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 TM 55-1905-223-24-16
SECTION II. EQUIPMENT DESCRIPTION AND DATA
1-6.
General. The McElroy model 540 HAW-15/7.5 stern anchor winch is a hydraulic driven anchor winch designed for
use with 1-1/4 inch nominal diameter wire rope. The spool stores 1200 feet of wire rope. The winch is rated for 50,000
pound line pull applied to the first layer of cable. The brake is rated at 60,000 pounds, and the dog is rated at 119,000
pounds at the first layer of cable.
1-7.
Characteristics, Capabilities, and Features. A very broad view of the stern anchor winch is as follows:
a. Characteristics.
(1)
Electrically driven, hydraulically operated, with a triple reduction gearbox.
(2)
Manually operated clutch and brake.
(3)
Automatic failsafe brake.
b. Capabilities and Features.
(1)
Raises and lowers the anchor.
(2)
Winds and stores 1200 feet of wire rope.
(3)
Usable for other kinds of hauling besides anchor handling.
(4)
Handles 35 ft/minute first wrap.
1-8.
Location and Description of Major Components. The stern anchor winch is made up of the winch and
hydraulic power pack assemblies. These major components are illustrated in FIGURES 1-1 and 1-2, and described
below.
a. Winch Assembly.
(1)
Spool and levelwind. Winds up and stores the anchor wire rope.
(2)
Brake handwheel. Manually operated brake handwheel for braking during spool operation.
(3)
Failsafe brake.
(a) Automatically brakes the hydraulic motor assembly when winch is at neutral position or during loss of
hydraulic pressure.
(b) Automatically brakes the hydraulic motor assembly when there is a loss of or too little pilot pressure
from hydraulic valve assembly.
(4)
Flow (speed control) valve. When activated, controls the output rate of speed to the triple reduction gearbox.
(5)
1-2
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