-Install relief adjustment screw (see para. 4-16),
-Install relief valve (see para. 4-15),
-Install reversing spool and packings (see para. 4-13), and
-Install impact head assembly (see para. 4-11).
4-18. INSPECTION OF INSTALLED ITEMS.
These procedures shall indicate if parts of the hydraulic impact wrench can be rebuilt within the limits prescribed in AR
710-2. Follow typical cleaning procedures as shown in paragraph 4-9. Clean dirt, lubricants, and rust scale from all parts
that can be inspected without disassembling. Inspect for following:
Any missing parts
Breaks, cracks, corrosion, and damaged threads in housing
Rust, corrosion, or binding in stem and internal mechanisms
4-19. INSPECTION-ACCEPTANCE/REJECTION CRITERIA.
General. These inspection procedures list general criteria indicating if a part shall be repaired. To conserve
supply of available parts, care must be exercised to ensure that parts are not discarded because of poor
appearance or minor discrepancies. Every effort will be made to reclaim and repair such parts. For antifriction
type bearings, use TM 9-214 as a guide to determine serviceability.
Castings. Visually inspect all castings. When any of following conditions exist, casting is unserviceable.
Worn to extent that mating parts do not fit correctly
Common Hardware. Visually inspect all common hardware. When not comparable to new, common hardware
Springs. Visually inspect all springs. When any of following conditions exist, spring is unserviceable.
Loss of force
Rusted or corroded
Nicks in coils
Threaded Parts Other Than Common Hardware. Visually inspect threaded portion of all parts. When any of
following conditions exist, part is unserviceable.