Detroit 60 Series Valve Adjustment

July 5, 2024, 1:26 pm

Exhaust valves on the cylinder must be in the closed position (rocker arm roller should be on the base circle of the camshaft). Exhaust Valve Spring. Hold the screw and tighten the locknut to hold the adjustment. Recheck the maximum no-load speed.

Remove the fuel rod from the differential lever and the injector control tube lever. Remove the feeler gage. Here is a link to the Series 60 Operators Manual:. We also offer body shop services around the Midwest and a mobile truck service for convenient truck maintenance on the road. Detroit 60 series valve adjustments. 2 injector rack control lever until the injector rack clevis is observed to roll up or an increase in the effort to turn the screwdriver is noted. To be sure of the proper rack adjustment, hold the speed control lever in the maximum speed position and press down on the injector rack with a screwdriver or finger tip and note the "rotating" movement of the injector control rack when speed control lever is in the maximum speed position. Looking forward to taking possession next week. To ensure efficient engine performance and extended valve and injector service life, an initial valve lash and injector height measurement/adjustment requirement has been established. Recheck the gap with the engine operating between 1100 and 1300 rpm.

This is due to oil retained in the J-Lash™ adjusting screw. § Check option label on valve cover for correct setting. 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. FUEL INJECTOR HEIGHTS Models: 6064TKXX, 6063TKXX, 6063EKXX, 606XGKXX, 606XWKXX, 606XSKXX (All DDEC III 1994-1997). Adjusting Slave Piston Screw-Except 790/795. Prospective Prevost Owners. For natural gas applications the valves are adjusted the same way as on the diesel engine, except that a 0. 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. Engine overspeed will result if the injector racks cannot be positioned at no-fuel with governor stop lever. Note: A false fuel rack setting may result if the idle speed adjusting screw is not backed out as noted above.

EXHAUST VALVE CLEARANCE - * "H" Models: 606XWUXX, 606XGUXX, 606XXKXX, (1991 - 1999 All DDEC IV, III and later DDEC II). EXHAUST VALVE CLEARANCE - * "U" Models: 6067GT40, 6067WT40, 6067WU40, 6067GU40, 6063XX00, (1986 - 1990 All DDEC I & Early DDEC II). Remove the height gage. Manually hold the No. If the rack of the No. Adjusting the starting aid screw to obtain the required setting between the shoulder on the injector rack clevis and the injector body.

If it does not reduce the booster spring tension. When is the proper time to adjust the valve lash? You might be able to go to Detroit Diesel's web site and check their information database. Adjust the supplementary governing device if used. The exhaust valves on the cylinder to be adjusted must be in the closed position (rocker arm loose). 1 injector rack control lever down until a slight movement of the control tube is observed or a step-up in effort is noted.

10" and approximately 0. Install all remaining components that were removed for this procedure. Adjust Injector on Cylinder No. Note: For Model 795 applications, skip to step 4. A couple years ago, I took my previous bus to Detroit Diesel to get the valves adjusted. Tighten the outer adjusting screw.

Check the gap, and reset it, if necessary. Recheck the clearance. Torque the locknut to 41 - 47 N·m (30 - 35 lb·ft) and remove the feeler gage. Verify proper injector rack adjustment for both No. To adjust the intake valves, insert a 0. Fuel Injector Height Adjustment. Recheck lash settings.

While some people do their own valve adjustments, there is a lot that can potentially go wrong. "H" valves have a machined identification ring above the valve lock groove. Adjusting Set Screw. Check the injector rack clevis-to-body clearance after performing the following: - Position the stop lever in the run position. James, Welcome to the Forum. Slave Piston Adjustment (Jake Brake® Lash).

Repeat step 1. through step 5. for the remaining cylinders. Do not back out the adjusting screw more than required to obtain a light drag on the feeler gage. Adjust Governor Gap. Note: Current limiting speed governors used in turbocharged engines include a starting aid screw threaded into a boss on the governor housing. Move the speed control lever from the idle speed position to the maximum speed position.

However, if a hot engine adjustment is desired use the following procedure. The following types of governors are used. Adjustments must be made with the engine stopped and cold with the oil temperature at 60°C (140°F) or below. Making sure your valves are properly calibrated is important for proper engine performance. Table 17 in the manual recommends the 60K mile initial valve lash adjustment. If you are in need of a value adjustment procedure, visit Allstate Peterbilt's service department. Remove the governor high-speed spring retainer cover. The exhaust valve bridges must be adjusted and the adjustment screws locked securely at the time the cylinder head is installed on the engine. Disconnect any linkage attached to the stop lever. Variable speed mechanical.

Variable Speed Mechanical Governor Injector Rack Control Adjustment. 6067WK28, 6067WK60 — 11. Governor low-speed gap closed. Remove the engine valve rocker cover as outlined. Nor can they assume responsibility for any damages to property or injury to persons occasioned from the procedures. Power-Lash® is a registered trademark of Jacobs Vehicle Systems™. The setting is sufficiently tight if the injector returns to its original position. To avoid injury from fire, contain and eliminate leaks of flammable fluids as they occur. Back out the buffer screw approximately ⅝" if it has not already been done. 7L | 14L From HD Kits Quality Parts, 2 Yrs Warranty.

Failure to use the proper adjustment procedure will result in poor engine brake performance, serious engine damage, or both. Time the fuel injectors. Note: Slave piston clearance settings for the different engine models are not the same. Early models (pre-1991 models) use 0. Fuel Injector Follower. How to run an overhead on a Detroit engine.

"Valve Lash and N3 Injector Setting Adjustment Sequence". Note: If a supplementary governing device such as a throttle delay mechanism is used, it must be disconnected prior to the tune-up. Since the application of the governor has different characteristics, the tune-up procedure varies accordingly. Should I attempt a diesel engine valve adjustment myself? Check the adjustment and, if necessary, readjust the push rod. 5 Removal and Cleaning of Three-piece Rocker Cover" for three-piece rocker cover. Complete the installation by installing the rocker cover. 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. The recommended torque of the adjusting screws is 24-36 lb-in (3-4 Nm). Stop turning the engine and mount a magnetic base dial indicator so you can monitor the upward lift of travel of that injector lobe. You will burn through fuel quicker.

The injector height settings for Series 60 engines are listed in Table "Checking Tolerance Chart". Adjust the push rod to obtain a smooth pull on the feeler gage.