Dry-cleaning solvent (P-D-680) is toxic and flammable. Wear protective goggles and gloves; use
only in well ventilated area; avoid contact with skin, eyes, and clothes, and do not breathe
vapors. Keep away from heat or flame. Never smoke when using solvent; the flashpoint for type
I dry-cleaning solvent is 100oF (37.8oC) and for type II is 138oF (58.9oC). Failure to do so may
result in injury or death to personnel.
If personnel become dizzy while using cleaning solvent, immediately get fresh air and medical
help. If solvent contacts skin or clothes, flush with cold water. If solvent contacts eyes,
immediately flush eyes with water and get immediate medical attention.
Use cleaning compound (Appx. C, item 7) or dry-cleaning solvent (Appx. C, item 16) to wash lubricant from all
unpainted metal parts of hydraulic impact wrench.
To clean painted metal parts, use cleaning compound (Appx. C, item 8).
c. Use detergent (Appx. C, item 11) and hot water to clean all plastic and rubber parts.
d. Dry all parts with a clean cloth (Appx. C, item 5).
e. After rubber and plastic parts are clean, dry thoroughly.
Before installing new parts, remove any rust-preventive compound, protective lubricants, etc., and lubricate
those parts requiring lubrication.
Apply a light film of lubricating oil (Appx. C, item 14) to all unpainted metal parts to prevent tarnishing.
4-10. RUST REMOVAL.
Remove rust or corrosion from all parts of material. To remove rust or corrosion from unfinished surfaces, use steel wire
cleaning brushes, abrasive cloths, or corrosion-removing compound (Appx. C, item 9). On finished surfaces, remove
rust or corrosion by buffing surface with a fine, rotary-wheel, wire brush.
On highly polished surfaces, remove rust or corrosion by buffing surface with buffing compound (Appx. C, item 6). Apply
very light buffing pressure. To remove rust or corrosion by hand, use crocus cloth (Appx. C, item 4).
4-11. IMPACT HEAD SERVICING AND REPAIR.
This task covers:
Tool kit, general mechanic's (SC 5180-90-CL-N26)
Grease, automotive (Appx. C, item 12)
Bushing driver (5180-00-121-3866)
Lockwasher (4) (Appx. F, item 4)
Socket wrench attachment, socket head screw,
Solvent, dry-cleaning (Appx. C, item 16)
1/4-inch (in.), 3/8-in.-drive (5120-00-596-8508)
Wrench, torque, 0-600 pound-inches (lb-in.), 3/8-in.-
square drive (5120-00-542-5681)
Hydraulic impact wrench disconnected from power
Hydraulic impact wrench secured in vise with soft-jaw
Cloth, cleaning (Appx. C, item 5)
caps; impact head assembly facing upward.
Gasket (Appx. F, item 1)