PS Magazine - TB 43-PS-430
PS, The Preventative Maintenance Monthly
ISSUE 430
SEPTEMBER 1988
Valve Lever Adjustment
Mechanics, If you get a report that the spring brakes do not hold, your F±rst
step is the sprIng brake valve at the base of the Park²ng brake lever. The valve
lever must be horIzontal to the cab floor and valve body. TM 9-2320³272´20
does not say how to adjust the lever to horizontal level, so here's how:
•
Remove the scµews that hold the
valve.
•
Tu¶ the vAlve over and loosen the
se· screw.
•
¸djust the Lever aµm until it is par¹
allel to the valve bodyº
•
TIghten the screw and put the valve
back on.
»ull the hand parking braKe on and
then let iF o¼ a couple oF times. ½f the
valve leveµ doesn't go back to the hori¹
zontal position, replace the valve with
NSN 4820¾01³187¿9542º
M939A 1-Series TRucks .±±
Quick Fix for Brake Hose Rub
There are two hoses to each brake a²r
chaÀber on ·he Áont wheels of these 5Â
·on trucks. The ones next to the tires
are a ha²r too long. Tires rub against
the hoses during a hÃrd tu¶.
BefOre you know it, a tIre rubs a
hole ²n a hose. ¸ir escapes. WhaÀ!
BaÄÅ The braKes lock.
You Àechanics can prevent th²s by
Ʋng ·he elbow between the hose and
a
chaÀber. The crook ²n the elbow
is pointed toward the tire, which Puts
the air hose in harm's way.
Tu¶
·he
elbow
45 degrees
and
tigh·en it down. TH²s holds the hose
away Áom the tire in the tUÇs.
²6
SEP
88
2³´-ton µRUcKs ±±¶
TÈere's been a change to the 3,000´Ài/seÉannual section oF Note 8 oF ÊË
9Ì2Í20Ì209Ì Î2. Ïow there's Ðo Ðeed to adJÑs· the sPring sea· beÃring Ðuts when
you lube the spriÐg sea·.
Òзil you get a revised ÓË, lube ·he
sPring sea· lÔÕe soÖ
×eÀoVe tØe PÙPe Plug at the bot·oÀ
oF ·Èe sÚÛÔÐg seat, aÐd screÜ iÐ a grease
F±·tÔÐG.
ÓooseÐ ·Èe screws oÐ ·Èe beÝiÐg
CaÚ. BaCk them ou· a Þlß ·u¶ or so.
»ÑÀP
àá¸
tÈroÑgh
âttiÐg
uзil
GÛease CoÀes ou· aroÑnd ·he caP.
TiGÈ·eÐ ·Èe screÜs ·o Î6 ·o 2ã läÌå.
×eÀove tÈe æi··ing and rePßace the
ÚiPe Plug. WiPe oç ·he ex·ra grease.
SeP
88
·7
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