Chrysler 1956 Windsor - Pedal Free-Play Adjustment; Adjusting for Maximum Performance; Lubrication; Assembly of Pedal Linkage in Pedal Bracket

Adjusting Fo r Max im um Perfo nn a n ce
If th e above adjustments are correctly made,
satis factory brake booster performance s hould
be obta ined . Ho wever , due to variations within
th e bra ke boos ter, additi o na l adjustment may
occas io na lly be necessary to elminate the fol-
lowing co nditi ons :
If the pedal pr eRs ure releases slowly, adju st
by rota tin g pow er lev er adju s tment screw in a
c ounter-clockw i se directi on (Fig. 17).
A ti me delay (no ted during a fast b rake ap-
plicati on ) c an mlUally be co rrect ed by makin g
a clo ckwise a dju s tmen t on th e adjus t ing screw .
Sh ould the pedal vibrate (boo s ter chatter),
mak e a counter-clockw i se adj usting s crew ad-
just ment.
NOT E: Rota tion of ad justment s crew sh ould
IJe limit£d to"* 90° ab o ut original .'1 et ti ng.
Assembly of Pedal Linkage In Pedal Br acket
CAUT IO N: Us e ex trem e ca re du ri ng assembly
or han dling of th e linkag e, as the pO lV er brake
pedal tri gg er a1 'm is easily dam.aged.
After rein st alling brake pedal linkage in pedal
bracke t, a woo den wedge should be placed be-
twee n t he po wer brake lever and the forward
edg e of th e triangular hole in the pedal bracket
(if po wer uni t has been rem o ved) (Fig. 16).
This will prev e nt the tr igger arm from extend-
ing be yo nd the extremities of the bracket.
Lubrication
Except for an occasiona l few drops of SAE 10
Eng ine Oil on the power brake lever pin bush-
ings , the b rake pedal linkage requires no fur-
th er lub rication.
The po wer unit will r equire no lubrication
und er normal us e. If the unit is dis assembled
fO!' o verhaul or repair. all s eal and "0" rings
and ce rtain ot her parts mus t be suitably coated
wit h silicone gr e ase before assembly.
Pedal Free-Pl ay Adjustment
Aft er the master cylinder , bo oster, and pedal
link age are completel y installed (and the wood-
en wedge removed - if used), a free-play ad-
jUstme nt check should be made at no vacuum
(e ng ine s topped) as follows:
In se rt blade of a screwdriver between rubber
collar of the po wer brake trigger pivot and the
power brake lever, forcing them apart.
18
NOTE: /f the bmk e pedal and the po wer bmke
lever are not w edged apar t, a false fr ee -pl ay
s etting (w hich includes boost c' )' valve tra vel)
win lie rn c a..~ u1" ed at the pad erld of the pedal.
Check free-play, with linka ge in thi s position,
by pushing lightly at the pad end of the brake
pedal (Fig. 18) . Pedal free-pla y s hould be be-
tw e en ~~2 and 1 /8 inch.
If pedal free-pla y movement does not corne
wit hin th e required limits, adju s tment is made
by len gt hening or shortening the push rod as
required.
Al t ernate Method of Measuring Pe d al Fr ee- Pl ay
Remo ve mast er cylinder push rod end pin .
Us ing li ght finger pressure, move pURh rod
forward until contact is made with master cyl-
inder piston.
A tt empt to insert the push rod e nd pin
through the power level' and push rod end hole.
If the push rod must be pulled ba ck to allow
pa ss age of t he push rod end pin, free-pla y is
present.
If the push rod must be pushed further into
the master cylinder, to allow pas s age of push
rod end pin, the re is no free-play and an ad-
justment must be made at the push rod.
Fig. 18 - Ch ecking Pedal Free-Play
----
I