Challenger Terra Gator 3244 Chassis. Manual - part 15
627333-A
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Torque Specifications
TIGHTENING STRAIGHT THREAD
FITTINGS
Straight thread hydraulic fittings require precise
tightening. Overtightening of hydraulic fittings ruin
sealing surfaces and require replacement of damaged
parts.
Proper initial tightening depends on mating parts to be
connected. Proceed as follows:
An adapter fitting (37° flare) connected to a double flare
tube assembly. Fitting must be tightened finger tight
and wrenched 1/2 turn (for single flare, 1/4 turn).
An adapter fitting (37° flare) connected to a hose.
Fitting must be tightened finger tight and wrenched 1/4
turn.
An O-ring adapter fitting connected to a solid port.
Fitting must be tightened so backup washer contacts
face of boss after fitting has been properly positioned.
To retighten after initial tightening, as in service work,
both tube and hose connections should be tightened
finger tight and wrenched 1/4 turn. O-ring fittings should
be tightened as for initial assembly.
JIC SWIVEL NUTS (37° SEAT). Following values are
maximum recommended torque values for JIC (37°
seat) swivel nuts either swaged or brazed type. Swivel
nuts will normally withstand this torque for a minimum
of 15 repeated assemblies.
Torque required to seal swivel female fittings or hose
couplings to a male connector depends on many
variables such as fluid medium, pressure, surface
finish, etc. The following values are intended only as a
guide for maximum values the fittings may be subjected
to.
DASH SIZE
TUBE O. D.
(REF.)
TORQUE MAX
Nm
lbf in lbf ft
-4
1/4
12
110
9
-5
5/16
20
180
15
-6
3/8
27
240
20
-8
1/2
40
360
30
-10
5/8
54
480
40
-12
3/4
95
840
70
-14
7/8
110
980
80
-16
1
120
1080
90
-20
1 1/4
160
1440
120
-24
1 1/2
180
1575
130
-32
2
400
3600
300
-40
2 1/2
540
4800
400
-48
3
680
6000
500