PS Magazine - JULY 1984
PS, The Preventative Maintenance Monthly
ISSUE 380
JULY 1984
There's a torque wrench authorized
in your No. 2 Supplemental shop set
that's a real mechanic's gem.
This 1,200
lb-ft capacity wrencH
weighs about ±9 pounds. Its 800:
I
geAr
means yoU need only 6²7 lb³ft inpUt on
the handcrAnk to get 1,200 lb³ft oUtpUt
torque at the nut.
The
wrenc´,
NSN
5±20µ00³169-
2986, comes with its own carrying
case, a handcranK And a 6³in Long,
3/4¶in square drive bar. T´e 3³piece
reaCtion bAr needed is NSN 5120µ01³
008-3632.
Wrench
HandCraNk
1
Jj
,
.
16
Mount t´e paddle³shaped reaction
adapter to t´e base of t´e wren·h.
UsE t±E s±oulDER
sCREws pRoviDED!
1
-
-
Set the rAtc´et for clockwise oUtpUt.
TUrn the knurled collar Until t´e mark
on t´e coLlar Lines up with t´e ¸ar¹ on
t´e output shaft. (On oLder ¸odels
º
you
´Ave to lift t´e ratchet Locking pi» to
turn t´e collar.) Insert the drive bar.
JUL 84
TUrn it clockwise to ¸a¹e sure
ratchet pawLs ´ave been engaged¼ YoU
don't want the ratc´et to Let go when
yoU start to apply torqUe.
Run down t´e nUt to be torqued Un½
til it
º
s tig´t.
Place a 3/4-in drive socket on the nut.
Put t´e drive bar in the soc¹et.
¾ine up the wrench with the drive
bar. You can use the wrench Like a
regU¿ar ratchet wrench to seat t´e nUt.
JUL 84
±7
and ratchet in t´e direction to tig´ten
the nUt. Tig´ten Until yoU see about
i
00
Lb³ft on t´e diaL.
²Est baR
agaINst
A RigiD
suRfaC³
Rotate the wrenc´ untiL t´e reaÀtion
bar rests against a rigid surFce. This
is
aLways in the opposite direction
you Áre
torquing.
When you torqUe
clockwise, t´e reaction is in the op½
posite directionÂcounterclockwise.
Torqu±ng
TUrn
t´e
handcran¹
cLockwise.
Tighten the nut to t´e required torque.
TAke yoUr ´and oà the handcrank
and wait
I
¸inute. The torque will back
oÃ. T´is's because the torqUed bolt's
\
tÄist is reLaxing and the t´read sUrFces
a re seating.
Retorque. Then wait
²
minute again
fÅr the torque to bAck oÆf. Retorque
once ¸ore. The torque should stay pUt.
·
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