Onan DKHA Series, Installation Manual

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3-2
CUSTOMER FABRICATED TAILPIPE
Tailpipe Adapter
Tailpipe adapter 155-2610 must be used with a cus-
tomer fabricated tailpipe. Mount the adapter on the
muffler outlet flange using the flange gasket and
screws packaged with the tailpipe adapter. Torque
the flange and bracket screws to 19 ft-lb (26 N-m).
The flange gasket must be used.
Tailpipe
1. For the tailpipe, use 1-3/8 inch I. D. aluminized
steel tubing or equivalent .
2. Use U-bolt muffler clamps to connect sections
of tailpipe. It is recommended that the overlap-
ping pipe be slotted as shown in Figure 3-2.
3. Support the tailpipe every 2 to 3 feet (60 to
90 cm).
4. Do not terminate the tailpipe underneath the
vehicle cab or living space.
5. Do not route the tail pipe near fuel lines or fuel
tanks or terminate it below or near a fuel fill
opening.
6. Route the tailpipe such that it is visible along its
entire length and accessible for replacement.
7. Route the tailpipe such that it will not likely be
struck when the vehicle is moving.
8. Exhaust back pressure under full load must not
exceed 2 inches (51 mm) water column (WC)
as measured within 6 inches (154 mm) of the
muffler outlet flange.
CAUTION
Excessive back pressure can
cause loss of performance and engine dam-
age.
3/4 INCH (19 MM)
MAXIMUM SLOT
(BOTH SIDES)
FIGURE 3-2. EXHAUST TAILPIPE CONNECTIONS