐2toadjustlocknutsuntiltensioniscorrectforbothforks.
FIGURE 12.3 Adjusting Fork Tension
Fork
Locknut
Caster
DETAIL “B”
SUSPENSION FORK
Suspension Fork Top
Washer
Locknut
Suspension
Fork Bottom
Elastomer
Threaded Bushing
Mounting
Screws
Mounting
Screws
DETAIL “A”
STANDARD FORK
Caster
NOTE:Washerand
locknutshownexploded
forclarityonly.DO
NOTremove.