STANDARD MAINTENANCE INSTRUCTIONS
Castings, Forgings, and Machined Surfaces (Continued)
3. Inspect machined surfaces and castings for nicks, burrs, and raised metal. Mark damaged
areas for repair.
4. Using a straightedge or surface plate, check all mating flanges and mounting pads on housings
and supports for bends and warpage.
5. Inspect mating flanges and mounting pads for stains, which could indicate oil leakage.
6. Inspect all plug and tapped openings for damaged or stripped threads.
7. Check all castings for conformance to applicable Repair Standards included in procedural
1. Reject dowel pins for looseness or damage. Mark for repair.
Gears and Shafts
1. Inspect all gears and shafts for cracks using a magnifying glass (five power magnification
minimum) (item 73, WP 0176) and a strong light. Reject any found.
2. Inspect all gear teeth and splines for wear, sharp fins, burrs, and galled or pitted
surfaces. Reject any found.
3. Inspect shaft and gear hub splines for damage, wear, and fit with splines on mating parts.
Mating splines must match without binding or looseness.
4. Inspect the mating gear of any defective gear. Reject any found.
5. Check all gears and shafts for conformance to the applicable Repair Standards included in
procedural work packages..
Reject hoses for cuts, breaks, or abrasions in the wire-braided covering.
Reject hoses covered by plastic tubing for breaks.
Inspect hose fittings for leakage or twisting of the hoses in their assembled positions.
Inspect hoses connected to 45-degree or 90-degree hose-to-boss elbows for kinking caused by
incorrect elbow position.
Inserts: Helical-Coil and Threaded
To permit higher stresses on studs and bolts that are set in aluminum castings, it is standard
practice to install inserts of a stronger metal into which the studs or bolts are threaded.
Helical-coil and screw thread inserts are designated to perform this function. The inserts are
spiral steel coils having a right hand thread-shaped form on the inside and on the outside
diameter of the coils. A bar or tang at the bottom end of the coil, which is engaged by an
inserting tool, is used for threading the insert into the casting.
Some inserts have a serrated tooth section at the top end of the coil to stake them in place in
WP 0028 00-11