GENERAL INFORMATION CU800 Service Manual
9
WARNING:
⚫ High Voltage Danger: Do not install fasteners with a strength classification lower than
what was originally installed by the manufacturer, doing so may cause equipment
failure and or damage.
1.6.1 Torque Specifications
The material used in the manufacturing of the EV may be subjected to uneven stresses if the
fasteners of the various subassemblies are not installed and tightened correctly. Fasteners that are
improperly installed or work loose can cause extensive damage. It is essential to use an accurate
torque wrench as described in this chapter.
1.6.2 Self-Locking Fasteners
Several types of bolts. Screws and nuts incorporate a system that creates interference between
the two fasteners. Interference is achieved in various ways. The most common types are the nylon
insert nut and a dry adhesive coating on the threads of a blot.
Self-locking fasteners offer greater holding strength than standard fasteners, which improves
their resistance to vibration. All self-locking fasteners cannot be reused. The materials used to from
the lock become distorted after the initial installation and removal. Discard and replace self-locking
fasteners after removing them. Do not replace self-locking fasteners with standard fasteners.
1.6.3 Washers
The two basic types of washers are flat washers and lock washers. Flat washers are simple discs
with a hole to fit a screw or bolt. Lock washers are used to prevent a fastener from working loose.
Washers can be used as spacers and seals. Or can help distribute fastener load and prevent the
fastener from damaging the component.
As with fasteners. When replacing washers make sure the replacement washers are of the same
design and quality
1.6.4 Cotter Pins
A cotter pin is a split metal pin inserted into a hole or slot to prevent a fastener from loosening. In
certain applications, such as the rear axle on an UTV or motorcycle, the fastener must be secured in
this way. For these applications. A cotter pin and castellated (slotted) nut is used.
To use a cotter pin, first make sure the diameter is correct for the hole in the fastener. Aster
correctly tightening the fastener and aligning the holes, insert the cotter pin through the hole and bend
the ends over the fastener, Unless instructed to do so, never loosen a tightened fastener to align the
holes. If the holes do not align. Tighten the fastener enough to achieve alignment.
Cotter pins are available in various diameters and lengths. Measure the length from the bottom of
the head to the tip of the shortest pin.
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