TM 55-1905-223-24-10
Table 1-1. Bow Ramp Winch Equipment Data - CONT
Characteristics
Reference Data
Spooling Direction
Towards drum centerline
Drum Capacity, Each Half
25 ft active line plus 3
dead wraps. (Approximately
12 ft for dead wraps and 8
in for line anchor)
Planetary Gear Reducer, 3 stages
234:1 overall reduction
Hydraulic Motor
Type
Gerotor - through shaft design
Displacement
2.54 cubic in per revolution
Maximum Intermittent Pressure
3,000 psi
Operating Features
Slack Wire Limitation
Slack wire limit switch
Manual Operation
Safety interlock switch and
hydraulic motor bypass valve
Emergency Operation
Drive handle with safety brake/
Hydraulic Power Pack Assembly
Model
21-69069
Manufacturer
MacGregor-Navire (USA), Inc.
Type
Hydraulic
Length
68.50 in
Width
37 in
Height
43 in
Weight
1,550 lb
Winch Control Valve Manifold Assembly
MacGregor-Navire (USA), Inc.
Length
4 in
Width
1.75 in
Height
Weight
Hydraulic Requirements
Flow
30 gpm
Pressure
Normal
2,060 psi across motor
Maximum
3,000 psi
Motor Seal Drain
400 psi maximum
Hydraulic Brake
Initial Release
220 psi
Full Release
230 psi
Release Displacement
1.0 cubic in, maximum
Maximum Working Pressure
3,000 psi
1-5