Jet MINI-MITE II Serie Manuel De L'opérateur page 6

WARNING
1. Any hook that requires replacement because of excessive bends, twists, or throat opening indicates abuse or
overloading of the hoist. Therefore, other load-supporting components of the lever hoist should be inspected for
possible damage when such conditions are found.
2. Never repair hooks by welding or reshaping. Heat applied to the hook will alter the original heat treatment of the hook
material and reduce the strength of the hook.
3. Never weld handles or other attachments to the hook. Heat applied to the hook will alter the original heat treatment of
the hook material and reduce the strength of the hook.
HOOKS INSPECTION
Refers to ASME B30.10, Safety Standard for Hooks. Inspect hooks and measure hook throat opening at least once a month.
Between regular inspections check visually daily for deformation, distortion, twisting, damage, and missing or damaged
hook latches. Inspect as follows:
1. Measure hook throat opening from metal to metal of the hook as shown by dimension A in Figure 1. DO NOT measure
from latch to metal. Hook must be replaced when throat opening measurement has increased 8% over the original
throat opening dimension of a new hook, as follows:
CAPACITY DIMENSION A
TONS NEW HOOK
1/4 24mm
1/2 30mm
3/4 30mm
1-1/2 36mm
3 44mm
6 59mm
2. Measure hook depth at load bearing point (base, bowl or saddle) of the hook. Hook must be replaced when
wear at load bearing point is 10% of the original depth of the hook load bearing point.
3. A bend or twist of the hook exceeding 10° from the plane of the unbent hook requires replacement of the hook.
4. A hook latch that is missing shall be replaced.
5. A hook latch that is inoperative shall be repaired or replaced.
6. A hook with a hook latch that does not close the throat opening of the hook shall be removed from service until the
latch is replaced or repaired.
7. Hooks having damage from chemicals, corrosion, or deformation shall be repaired or replaced.
Due to variations in the manufacturing process, the dimensions of a new hook are variable. For accurate record
keeping we recommend users record measurements A and B of the hook before use. Record this information in the
spaces above and calculate the replacement value by multiplying your measurement by 1.08 for dimension A or
by 0.90 for dimension B.
HOOKS
DIMENSION A DIMENSION B
REPLACE HOOK NEW HOOK
25.2mm
31.5mm
32.4mm
38.9mm
47.5mm
63.7mm
DIMENSION B
REPLACE HOOK
16mm 14.5mm
18mm 16.5mm
19mm 17mm
26mm 23mm
35mm 31mm
46mm 43.7mm
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A
B
Figure 1