Approval Details

Valid E.O.


This Executive Order approved the specified parts on on January 13, 1982.
As of Monday, October 21st, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

1974 and older California certified, and 1978 and older Federal certified Cummins 855 CID 6-cylinder engines

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-120
  • Executive Order 120 / D120
  • ARB # D-120
  • Executive Order No: D-120
  • C.A.R.B. No. D-120
  • Resolution D-120
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-120 PDF

D-120 Document:

                                                                    (Page 1 of 2)

                            State of California
                            AIR RESOURCES BOARD

                        EXECUTIVE ORDER D—120
              Relating to Exemptions under Section 27156
                         of the Yehicle Code

                             CUMMINS WEST
                        855 CID DIESEL ENGINES

 Pursuant to the authority vested in the Air Resources Board by Section 27156
 of the Vehicle Code; and

 Pursuant to the authority vested in the undersigned by Sections 39515 and
© 39516 of the Health and Safety Code and Executive Order G—45—5;

 IT IS ORDERED AND RESOLVED: That the modification of 1974 and older
 California certified and 1978 and older Federally certified engines by Cummins
 West, Inc., has been found not to reduce the effectiveness of required motor
 vehicle pollution control devices and, therefore, is exempt from the
 prohibitions of Section 27156 of the Vehicle Code for Cummins 855 CID 6
 cylinder engines.

 This Executive Order is valid provided that installation instructions for this
 device will not recommend tuning the vehicle to specifications different from
 those submitted by the device manufacturer.

 Changes made to the design or operating conditions of the device, as exempted
 by the Air Resources Board, that adversely affect the performance of a
 vehicle‘s polliution control system shall invalidate this Executive Order.

 Marketing of this device using an identification other than that shown in this
.Executive Order or marketing of this device for an application other than
 those lTisted in this Executive Order shall be prohibited unless prior approval
 is obtained from the Air Resources Board.        Exemption of a kit shall not be
 construed as an exemption to sell, offer for sale or advertise any component
 of a kit as an individual device.

 This Executive Order does not constitute any opinion as to the effect that the
 use of this device may have on any warranty either expressed or implied by
 the vehicle manufacturer.


 No claim of any kind, such as "Approved by Air Resources Board" may be made
 with respect to the action taken herein in any advertising or other oral or
 written communication.

                                                     (Page 2 of 2)

Section 17500 of the Business and Professions Code makes untrue or misleading
advertising unlawful, and Section. 17534 makes violation punishable as a

Section 43644 of the Health and Safety Code provides as follows:

     "43644.    (a) No person shall install, sell, offer for sale, or advertise,
     or, except in an application to the state board for certification of a
     device, represent, any device as a motor vehicle pollution control device
     for use on any used motor vehicle unless that device has been certified
     by the state board.     No person shall sell, offer for sale, advertise, or
     represent any motor vehicle pollution control device as a certified
     device which, in fact, is not a certified device. Any violation of this
     subdivision is a misdemeanor."

Any apparent violation of the conditions of this Executive Order will be
submitted to the Attorney General of California for such action as he deems

Executed at El Monte, California, this_     /31'&‘      .day of January, 1982.

                                    kB chrrruy
                                    K. D. Drachand, Chief
                                    Mobile Source Control Division

                                State of California
                                AIR RESOURCES BOARD

                                    Staff Report

                         Evaluation of Cummins West, Inc.,
                         Engine Modifications in Accordance
                         With Section 2222, Title 13 of the
                           California Administrative Code


      Cummins West, Incorporated, of San Francisco, California, and Cummins

Service and Sales, Inc., of Los Angeles, California, are independent

corporations franchised by Cummins Engine Company, Incorporated, to provide

aftermarket engines, parts, and service for users of diesel Cummins engines in

California.   Cummins West, Inc., acting in behalf of both companies, has

applied for an exemption from the prohibitions of Vehicle Code Section 27156

for an uncertified engine configuration.     These Cummins franchises propose to

upgrade older certified engines to the hybrid specification which utilizes

some components of more recent engines.     The purpose of this modification is

to improve fuel economy.


      The applicant proposes two different parts packages to be used in

rebuilding certain 1973 through 1978 Cummins 855 CID engines.      One will

produce 300 HP, the other 350.     These packages will replace nine existing

engine configurations.     Tables I and II list these parts.   TableIII contains

the injector timing specifications.

      The fuel injection rate is controlled by the output pressure of the

injection pump.     This pressure is a complex function of engine speed and power

demand.    The power curve of the engine is defined by the pump calibration.

Cummins Engine Company has thousands of these calibrations.     The count of the

calibrations applicable to CPL 021 and 024, respectively, is 37 and 8.

Cummins West has submitted two additional calibrations which are not in the

Cummins list.     The 350 HP calibration is very similar to the 3077 calibration

of the CPL 024 engine which meets 1975—76 standards.     The 300 HP calibration

does not appear to closely match any published calibration.     It is simtlar,

however, to a 1974 calibration from CPL 174.


      On October 29 contact was made with Mr. Robert Ryan of the Cummins

Engine Company‘s Engine Certification Laboratory in Columbus, Indiana.      He is

of the opinion that these modifications will have no adverse effect upon

emissions.    He also stated that Cummins West had submitted a modified engine

to the evaluation.     Emissions testing of the engine was to be conducted in

about three weeks from that date.

      Although it is probable that the selected components will assemble into

an engine which meets the 1977—78 California emissions standards, it is felt,

that without supporting test data, the staff can only predict with reasonable

certainty that the 1974 California and 1978 federal standards will be met.


      The staff finds that the Cummins West modification to Cummins 855 CID

Cummins diesel engines will not result in increased emissions from engines

designed to meet the 1974 and earlier California or 1978 and earlier federal

emissions standards.     It is, therefore, recommended that E.0. D—120 be


                                         Table I

                                  Cummins West 350 HP

                                    Engine Parts List

Item                       Cummins No.              Years Certified
Injector                   3018834—178A               197378(
Camshaft                   143450                     1973—78

Piston                     3017349                      1981
Turbocharger               3018068                    1980—81

After Cooler               3001519                               (2)
Exhaust Manifo1d           3801222                               (3)

                                         Table II
                                  Cummins West 300 HP

                                    Engine Parts List

Item                       Cummins No.                Years Certified
Injector                   3018323—183                   1973—75
Camshaft                   143450                        1977—78
Piston                     3017348                        1981

Turbocharger               3018067                       1980—81

After Cooler               AR 8617                                 (2)
Exhaust Manifo1d           3801222                                 (3)

1.     Federal — All — 1976—78.

2.       Certification data does not give aftercooler part number.

3.     Appears from text to be 1980—81 part.        Part numbers not in certification


                             Table III

                           Injection Timing

       OEM Specification                        Rebuilt Engine

No.             HP.             Timing        HP          Timing
021       350—335                 .036        350           .046

069       290—335—300             .036        300           .050
                                              350           .046

101       290—295                 . 0335      300           .050
                                              350           .046

160       350                     .035        350           .046

174       290—335—300             .036        300           .050
                                              350           .046

190       335—290                 . 046       300           «050
                                              350           .046

0204      350                     .045        350           .046
0207      270                     .042        300           .050
                                              350           046

0217      290—270                 , 050       300           .050

                                              350           .046

Document Created: 2005-09-01 12:40:20
Document Modified: 2005-09-01 12:40:20

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