TM 5-3810-307-24-1-1
NOTE
Torque Values.
If multipliers and/or special tools are
Torque all turntable bolts to 370 lbs-ft (501.6 Nm).
used to reach hard to get at areas,
ensure torque readings are accurate.
Tools Required.
Torque wrenches are precision instruments and
must be handled with care. To ensure accuracy,
special tools required to torque the turntable bolts.
calibrations must be made on a scheduled basis.
Whenever there is a possibility that a torque wrench
Inner Race Torquing.
may have been either over-stressed or damaged, it
should immediately be removed from service until
1.
Fully extend and set the outriggers.
recalibrated. When using a torque wrench, any
erratic or jerking motion can result in the application
2.
Torque bolts 1, 20, 11, 30, 6, 25, 35, and 16, in
of excessive or improper torque. ALWAYS use a
that order, to 296 lbs-ft (401.3 Nm), refer to Figure 2-
slow, even movement and STOP when the
9-3.
predetermined value has been reached.
3.
Return to bolt 1 and torque each bolt
It is reported by the crane operator or suspected that
sequentially in a clockwise direction to 370 lbs-ft
the crane has been overloaded beyond the
(501.6 Nm).
capacities specified above the bold line on the
cranes' capacity chart, then all turntable bolts must
Outer Race Torquing.
be inspected for looseness and retorqued to
specifications.
1.
Fully extend and set the outriggers.
Turntable bolts should be torqued diametrically
2.
Torque bolts 1, 19, 10, 28, 5, 23, 14, and 32, in
opposed, working in sequence from one side of the
that order, to 296 lbs-ft (401.3 Nm), refer to Figure 2-
circle to the opposite side, rather than tightening
9-3.
adjacent bolts successively. Torque first to 50%,
then to the final torque value.
3.
Return to bolt 1 and torque each bolt
sequentially in a clockwise direction to 370 lbs-ft
When using step wrenches, calculated wrench
(501.6 Nm).
settings are valid only when the following conditions
are met.
REMOVAL.
1.
Torque wrenches must be those specified and
1.
Fully extend and set the outrigger enough to
forces must be applied at the handle grip. The use
take up the slack in the pads.
of handle extensions will change applied torque to
the bolt.
NOTE
2.
All handles must be parallel to the step wrench
Do not raise the crane on the outriggers.
during final tightening. Multiplier reaction bars may
be misaligned no more than 30 degrees without
2.
Ensure the boom is in the travel position and
causing serious error in torque.
the swing lock is engaged.
3.
Multiplier bar handles must be propped or
3.
Elevate the boom slightly and shut down the
supported within the outer of the handle length, or
engine.
serious under- or over-tightening will occur.
4.
Remove the boom following the procedures
The inner race of the bearing is secured to the
outlined in Section 10, BOOM.
turntable by 39 in. Grade 8 bolts. The outer race
of the bearing is secured to the carrier frame by 36
5.
Tag and disconnect the battery cable from the
in. Grade 8 bolts.
battery.
2-9-13
