PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING
LUBRICATION INSTRUCTIONS Continued
Replace corroded or burned parts and parts which show signs of mildew.
Tighten loose connections.
Replace cracked or broken wires, circuit cards, relays, and connectors.
Replace cracked, torn, or burned insulation and heat shrink tubing.
11. Welding safety precautions and welding procedures are given in the following steps. Special instructions are covered in
Wear clothing such as leather or heavy denim. Do not wear clothing with loose pockets, trouser cuffs, or short
or rolled up sleeves.
Do not expose bare skin to welding arc.
Do not look directly at welding arc unless you are wearing a welding hood.
Wear flash goggles or tinted safety glasses (No. 2) in welding area.
Disconnect power source before changing parts or making equipment repairs.
Do not touch mechanism or any part of the electrode.
Make sure welding area has plenty of fresh air without being drafty. remove all toxic and combustible
Make sure all electrical and gas connections are tight.
Do not touch any metal in welding area with bare hands. Aluminum does not change color when hot.
10) Do not weld in the fuel compartment where sealing compound has been applied.
11) Use a welding screen to protect personnel from arc flash.
GENERAL WELDING PROCEDURES.
See TC 9-237.
12. FLUID LEAKS AND CHECKING FOR LEAKS
You are allowed to operate equipment with minor leaks (Class I or II). You must consider how
much fluid the item or system being checked or inspected can hold. When in doubt notify your
supervisor. When operating equipment with Class I or II leaks, continue to check fluid levels as
required in your PMCS. Report Class III or fuel leaks to your supervisor, or notify unit
maintenance for corrective action right away.
GENERAL. Fluid leaks in hoses and fluid lines affect the carrier parts operation.
The types and classes of leaks follow:
CLASS I. Fluid seepage is not great enough to form drops, but is shown by wetness or color changes.
CLASS II. Fluid leakage is great enough to form drops. Drops do not drip from the item being checked or
CLASS III. Fluid leakage is great enough to form drops that fall from the item being checked or inspected.