Diesel Generator Tech

This article mainly introduce how to adjust crosshead, injector and valves of Cummins diesel engine . If you are interested, take some times to read it carefully. Crosshead Adjustment Note: Crosshead adjustment should always be made before attempting to adjust the valves. 1. Loosen the locknut on the crosshead adjusting screw. Turn the adjusting screw out at least one turn. 2. Hold the crosshead down against its mating valve stem. Turn the adjusting screw back in until it touches the valve stem. Hold the adjusting screw in this position and tighten the locknut. 3. Tighten the adjusting screw locknut to 25 to 30 ft-lb [34 to 41 N*m] torque. Note:   When ST-669 Torque Wrench Adapter is used, tighten the locknut to 22 to 26 ft-lb [30 to 35 N*m] torque. 4. Check the clearance between the crosshead and valve spring retainer 1 and 2. Fig. 2–19 with a wire gauge. Tighten must be a minimum of 0.025 inch [0.64 mm] clearance. Fig.2–19. Valve spring retainer to crosshe...

In this article, we mainly talk about how to adjust injector and valve of Cummins diesel engines in a correct way. In addition, the engine temperature of the  generator set  is also required when adjusting the injector and valve.  Note:  At each “C” Maintenance Check, first perform all “A”, and “B” Checks in addition to those following: Adjust Injectors and Valves It is essential that the injectors and valves be in correct adjustment at all times for the engine to operate properly. One controls engine breathing; the other controls fuel delivery to the cylinders. Final operating adjustments must be made using correct values as stated. Cautions:   Be sure the injector and valve set markings, wherever located, are in proper alignment with the indicator mark. Engine Temperatures The following temperature conditions provide the necessary stabilization of engine components to allow for an accurate valve and injector adjustment. Cummins E...

In this article, you will learn how to check Cummins diesel engine coolant. If you are interested, continue reading. Check Engine Coolant Periodic tests of the engine coolant should be made to ensure that the frequency of water filter servicing or concentration of DCA inhibitor is adequate to control corrosion for any specific condition of operation. In cases where “make-up” water must be added frequently, we suggest that a supply of water be treated and added as necessary. The concentration of effective inhibitor dissolved in the coolant can be measured by a Feetguard DCA Coolant Checking Kit Part No. CC2602 M or  Cummins  3165449 which is available from ChongQing Cummins Distributors for this check. Fig.2-12. Fig. 2-12. DCA coolant test kit For the measure method see the instruction manual in the test Kit. Bulk Storage of Make-Up Coolant If make-up coolant is stored in bulk, the following recommendations are provided for mixing and storaging the coolant. 1...

B-Check At each “B” Maintenance Check, perform all “A” Checks in addition to the following. Maintaining a proper “B” maintenance check interval is a very important factor in preserving the integrity of an engine . Lubricating oil contamination is the direct result of engine operation, the load factor involved and the amount of fuel the engine consumes. Note:  If the lubricating oil is drained from the oil pan to make an engine repair, new oil must be used. Do not use oil after it has been drained from the oil pan. Lubricating Oil Change Intervals 1. The recommended oil change interval is determined by the “Chart Method” based on fuel oil consumed and lubricating oil added. See “Chart Method” following. 2. An alternate to the “Chart Method” is 250 hours or 6 months. 3. A second alternate method of determing oil change interval may be established through the use of oil analysis. Refer to “Lubricating Oil Analysis.” Chart Method Advancement in lu...