PS Magazine - TB 43-PS-517

PS, The Preventative Maintenance Monthly

ISSUE 517

DECEMBER 1995

PS Magazine - TB 43-PS-517 - Page 7 of 50

1

fter you unhook The aiR lINes F±om

youR T²uck, make Su±e all conNecToRs

aNd

recep³acLes are pRo³ec´ed by

dUmmy coupLiNgs.

WiThouT Them, dµ¶· aNd moisTuRe have

a clear shoT aT The lines ThaT ca±±y aiR To

s³op youR vehic¸e¹ GRiT can plug up a

valve aNd moisTu±e can rus³ iT shuT¹

Ei³heR way, you'±e b±akelessº

»o¼ when ³he ai± lines come o½¾ The

coup¿iNgs hangÀNg Nea± The T±ÁckÂs halF

couplings should go on¹ Hook The

TRaileRÃs ai± ÄiNes To The dummy con-

necTo±s on The TraileR FRame¹

ÅhaT proTecTs all aiR lines and helps

make suRe you have b²akes Nex³ ³ime

you need ³hem¹

PS 5±7

Make sure yoU use a veNTed dummy

coUplÆngÇ ÈÉÊ 2530Ë00Ì740Ë9445, oN

³he FRoN³ seRvIce bRake coupliNg oF ve-

hicles wI³h ai±

Ë

hydRaulic bRAke sysTemsÍ

¸ike MÎ9Ï

aNd

M8Ð9ÑseÒIes 5ËToN

TrucksÓ

WiThouT a venT¼ back pressure builds

up iN The aiRËhyd±aulic cylindeR wheN

you sTep oN ³he brake pedal. Åhe cyliN

Ô

de± can'T ±eleAse ai±¼ so b±akes lock upÕ

ÖF you have a veN³ed coupling¼ buT

BRaKes s³iJ× lock up, mAke su±e The ven³

is opeN. Ølow inTo i³¹ You shouLd Ùel

ai± comiNg Th±oughº ÚF noT¾ Take iT oFF

aNd clean iTÛ ÜÝT i³ d±y comp¿eTely beÞ

FORe puTTiNg ßT back onà

7

DEC 95

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