6
Location, Mounting and Enclosure
The location, mounting and enclosure of a genset
must be such that mounting is secure, engine ex-
haust and fuel vapors are prevented from entering
the vehicle, rain and road debris are prevented from
entering the genset, and ready access is afforded
for operating the genset and performing periodic
maintenance. See Figure 2 for typical genset loca-
tions.
1. The genset support structure must be able to
resist the dynamic weight of the genset: cyclical
vertical forces of
± 561 lbs (± 3 g) and cyclical
horizontal forces of
± 187 lbs (± 1 g). Secure
the genset with six 5/16-18 NC bolts. The bolts
must protrude at least 1-1/2 threads beyond the
base pan weld nuts but not more than 1/2 inch
(13 mm), to avoid interference.
WARNING
The genset can fall from the ve-
hicle if the supporting structure is weak and
cause severe personal injury or death. De-
sign the structure carefully, follow applica-
ble mounting kit instructions and torque
mounting bolts properly.
2. The genset can be mounted on or below the ve-
hicle floor:
A. Below-Floor Mounting - Use one of the
mounting kits available from Onan
(Page 22, 23 or 24). Follow the instruc-
tions in the kit and use Underfloor Tem-
plate 539-1535 to locate the assembly. A
plywood or particle board floor must be re-
inforced with steel to resist the dynamic
weight of the genset (Item 1). Do not
mount the genset within the approach or
departure angles of the vehicle or below
the axle line (Figure 7). If the floor is of
combustible material such as wood, install
a barrier of 26 gauge galvanized steel or
equivalent between the floor and the gen-
set.
WARNING
FIRE IS DEADLY! Install a
fire-resistive barrier of approved mate-
rials between the floor and the genset.
FIGURE 2. TYPICAL GENSET LOCATIONS
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