PS Magazine - JULY 1985
PS, The Preventative Maintenance Monthly
ISSUE 392
JULY 1985
Multifuel Engines .±±
60 PSI
vs
120 PSI
Pressure peaking at 60 PSI on your
multifel engine's oiL pressure gage?
Don't panic .
.. yet! Cou±d be the gage
and matching sending unit can't hand±e
what the truck's power plant is putting
out. ²F so, switcH to a 120 PSI pressure
indicator, NSN 6620-00-115-9042,
and matching sending unit, NSN 6620³
00-993-5546. ´or some engines, oi±
pressure up to 75 PSI, and even 110
PSI, is norma±.
Pressure gaGe
NSN
6620-00±1²5-9³2
Pressure trAnsmiTteR
NSN
6´20µ00µ9¶3-5·6
IF pressUre is nORmA±±y B±ow
6
PSI, keep Te gage and sending Unµt you've got.
CHange 'em o¶±y wHen:
·¸60 PSI pRessURe gage is not woRking
¹MatcHing sending Unµt is not woRkµng
¹PRessUre is hµgHeR tHan 60 PSIº
NeveR mismatcH a 120 PSI gage witH a 60 PSI sending Unµt or vice veRsa.
2 1/2-, 5-Ton TrUcks ².³
Limit the Door Swing
»He dooRs on yoUR M¼³, M3½³and
_±
²²
²³ ´
,.µ¶-·
¸¹º »¼
M809¾seRies trUck open so wide they
can hit tHe Rearview mµRror, smasHing
door g±ass, ¿RRoR and braceº
»o prevent tHis, rep±ace the door
cHeck rod with rod, NSN 2510¾01-
084¾9633. It wµ±± stop tHe dooRs Àom
swinging too ÁRº »His is the same rod
Used on M939¾series 5¾ton trUcksº
44
JUL 85
´-µOn µRucKs ±±±
ReflEct On Mir±or Pa²s
\6³´µC,. QU W¶LL·L b9¸2
You Âan't get complete mirror assemÃ
blies
Är
your
Å39-series,
Å809-
series or Å93Æ-series 5-ton truck.
Çn±y repair parts are Èvai±able, as
listed inÉ
¸M 9-¹º¹0»¹11-¹¼P, FIg ¹00
¸M 9-2º¹0µ¹60-¹¼P, Fig ¹¹-9 and ¹¹»10
¸M 9-¹º¹0-¹72-¹0P, FIg ¹90
NSN's
Är mirror assemblies are
no good.
M39¶· M809-Series Trucks .¸.
Tough Toolbox
»ired oF ±osing tools Àom tHe too±Ê
box on your 5-ton truck?
Some ±ow-down polecats have been
known to bend back the coËer oF the
door and remove tools.
YoU can head this oÌ by having the
door reinÄrced by we±ding on a piece
oF 3/4¾in by Í/4-in ang±e iron¹like
NSN 9520¾00¾277-5983¹across the
inside oF the door.
JUL 85
45
M939 Se¹ies ±º±
on mirror
ASSembly
Control Box
Use
NSN
2½90-01-
144-86¾4
¿o ge¿ the
protec¿ive control box
ÀÁte ¾ iN fig 49 oÃ
¸M 9-¹320-¹72-¹0PÄ
Ãor your M939-series
½-ton ¿ruck.
l
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