MAINTENANCE INTRODUCTION (CONT).
Coat oil seals evenly with oil or grease before installing. Install oil seals with seal lip facing in, applying an
even force to the outer edge of seal. If oil seals are to be installed over keyed or splined shafts, use a guide to prevent
sharp edges of the keyway or splines from cutting the seal. Guides can be very thin gauge sheet metal shaped to the
required diameter. Make certain guide edges are not sharp and are bent slightly inward so they do not cut the seal.
Lubricate bearings before reassembly with the type of lubricant normally used in the related housing or
container. This will provide lubrication during the first run-in until lubricant from the system can reach the bearings.
Installation. Put hoses, tubes, lines and, electrical wiring in place by matching identification tags, markings on
equipment, and using illustrations presented. Replace cable ties (item 36, Appendix E) as necessary. Use sealing
compounds as required in each maintenance task. When installing screws and nuts, be sure to tighten to torque values
given. For torque values, refer to tables 4-4 and 4-5.
Welding Procedures. Welding may be used to repair cracks in steel parts. These repairs should be made only
when replacement parts are not available. Do not weld running parts. Visually inspect all welds for cracks. Parts that
carry a great load should receive magnetic particle inspection. Critical nonferrous parts may be inspected with
Sheet Metal Repair. Straighten minor body dents by bumping with a soft-faced hammer while using a wooden
block backing. Repair minor skin cracks by installing patches.