PREVOST LE MIRAGE XLII BUS SHELLS User Manual

Section 00: GENERAL INFORMATION
PA1553
9
5.1 SELF-LOCKING FASTENERS
A self-locking fastener is designed with an
interference fit between the nut and bolt threads.
This is most often accomplished by distortion of
the top thread of an all-metal nut or bolt or by
using a nylon patch on the threads. A nylon
insert or the use of adhesives may also be used
as a method of interference between nut and
bolt threads (Fig. 12).
FIGURE 12 : SELF-LOCKING FASTENERS 00004
5.2 RECOMMENDATIONS FOR REUSE
Clean, unrusted self-locking fasteners may be
reused as follows:
a) Clean dirt and other foreign matter from
the fastener;
b) Inspect the fastener to ensure there is no
crack, elongation, or other sign of fatigue
or overtightening. If there is any doubt,
replace with a new self-locking fastener of
equal or greater strength;
c) Assemble parts and hand start fastener;
d) Observe that, before the fastener seats, it
develops torque per the chart in table two.
If there is any doubt, replace with a new
self-locking fastener of equal or greater
strength;
e) Tighten the fastener to the torque
specified in the applicable section of this
manual;
Fasteners which are rusty or damaged should
be replaced with new ones of equal or greater
strength.
SELF-LOCKING FASTENER TORQUE CHART
METRIC
6 & 6.3 8 10 12 14 16 20
NUTS AND Nm 0.4 0.8 1.4 2.2 3.0 4.2 7.0
ALL-METAL BOLTS Lbf-in 4.0 7.0 12 18 25 35 57
ADHESIVE OR NYLON Nm 0.4 0.6 1.2 1.6 2.4 3.4 5.6
COATED BOLTS Lbf-in 4.0 5.0 10 14 20 28 46
US STANDARD
.250 .312 .375 .437 .500 .562 .625 .750
NUTS AND Nm 0.4 0.6 1.4 1.8 2.4 3.2 4.2 6.2
ALL-METAL BOLTS Lbf-in 4.0 5.0 12 15 20 27 35 51
ADHESIVE OR NYLON Nm 0.4 0.6 1.0 1.4 1.8 2.6 3.4 5.2
COATED BOLTS Lbf-in 4.0 5.0 9.0 12 15 22 28 43
5.3 SIX LOBED SOCKET HEAD
Six lobed socket head (Torx) fasteners are used
in some applications on vehicles covered in this
manual. The tools designed for these fasteners
are available commercially. However, in some
cases, if the correct tool is not available, a hex
socket head wrench may be used.

PREVOST LE MIRAGE XLII BUS SHELLS Specifications

General

Brand	PREVOST
Model	LE MIRAGE XLII BUS SHELLS
Category	Buses
Language	English