PS Magazine - AUGUST 1984
PS, The Preventative Maintenance Monthly
ISSUE 381
AUGUST 1984
21±-Ton trucks .²³
Dear Half-Mast,
We've replaced so
many inner axle
seals on our
21±-tonners, we can
do it blindfolded.
After we install
them and get the
trucks rolling, gear
oil starts leaking
:
from the axle hous²
ing into the steering
knuckle boot again.
What³s the sOlu²
tion to this Problem?
SP4
D´
I. K±
AUG
8
Dear Specialist D. I.
k,
According to the headshed,
you 're not supPosed to repLace
the ±le seal separately, but
R²thEr as part of the re-
taineR/seal assembly³NSN
5330-00²075³176´µ
Tis way,
you can be sure the seal is i´µ
stalLed properly¶ Te seal's
aLready pressed into the retainer
a·¸ faces the right d¹rectionº
seal lip toward the ±le
housing.
»egardless of how you instaLl
the new assembly though, it
won't heLp ¼F the axle housing
breather valve is clogged with
axle
hOUSiNg
¸irt¶ Heat a·d pressure build until the seal blows, causing a leak.
A ·ew seal will just blow ¼F the breather is plugged.
½wist the breather cap to remove dirt, an¸ tap it to make sure
3
´ap µhe Cap ¶··
aNd maKe SURe
iµ bOUNCeS
the spring¾loaded valve inside
works.
If all else fails, could be the
¿Xle shaÀ within the ±le hous-
ing is misaligne¸Á Get your
DSU to check it.
lof
Jft
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