User Manual

200 GENERAL INFORMATION
Page 1-3
ENGINE MODEL
IDENTIFICATION
Engine Information Plate
All engines are identified by an engine
information plate located on the front valve cover
of the engine. This plate indicates the engine’s
11GBA number, emission standards, serial
number and various engine adjustments. The
engine is also identified by the serial number
stamped into the cylinder block above the timing
cover on early engines, or on the pad just to the
rear of the air compressor on later engines.
For some current MACK engines, the engine
information plate also includes pertinent
emissions characteristics of NO
x
and particulates
unique to that engine.
A given MACK engine may meet federal emission
regulations in 49 states (excluding California) or
an engine may meet emission regulations of all
50 states (including California). To determine
which regulations a given engine meets, refer to
the engine information plate. If the engine plate
has a series of dashes in the long upper-left
block, and two dashes in the CALIF. FAMILY
block, the engine does not meet California
regulations.
Figure 3 — Engine Information Plates
New Engine Information Plate
The following explanations are provided to aid in
interpreting some of the key information found on
the new engine information plate (effective late
1996). Refer to Figure 1-4.
Block 1 — U.S. EPA Regulations
앫 An “X” in block one means the engine meets
United States EPA regulations for the year
stamped in block No. four.
앫 Two dashes in block one indicates the
engine does not meet United States EPA
regulations for the year stamped in block
No. four. This is only permissible with certain
export engines. All domestic engines will
have an “X” in block one.
Block 2 — California Regulations
앫 An “X” in block two indicates the engine
meets California emissions regulations for
the year stamped in block No. four. This
engine is referred to as a “50-state” engine
and can be sold in any state throughout the
U.S.
앫 Two dashes stamped in block two means
the engine does not meet California
emissions regulations. If an engine has an
“X” in block one and two dashes in block
two, it is referred to as a “49-state” engine,
meaning it is not certified for sale in
California.
5-101.bk Page 3 Friday, March 17, 2006 11:05 AM