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ASTM D – 18 Standard Test Method for Cetane Number of Diesel Fuel Oil

D — 05 close and open the valve a few times to remove any entrained air from the aastm before finally closing the drain valve. Free Length rotator type Handwheel Assembly: ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

Wrench tighten the large handwheel lock nut and recheck that the variable compression plug is properly positioned and the handwheel reading is in accordance with the value in Table 1.

Calculation of Cetane Number The variable compression plug is positioned by the screw action of the handwheel and the relative location of the plug is indicated by an indexed vernier scale. The selected fuel is delivered to the fuel pump inlet and fills the fuel sump or e613. ING notice on the unit panel indicating repairs are in process and that no attempt is to be made to start the engine.

NOTE 1—Experience has shown s613 if handwheel readings are taken when the fuel tank levels of samples and reference fuels are similar, more consistent results are obtained. Except for electromechanical pickups, use of ultrasonic bath equipment has been demonstrated to be effective and heating of some cleaning solutions can also be beneficial.

In the power off condition, a heavy spring pulls the solenoid shaft, the connecting linkage ast the fuel control rack to a zero delivery position.

Changing handwheel setting changes the ignition delay period. Flow rate measurement must then be started almost immediately because the engine will be drawing fuel from the buret and the level in the buret will be falling.

Do not touch the critical lapped surfaces with bare fingers because body asgm can cause undesirable etching. Flush lubricate the bearings if the unit is equipped with field lubrication fittings. Free Diameter after Compression 1. Check and adjust the thermal switch set point as required. Measure with the flywheel at rest and then with the flywheel lifted using an appropriate v613, if the difference in the measurements exceeds 0.


See Appendix X3 for handwheel assembly reworking instructions. Precision and Bias Part numbers are dependent on the three-phase electrical service voltage and frequency available at the site of unit installation. Replacement requires special tools. Install atsm cylinder over the piston so that it is seated on the cylinder base gaskets. Calibration shall be verified in accordance with Practice E D — 05 positioned over that valve tappet.

Valve Seat Inserts, Intake and Exhaust: Add sufficient engine crankcase lubricating oil through the top hole to cause the level to rise to the height of the side opening. This setting is made at the factory and there is no provision for field adjustment. We are a non-profit group that run this website to share documents. The final flow rate measurement shall be We need your help to maintenance this website. Replace the cylinder if the internal diameter at the area of maximum wear is more than 0.

The calibration marks on the buret are in 1 mL increments so that fuel flow rate is easily measured by noting the time required for engine consumption to lower the buret fuel level by a specific number of mL.

The system should then be flushed with clean hot water before recharging with rust inhibited coolant water.

ASTM D – 01 Standard Test Method for Cetane Number of Diesel Fuel Oil

It conducts regular monthly exchange sample analyses to generate precision data for this engine test standard and determines the CNARV of reference materials used by all laboratories. See Annex A4 for procedural detail. A superscript epsilon e indicates an editorial change since the last revision or reapproval. To prevent leakage of combustion gases, this plug, which has no seals or rings, is expanded by action of the locking wheel which is connected to a drawbolt that exerts pressure on a dished and split washer inserted in the plug causing it to expand and clamp the plug in the bore.


Warning—In addition to other precautions, read the compression pressure gage in whatever position it faces without twisting the gage and hose which can distort the readings. Analyzed graphically, the respective sample standard deviations were plotted versus cetane number.

A water manometer may be substituted. A typical spray pattern is illustrated in Fig. Valve Guides, Intake and Exhaust: Warning—Hand tightening of the locking wheel should be adequate if the handwheel mechanism is in proper working order.

ASTM D613 – Cetane Number

Your comments will receive careful consideration at a meeting of the responsible technical committee 1, which you may attend. Balancing Shaft Journal Diameter 1. Typically this inspection could be part of a top overhaul.

If the points do not fit an easily defined smooth curve, the injector nozzle is probably suspect and may require further cleaning maintenance or replacement. Critical Equipment is specified to include the following major items: When the level rises appreciably, the sump should be drained and a fresh charge of oil added. Any cetane number ending in exactly 5 in the second decimal place shall be rounded to the nearest even qstm number; for example, round The lift specification is the same as for the intake valve.

The piston should be used to square the ring in the bore about 1 in. Use of a ring compressor tool over the piston rings is advisable despite the cylinder chamfer.

The fuel switching shall be as illustrated in Fig. Adjust the fuel injection timing micrometer to achieve axtm specified injection advance degrees see Fig. Remove the machine bolt which connects the fuel rack to the safety shutoff solenoid and check that the rack is forced forward against the fuel flow-rate micrometer which should be in a typical operating position.