Model M Periodic Inspection Procedures
Step 1.
Verify the identity of the clamp by checking the I. D. plate on the clamp
body. If the I. D. plate is missing or not legible an RFID chip (Radio Fre-
quency Identification Device) is embedded in the clamp body or a clamp
component. If the I. D. plate is missing and the RFID chip is unavailable
call the Renfroe factory for instructions on returning the clamp for recerti-
fication.
Step 2.
Completely disassemble clamp.
Step 3.
Remove all dirt, grease, and other matter that may inhibit proper inspec-
tion of the clamp body or clamp components.
Step 4. BODY
A.
Inspect welds for fractures. RENFROE recommends a dye
penetrant or similar method of detecting indications on the
clamp. If an indication is found it may be necessary to use a
magnetic particle, ultrasonic or similar methods for determin-
ing damage to the clamp or components.
B.
Inspect surfaces of the body plate that come into contact with
the shackle yoke for wear, damage or distortion.
C.
Inspect shackle screw hole for wear and elongation.
D.
Inspect inside of swivel jaw block for displaced metal, frac-
tures, or distortion. Inspect condition of wave spring retaining
groove. Groove must be free of displaced metal, foreign mat-
ter or worn edges.
E.
Inspect inside of screw block for worn threads, fractures, and
displaced metal.
WARNING: Replace clamps containing fractures, elongated holes,
distorted jaw openings, distorted and worn threads, jaw openings
with displaced metal, or damaged spring retaining grooves.
Step 5
SCREW
A. Inspect for distortion, damaged threads and wear.
B.
Inspect for fractures, particularly in the area where the screw cup
mounts and on the opposite end where the hole is provided for the
handle.
