PS Magazine - MARCH 1984
PS, The Preventative Maintenance Monthly
ISSUE 376
MARCH 1984
Vulcan Shoot Chute
Think "80± when you
or
replace an ammunition chute assembly
on your ML63AL Vulcan.
The feder, center and conveyor sec-
tions must tot²l 80 segments to prevent
Feeding and loading problems.
The problem oF segment count exIsts
because oF the new (NSN 1005³01´
078³9776) anD old (NSN 1005µ01¶005·
2825) conveyor ends that are in the
¸eld. ¹he old conveyor end has 2
segments and the new conveyor end haº
6 non³removable segments»
2 segments
"OLD± configuration
²NEW³ configuration
All Chutes and segments are inter¼
ChangeaBle, but when you matCh a new
conveyor end to an old Center section,
yOu've go½4 ¾ore segments than you
need. . . or want.
Solution: Remove 4 segments ¿om
the old center seCtion.
The magic number is 80 segments.
Too fw, or too many, wIll make
problems.
26
MAR 8
I
n
´µ¶-·¸¹º»¼
½¾¿ÀÁÂÃÄÅÆÇ
ÈÉÊË:Ì
·J
The liquid cooÀing system oF your
your support has to purge the system.
Ámproved HawkÂs ÁPAR keeps comÃ
Just replacing Filters won't solve the
ponents cool in the receiverÄtransmitter
probÀem, since the contaminated ÅS4Æ
(ÇT) and high volt²ge power supply
remaÈns In the system in the HVPS and
(HVPS).
RT.
Éoolant is routeÊ over the series
ÁF you replace the liquËd cooler Ìr
reguÀator tube in the HVPS and the frÍ
any
reason, get the system
Î
purged.
rite isolator, sÏbiÀitron tUbe, pulse
ÉonÏmiÐation can still be in the coolant
transFÑrmer anD charging Choke (reacÍ
lines.
tor) in the ÇT.
• Eyeball the coolant leveÀ. ÁF it's
Those components will overheat:
Àow, add
only
ÅS45 Type ÁÁ coolant.
1.
ÁF the coolant is ContamInated (as
A mix will cont²minate it.
with water)Ò
• Suspect Filters in overheating. ÁF the
2.
ÓF the cooÀant Àevel is lowÒ
RT meter readIng is higher than 160
3.
ÓF ¸lters are dirÔÒ
PSÓ or the ÕVPS reading is higher than
4.
ÁF you use the wrong cooÀantÖ
120 PSÁ, replace the ¸lters. Éhecks and
The ×ajor cause oF overheated com³
ponents in the ÇT and HVPS is conØ
Ù
t²minated coolant.
•To check Ìr water cont²mination,
eyeball the dipstick. ÁF you see water
droplets on It, or iF you suspect conÚ
Ûmination when you change FÜlters,
27
procedures are in Tables 3³10 and 3Í16
and Para 4³11 oF your Í12Í1 TM. ÁF
meter movement Ýutters up anD down,
your ÝuId probably is just low. Án
which case, add ÝuId.
ÁF overheatIng Continues aFter you've
checked out the coolant, troubleshoot
and get help Þom support, iF necessary.
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