Hydraulic Surge Couplers

Select Part Number to View & Order Online

TextModel DA91 is a heavy duty surge brake actuator for trailers with two or four wheels. When brakes are applied on the towing vehicle, forward inertia of trailer toward towing vehicle applies brakes on trailer in direct relation to manner brakes are applied on towing vehicle. Brake towing vehicle hard and brakes on trailer are applied hard.  Master cylinder push rod spring assembly protects system from hydraulic pressure overload.

Part #	Description
21-111	Demco 2" Surge Coupler (Bulldog Head) - 7000 lbs.
21-112	Demco 2 5/16" Surge Coupler (Bulldog Head) - 7500 lbs.

Atwood Hydraulic Surge Brakes add safety and convenience to trailer towing.  Less complicated than other systems, the Atwood brake system provides such benefits as no "in car" hook up, no hand controls, and no special car to trailer wiring.  These features, plus automatic braking, smooth performance and simple operation are combined to provide a low cost, convenient brake system.

Part #	Description
21-200-Disc	2” Atwood Surge Coupler - 6,000 lbs. capacity - Disc
21-200	2” Atwood Surge Coupler - 6,000 lbs. capacity
21-200-8K	2” Atwood Surge Coupler - 8,000 lbs. capacity
21-200-A	Replacement Master Cylinder Only
21-200-C	Replacement Filler Cap Only
21-200-G	Replacement Shock Only
21-200-B	Master Cylinder Repair Kit

Part #	Description
21-405	Balcrank 6K w/Leveler Channel (Bolt On)

The Titan MD-60 coupler has a 6,000 pound capacity (max. G.V.W.R.) and 600 pound tongue load.  It is designed for a 3” wide trailer tongue.  The unique adjustable feature allows it to fit either an 1 7/8” ball or a 2” ball.

Part #	Description
21-410	Dico Model 60 Multi-fit Surge Coupler (1 7/8’ - 2” ball)
21-411	Replacement Multi-fit Repair Kit Only
21-412	Replacement Lever Lock Repair Kit Only
21-306	Replacement Master Cylinder Kit Only
21-306-2	Replacement Master Cylinder Repair Kit Only
21-307	Replacement Filler Cap Only
21-308	Replacement Shock Only

Part #	Description
21-400	Dico Model 10 Surge Coupler w/ 2 5/16” Head - 10K
21-401	Dico Model 10 w/ Leveler Channel
21-305	Replacement Master Cylinder Rebuild Kit (MD10/20)
21-305-1	Replacement Master Cylinder Only (MD10/20)
21-320	2 5/16” Coupler Repair Kit Only (MD10)
21-414	Replacement Shock Only (MD 10)
21-321	Replacement Filler Cap & Gasket Only (MD10)
21-309	Replacement Cover (MD10)

Adjustable Head Sets

  This coupler can either be used in conjunction with the surge couplers above or with the leveling channel .  G.V.W.R. 12,000 lbs.

Part #	Description
21-302	2 5/16” Head Assembly

Heavy duty steel construction, multi-position mounting in either 3 position, 5 position channel or weld style.  
Zinc-plated easy latch mechanism allows for quick engage/disengage of coupler.
Capacity: 12,000 lbs. M.G.T.W. (2-5/16") --- 10,000 lbs. M.G.T.W. (2")

Part #	Description
21-302-1	2 5/16" Coupler, 12K, Bolt-On, Painted (12K)
21-302-2	2" Coupler, 10K, Bolt-On Painted (10K)
21-303	Bolt & Nut GR5

Designed for "tag along" trailers used primarily in the construction business,
BULLDOG forged adjustable couplers allow level towing behind a variety of towing vehicles.
The height of the trailer tongue may be quickly adjusted to match the height of the hitch ball for safer, smoother towing.  Couplers fit inside a 2 ⁷/₈" wide channel. For leveling channels, see below.

Part #	Description
21-302-4	2" Adjustable Forged Head - (7K)
21-302-3	2 5/16" Adjustable Forged Head - (12.5K)

• Unique cast steel shield prevents damage to coupler latching mechanism
• Patented Wedge-LatchT design act like a vise, keeping the trailer ball locked in the ball  pocket
• Hardened steel field serviceable ball clamp provides years of trouble free towing and  eliminates need to replace coupler
• Fast, convenient latching simplifies hook-up and saves time.  No more fighting calm shell  style latching mechanisms
• Rust resistant grey dip primer ensures total coverage and excellent corrosion resistance
  

  Part #	Description
  21-302-6	2 5/16" Adjustable Cast Head - (14K)

  Note: Bolts and nuts included.  For leveling channels, see below.

Capacity: 2,000 lbs. maximum vertical load / 12,000 lbs. M.G.T.W.
3" I.D. eye 1-9/16" eye section.

Part #	Description
21-301	Buyers 3" Pintle Ring Assembly

Leveling Channel  

Part #	Description
21-304	4-Hole Leveler Channel
21-430	6-Hole Leveler Channel w/Gussets
21-303	Bolt & Nuts (2 required)
21-430-1	6-Hole Leveler Channel w/o Gussets

When installed between the hyd. surge coupler and the brake line, it makes it possible to back-up without activating the brakes.

Part #	Description
18-976	Hyd. Brake Lock Out Solenoid