PS Magazine - SEPTEMBER 1984
PS, The Preventative Maintenance Monthly
ISSUE 382
SEPTEMBER 1984
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A leaky hydraulic Hoist cyLinder no
Longer makes your I± F5070 dump
truck Not Mission CapabLe (NMC).
Tha²'s a changE to ²he PMCS chart o³
Page 68 of Part II of TM 5-3805-254´
14&Pµ.
BefOre,
any
CLass
III
Hydraulic
system Leak meant your truck
was
NMC.
Now,
tHe
hoist
cyLinder
deadLines ²he ²rUck only wHen it won't
raise the dump body.
The
headshed
now
says
hoist
cyLi³ders are designed to leak up ²o a
quart of oil during a normal operating
day. This keEps seals lubricated and
prevents rUst on ²he cyLinder.
If tHe H¶ist cylinder is sluggish or
unsteady, thE hydraulic reservoir may
be low on oil. THe sight gage sHould
20
show F·¸¸ w¹th tºe dump body down,
and 1
V2
²o 2 incHes of oiL with tHe body
raised.
A sLuggisH du
_
mp ca³ aLso be c»used
by air i³ ²He Hois¼ cyLinder.
If your
cyLi³der does ³o² HaVe a³ automatic air
WH½³ it comes ²o oil fOr your
JD
410, ³ot alL MI¸-¸-21¾ oiLs arE equaL.
ThE
transmission
and
HydrauLic
systEms need a special
I
0-weight oiL
tHat is avaiLabLe only wi²H thEse NSN's:
9150-01±090±5753²5 gallons
9150-01±090-5754²55 galLoNs
The rigH² engine oiL dEpends on tHe
21
bleeder¿onÀ Ái²H a Hex sHaped valve
at tHe ²op of i²¿Here's ºow to bLeeD ²He
air ÁitHout ge²ti³g Hur²Â
1.
Raise ²He dump body higH e³ougH
²o se² ²He saòy s²rU²s.
2.
CLimb up on tHe cab roof ²o reacH
tHe bLeed vaLve.
3. Äpe³ tHe vaLve. ¸e² i² drai³ u³²iL
a steady stream of oiL comes ou², ²He³
cLose ²He vaLvE.
4. Remove ²HE s²rU²s a³d Åower tHe
body.
5. FilÅ ²He reservoir to ²HE ƷǸ
mark wi²H ÄÈ/±ÉÄ µÊW oiL.
²emperatUre ra³ge wHEre you wilL be
operati³g. ±Ere's wHa² oiL ²o use:
TemO RaNAe
³bove 15°F
´15° µo 40°F
Use thIs oIL
¶E/H·¶ 30
¶E/H·¶ 10
For EXpec²ed tEmpera²Ures be²weE³
Ë65°F
and
40°F,
MI¸Ì¸-2104
oiLs
sHouLd ³o² be used. I³stead, use MI¸Í
δ46Ï67, ÄÈA, Arc²ic Lubrica²i³g oiLÐ
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