The lever should not return to the idle speed position. Guide To Tuning Up Your Detroit Diesel 71 Series Inline Engine. 1 injector rack control lever first, to establish a guide for adjusting the remaining injector rack control levers. Adjusting Set Screw. Only remove the brake housings necessary to provide access for adjustment.
10) Turn the idle speed adjusting screw until it projects 3/16" from the locknut to permit starting the engine. Detroit 60 series valve adjustment. Turn the push rod and adjust the injector rocker arm until the extended part of the gage will just pass over the top of the injector follower. Neither is any liability assumed for damages resulting from the use of the information contained in this blog post. Turn the outer adjusting screw down until it bottoms lightly on the injector control tube.
Your email address will not be published. By the way, how come you are not out here in OKC to ask your question in person. 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. Securely lock the adjusting screw locknut. Remove the governor high-speed spring retainer cover. 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. § Check option label on valve cover for correct setting. Repeat step 1. through step 5. for the remaining cylinders. Note: The slave piston adjusting screws used in the Series 60 engine brake prior to August 1994 were reset screws. Initial Valve Lash and Injector Height Measurement/Adjustment Period.
Limiting Speed For Your Mechanical Governor Of Your 71 Series Inline Engine. 013" gage will pass freely between the valve stem and the valve bridge adjusting screw (spring-loaded bridge) or between the value bridge and rocker arm pallet (unloaded bridge), but the. Fuel Injector Rocker Arm Assembly. Set Injector Height on Cylinder No. Properly positioned injector rack control levers with the engine at full load will result in the following: Speed control lever at maximum speed position. Injection timing, also called spill timing, is the moment when diesel fuel enters the cylinder during the combustion phase. Adjust Buffer Screw. Repeat steps thru until all injectors and valves have been set. Check the gap between the low-speed spring cap and the high-speed spring plunger with a feeler gage. Position the remaining injector rack control levers as outlined in steps 7 and 8. 2 injector rack adjusting screw until both No. Note: Slave piston clearance settings for the different engine models are not the same.
008" feeler gage will pass freely between the end of the valve stem and the rocker arm and the. Start and drive the vehicle to verify proper Jake Brake® performance. With the engine running at normal operating temperature, back out the buffer screw to avoid contact with the differential lever. If the rack does not return to its original position, it is too loose. 1 injector control lever down until a step up in effort is noted. Serious engine damage may occur from improper lash setting. FUEL INJECTOR HEIGHTS Models: §. Likewise, injector height should be properly maintained. The fuel injector height is measured using the required Injector Height Gage as listed in Table "Checking Tolerance Chart". To be sure the control lever is properly adjusted, the following check should performed. Loosen the booster spring retaining nut on the speed control lever. Reset screws are not to be dissembled in the field. 7) To adjust the remaining injector rack control levers, remove the clevis pin from the fuel rod and the injector control tube lever.
This permits closing the low-speed gap without bending the fuel rods or causing the yield mechanism springs to yield or stretch. The exhaust valves on the cylinder to be adjusted must be in the closed position (rocker arm loose). Proper settings and techniques of adjusting the intake, exhaust, Jake brakes and injectors to keep your engine running smoothly. Note: Ensure the height gage seats on the machined surface with the tip in the pilot hole. Feeler gage between the tip of the valve stem and the valve button at the end of the rocker arm. After the exhaust valve clearance has been adjusted, time the fuel injectors as follows. Exhaust Valve Adjustment. Variable Speed Mechanical Governor Injector Rack Control Adjustment. "Jake Brake® Models and Slave Piston Settings") can be inserted between the solid side of the slave piston bridge assembly and the exhaust valve. The rack should tilt downward and when the pressure of the screwdriver is released, the control rack should "spring" back upward. He recommends doing them every 50 to 60 thousand miles but of course he wants the work. FUEL INJECTOR HEIGHTS Models: 6067EKXX, 606XBKXX, 606XMKXX, 606XLKXX, 606XHKXX, 606XFKXX (1998 & 1999 DDEC IV). Loosen the lock nut and turn the idle speed adjusting screw until the engine is operating at approximately 15rpm below the recommended idle speed.
Adjust the throttle booster spring (variable governor only). The position of the injector control rack levers must be correctly set in relation to the governor. This is often an overlooked task for proper engine maintenance; however, neglecting your valves could lead to a lot of unwanted hassles like loss of power and decreased fuel efficiency. Movement of the speed control lever is to take-up the clearance in the governor linkage.
FUEL INJECTOR HEIGHTS Models: 6067GT40, 6067WT40, 6067WU40, 6067GU40, 6063WU00, 6063GU00, 6067WU60, 6067GU60, 6067GU91 (All DDEC I and DDEC II / 1986 - 1993). Move the speed control lever from the idle speed position to the maximum speed position. 5 of your service manual for adjustment of the Belleville spring. Valve Adjustments For Your 71 Series Engine. Exhaust from a diesel engine can be harmful to the environment and human health. 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!
Disconnect any linkage attached to the stop lever. The objective is to adjust all six injectors to the same feel. 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. Recheck the clearance at this time if the adjustment is correc the. The exhaust valve bridges must be adjusted and the adjustment screws locked securely at the time the cylinder head is installed on the engine. Connec the linkage to the governor levers. Hold the injector control racks in the full-fuel position by means of the lever on the end of the control tube, and proceed as follows. 2 injector rack control lever and tighten the outer adjusting screw. No patent liability is assumed with respect to the use of information contained in this blog post. 6067HK45, 6067HK60 — 14L U. S. — 2000. He found a loose connection on the Jake brake wire inside the valve cover which he repaired and the fan bearing about to go as well so Marathon is changing that.
To time an injector properly the injector follower must be adjusted to a definite height in relation to the injector body. Fuel Injector Follower. 5 Removal and Cleaning of Three-piece Rocker Cover" for three-piece rocker cover. All of the injectors can be timed in firing order sequence during one full revolution of the crankshaft. For "TT" engines, refer to section 14. Note: Effective with all 1991 model year engines, a change was made to the exhaust valve material which requires a different exhaust valve lash setting.
The setting is sufficiently tight if the injector returns to its original position. Keeping a close eye on the valve lash can alert you to a problem before it leads to hefty repair costs for your diesel engine and a lot of unplanned downtime. Maintaining normal engine operating temperature is particularly important when making the hot engine exhaust valve clearance adjustment. To correct this condition, back off the inner adjusting screw slightly and tighten the outer adjusting screw slightly. Adjusting the starting aid screw to obtain the required setting between the shoulder on the injector rack clevis and the injector body. Hold the speed control lever in the maximum speed position and, using a screwdriver, press downward on the injector control rack.
Brian, Thanks for the link. Adjust the push rod to obtain a smooth pull on the feeler gage. A number of problems could occur that will hinder your truck's performance and potentially leave you with more repairs to address. If it does not reduce the booster spring tension. If a stop lever is provided, secure it in the stop position. View Full Version: When to adjust valve lash on Series 60. 9 Installation of Two-Piece and Three-Piece Rocker Covers" for two and three piece rocker covers. 016" feeler gage (plus or minus 0. Nut driver or socket set. This will place the No.
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