Cargo Winch Retrofit Kit

Underdeck Cargo Winch Retrofit Kit

The Underdeck Cargo Winch Retrofit kit for the C-130H allows the newer underfloor cargo winch originally developed for the C-130J to be retrofitted into older C-130s.

  • Increased capability over traditional “Bulldog” winch – Common with C-130J Underdeck Winch
  • Longer cable length and greater load capacity
  • Snatch blocks included to double or triple the cable pull rating
  • Fully powered movement—no clutch to slip
  • Control Pendant allowing full control while being close to the cargo load to monitor clearances and precise positioning.
  • Infinitely variable reel-in and reel-out speeds and precision movement as low five feet per minute
  • Fully stowed out of the way to not block valuable cargo floor space using Quick Access Panel
  • Increased Safety:
  • Eliminates potential Loadmaster injuries from having to maneuver a 300 lb (136 kg) above-deck ‘Bulldog’ winch around the cargo compartment
  • Eliminate additional Trip Hazards from use of tie-down chains
  • Larger cable diameter with higher breaking strength
  • Positive control of cargo with increased capacity greatly increases safety to personnel

The underfloor cargo winch has been developed, tested, and successfully operated on many C-130J aircraft for years. The kit and Service Bulletin are designed for the “short” C-130H aircraft but can be designed for other versions as well. Installation of this modification kit can be done with a minimum of changes to the aircraft and the kit can be provided with installation support and a Lockheed Martin field installation team, if desired.

Feature Underdeck Winch Traditional "Bulldog" Winch
Fixed or Moveable Fixed—Underdeck Requires Moving forUse - 300 lbs (136 kg) 
Floor Space Obstruction? No Yes
Single-Line Load Capacity 6,500 lbs (2,948 kg) 4,000 lbs (1,814 kg)
Winch Cable Length 200 ft (61 m) 100 ft (30 m)
Winch Cable Diameter 3/8 inch (9.5 mm) 1/4 inch (6.35 mm)
Winch Speeds High - 40 ft (12 m)/min
Low - 15 ft (4.5 ft)/min
Precision Low -
5 ft (1.5 m)/min
High - 36 ft (11 m)/min
Low - 11 ft (3.4 m)/min
Winch Controls Pendant with up to 60 ft (18 m) cable Controls on Winch Unit


Cargo Winch Kit
Cargo Winch

Contact Information:

AMMM Customer Support Center
(800) 952-6569 or +1 (770) 494-9131