Adjust Injector on Cylinder No. Why You Need a Valve Adjustment for Your Diesel Engine. When the starting aid screw is properly adjusted, the gage should have a small clearance of 1/64" in the space along the injector rack shaft between the rack clevis and the injector body.
The mechanical governor is identified by the plate attached to the governor housing. Loosen the fuel modulator lever ("U" bolt) and move the modulator lever along the injector control tube to avoid contact with the modulator cam or the adjacent cylinder head stud nut. Check the adjustment and, if necessary, readjust the push rod. Detroit 60 series valve adjustments. Move the speed control lever from the idle speed position to the maximum speed position.
The setting is too tight if when moving the stop lever from the stop to the RUN position, the injector rack becomes tight before the stop lever reaches the end of its travel as determined by the stop under the governor cover. Loosen the fuel injector rocker arm locknut and turn the adjusting set screw until the extended part (flag) of the gage will just pass over the top of the injector follower. 1 injector rack control lever first, to establish a guide for adjusting the remaining injector rack control levers. 11) On current turbocharged engines, adjust the external starting aid screw as follows: - With the engine stopped, place the governor stop lever in the run position and the speed control lever in the idle speed position. NOTE: If the maximum speed no-load speed is raised or lowered more than 50 rpm by the installation or removal of the governor shims, the governor gap should be rechecked. Adjusting the starting aid screw to obtain the required setting between the shoulder on the injector rack clevis and the injector body. Stop the engine and install the fuel rod between the differential level and the control tube lever. FUEL INJECTOR HEIGHTS Models: 6067TKXX, 606XPKXX, 606XGKXX (1997-98 DDEC IV and later 1997 DDEC III). Buy 23532981 | Fuel Pump For Detroit S50 | S60 | 11.
You might be able to go to Detroit Diesel's web site and check their information database. Disconnect any linkage attached to the stop lever. Note: This is a change from the original recommendation, which required checking and (if necessary) adjusting valve lash and injector heights at 190, 000 km (120, 000 miles). Back out the bridge leveling screw in the slave piston assembly until the end of the screw is beneath the surface of the bridge in the slave piston assembly. 2251 to 2450 rpm||0||Amount required to get necessary speed. A valve adjustment (sometimes also called an overhead) is vital to the health of your diesel engine to ensure proper combustion. To correctly set injector and valves. Nut driver or socket set. Back the adjusting screw off 3/4 of a turn 0. After completing the adjustment, hold the starting aid screw and tighten the locknut.
Hold in that position with light finger pressure. Do not back out the adjusting screw more than required to obtain a light drag on the feeler gage. Intake Valve Adjustment. Note: Once the engine brake has been run, you will not be able to check the engine brake adjustments for engines using J-Lash™ adjusting screws. Bridge Leveling Screw Locknut. Slave Piston Adjustment (Jake Brake® Lash). The recommended idle speed is 500-600rpm but may vary with the engine application. Variable Speed Mechanical Governor Injector Rack Control Adjustment. Install the fuel rod between the governor and injector control tube lever. 1 injector rack to be sure that it has remained snug on the ball end of the rack control lever while positioning the No 2. Refer to your service manual and the General Specifications section at the front of the manual for engine firing order. High speed spring plunger is within 0.
Loosen all of the inner and outer injector rack control lever adjusting screws or adjusting screws and locknuts. Hold the bolt and tighten the locknut. The gap should be 0. Buy 5234699K | Complete O-ring Kit For Detroit S50 | S60 | 11. 004") will pass between the valve stem and the rocker arm bridge, the valve clearance is satisfactory.
If it does not reduce the booster spring tension. Repeat steps thru until all injectors and valves have been set. It had almost 150K miles on it at that time. I'm just surprised that none of the coach owners that I have talked too were aware of the need to adjust the valves at all. Securely lock the adjusting screw locknut. Foreign material in the pilot hole or on the machined surface may prevent accurate setting of the injector height. With the engine at normal operating temperature and with the buffer screw back out to avoid contact with the differential lever, turn the idle speed adjusting screw until the engine is operating at approximately 15 rpm below the recommended idle speed. I went ahead and had Pacific Power in Corborg adjust the valves. The maximum no-load speed on engines equipped with variable speed governors must not be less than 125 rpm or more than 150 rpm above the recommended full load speed. Do not disturb the exhaust valve bridge adjusting screw.
However if the governor has been reconditioned or replaced, and to ensure the engine speed will not exceed the recommended no-load speed as given on the option plate, set the maximum no-load speed as follows: - Loosen the locknut and back off the high speed spring retainer approximately 5 turns. The exhaust valve bridges must be adjusted and the adjustment screws locked securely at the time the cylinder head is installed on the engine. Hold the speed control lever in the maximum speed position and, using a screwdriver, press downward on the injector control rack. To correct this condition with the One Screw and Locknut Assembly loosen the locknut and turn the adjusting screw counter clockwise a slight amount and retighten the locknut. Two Screw Assembly: - Turn down the inner adjusting screw of the No. With the engine stopped, the governor gap may be set as follows: - Remove the governor cover. Recheck the clearance at this time if the adjustment is correc the.
On governors without the starting aid screw, hold the gap adjusting screw and tighten the locknut. 279 mm) feeler gage is used for intake valves. None of them have ever had the valves adjusted and none of the owners were aware of any valve adjustment needed either now or in the future. My previous bus was a 93 Marathon with an 8V92, but the same logic is applied to the series 60 engine. With a hand tachometer, determine the maximum no-load speed of the engine, then make the adjustments if required: - Disconnect the booster. Stop engine rotation and note which cylinder this is, and follow the sequence listed in Table. We just need to settle on a coach. Makes me wonder what other maintenance items had not taken care of. 1 injector has become loose, back off slightly the inner adjusting screw on the No. Rocker Arm Adjusting Screw and Locknut. The lever should not return to the idle speed position. Note: Current limiting speed governors used in turbocharged engines include a starting aid screw threaded into a boss on the governor housing. With the maximum no-load speed properly adjusted, adjust the idle speed as follows: - Remove the spring housing to uncover the idle speed adjusting screw. Maintaining normal engine operating temperature is particularly important when making the hot engine exhaust valve clearance adjustment.
Adjust the valves and set the fuel injector heights as follows: - Disconnect starting power for engine. The needle of the dial indicator will stop moving indicating maximum lift. Reinsert the feeler gage to ensure that the adjustment did not change when the locknut was tightened. Exhaust valves on the cylinder must be in the closed position (rocker arm roller should be on the base circle of the camshaft). Estimated Time: ( if applicable) 1 1/2 hours. Guide To Tuning Up Your Detroit Diesel 71 Series Inline Engine.