Page 9 Section I - Introduction Symbols Used in this Manual Page i-5 Symbols Used in this Manual The following group of symbols has been used in this manual to help communicate the intent of the instructions. When one of the symbols appears, it conveys the meaning defined below. Page 13 Section I - Introduction Illustrations Page i-9 Illustrations The illustrations used in this manual are intended to give an example of how to perform the action or the repair being described. Many of the illustrations are common and will not look exactly like the engine or the parts used in your application.
Page 14 Control Parts List; this listing identifies the specific parts that must be in- stalled on the engine to meet agency certification.
Cummins Sealant: This is a one part Room Temperature Vulcanizing RTV silicone rubber, adhe- sive and sealant material having high heat and oil resistance, and low com- pression set.
Aeroshell No. Cummins Engine Company, Inc. Page Engine Identification The engine dataplate provides the model identification and other important information about the engine. Have the following engine data available when commu- nicating with a Cummins Authorized Repair Location. The information on the dataplate is mandatory when sourcing service parts: 1. Page 17 Section I - Introduction Engine Diagrams Page i Engine Diagrams The following drawings contain information about engine components, filter locations, drain points, and access locations for instrumentation and engine controls.
The information and configuration of components shown in these drawings are of a general nature. Some component locations will vary depending on applications and installations. Experience has shown that the best results can be obtained using a cleaner that can be heated to 90 to 95 degrees Celsius [ to degrees Fahrenheit].
The use of these tools is shown in the appropriate procedure. These tools can be purchased from your local Cummins Authorized Repair Location. Use to pull or install the front crankshaft oil seal. Tool Description Tool Illustration Connecting Rod Guide Pins Guide connecting rods over crankshaft during removal or in- stallation of connecting rods. The differences between engine models due to the application, the optional equipment on an engine, and the year an engine was built are included in the instructions.
Omit the steps that do not apply to the engine being rebuilt. Install the engine on two engine support stands, Part No. Remove the drain plug and the copper washer. Check the copper washer for wear. Drain the oil. If the drain plug is installed again, tighten the plug to the specified torque. Remove the tube support bracket capscrew and the bracket.
Remove the tube and the hose from the engine. Turbocharger - Removal Remove the oil supply and the oil drain tubes from the turbocharger. Remove two capscrews, and install two guide studs. Warning: Because this assembly weighs more than 23 kg [50 lbs], two people or a hoist will be required to lift the exhaust manifold assembly to avoid personal injury.
Remove the alternator to alternator support bracket, nut, washer, capscrew, and the alternator. Alternator Mounting Bracket - Re- moval Remove the three alternator mounting bracket capscrews and the mounting bracket. Page Dipstick Tube And Housing - Removal Engine Disassembly Coolant Inlet Transfer Connection - Removal Page Warning: Because this part weighs more than 23 kg [50 lbs], two people or a hoist will be required to lift the oil cooler assembly to avoid personal injury.
Remove the remaining five capscrews from the oil cooler support, and remove the cooler assembly. Remove the covers, and discard the gaskets. Tighten the capscrews. Page Flywheel - Removal Flywheel - Removal Engine Disassembly Page Adjust the position of the engine so that the remaining mounting holes in the adapter plate 1 and 2 align with the capscrew holes in the cylinder block.
Remove the remaining four flywheel mounting capscrews. Warning: Because this part weighs more than 23 kg [50 lbs], two people or a hoist will be required to lift the flywheel to avoid personal injury. Page Rear Cover - Removal Rear Cover - Removal Engine Disassembly Page On wet-type flywheel housings, remove the o-ring from the rear cover and the 11 rectangular sealing rings from the flywheel housing.
Rear Cover - Removal Remove the capscrews from the rear cover, and remove the cover from the crankshaft flange. Remove the four capscrews that attach the fan hub sup- port 1 bracket to the cylinder block and the brace 2 , and remove the fan hub support bracket.
Remove the four capscrews that attach the thermostat housing to the rocker housing. Remove the thermostat housing from the water transfer tube. Remove the water pump out and in a downward direction to clear the dowel pin. This dowel pin, used only on N14 cylinder blocks, prevents the installation of earlier model water pumps which do not incorporate an internal oil cooler coolant return passage. Plug the supply line to avoid dirt contamination.
Caution: Hold the oil manifold fitting hex with a backup wrench while removing the supply line to avoid damag- ing the manifold. Remove the valve. Remove the two capscrews attaching the mounting plate to the cylinder block and remove the mounting plate.
Although the OEM harness is shown, this will be discon- nected when the engine is out of chassis. Remove the sensor mounting capscrews. Remove the sensor from the engine. Page Accessory Drive - Removal Engine Disassembly Accessory Drive - Removal Page Accessory Drive - Removal Caution: If the accessory drive dowel pin has been in- correctly installed in the accessory drive shaft, the dowel pin must be removed before attempting to remove the accessory drive to prevent damage to the accessory drive bushing.
Page Lubricating Oil Pump - Removal Lubricating Oil Pump Signal Line - Removal Engine Disassembly Page Remove and discard the o-ring from the oil pan flange tube and the rectangular sealing ring from the lubricating oil pump mounting flange. Remove the entire assembly from the engine. Remove the rocker lever covers. The rocker housing cover gaskets can be used again if they are not dam- aged. Be sure to mark them appro- priately so they can be installed in the same location and orientation during the installation procedure.
NOTE: Excessive crosshead wear can result if the cross- heads are not installed in their original locations. Use injector puller, Part No.
Insert the threaded end of the puller into the tapped hole in the STC oil feed lock nut. Remove the gaskets. Do not subject the pass through connectors to impact forces and do not rest the housing on the face with the pass through connectors. Remove the six capscrews and studs from each cam follower housing.
NOTE: Record the position of the studs prior to removal. Accessory Drive Seal - Removal Remove the accessory drive seal. Camshaft - Removal Install four camshaft pilots, Part No. Page 60 Piston and Connecting Rod Assemblies - Removal Engine Disassembly Page Use one hand to slowly rotate and pull the camshaft from the cylinder block and the other hand to balance the camshaft as it is removed. Remove the camshaft thrust washer from the camshaft.
NOTE: Push the rod away from the crankshaft, over the crankshaft rod journal, and push the rod until the piston rings are outside of the top of the cylinder liner. Caution: Do not over expand the piston rings.
Maximum gap at assembly is 1. Use the piston ring expander, Part No. Use both hands to remove the liners. Remove and discard the o-rings and the crevice seals. NOTE: Do not discard the sealing rings which are located under the cylinder liner flange.
Page Crankshaft - Removal Crankshaft - Removal Engine Disassembly Page Use a liquid metal marker to mark the cylinder number on each liner. If the sealing rings were removed, do the following: 1.
Use a tag to mark the cylinder number. Measure in several places and record the thickness of the sealing rings used in each cylinder. ST, to re- move the caps. The service tool must be centered on the main bearing cap.
NOTE: Use a pencil or scribe to mark the bearing shells with the journal number from which they were removed if they are to be used again or if failure analysis is required. Use a hoist and a lifting sling to remove the crankshaft.
Page 67 Engine Assembly Cylinder Block - Installation on the Rebuild Stand Page Install the mounting plate adapter on the rear water header if removed during the cleaning or inspection procedure. Page Crankshaft - Installation Crankshaft - Installation Engine Assembly Page Adjust the position of the cylinder block so that the re- maining mounting holes in the adapter plate 2 and 3 align with the capscrew holes in the cylinder block.
Page 69 Engine Assembly Crankshaft - Installation Page Caution: The upper main bearing shells have a groove and an oil hole to provide crankshaft lubrication. The lower main bearing shells do not.
Both bearings are marked on the back to indicate the location and either standard std. Page 70 Crankshaft - Installation Engine Assembly Page Align the ring dowel groove in the bearings with the count- erbore in the cylinder block, and install the bearings. Both ends of the bearing will be approximately 1. Page 71 Engine Assembly Crankshaft - Installation Page Use a lint free cloth to clean the thrust bearings, the main bearing shells, and the main bearing caps.
NOTE: If used thrust bearings are to be installed, each must be installed in its original location in the engine. The bearing journal numbers must have been marked on the bearing during disassembly. Page 72 Crankshaft - Installation Engine Assembly Page Install the dowel ring in the dowel ring counterbore of the cylinder block.
Install the lower main bearing shells as follows: Use clean Lubriplate or its equivalent to lubricate the bearing shell to the crankshaft journal mating surface. Align the dowel ring groove in the bearing with the dowel ring. Page 73 Engine Assembly Crankshaft - Installation Page The end of the lower main bearing shell opposite the dowel ring must be engaged between the crankshaft and the cylinder block and be seated against the end of the upper bearing shell. NOTE: If installed correctly, the ends of the bearing shells 1 will meet approximately 1.
Page 74 Crankshaft - Installation Engine Assembly Page Caution: The main bearing caps are marked for position 1 on the camshaft side and the cylinder block identi- fication 2 on the exhaust side.
The cylinder block iden- tification number 3 is stamped on the pan rail on the camshaft side of the block. Page 75 Engine Assembly Crankshaft - Installation Page Tighten the main bearing capscrews to the following torque values: 1. Loosen completely. Install a dial indicator to the rear face of the cylinder block.
Put the tip of the gauge against the end of the crankshaft. Push the crankshaft toward the rear of the cylinder block. The end clear- ance specification for a new or reground crankshaft with new thrust bearings is 0. NOTE: Crankshafts that have been reground on the thrust bearing surfaces are marked for oversize thrust bearings on the rear crankshaft counterweight.
Install the crevice seal 1 in the top groove. Install the black o-rings 2 and 3 in the center and the bottom grooves. Protrusion can be checked while the liner is held down by the installation tool. Put a sealing ring into position on the counterbore ledge. Page 80 5. Inspect the cylinder block liner counterbore for burrs.
Remove the burrs, or replace the damaged parts. Install the liner again. Check the liner protrusion again. Page 82 Piston and Connecting Rod Assemblies - Assembly and Installation Engine Assembly Page The piston ring shipping package identifies the location of each piston ring by the part number.
Install the rings in the sequence shown and in the proper orientation. Apply a heavy film of clean 15W oil to the liner. Put the piston and the ring assembly in a container of clean 15W oil. NOTE: The tang of the connecting rod must be toward the camshaft side of the cylinder block.
Page Rear Cover - Installation Engine Assembly Rear Cover - Installation Page Caution: The rod cap alpha-numeric characters must match the alpha-numeric characters on the connecting rod and must be installed with the characters aligned to prevent damage to the connecting rods and the crank- shaft. ST; and use the driver to align the rear cover with the crankshaft.
Install the seal drive in the crankshaft flange and in the bore of the rear cover. Use crankshaft oil seal driver, Part No. ST, to install the oil seal in the rear cover. Flywheel Housing - Installation Caution: If a new flywheel housing is being installed, the dowels must be removed from the cylinder block prior to installing the housing to prevent damage to the Page 88 Flywheel Housing - Installation Engine Assembly Page Bore Alignment - Measurement Caution: The flywheel housing bore and the surface must be in alignment with the crankshaft to prevent possible damage to the engine, the clutch, or the trans- mission.
Page 90 Flywheel Housing - Installation Engine Assembly Page If the alignment is not within specifications and the bore is round, the housing can be shifted. Refer to Section If the alignment is not within specifications and the bore is not round, the housing must be replaced.
Page Flywheel - Installation Flywheel - Installation Engine Assembly Page If the alignment is not within specifications, remove the housing. Check for nicks, burrs, or foreign material be- tween the block and the housing. Check the alignment again. If the alignment is not within specifications, the block or the housing is not machined correctly.
Page 93 Engine Assembly Flywheel - Installation Page Install two t-bolts into the flywheel clutch mounting sur- face. Warning: Because this part weighs more than 23 kg [50 lbs], two people or a hoist will be required to lift the part to avoid personal injury.
If the T. Inspect the flywheel mounting surface for dirt or damage. Inspect the crankshaft for dirt or damage. Page 95 Engine Assembly Flywheel - Installation Page Install the flywheel, and inspect the bore runout again.
Replace the flywheel if the runout does not meet specifications. Face Alignment - Measurement Install the contact tip of the indicator against the flywheel face, as close to the outside diameter as possible, to inspect the face 4 runout. If reusing original cylinder heads, install them in their original position.
Use clean 15W oil to lubricate the cylinder head cap- screws and both sides of the flat washers. Allow the excess oil to drain from the threads. Rotate the capscrew until the mark on the cylinder head is between the next two marks joined by an arc more than one flat and less than two flats.
Remove the camshaft installation pilots. Page Cam Follower Assemblies - Installation Cam Follower Assemblies - Installation Engine Assembly Page Turn the camshaft gear by hand in the opposite direction as far as it will freely move, and read the dial indicator. Backlash Between the Camshaft and the Crankshaft Gears 0. Codes are alphabetic letters that relate to a numerical specification. Advanced timing 1 means the fuel is injected earlier into the cylinder during the compression stroke.
Due to normal parts tolerances, it is necessary to check one cylinder for each cam follower housing. Timing Tool Installation Caution: Pivot the dial indicator stems away from their respective plunger rods before installing the timing fix Page Engine Assembly Injection Timing - General Information Page Align the plunger rod 1 and the injector push rod 3 with each other, and parallel to the plunger rod. NOTE: Tighten the clamp handle 2 after the plunger rod is aligned with the injector push rod.
If both needles do not move in the same direction, rotate the engine one complete revolution in the same direction of rotation. Page Engine Assembly Injection Timing - General Information Page Put the push rod travel dial indicator in the center of the injector push rod plunger. Lower the indicator to within 0. Page Injection Timing - General Information Engine Assembly Page Compare the reading of the injector push rod travel in- dicator to the specification listed for the timing code.
Each 0. Install a new gasket on the accessory drive assembly. Page Accessory Drive - Installation Engine Assembly Page Use a dial indicator to check the backlash between the accessory drive gear and the camshaft gear. Install the tip of the dial indicator against a tooth on the accessory drive gear as shown. Push the accessory drive gear against the accessory drive thrust washer or thrust face. Make sure a new o-ring is present and in place. Use service tool, Part No.
Turn the lubricating oil pump drive gear by hand in the opposite direction as far as it will freely move, and read the dial indicator. Page Engine Assembly Gear Cover - Installation Page Cut off the ends of the gasket even with the cylinder block oil pan mounting flange. Mount a dial indicator on the front face of the crankshaft. Page Engine Assembly Camshaft Bearing Support - Installation Page The clearance between the bearing support thrust face and the camshaft gear must be 0.
After measuring the space between the bearing support and the gear cover flange, add an additional 0. The o-ring will increase in size when in contact with lubri- cating oil. Use vegetable oil to lubricate the o-ring. Lubricate the o-ring with vegetable oil, and install the support bearing into the gear cover. Apply a film of Lubriplate or its equivalent to the accessory drive shaft. Install the plugs B in the front of the No.
Install the two water tube retainer clamps. Install and tighten the retainer clamp capscrews. Lubricate the o-rings with lubricating oil just before installation.
Install the injector and hold down clamp. Twist the injector connector three turns to twist the lead wires. The clearance must be a minimum of 0.
NOTE: The large pocket goes toward the exhaust side. Rocker Lever Shaft Assemblies - Installation Install the exhaust 1 , injector 2 , and intake 3 rocker Page Injector And Valve Adjustment Engine Assembly Injector and Valve Adjustment Page Make sure the push rods are in the cam follower sockets, and align the push rods with the injector and valve rocker lever adjusting screws. Torque Value: 2. Page Injector and Valve Adjustment Engine Assembly Page Select a feeler gauge for the correct valve lash specification.
Valve Lash Specifications Intake Exhaust 0. Page Engine Assembly Injector and Valve Adjustment Page If using the feel method, attempt to insert a feeler gauge that is 0. The valve lash is not correct when a thicker feeler gauge will fit.
NOTE: Both the intake and exhaust valves are closed when both rocker levers are loose and can be moved from side to side. Page Injector and Valve Adjustment Engine Assembly Page Apply thumb pressure to the tool handle to hold the tappet in the maximum upward position. Caution: An overtightened setting on the injector ad- justing screw will produce increased stress on the in- jector train and the camshaft injector lobe which can result in engine damage.
Page Bar Engine correctly. Advance to Advance to Advance to Advance to Advance to Install new C-Brake housing gaskets and the C-Brakes. Remove the guide pins. Install the C-Brake capscrews.
Tighten the capscrews in the sequence shown to the torque value listed below. See the latest N14 parts publi- cation information. Install a dial indicator, Part No. Use the adapter, Part No. Page Jacobs Brake Engine Assembly Rocker Housing Covers - Installation Page Tighten the slave piston adjusting screw until the slave piston contacts the feeler gauge and creates a slight drag. Use the torque wrench adapter, Part No.
ST, to tighten the lock nut. Install the ten capscrews and washers in each cover. Tighten the capscrews in each cover in the sequence shown. Tighten the sensor. Use clean vegetable oil to lubricate the o-ring. Loosely install the lubricating oil transfer tube assembly with the lubricating oil pump mounting flange, new seal- ing ring, new gasket, and the mounting capscrews to the oil pan and lubricating oil pump. Make sure the gasket surfaces of the accessory drive and the air compressor are clean and not damaged.
It is not necessary to time the air compressor on the NT engine. Use a new gasket to install the fuel pump. Install the four fuel pump mounting capscrews. Inspect for paint or grease on the cooling plate. Install the sensor harness amp connector to the elec- tronic control module ECM. Tighten the connector cap- screws to the ECM. Wire tie the harness to the fuel tubing at the rear of the engine. Install a new plastic wire tie, Part No.
Fuel pressure sensing line - 9. Page Vibration Damper - Installation Engine Assembly Page Install the dial indicator on the gear cover as indicated to measure damper eccentricity. Rotate the crankshaft, and record the indicator move- ment. Replace the vibration damper if the eccentricity exceeds 0.
Page Water Pump - Installation Engine Assembly Water Pump - Installation Page Rotate the crankshaft degrees, maintaining the po- sition of the crankshaft either toward the front or the rear in relation to the block.
Record the total indicator motion. Replace the damper if wobble exceeds 0. Pulley misalign- ment must not exceed 0. Inspect and repair or replace the idler pulley or water pump if pulley misalignment exceeds 0.
Apply a non-petroleum based lu- bricant such as soap or vegetable oil to the o-rings on each end of the tube and to the bores in the water pump housing and the thermostat housing cover.
Install the coolant tube to the thermostat housing. Inspect, repair, or replace the fan hub or the fan hub support bracket if pulley misalignment exceeds 0. Remove the capscrews that hold the engine to the adapter plate.
Water Header Covers - Installation Install new water header cover gaskets and the covers. Install a new oil cooler support gasket over the guide studs. Tighten the mount- ing capscrews. Special capscrews with spacers are required for the N14 exhaust manifold. Do not use short capscrews. Page Turbocharger - Installation Engine Assembly Turbocharger - Installation Page Tighten the capscrews in two steps in the sequence shown.
Page Turbocharger - Installation Engine Assembly Page Install a new gasket, oil drain tube, and capscrews. If installing a new turbocharger, install the male union elbow. Torque Value: 4. Open the valve after the run-in. Be sure the engine draincock and oil cooler draincock are closed. ST Loctite Primer T Use to clean the counterbore area and the outside diameter of the repair sleeve.
ST Pipe Sealant Use when installing pipe plugs on engines to stop leaks. Page Cylinder Block - General Information 2. Most of the capscrews used on the N14 engine are U. Drill a 3. Page Dowel Pin - Removal Cylinder Block - Disassembly Cylinder Block Page Remove the straight thread plug and pipe plug from the piston cooling oil passage on the exhaust side of the cylinder block. Remove pipe plugs from the coolant passage on the exhaust side of the cylinder block. Remove the No.
Page Cylinder Block - Cleaning and Inspection Cylinder Block Page Clean the following cylinder block areas: Cylinder liner counterbore ledge and press fit area. Cylinder liner packing ring bore. Cylinder head deck surface. Main bearing saddles and caps. All gasket surfaces. All component mounting surfaces. Clean all oil passages. Use a bottle brush with a long handle. Page Follow the instructions of the manufacturer of the clean- ing tank and the manufacturer of the cleaning solution.
Cover the block to prevent dirt from sticking to the oil. Camshaft Bore - Cleaning Use a fine emery cloth to remove burrs, and clean the bushing bores. ST [4. Put the rings in the No. Use clean 15W oil to lubricate the main bearing cap- screw threads and the flat washers. Hit the cap with a rubber mallet to push it into the correct position.
NOTE: The main bearing caps must not have any side clearance with the block. Page Cylinder Block - Cleaning and Inspection Cylinder Block Page Insert the bar through the centering rings while slowly rotating the bar. The bar must turn easily. If the bar does not turn easily, check to make sure the main bearing caps are installed correctly. Center the checking ring in the bore.
Try to put the feeler gauge between the checking ring and the bore. Rotate the gauge in the bore at both sides of the checking ring. The inside diameter must be completely round within 0. Main Bearing Bore I. Capscrews Torqued to Specification Page Coolant Passage - Inspection NOTE: If the top surface of the block is machined, the ledge depth of the cylinder liner counterbore must be machined.
Page Cylinder Block - Machining Cylinder Block Page Closed end thread repair inserts can be used in conjunc- tion with upper counterbore sleeves 0.
Cylinder blocks with vertical cracks that extend down over the counterbore ledge that can not be machined out using a 0. The coolant passage repair inserts for the N14 cylinder block are available in packages of 50, tool Part No. NOTE: If the reamer extends too far down in the hole, it will hit the radius of the coolant jacket and deflect the drill side- ways, causing the hole to be out of round. Clean the threads with safety solvent, Part No. Allow to dry.
Clean the coolant passage insert with a safety solvent, Part No. Page Cylinder Block Cylinder Block - Machining Page Start the insert with your fingers, and install it approxi- mately half way. Liberally apply the sealing and retaining compound to the upper half of the thread, and finish installing with the installation tool. Tool No. Description Insert Use a chip removing unit to remove reamer chips from the capscrew hole. Set the tap stop collar to the correct height, using the insert to be installed.
Use a chip removing unit to clean the capscrew hole of shavings and debris, and allow to dry. Loosen the jam nut. Remove the cylinder head capscrew and jam nut arrangement. Correct installation will provide 0. Bushing No. To use, mount the bearing on the driver. Place the align- ment pointer against the machined side of the block at the cam follower holes with the end of the rod at the top of the bearing.
The rod must pass through the oil holes in the bushing and into the oil supply drillings in the cylinder block.
Install new o-rings on the straight thread plugs. The o-ring used by Cummins Engine Company, Inc. Lubricate the o-ring with clean 15W oil. Tighten the pipe plug. This will prevent dirt from being trapped in the engine. Abrasives can damage the finish and the pattern and can contaminate the liner. Warning: Wear eye protection. Make sure the wire brush is rated for the RPM being used if the brush is motor driven. Replace the liner if pitting or erosion is greater than one-half the width of the crevice seal groove.
Visually inspect the outside diameter for excessive cor- rosion or pitting. NOTE: Cracks can also be detected by using either mag- netic inspection or the dye method.
Replace the liner if cracks are found in the flange area. Visually inspect the exterior of the liners. Hot steam can cause serious personal injury. Page Inspection If pistons are unacceptable for reuse, do not use the mating piston pins. Cummins recommends replacing pistons and pins in sets.
Visually inspect the piston ring lands and ring grooves for wear. Piston Pin Bore Page Inspection Connecting Rod Assemblies - Cleaning and Inspection Cylinder Block Page Inspection Visually inspect the connecting rod and the cap for fret- ting damage on the mating surfaces.
The rod and the cap must be replaced as an assembly if any fretting damage is visible on either piece. Visually inspect under the capscrew heads for cracks. Measure the capscrew outside diameters. Connecting Rod Capscrew O. Connecting Rod Crankshaft Bore I. Use pliers or locking pliers to remove the damaged ring dowels. Move the dial holder to position the contact points of the indicators on the mandrel in the piston pin bore.
Tighten the bracket to hold the indicators in position. Connecting Rod Length Page Connecting Rod Bearings - Cleaning and Inspection Cylinder Block Page NOTE: If large areas of copper lining are visible in the bear- ings before the engine has accumulated , kilometers [, miles] or 3, hours, inspect the engine for con- tamination from fine dirt particles; Also, the wire brush must be rated for the RPM being used if the brush is motor driven.
Use an emery cloth or a steel wire brush. Outside Pilot Diameter Spun Steel Crankshaft Pulley I. Personal injury can result. ST, and solvent to clean all the oil drillings. Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Visually inspect the crankshaft gear for cracks and broken or chipped teeth. Where the front and the rear crankshaft seals contact the crankshaft, the maximum allowable wear is 0. Crankshaft Main Bearing Journal O.
Crankshaft Thrust Face Width Install the puller jaw and the bridge assembly. Use engine oil to lubricate the puller jackscrew. Page Crankshaft Gear - Replacement Cylinder Block Page Visually inspect the crankshaft gear fit area for burrs or damage. Use a fine crocus cloth to remove the burrs. Inspection Visually inspect the crankshaft gear for cracks and broken or chipped teeth.
Visually inspect the gear and the keyway for nicks or burrs. Crankshaft Gear Fit Area O. Use Lubriplate No. Caution: The timing mark 1 and the part number 2 on the gear must be facing away from the crankshaft after the gear is installed. Bearing shells are identified by steel stamped characters on the back of the bearings to indicate either standard or the amount of oversize. Page 40 oil before handling. Inspection Visually inspect the valve and injector lobes for damage. If the camshaft is damaged, it must be replaced.
Camshaft Bushing Journal O. Measure the camshaft thrust washer. Camshaft Thrust Washer Thickness 2. If you use a heating torch, a new gear must be installed.
Push the shaft from the gear. NOTE: If the camshaft key is marked with an arrow, record the direction the arrow on the key is pointed toward or away from the camshaft for future reference. Camshaft Gear Bore I. Flangeless Caution: If the area of fretting is longer than a 3. Remove the gear from the oven. Caution: The aluminum gasket surface can be easily damaged if caution is not used when removing gasket material.
An oil leak will result. Use a gasket scraper to remove all gasket material. Accessory Drive Seal Bore I. Measure the crankshaft seal bore. Accessory Drive Bushing Bore I. Use gear cover bushing mandrel, Part No.
Use solvent to clean the rear cover. Dry with compressed air. Inspection Inspect the rear cover for cracks or other damage. Measure the rear cover crankshaft seal bore. ST Injector Sleeve Expander Roll and seal the upper portion of the injector sleeve in the cylinder head. Tool Description Tool Illustration Injector Sleeve Holding Tool Hold the injector sleeve in place when rolling the upper portion of the sleeve and testing the cylinder head.
Page Cylinder Head - General Information Cylinder Head Cylinder Head - General Information Page Cylinder Head - General Information The cylinder head group consists of the cylinder head, valves, valve guides, valve springs, stem seals, valve seat inserts, cylinder head capscrews, fuel crossover, collets, spring retainer, crossheads, and the injector sleeves.
The exhaust valves are manufactured from a material that is capable of operating at a higher temperature than the intake valves. Blow out all capscrew holes, fuel passages, and oil passages. Inspection Visually inspect the fuel drillings and the water passages for restrictions or foreign material. Remove any obstructions. Visually inspect the valves and the valve springs for cracks, bent or broken valve stems, broken valve springs, or other damage.
Visually inspect the valves for indications of leakage or burning. Discard the valve collets. Slowly release the pressure on the valve spring. Remove the valve spring retainer. Remove the valve spring s. Remove the valve stem seal. Remove the valves. Install the cylinder head and the parts in a tank of clean- ing solution. Remove the cylinder head and parts from the cleaning tank.
Flatness Per Limit NOTE: Install the valve on the tool with the valve head contacting the tool as shown. If the valve head is even with, or extends beyond the end of the tool, the valve can be reground. Valve Seat Area Width 1. Page Grinding The Valve Seats Cylinder Head Cylinder Head - Rebuild Page Remove the injectors from the cylinder head and check the pattern of the blueing compound in the injector sleeve. The blueing pattern in the injector seating area 1 must be visible degrees around the seating area.
The injector bore seating width 2 must be a minimum of 1. Page Cylinder Head - Rebuild Cylinder Head Page Hold the drive unit in a vertical position, and use an up-and-down movement of Remove the grinder unit from the arbor. For proper operation, high-quality repair and timely maintenance of diesel engines Cummins N14, you should purchase this service manual. Maintenance instruction includes detailed repair manual with full specific information on the technical serve of diesel engines series N14 of Cummins.
Repair and operation manual is a vital tool in the solution of all problems. This information is presented in the format of PDF. Software has a nice and friendly interface, the software works after installing Adobe Reader, which allows you to find the necessary information to the user, as well as to print out individual pages or the entire text as a whole.
At the moment the engines of this family is no longer available, but still a large number of various kinds of vehicles equipped units N At one time it was one of the most popular engines from the manufacturer Cummins.
These mechanisms are used in trucks, trailers, mining equipment and electric power generators. Cummins N14 engines are known for their superior strength and reliability.
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