GENERAL INTRODUCTION
1–8
(3)
At time of rebuild, emissions-related codes or signals from on-board monitoring systems may not be erased or reset
without diagnosing and responding appropriately to the diagnostic codes, regardless of whether the systems are
installed to satisfy requirements in § 86.004-25 or for other reasons and regardless of form or interface. Diagnostic
systems must be free of all such codes when the rebuilt engine is returned to service. Such signals may not be ren-
dered inoperative during the rebuilding process.
(4)
When conducting a rebuild without removing the engine from the vehicle, or during the installation of a rebuilt engine,
all critical emissions-related components listed in § 86.004-25(2) not otherwise addressed by paragraphs (1) through
(3) of this section must be checked and cleaned, adjusted, repaired, or replaced as necessary, following manufac-
turer recommended practices.
(5)
Records shall be kept by parties conducting activities included in paragraphs (1) through (4) of this section. The
records shall include at minimum the mileage and/or hours at time of rebuild, a listing of work performed on the
engine and emissions-related control components including a listing of parts and components used, engine parame-
ter adjustments, emissions-related codes or signals responded to and reset, and work performed under paragraph
(4) of this section.
a.
Parties may keep records in whatever format or system they choose as long as the records are understandable
to an EPA enforcement officer or can be otherwise provided to an EPA enforcement officer in an understandable
format when requested.
b.
Parties are not required to keep records of information that is not reasonably available through normal business
practices including information on activities not conducted by themselves or information that they cannot reason-
ably access.
c.
Parties may keep records of their rebuilding practices for an engine family rather than on each individual engine
rebuilt in cases where those rebuild practices are followed routinely.
d.
Records must be kept for a minimum of two years after the engine is rebuilt.
2.
Maintenance instructions.
§ 86.010-38
(1)
For each new diesel-fueled engine subject to the standards prescribed in § 86.007-11, as applicable, the manufac-
turer shall furnish or cause to be furnished to the ultimate purchaser a statement that
"This engine must be operated only with ultra low-sulfur diesel fuel (meeting EPA specifications for highway
diesel fuel, including a 15 ppm sulfur cap)."
