Harley-Davidson Twin Cam Engines Cam Chain Drive System Installation and removal MANUAL

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Filed Under (Harley Davidson) by admin on 27-03-2012

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Removing the Cam Chain Drive System. NOTES Changing camshafts and cam drives in the 2006-up Harley-Davidson® Twin Cam 88® engines is different than in pervious engines. Procedures require use • of some special tools. Installation should be done by an experienced mechanic with access to factory service manual and required tools. Tighten all fasteners to the correct specifications and in order described. Always use an accurate torque wench. • Incorrect installation can cause engine damage not covered under warranty. CAUTION Failure to install components correctly can result in sudden engine seizure. Engine seizure may result in serous injury to motorcycle operator, passenger, or others. A- Disconnect the battery ground cable to eliminate potential sparks and inadvertently engagement of the starter while working on the motorcycle. B- Remove spark plugs and pushrod cover clips. Collapse the pushrod covers to expose the pushrods. C- Safely elevate and stabilize the rear of the motorcycle. Place the transmission in high gear. Turn the rear wheel to rotate the engine until both lifters and pushrods for either cylinder are at the lowest point on the camshaft (TDC of compression stroke). Both intake and exhaust pushrods for that cylinder will be under pressure from the valve springs and will rotate with light finger pressure. NOTE: 510G camshafts may use stock style non-adjustable pushrods instead of adjustable pushrods. If installing non-adjustable pushrods, disassemble and assemble rocker boxes per H-D® instructions. All other S&S® gear driven cams require installing adjustable pushrods. As a time-saving measure, the stock pushrods can be removed with bolt cutters. Be sure to head caution and warnings of these instructions. D- Cut the pushrods for the cylinder that is at TDC with the bolt cutter and remove the pushrod covers from the engine. Rotate the engine to place the pushrods for the other cylinder at their lowest point. Cut and remove the remaining pushrods. WARNING CAUTION Cutting pushrods with a saw or cutoff wheel may result in debris entering the engine, causing engine damage not covered under warranty. WARNING Cutting pushrods without releasing spring pressure, by rotating the engine until tappets are at the lowest point of travel can result in bodily injury. E- Remove the pushrod covers and lifters form the crankcase. F- Remove engine cam cover and gasket. Secure lifers with a tool made from a large binder clip

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Honda XR600/ XR650L Camshaft Installation and removal Instructions

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Filed Under (Honda) by admin on 05-12-2011

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Remove the tappet covers. Remove the crankshaft cap and timing hole cap on the left engine case cover. Remove the spark plug. Rotate the engine in a counter clockwise direction. Position the engine at true top dead center (TDC) using the mark on the flywheel. True top dead center occurs when both the intake and exhaust valve are closed when the piston is at TDC. This is technically the end of the compression stroke and the beginning of the power stroke. The “artificial” TDC is during the overlap when both the intake and exhaust valves would be open. Since the rocker arms are located in the valve cover on an XR600, true TDC occurs when the cam lobes are pointed downward when the piston is at TDC. Remove the cylinder head cover. Warning, do not drop the locating dowels into the cam chain cavity. There are two dowels, one on either side of the cover. Remove and discard the gasket. Note the positioning of the cam lobes, this will help during installation of your new Hot Cams camshaft. Note also the location of the sealed bearing on the end of the camshaft and the direction in which it is facing. Loosen the bolts that hold the camshaft sprocket. Remove the lower camshaft sprocket bolt first, it will be necessary to rotate the engine. Rotate the engine back to TDC. Release the spring tension on the cam chain tensioner by lifting the end of the spring out of its hole in the tensioner block. A spring tool is a good method. Be careful not to scar the cylinder head’s gasket surface for the cylinder head cover. Remove the allen bolt that holds the end of the tensioner block shaft
just to the inside of the tensioner block. Note the location of the tensioner block shaft cap ridge. Using a pair of pliers pull the shaft out by grasping the ridge and using a clockwise rotation of the shaft while pulling outward. Pull the tensioner block upwards, out of the cylinder head. Remove the top camshaft sprocket bolt. Pull the sprocket off the camshaft but maintain upward tension, do not allow the chain to sag, it is possible for the chain to “slip” on the bottom sprocket of the crankshaft and change the cam timing. Remove the camshaft. Remove the cam bearings. Set the stock camshaft with the auto-decompression aside. It is not possible to use the auto-
decompression on the Hot Cams so do not attempt to re-install. Use a manual decompression. Install the bearings onto the new Hot Cam

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Indian Rocker Arm End Play Rear Cylinder/ Front Cylinder Installation

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Filed Under (Indian) by admin on 12-11-2010

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Rear Cylinder 1Rotate the engine so that the rear piston is at Top Dead Center (TDC), compression stroke, so no load is on the valves. 2Using a 3/16″ allen wrench, remove the four screws securing the rear cylinder rocker cover. 3Remove the cover and inspect both O-ring seals. Discard if damaged or worn. 4Push both rocker arms towards the valve end support bracket (A) and using a feeler gauge check the gap between the rocker arms and the pushrod end support bracket (B). NOTE: The Rocker arm end play specification should be between 0.003″ to 0.012″. 5 Compare the measurement to the specification an determine whether adjustment is necessary. If the end play is within specification, adjustment will not be required. Refit the rocker cover (instructions 14 to 15) and carry out the same inspection on the front cylinder . If the measurement is outside the specification, adjustment will be required and shimming will be necessary (follow the remainder of these instructions). Adjustment 6Using a 1/4″ allen wrench remove the 4 screws securing the rocker shaft assembly.Refit the LH support bracket and reposition the complete assembly on the rocker base. Make sure that the three dowels are in place and the slots in the rocker shafts are properly aligned with the mounting screw holes in the RH support bracket. 11Clean the threads of the 4 support bracket screws and apply Blue Loctite to the first 4 threads. 12Fit the 1-3/4″ screws into the LH support bracket (A) and the 2″ screws to the RH bracket (B). Torque all screws in cross pattern to 16-20 foot-pounds. CAUTION: The rear piston must be at TDC, compression stroke, when tightening the support bracket screws. 13Re-check the rocker end play to ensure it is within specifica- tion. 13Lubricate the two O-rings with clean engine oil and refit them in the grooves in the rocker base. 14Refit the rocker cover.

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Harley-Davidson Evolution Engines S&S Billet Rocker Cover Assemblies Installation Instructions

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Filed Under (Harley Davidson) by admin on 30-10-2010

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1. Wash motorcycle, taking care to remove sand and other abrasive debris from engine and area of frame around engine. Remove battery, gas tanks, and all parts required to access original rocker covers. Remove top and center sections of rocker housings. Refer to authorized Harley-Davidson®Service Manual as necessary. Sparks from motorcycle electrical system can ignite gasoline fumes. To prevent sparks as well as prevent electric starter from becoming engaged inadvertently and causing personal injury, disconnect battery and remove from motorcycle before proceeding. Gasoline is toxic if fumes are inhaled, extremely flammable, and explosive under certain conditions. Do not smoke around gasoline, and perform installation in a well ventilated area away from sparks and open flame. 2. Remove pushrod cover retainer clips for front cylinder and collapse covers. Remove sparkplugs and rotate engine to place pushrods at lowest point on cam with front piston at TDC on compression stroke. Referring to Harley-Davidson®Service Manual as necessary, remove rocker assemblies, pushrods and lower rocker cover from front cylinder head. NOTE: Observe correct location of pushrods. S&S pushrod kits have longest pushrod for front exhaust, next longest for rear exhaust, shortest for rear intake, and remaining one for front intake. Remove all traces of old rocker housing gaskets from cylinder head, taking care to contain debris. Debris such as gasket material can interfere with oil circulation resulting in engine damage not covered under warranty. 3. Inspect S&S rocker cover assemblies. Remove rough or sharp edges from plain (unchromed) assemblies. Clean all metal parts with solvent. Dry with compressed air and remove any solvent residue with clean, lint free cloth. 3 CAUTION WARNING WARNING CAUTION 4. Install umbrella valves in rocker cover bases. See Picture 1. Valves go in vent ports nearest intake manifold on both front and rear rocker cover bases.

Harley-Davidson Twin Cam 88 S&S Billet Rocker Covers Installation Instructions

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Filed Under (Harley Davidson) by admin on 30-10-2010

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Failure to confirm pushrod/lifter placement before proceeding with installation can result in damage to rocker arm support plates and other parts. With pushrods at lowest point, front piston will be at TDC on Compression stroke. 4. Remove breather cover and baffle assembly. See Picture 2. 5. Remove rocker arm/rocker support plate. See Picture 3. NOTE – Gradually loosen rocker arm support bolts in following sequence (See Figure 1): 1. Left (driveside) rear 2. Right (camside) front 3. Right (camside) rear 4. Left (driveside) front Loosen bolts in sequence and in 1⁄ 4 -turnincrements for first 3⁄ 4 turn. Bolts can then be removed according to normal procedure. 6. Remove lower rocker housing bolts. NOTE – Gradually loosen lower rocker housing bolts in following sequence (See Figure 2): 1. Right (camside) front 2. Left (driveside) rear 3. Left (driveside) front 4. Right (camside) rear 5. Center front 6. Center rear Loosen bolts in sequence and in 1⁄ 4 -turn increments for first 3⁄ 4 turn. Bolts can then be removed according to normal procedure. 7. Remove lower rocker housing and gasket from head. Remove oil and any remaining gasket material from cylinder head gasket surface and clean gasket surface with lacquer thinner

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