hydraulic surge couplers
DESCRIPTION
List of hydralic surge couplersTRANSCRIPT
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BREAKAWAY KITS
Part # Description Mfg. #
20-236-7 Dexter’s 9 amp breakaway kit features a rechargecable, sealed 34-285-00
maintenance-free battery and charger, for double free towing.
The kit is compact in design and exceeds DOT regulations.
HYDRAULIC SURGE COUPLER
Part # Description Mfg. #
21-111 Demco 2" Surge Coupler (Bulldog Head) - 7000 lbs. 8509612
21-112 Demco 2 5/16" Surge Coupler (Bulldog Head) - 7500 lbs. 8759812
21-406-A Demco Master Cylinder Kit
21-406-B Demco Master Cylinder Cap
Model 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 tow-
ing vehicle hard and brakes on trailer are applied hard. Master cylinder push rod spring assembly
protects system from hydraulic pressure overload.
Part # Description Mfg. #
21-400 Dico Model 10 Surge Coupler w/ 2 5/16” Head - 10K 16075
21-401 Dico Model 10 w/ Leveler Channel 18909
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) 12426
21-321 Replacement Filler Cap & Gasket Only (MD10) 12503
21-309 Replacement Cover (MD10) 15070
21-17352 2 5/16" Actuator with Drop-10k DI 17352
21-18898 2 5/16" Adjustable Actuator-12k DI 18898
21-422 2 5/16" Actuator Lunette Eye -7.5k
Part # Description Mfg. #
21-405 Balcrank 6K w/ Leveler Channel (Bolt-On) 850625
21-251 Fulton Actuator - 6,000 lbs. capacity, Zinc
21-251-A Master Cylinder (21-251)
21-251-B Shock Damper for 21-251
21-251-C Push Rod Assembly, Surge Brake
21-250-A Cequent Master Cylinder Cap
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Part # Description Mfg. #
21-406 Demco DA10 Surge Coupler w/ Levelor Channel - 10K 8101222
21-406-A Replacement Master Cylinder Kit - Includes Gasket, Bolts, & Boot 5650
21-406-B Replacement Master Cylinder Cap - Includes O-Ring 3876
21-408 20K Actuation w/ Channel, 4 Hole 8202022
21-407 20 K Actuation w/ Plate 8202052
21-113 20K Pintle Ring Assembly 09557-97
Note: Head & Bolts Sold Seperately. See page # 102-103.
Part # Description Mfg. #
21-410 Dico Model 60 Multi-fit Surge Coupler (1 7/8’ - 2” ball) 43397
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
21-410-M Coupler Case (Model 60)
21-410-J Front and Back Rollers
21-311 Breakaway Lever Assembly (Model 60)
21-410-K Breakaway Spring
21-410-A Push Rod Assembly 23463 (Model 60)
21-410-I Gasket for Master Cylinder Cover (Model 60)
21-317 Connector Dico (Model 60) (Model 6)
21-410-H Master Cylinder Cover (Model 60)
21-313 Dico (Model 60) CPL Lock Tab 23383
21-306-2 Master Cylinder Repair Kit (Model 60)
21-412 Lever Lock Repair Kit (Model 60)
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.
HYDRAULIC SURGE COUPLER
Part # Description Mfg. #
21-200-Disc 2” Atwood Surge Coupler - 6,000 lbs. capacity - Disc 88740
21-200 2” Atwood Surge Coupler - 6,000 lbs. capacity (Refer to Appendix) 82543
21-200-8K 2” Atwood Surge Coupler - 8,000 lbs. capacity (Refer to Appendix) 83000
21-200-A Replacement Master Cylinder Only 85841
21-200-C Replacement Filler Cap Only 87478
21-200-E Release HDL Kit
21-200-F S/Shoulder Bolt Rep Kit 85842
21-200-G Replacement Shock Only 85830
21-200-B Master Cylinder Repair Kit 85837
21-200-H Atwood Push Rod Assembly
21-200-I S/Boot Rep. Kit #84258 85852
21-200-J Emergency Mechanism Pieces
0000-21-013 Atwood Surge Coupler - 6,000 llbs. capacity - Zinc Plated
22P-335 Hydraulic Adapter 3/16” to 1/8”
Atwood Hydraulic Surge Brakes add safety and convenience to trailer towing. Less compli-
cated 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.
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HYDRAULIC SURGE COUPLER
Part # Description Item #
21-300 Dico Model 20 Surge Coupler w/ Channel 20K 18898
21-300-1 Dico Model 20 Surge Coupler w/ Pintle Ring 20K 12974
21-300-2 Dico Model 20 Surge Coupler w/ 2 5/16” Head 20K 15210
21-300-3 Dico Model 20 Surge Coupler w/ no Head 20K 10551
21-305 Replacement Master Cylinder Rebuild Kit (MD10/20) N/A21-305-1 Replacement Master Cylinder Only (MD10/20) 23744 14
21-310 Replacement Shock (MD20) 7784 17x2
21-321 Replacement Filler Cap & Gasket Only (MD20) 12503 14
21-309 Replacement Cover (MD10) 15070 23
21-300-N Roller for Dico (MD10) 16019 4x2
21-300-O Roller Bolt for Dico (MD10) 8288 5x2
21-300-S Nut-Hex 1/2” NC #7985 6x2
21-300-L Grease Zerk (MD10) 144901 8x4
21-315 Front Roller Cover (MD20) 9
21-300-I Actuator Rear Roller for Dico (MD10) 10x621-300-T Rear Roller Bolt (MD20) 11x2
000-21-008-N Slotted Nut 5/8” NF #7971 12x3
21-316 Spacer (MD20) 15x321-310-A Damper Bar 8298 18x2
00-21-030 Actuator Push Rod - Blk. for Dico (MD10) 1921-300-B RH Cylinder Brkt. for Dico 0838800 28
21-300-A LH Cylinder Brkt. for Dico 0838900 29
21-300-R Breakaway Lever Assembly 30
21-300-F Dico Weatherseal #10552 31
21-300-P Dico Breakaway Lock RH #10527 32
21-300-Q Dico Breakaway Lock LH #10526 33
06-21-015 Inner Slide with Lunette Eye 36
21-301-1-P Titan Adjustable Clevis Hitch 1” 38
21-303-1 Adjustable Coupler Bolt 5/8” X 4.5 GD5 39x3
21-303-2 Adjustable Coupler Nut for 21-303-1 40x3
21-318 Connector #12099 Dico (MD/20) 4221-300-E Gasket for Connector Dico 7745 43
000-21-001 Inner Slide Dico (MD/20) 2 5/16” 44
21-302-1 Adjustable Coupler Head 2 5/16” Buyers N/A
21-301 Adjustable Pintle Ring N/A
000-21-009 CRear Roller Bolt 5/8 X 5 UNF 47
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Part # Description Item #
21-421 2 5/16" Actuator Coupler -7.5k
21-300-M Bearing: Top & Bottom Dico (MD10) 221-420-G Front Roller 321-420-H Front Roller Cover 7500# 4
21-420-A Breakaway Lever Assembly (MD6) 7, 821-420-F Breakaway Spring (MD6) 90000-21-007 Master Cylinder Mtg Plate 12
21-475-1 Push Rod Plate 14
21-475 Push Rod for Titan 7.5K Actuator 1521-423 Master Cylinder 10271 7.5K (MD6) 1621-460 Filler Cap with Gasket Dico (MD6) 1721-317 Connector (MD 6/60) 180000-21-010 Spring 1027400 21
21-414 Shock 12426 (MD 6/10) 2221-300-I Dico Actuator Rear Roller (MD10) 2321-306-2 Master Cylinder Repair Kit (MD60) N/A21-320 Dico Repair Kit: 2 5/16” Coupler N/A
HYDRAULIC SURGE COUPLER
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Part # Description Item #
21-300-M Bearing: Top & Bottom Dico (MD10) 2x6
21-300-J Bearing: Side Dico (MD10) 3x8
21-300-N Roller (MD10) 16019 4
21-300-O Roller Bolt for Dico (MD10) 8288 5
21-300-R BreakawayLever Assembly 10
21-300-F Dico Weatherseal #10552 11
21-300-Q Dico Breakaway Lock LH #10526 12
21-300-P Dico Breakaway Lock RH #10527 13
21-309 Cover Dico (MD10/20) 16
21-322 Inner Slide Assembly (MD10) 18
21-305-1 Master Cylinder Dico (MD10/20) 19
21-321 Plastic Filler Cap Dico (MD10) 21
21-300-E Gasket for Connector Dico 7745 22
21-318 Connector #12099 Dico (MD20) 23
21-300-B RH Cylinder Brkt. Dico 0838800 24
21-300-A LH Cylinder Brkt. Dico 0838900 24
00-21-030 Actuator - Push Rod Blk Dico (MD10) 28
21-414 Shock 12426 (MD6/10) 29x2
21-300-1 Actuator Rear Roller Dico(MD10) 30x2
00-21-027 Actuator Master Pin Dico (MD10) 31x2
21-301-1 Adjustable Clevis 3/4” Fits Channel 35
21-303-1 Adjustable Coupler Bolt 5/8” X 4.5 GD5 36x2
21-303-2 Adjustable Coupler Nut for 21-303-1 37x2
00-21-032 Adjustable Coupler Nut for 21-303-1 38
21-300-S Nut-Hex 1/2” NC #7985 41
21-300-L NGrease Zerk (MD/10) 144901 42
21-302-1 Adjustable Coupler Head 2 5/16” Buyers 44
21-301 Adjustable Pintle Ring 45
21-320 Dico Repair Kit 2 5/16” Coupler N/A
21-305 Master Cylinder Rebuild Kit (MD10/20) N/A
HYDRAULIC SURGE COUPLER
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Part # Description Mfg. #
21-302-1 2 5/16” Coupler, 12K, Bolt-On, Painted (Refer to Appendix) 0090100
21-302-2 2” Coupler, 10K, Bolt-On Painted 0090150
21-302-2A 2 ” Adjustable Coupler w/ 3 pos chn (1)
21-302-1A 2 5/16” Adjustable Coupler w/ 3 pos chn (1)
21-326-05 2 5/16” Adjustable Coupler w/ 5 pos chn (1)
Heavy duty steel construction, multi-position mounting in either 3 position, 5 position chan-
nel 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")
ADJUSTABLE HEAD SETS
Part # Description Mfg. #
21-302 2 5/16” Head Assembly 1882000
18-660 2 5/16” Weld-On Coupler 17550
This coupler can either be used in conjunction with the surge couplers above or with the level-
ing channel on page # 104. G.V.W.R. 12,000 lbs.
Part # Description Mfg. #
21-100 Ball Crank Actuator for 2” Ball LO 16100
18-16039 Ball Crank Actuator for 2 5/16” Ball LO 16039
BALL CRANK A-FRAME ACTUATORS
STRAIGHT TONGUE BRAKE ACTUATORS
Part # Description Mfg. #
QT 16015 2" Ball, 3" Channel / Requires no connections to towing vehicle QT 16015
QT 16062 2 5/16” Ball, 3" Channel / Requires no connections to towing vehicle QT 16062
BRAKE STRAIGHT TOUNGE ACTUATORS - LUNETTE EYE COUPLERS
Part # Description Mfg. #
21-17778 3” Eye Adjustable Actuator-12k DI 17778
21-18911 3” Eye Adjustable Actuator-10k DI 18911
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Part # Description Mfg. #
21-301-HD B20K 3” Pintle Ring, Wallace Forge G09330
Part # Description Mfg. #
21-302-6 2 5/16” Cast Bulldog Coupler - (14K lbs.) -w/ Bolts & Nuts A256C0317
- Unique cast steel shield prevents damage to coupler latching mechanism
- Patented Wedge-Latch™ design act like a vise, keeping the trailer ball locked in the ball
- 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 Mfg. #
21-301 Buyers 3” Pintle Ring Assembly (Refer to Appendix) B16137
20-344 Pintle Ring w/ 5 pos chn (1)
20-301-3K Pintle Ring w/ 3 pos chn (1)
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 Mfg. #
21-302-4 2” Forged Adjustable Coupler - 7,000 lbs. Gross 028390
21-302-3 2 5/16” Forged Adjustable Coupler - 12,500 lbs Gross 028630
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 tow-
ing. Couplers fit inside a 2 7/8” wide channel.
ADJUSTABLE HEAD SETS
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Part # Description Mfg. #
18-976 Hyd. Brake Lock Out Solenoid
HYDRAULIC LOCK-OUT SOLENOID
When installed between the hyd. surge coupler and the brake line, it makes it possible to back-
up without activating the brakes.
HYDRAULIC LINE KIT
Part # Description Mfg. #
21-500 Single Sprung Axle Plumbing Kit 9504
21-501 Single Torflex Axle Plumbing Kit 9507-1
21-501-1 Single Torsion Line Kit 1213-005
21-600 Tandem Sprung Axle Plumbing Kit 9505
21-601 Tandem Torflex Axle Plumbing Kit 9507-2
21-602 Triple Plumbing Kit
21-603 Triple Torsion LIne Kit 9534-3
22P-005 Rubber Flex Hose, Straight End 18018-MF
22P-005-2 Rubber Flex Hose, All Plumbing Kits, 90 Degree End 11627
22P-005-1 Rubber Flex Hose, Hydraulic Disc 14718-MF
21-400-P Second Axle Add-on Kit
21-500-P Positor Single Axle Plumbing Kit
22P-600-P Positor Tandem Plumbing Kit
Used to hook hydraulic actuators to hydraulic braked axles.
Part # Description Mfg. #
21-304 4-Hole Leveler Channel (Refer to Appendix) 8978
21-430 6-Hole Leveler Channel w/Gussets B8979
21-303 Bolt & Nut GR5
Part # Description Mfg. #
21-301-1 Adjustable Clevis 3/4” Fits Channel 10K
21-301-1-P Titan Adjustable Clevis Hitch 1” 12K
Used for leveling the Titan, Buyers, Fulton or Bulldog adjustable couplers above. Requires
two bolts and nuts per coupler.
LEVELING CHANNEL
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