All components and parts must be carefully checked to determine:
a. If they are serviceable for reuse.
b. If they can be repaired.
c. If they must be scrapped.
DRILLED AND TAPPED (THREADED) HOLES
a. Inspect for wear, distortion, cracks, or any other damage in or around holes.
b. Inspect threaded areas for wear, distortion (stretching), or evidence of crossthreading.
c. Mark all damaged areas for repair or replacement.
METAL LINES, FLEXIBLE LINES (HOSES), AND METAL FlTTINGS
a. Inspect metal lines for sharp kinks, cracks, bad bends, or dents.
b. Inspect flexible lines for fraying, evidence of leakage, or loose metal fittings or connectors.
c. Check all metal fittings and connectors for thread damage, and check hex heads that are worn or
rounded by poorly fitting wrenches.
d. Mark all damaged material for repair or replacement,
MACHINED METAL PARTS
a. Inspect machined surfaces for nicks, burrs, raised metal, wear, or any other damage.
b. Check all inner and outer surfaces for breaks or cracks.
c. Allow no more than two l/4-inch deep dents in the blower housing assembly or the heater housing
assembly. No dent of any size should affect the function or installation of the heater.
d. Mark all damaged material for repair or replacement.
TAGGING WIRES AND HOSES
Whenever disconnecting a number of wires or hoses:
1. As soon as the first wire (1) or hose is disconnected, write number 1 on two tags (2) and (3). Secure
one tag (2) to the wire (1) or hose and the other tag (3) to the terminal (4), nipple, or fitting.
2. After disconnecting the second wire (5) or hose, write number 2 on two tags (6) and (7). Secure one
tag (6) to wire (5) or hose, and second tag (7) to terminal (8), nipple, or fitting.
3. Do the same for all the rest of the wires and hoses.