PS Magazine - TB 43-PS-544

PS, The Preventative Maintenance Monthly

ISSUE 544

MARCH 1998
PS Magazine - TB 43-PS-544 - Page 9 of 48
Brakes .±±
(
f
±!
§
ummy
couplings protect aIr line connecTors and receptacleS onLy when yoU
Use Them.
±f you don't use them, dIRt and moisT²Re have a cLear shot aT the lInes ThaT caR³y
aiR To stop youR vehicle´ GµIt can pl²g up a valve and moisT²Re can rUst It shuT¶
leaving you bRakelesS·
When yoU Unhook the air lines¸ puT the DUmmy Couplings on the trUck¹s halF
co²pºings. Hook the trailer»s air ºInes to the dummy connectors on the tRailer
Frame´
Make sure you use a vented d²mmy
coupling¼
NSn 2530-00²740³9´45,
on the ½ont servIce Brake coUp¾Ing
o¿ vehiclEs with aiµ-hydraUlic Brake
systems¸ such aÀ M39Á and M809Â
seµIes 5-Ton tRucksÃ
WiThoUt a ventÄ Back press²re
Builds ²p in TÅe aiR-hydraulIc cyÆInÇ
der when you step on the Brake pedalÈ
Éhe cyÊInder canËt release ai³¸ so b³akes lock upÌ
±¿ you have a vented coupling¶ BuT bRaKeS stIll ÍocK up¸ make s²Re the vent Îs
openà ÏLow inTo ItÐ You shouLd FÑeL aIR comIng thRo²gh´ ±F noT¶ take IT oÒÓ and
cÔean It in soapy waTeR. Õinse and let It dry compLeteLy BeÖoRe p²t×ing ØT Back on.
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