Electric Chain Hoists (Single Brake)
Model NECH
PAGE: 34
NECH-0214
ACI Hoist & Crane | 2721 NE 4th Ave Pompano Beach, FL 33064| 954.367.6116
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Reeving/Parting
Check that the load chain is properly seated
in the reeving/parting and that the load
chain and associated parts are not twisted
around each other.
Replace.
Capacity & Warning
Label
Check that the capacity, warning and other
safety labels are not missing and are
legible.
Replace.
Control Device
Markings
Check that the control device markings are
not missing and legible.
Replace.
Fastening Devices
Check that the fastening devices are
properly secured (tightened) and that there
are no damage or missing parts.
Tighten or replace as
required.
Sheaves
Check for cracks, damage to pockets and
excessive wear.
Replace.
Load Block
Check for cracks, damage and distortion.
Replace.
Lubricant Levels
Check the quality and quantity of lubricant
levels.
Lubricate or replace.
Trolley Wheels
Check for flat spots and excessive wear.
Replace.
Supporting Structure &
Trolley
Check for cracks, damage and distortion.
Repair or replace as
required.
Electrical Apparatus
Check for pitting, deterioration, wear and
improper operation.
Repair or replace as
required.
Wiring & Fittings
Check for loose connections and abraded,
cut or nicked insulation and wires.
Tighten, repair or replace as
required.
6.4
Hook Inspection
Load hooks on hoists in regular service should be visually inspected daily by the operator. If the hoist is used in multiple
shift operations, load hooks should be visually inspected by the operator at the start of each shift or before being used
for the first time on each shift. When a visual inspection indicates that a more detailed inspection is required, follow the
procedures outlined below. These procedures also apply to scheduled frequent and periodic inspections. Refer to Table
6.4.1
for Hook original dimensions.
•
Measure hook throat opening from metal to metal of the hook as shown by dimension “g” in Figure 6.4.1.
DO
NOT
measure from latch to metal. Hook must be replaced when throat opening measurement has increased 5%
over the original throat opening dimension of a new hook. Refer to Table 6.4.2 for original dimensions and
replacement dimensions for throat openings of standard hooks specified for the ACI electric chain hoist line. To
aid in measuring the throat opening, it is recommended the hoist owner/user make a gage of the dimensions
shown in Table 6.4.2. This will allow quick measurement of the throat opening and immediate indication that the
hook replacement is required.
-
If the electric chain hoists are specified with special hooks not covered in Table 6.4.1, the hook throat
opening should be measured by the owner/user prior to installing the hoist. This will establish a
reference point to use in future inspections for determining when the throat opening dimensions
have increased by 5% thus requiring the hook be replaced. A gage similar to the one discussed
above is recommended. The gage should have the throat opening dimension measured prior to
installation, and a dimension 5% greater than the throat opening dimension measured prior to
installation.
•
Measure Hook depth at the load bearing point (base, bowl or saddle) of the hook as shown by dimension “c” in
Figure 6.4.1. The hook must be replaced when wear at load bearing point has decreased the original depth of
the hook load bearing point by 5%. Refer to Table 6.4.2 for original dimensions and replacement dimensions for
depth at load bearing point of standard hooks specified for the ACI electric chain hoist line.
-
If the electric chain hoists are specified with special hooks not covered in Table 6.4.1, the hook depth
at the load bearing point should be measured by the owner/user prior to installing the hoist. This will
establish a reference point to use in future inspections for determining when the wear at the load
bearing point has decreased the original depth by 5%, thus requiring hook replacement.
