HOME Disassembly and Assembly Always assemble or disassemble one part at a time. Do not work on two assemblies simultaneously. Be sure to make all necessary adjustments. Recheck your work when finished. Be sure that everything is done. using new or existing fasteners. Always use the recommended threadlocking agent for your specific procedure. Wiring, Hoses and Lines Hoses, clamps, electrical wiring, electrical switches or fuel lines if they do not meet specifications. Operate the vehicle to perform any final check or adjustments. If all is correct, the vehicle is ready to go back to the customer.
Instruments and Gauges Checking Torques on Fasteners Replace broken or defective instruments and gauges. Replace dials and glass that are so scratched or discolored that reading is difficult. Attempt to turn the fastener using a torque wrench set to the minimum torque specification for that fastener. If the fastener does not rotate, the fastener torque has been maintained. If the fastener rotates, remove it to determine if it is a lock-patch type. Bearings Anti-friction bearings must be handled in a special way. To keep out dirt and abrasives, cover the bearings as soon as they are removed from the package. If it has a locking agent, clean all locking material from the threaded hole.
Replace the fastener with a new one or clean the original fastener threads and apply the appropriate Loctite product (see appropriate procedure). Install and tighten the fastener to specification. Wash bearings in a non-flammable cleaning solution. Knock out packed lubricant inside by tapping the bearing against a wooden block.Wash bearings again. Cover bearings with clean material after setting them down to dry. Never use compressed air to dry bearings. If the fastener is not lock-patch type, install and tighten to specification. Coat bearings with clean oil. Wrap bearings in clean paper.
Magnetic Parts Trays Magnetic parts trays are becoming common in the service facility because they are convenient and can keep parts from becoming lost during a repair procedure. When bearings are installed against shoulders, be sure that the chamfered side of the bearing always faces the shoulder. Lubricate bearings and all metal contact surfaces before pressing into place. Only apply pressure on the part of the bearing that makes direct contact with the mating part. Install accelerated engine wear and damage. Parts that will be returned to service inside the vehicle's powertrain such as gears, thrust washers and especially bearings should never be kept in magnetic parts trays.
Bushings Do not remove a bushing unless damaged, excessively worn or loose in its bore. Press out bushings that must be replaced. REPAIR AND REPLACEMENT PROCEDURES When pressing or driving bushings, be sure to apply pressure in line with the bushing bore. Use a bearing/bushing driver or a bar with a smooth, flat end. Never use a hammer to drive bushings. Hardware and Threaded Parts Install helical thread inserts when inside threads in castings are stripped, damaged or not capable of withstanding specified torque. Inspect the bushing and the mated part for oil holes. Be sure all oil holes are properly aligned.
Replace bolts, nuts, studs, washers, spacers and small common hardware if missing or in any way damaged. Clean up or repair minor thread damage with a suitable tap or die. Gaskets Always discard gaskets after removal. Replace with new gas- kets. Never use the same gasket twice. Be sure that gasket holes match up with holes in the mating part. But be aware that sections of a gasket may be used to seal passages. Replace all damaged or missing lubrication fittings. Use Teflon pipe sealant or LOCTITE 565 THREAD SEALANT on pipe fitting threads. If a gasket must be made, be sure to cut holes that match up with the mating part. Serious damage can occur if any flange holes are blocked by the gasket.
Use material that is the right type and thickness. Threadlocking Agents Always follow specific service manual procedures when working with fasteners containing preapplied threadlocking agents when fastener replacement is recommended. When re-using fasteners containing threadlocking agents, be sure to com- pletely remove all existing threadlocking agent from fastener threads with a wire brush or wire wheel. Also, be sure to remove residual threadlocking agent from fastener hole using an appropriate thread chasing device and compressed air when Lip Type Seals Lip seals are used to seal oil or grease and are usually installed with the sealing lip facing the contained lubricant.
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