PS Magazine - JUNE 1978
PS, The Preventative Maintenance Monthly
ISSUE 307
JUNE 1978
AIRMOBi
A mech pulLing
PM
and his torque
wrench shoulD never be parted . . ±
especially when it comes to the' low
torque ra_nges. Some mechs go over-
board
tightening
harDWare beYond
liMits.
This
Damages
parts
and
siDelines aircraft²
Take
the
T53³´µ13
engine,
for
example¶
·uring
inspections
you
eyeball and clean the power turbine oil
strainer¸
It¹s no sweat to remove the oil line
witH an openºend wrench on the "B»
But removing a strainer housing
adapter that was tightened beyond
liMits is something else¶ If a mech diD
not
use
a
torque
wrench
during
strainer
installation¼ you½ve got
engine change in your future.
¾ow come? ¿ell, to remove
strainer aDapter takes extra muscle± As
a result the unseen safety on the oil
tube (uNder the fireshielD) breaks and
the oil tUbe becomes loose, giving you
an oil leak.
Yot wouldn'T believe The Work your
supporT Types do ±o Take off ThE
fireshield, main fuel maniFOld and
oTher parTs . . . all because a ±orque
Wrench Was noT used²
³Course,
you
Would use a Torque
Wrench When you pu± ±he s±rainer back
in ±he engine, righT? Because ±haT´s ±he
Word in Para 5-90 of µM 55¶2840¶229¶
24 (Apr 71)²
µhe µ53-L-13 engine sTrainer geTs
TighTened To 80·90 lb-in¸no more!
¹nly The Torque Wrench is calibraTed To
give
a
ºech The righ± amounT oF
»uscle.
¹f course, ±he engine ¼ub also says
The "B½ nuT on The oil line also geTs
Tigh±ened WiTh a Torque Wrench To
only 50¾100 lb¿in To prevenT sTripping
Àhreads on The s±rainer housingÁ A
croWfooT on The Torque Wrench does
The Trick.
When us±ng a
crowfoot longer
Than th±s-
f±gure torque
per F±g 6²61, ³m 55²
1500´204²25/1.
ÀoÁ
head FÂr
the tool crib and pick up
tÂose torque wrEncÂes. ÃtÄs the only
road to
T
a
k
e.
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