Series 60 – Section 13.2 Valve Lash, Injector Height (Timing) And Jake Brake® Lash Adjustments | Detroit Diesel Engine Troubleshooting

Thursday, 11 July 2024

2 adjusting screw counterclockwise slightly until the No. The injector is now adjusted. A couple years ago, I took my previous bus to Detroit Diesel to get the valves adjusted.

However, if a cylinder head, governor, or injectors have been replaced or overhauled, then certain preliminary adjustments are required before the engine is started. This will result in a step up in effort required to move the stop lever to the end of its travel. Detroit 60 series valve adjustment. Hold in that position with light finger pressure. Engine valves regulate, control and direct the proper amount of air and fuel inside the engine's combustion chamber for ignition to occur. If the lash clearance is too great, it will affect the engine's airflow and will eventually lead to valve damage.

Place the small end of the injector timing gage in the hole provided in the top of the injector body with the flat of the gage towards the injector follower. Feeler gage see Figure. Exhaust Valve Adjustment. Note: Wait at least 30 seconds for oil to be purged from the J-Lash adjusting screw. Variable Speed Mechanical Governor Injector Rack Control Adjustment. Properly positioned injector rack control levers with the engine at full load will result in the following: Speed control lever at maximum speed position. We're currently looking as several 1999 XLV's and 2002 to 2003 XLII's. Remove the two bolts and withdraw the variable speed spring housing and the variable speed spring plunger from inside the spring housing.

The type of governor used depends on the engine applications. All instructions, diagrams, videos have been checked for accuracy and ease of application; however success and safety in working with tools depend to a great extent upon individual accuracy, skill, and caution. Recheck the gap with the engine operating between 1100 and 1300 rpm. If necessary, adjust the push rod. After completing the adjustment, hold the starting aid screw and tighten the locknut. Maintaining normal engine operating temperature is particularly important when making the hot engine exhaust valve clearance adjustment. Nor can they assume responsibility for any damages to property or injury to persons occasioned from the procedures. If unsure of the adjustment, repeat step 1 and step 4. With the idle speed properly set, adjust the buffer screw as follows: - With the engine running at normal operating temperature, turn the buffer screw in so it contacts the differential lever as lightly as possible and still eliminates engine roll.

Should I attempt a diesel engine valve adjustment myself? Step 1: ( step title). Minor adjustments to the valve and injector operating mechanism, gover, etc should only be required periodically to compensate for normal wear and tear on parts. Failure to use the proper adjustment procedure will result in poor engine brake performance, serious engine damage, or both. FUEL INJECTOR HEIGHTS Models: 6067GT40, 6067WT40, 6067WU40, 6067GU40, 6063WU00, 6063GU00, 6067WU60, 6067GU60, 6067GU91 (All DDEC I and DDEC II / 1986 - 1993). This will place the No. Remove the governor high-speed spring retainer cover. 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!

After the adjustments are completed, reconnect and adjust the supplementary governing device. What is the Peterbilt Red Oval Certified Pre-Owned Truck Program? Check and adjust the remaining exhaust valves in the same manner as outlined above. View Full Version: When to adjust valve lash on Series 60. Adjusting Leveling Screw. With the engine running at normal operating temperature, back out the buffer screw to avoid contact with the differential lever. If you only knew what you will learn after you buy a Bus before you Buy your Bus you would understand the importance of attending " A Bus Meeting " Come on in! Note: If a supplementary governing device such as a throttle delay mechanism is used, it must be disconnected prior to the tune-up. 2 injector control lever. Rocker Arm Adjusting Screw and Locknut. If the rack does not return to its original position, it is too loose. The tech doing the adjustment stated that half the valves were too tight and that seemed to be the trend from the factory. Stop engine rotation at the time of valve overlap. In this article we cover a basic tune up for a Detroit Diesel 71 Series inline engine.

Refer to the General Specifications at the front of your service manual for the engine firing order. Recheck the maximum no-load speed. To correctly set injector and valves. Allen Wrench (3/16"). Turn the idle speed adjusting screw until ½" of the threads (12-14 threads) project from the locknut when the nut is against the high speed plunger. 5 of your service manual for adjustment of the Belleville spring. Injector lobe travel on Cylinder No. Fuel Injector Timing For Your 71 Series Inline Engine. 10-04-2009, 06:55 PM. Why You Need a Valve Adjustment for Your Diesel Engine. Injector racks adjusted too tight, not allowing the speed control lever to reach the end of its travel. The objective is to adjust all six injectors to the same feel.

There are no reviews yet. If No 1 does not "spring" back upward, turn the No. Governor low-speed gap closed. We just need to settle on a coach. Turn the leveling screw clockwise until a light drag is felt on the feeler gage. XL Coaches also require dismantling of the bedroom or closet area. Parts Required ( if applicable). 9) Connect the fuel rod to the injector control tube lever. 279 mm) feeler gage is used for intake valves. One Screw and Locknut Assembly. Move the speed control lever from the idle speed position to the maximum speed position. Call 888-642-6460 now. Turn the inner adjusting screw of the No. Fuel Injector Height Adjustment.

We look forward to attending one of the "bus meetings". Making sure your valves are properly calibrated is important for proper engine performance. Variable speed mechanical. Nut driver or socket set. Your 71 series inline engine has no scheduled interval for performing an engine tune-up. A number of problems could occur that will hinder your truck's performance and potentially leave you with more repairs to address. Torque the locknut to 41 - 47 N·m (30 - 35 lb·ft) and remove the feeler gage. Loosen all the inner and outer adjusting screws. 60" clearance between the washers and the retainer nut.

Place the speed control lever in the FULL FUEL position. Use tool J–45002 w/101J cam. NOTICE: Failure to measure valve clearances and injector heights at the required initial period and make necessary adjustments may result in gradual degrading of engine performance and reduced fuel combustion efficiency. Exhaust Valve Spring. The D. W. -L. S. stamped name plate denotes a double-weight limiting speed governor. Exhaust valves on the cylinder must be in the closed position (rocker arm roller should be on the base circle of the camshaft). Note: Remove the "C" clamp from the fuel rod on units equipped with a yield link. Install the variable speed spring housing and recheck the maximum no-load speed. If you rotate the engine beyond this point you will have to bar the engine over in the opposite direction at least 1/4 turn and then bar the engine over in the direction of rotation until maximum injector roller lift is obtained.