PS Magazine - TB 43-PS-428
PS, The Preventative Maintenance Monthly
ISSUE 428
JULY 1988
HMMWV's .±.
Warm Up to GOod Starts
ly-7±:²=³´?µ¶·¸;¹r
I DON'T KnoW
Dear Half-Mast,
I've noticed that on some
HMMWV's, the voltmeter needle
w±L dip into the ye²ow or red for
shoR periods after the engine is
started. We also hear a c³ckinG
noise´ The needle moves to
Green and the noise stops after
the enGine reaches normal operµ
ating temperature, about
190
°
F
Is this caused by a bum glow
plug relay?
SS¶M.M·M´
Dear Sergeant
M.m±m²,
BUt ³Hi
vOLTmER
´5 dµPp¶·& ¸¹º
»f
Yeltw/
No the clicking and the voltmeter drop are caused by tHe glow Plugs cycling
on and of It's normal For This to Happen aFTer tHe engine starts. It helps The
engine run smoother UnTil it warms Up to operaTing temperatUre.
When The glow plugs cYcle on, TheY pUll a lot oF current-p to
¼ 2½
amps. ±hat
Makes The volTMeter dip into The Yellow or²n some cases³he red.
´he clicking coMes µoM the glow plUg relaY in The protecTive conTrol box.
I
the clicking and the voltage drops conTinue aFteR the engine reaches oper¶
aTing temPeraTure· get YoUr mechanic To check it oUT.
#a/ºf
A
4
JU²88
Dear Ha¸-Mast,
¹
There Are no highway load classifications Given for several tacticaº
vehicles listed in »Ppendix
C
of FM
5-36³
The FM dOes have a crossµ
coun¼ rating for the vehicles, but what do ½e use when we run the¾
on the road?
¸ighwaY raTings are now the same a¹ cross¶coUnTº loaded raTings. A tactical
TrUck is raTed bY iT»s cross¼coUnTº capaci½. In The past, a trUck was allowed to
carº Up To twice the paYload when rUnning on highwa¾s¿ ´he highwaY raTing was
based on That higher gross veHicle weighT. Since tHe ArmY banned overloads,
There's no need For a separaTe highwaY loaded load classÀicaTion. Áse The cross¼
coUnTº raTing.
»¼F
A
cuc´ and HMMWV µ.¶
TRAn±Mi±±I²n PAN gA±ke³
Seems CUCV and HM± transmission oil fLteR kits, NSN
¾¿¾À"ÀÁ-Á¾Á-
63¿ÀÂ
come wiT a transmission oi² pan gasket Tat won't ft eitheR vehicle. When
you get one like Tat, send
Ã
a ³epor´ oF Discrepancy, Sµ
364Ä Å
you need just Te
pan gasKet, ge´ i´ wi¶· NSN
¿33À-ÀÁ-Á48-74ƾÇ
H´´WV Fuel FILµER ¶·¶
Use NSN
È33À-ÀÁ-ÁÆ8-7ÉÆÀ
´o get Te ¸el ¹lter element shown as I¶em
7 Ã
ºig
Á¿
oF »¼
Æ-¾3¾À-¾8À-¾ÀÊË
Make a note un¶il youR
-¾À
»¼ is updated½
JU· 88
Ì
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