Bailey Unicorn - Page 41

29
AL-KOCHASSIS
FIG8.
v. Always rotating the road wheel in the
forwarddirection–neverbackwards,adjust
thestar-wheelwithasuitablescrewdriver,
inthedirectionofthearrowembossedon
the backplate until there is resistance in
thewheelrotation(g.8).
vi.Slacken off the star-wheel adjuster until
theroadwheelturnsfreelyintheforward
direction(g.8).
vii.Check the adjustment at the end of the
brake cable where it is secured to the
abutment(bracket)weldedtothecentreof
theaxle.Whentheinnercableispulledout
itshouldextendbetween5and8mm.(On
tandemaxlesadoubleabutmentisttedto
thefrontaxleonly.)
viii. Repeatforotherwheelorwheels.
FIG9.
ix.Ensure the balance bar (compensation) is
being pulled evenly. This bar (double on
tandemaxles)shouldalwaysbeparalleled
with the axle tube when pulled (gs. 10).
AdjustM8lockandballnuts,ifnecessary,
toachievecorrectparallelposition(Fig.9).
x. Checkthebrakerodsupportbracket(xed
to the oor) is supporting the brake rod
evenly. The brake rod must always run
straight, never bent or curved under any
ttings.Ontandemaxles,usingthedouble
balancebar,abrakerodsupporttube(Part
No.228827)mustalwaysbettedonthe
endofthe brakerod,passingthroughthe
centreapertureontheabutment.
xi.Remove the slack in the brake rod by
adjusting the long ball nut, rear of the
balance bar, ensuring the overrun lever
makescontactwiththeend ofthetowing
shaft. Over-adjustment to the long ball
nut(Fig.10)couldinducemovementofthe
inner brake cable, reducing the effective
clearanceofthebrakeshoes.Iftheoverrun
lever will not make contact, it is possible
the two lock nuts, forward of the spring
cylinder, are incorrectly adjusted. Loosen
thenutsandadjustthebrakerodasabove
(Figs.8and10).
xii.Adjustthetwolockingnuts,forwardofthe
springcylinder(Fig.9)(onsomechassisa
single Nyloc nut is used) (Fig. 10) to give
1mm of clearance on the spring cylinder.
This cylinder (the energy store for the
handbrake operation) must be able to
rotateonly,notslideonthebrakerod.(See
Fig. 9) If the overrun assembly is tted
withagasstruthandbrakethennospring
cylinder is tted, therefore ignore this
paragraph.)
xiii. Correctadjustmentofthelinkageis
checkedbyoperatingthehandbrakelever
sothat whenthe secondor thirdtoothis
engaged, a slight braking force is felt on
theroadwheels.
xiv. Over-adjustmentofeitherthewheel
brakes or linkage will result in difcult
reversingcausingthewheelsto“lock-up”.
xv.When parking, the handbrake lever must
always be engaged into the fully upright
position (90°). This is to compress the
spring within the spring cylinder and
therebycreateanenergystore,whichwill
automatically engage the brakes further
shouldthecaravanmove.
xvi. If difculty is experienced in
this operation, try easing the caravan
backwards with one hand while engaging
the handbrake fully with the other. This
manoeuvre should not be attempted on a
rearwardsfacingslope. In this casewheel
chocksshouldbe usedcombinedwiththe
handbrake.