Series 60 – Section 13.2 Valve Lash, Injector Height (Timing) And Jake Brake® Lash Adjustments | Detroit Diesel Engine Troubleshooting
If it does not reduce the booster spring tension. Bar the engine in the direction of rotation and observe the intake and exhaust valve rollers at any cylinder that is close to TDC (top dead center). Detroit 60 series valve adjustments. If the engine is allowed to cool before setting any of the valves, the clearance, when running at full load may become insufficient. The coach has less than 65K miles but we decided it would be better to have Marathon take up the closet floor now, before we put everything in it, rather than have to unload everything later. Clean and remove the valve rocker cover, the governor cover and lever assembly.
Connec the linkage to the governor levers. Use new rocker cover gaskets after the tune up is completed. 008" feeler gage will pass freely between the end of the valve stem and the rocker arm and the. Between the solid side of the bridge (the side without the leveling screw) and the exhaust rocker arm adjusting screw. The valve mechanism (push rod, lifter, and rocker arm assembly) is adjusted so that the lash has the proper clearance necessary to regulate the opening and closing of the valve. 001" shim added the operating speed will increase approximately 1 rpm. To time an injector properly the injector follower must be adjusted to a definite height in relation to the injector body. The valve lash is also the only way for the valves to pass heat into the cylinder head. With the engine at 100 degrees fahrenheit (38 degrees celsius) or less, check the valve clearance. The recommended idle speed is 500-600rpm but may vary with the engine application. One Screw and Locknut Assembly. When you adjust the timing, you can alter when the engine injects the fuel, therefore changing when combustion occurs. Recheck lash settings. 2 injector rack adjusting screw until both No.
Refer to information listed in Table "Jake Brake® Models and Slave Piston Settings" for the correct slave piston adjustment specification. 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. 6067LK28, 6067LK45, 6067LK60 — 11. Set the pedestal of the dial indicator on the top of the injector cam roller. EXHAUST VALVE CLEARANCE - * "H" Models: 6062HKXX, 6062TKXX (2000 - 2003). EXHAUST VALVE CLEARANCE - * "H" Models: 606XWUXX, 606XGUXX, 606XXKXX, (1991 - 1999 All DDEC IV, III and later DDEC II). "Valve Lash and N3 Injector Setting Adjustment Sequence". Buy 23532981 | Fuel Pump For Detroit S50 | S60 | 11. Return the speed control lever to the idle speed position.
Adjustments must be made with the engine stopped and cold with the oil temperature at 60°C (140°F) or below. Adjust Booster Spring. Governor shims are available in 0. Valve Adjustments For Your 71 Series Engine. Governor low-speed gap closed. There are a lot of Series 60 owners here that are busy walking their dogs, recovering from a day of blinging out their coaches, or just well - sleepy! Hold the lever in that position with light finger pressure and proceed as follows: Two screw assembly – Turn the inner adjusting screw on the No. High speed spring plunger is within 0. The best method of determining the engine speed is with an accurate tachometer. On governors without the starting aid screw, hold the gap adjusting screw and tighten the locknut. My previous bus was a 93 Marathon with an 8V92, but the same logic is applied to the series 60 engine. Check The Exhaust Valve Clearance Adjustment. No need to answer that question.
Series 60 Service Manual - 6SE483|. Check the gap between the low-speed spring cap and the high-speed spring plunger with a feeler gage. Valve Lash, Injector Height (Timing) and Jake Brake® Lash Adjustments. Loosen the locknuts on the eyebolt at the opposite end of the spring. MODEL NUMBER/DISPLACEMENT/MODEL YEAR. The injector is now adjusted. And tighten the locknut to 41-47 N·m (30-35 lb·ft). NOTE: The above step should result in placing the governor linkage and control tube assembly in the same position that they will attain while the engine is running at full load.
004") will pass between the valve stem and the rocker arm bridge, the valve clearance is satisfactory. The exhaust valves are adjusted the same way as the intake valves, except use a 0. ) Adjust the push rod to obtain a smooth pull on the feeler gage. Power-Lash® is a registered trademark of Jacobs Vehicle Systems™. 11-08-2009, 11:25 AM. 8 Installation of One-Piece Rocker Cover" for a one-piece rocker cover and refer to "1. The fuel injector height is measured using the required Injector Height Gage as listed in Table "Checking Tolerance Chart". A single-weight variable speed governor name plate is stamped S. -V. S. Normally, when performing a tune-up on an engine in service, it is only necessary to check various adjustments for a possible change in settings.
Initial Valve Lash and Injector Height Measurement/Adjustment Period. Stop the engine and install the fuel rod between the differential level and the control tube lever. 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. The exhaust valve bridge balance should be checked when a general adjustment is performed. After each set of intake and exhaust valves is adjusted, adjust the corresponding injector listed in Table "Valve Lash and Injector Height Adjustment Sequence". After the bridges are balanced, adjust the valve clearance at the push rods only.
Note: If a wrench is used on the crankshaft bolt at the front of the engine, do not turn the crankshaft in a left-hand direction of rotation or the bolt may be loosened. 1 injector rack control lever down until a slight movement of the control tube is observed or a step-up in effort is noted. This is the valve overlap period. On engines equipped with a Jake Brake®, move the handle on the injector height gage to the alternate position, 90 degrees to the shank. If the rack does not return to its original position, it is too loose.
If you are in need of a value adjustment procedure, visit Allstate Peterbilt's service department. Rocker Arm Adjusting Screw and Locknut. 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. You should have your valve lash inspected at manufacturers recommended intervals. Maintaining normal engine operating temperature is particularly important when making the hot engine exhaust valve clearance adjustment. This injector can now be set using this procedure: - Loosen the locknut on the adjusting screw at least two full turns. Hold the screw and tighten the locknut to hold the adjustment. With a hand tachometer, determine the maximum no-load speed of the engine, then make the adjustments if required: - Disconnect the booster. This adjustment lowers the tension of the low-speed spring so it can easily be compressed. A couple years ago, I took my previous bus to Detroit Diesel to get the valves adjusted. Note: On "TT" engines, back out the Belleville spring retainer nut until there is approximately 0. Your 71 series inline engine has no scheduled interval for performing an engine tune-up. Set Injector Height on Cylinder No. Do not back out the adjusting screw more than required to obtain a light drag on the feeler gage.
Check the injector rack clevis-to-body clearance after performing the following: - Position the stop lever in the run position. Back out the external starting aid screw. Turn clockwise or counterclockwise the No. XL Coaches also require dismantling of the bedroom or closet area. ‡ XX Any character in these positions, set to the adjacent column. What is a valve adjustment? Adjust Governor Gap. 5 of your service manual for adjustment of the Belleville spring. The recommended torque of the adjusting screws is 24-36 lb-in (3-4 Nm).