Bulldog Trailer Jack Replacement Part, Level Assembly w/Hardware for Bulldog Powered Drive Tongue Jack, 4,000 lbs.Bulldog$40.02Out of Stock
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Founded in 1920, Bulldog has become the standard for heavy-duty trailer connection hardware in agricultural, military and utility service. The line covers gooseneck hitches and couplers, A-frame and channel-mount trailer couplers with the Wedge-Latch mechanism, and heavy-duty jacks, built for unmatched strength, reliability and safety under demanding loads.
Bulldog was founded in 1920 and has spent more than a century supplying the connection hardware that heavy trailers depend on. Its market has always been the demanding end: agricultural, military and utility applications where a coupler failure is not an inconvenience but a serious incident. The brand summarises its position as Tough and Tested, and it sits within the Horizon Global towing group alongside Reese, Draw-Tite, Fulton, Tekonsha, Bargman and Wesbar.
Gooseneck equipment is the brand's signature. Gooseneck hitches mount in the truck bed over the rear axle, which places the load where the chassis can carry it properly and allows far tighter turning than a receiver hitch permits. Matching gooseneck couplers attach at the trailer end, in round tube and square configurations across the capacity range used by livestock, equipment and flatbed trailers.
The conventional trailer coupler range is built around the Wedge-Latch mechanism, which uses a wedge to take up wear between coupler and ball rather than relying on a fixed clamp that loosens over time. That matters on a trailer accumulating hard miles, where slack in the coupling shows up as noise and shock loading. Couplers are offered in A-frame form for standard tongues and in channel-mount form for straight tongue and fabricated frames, with adjustable channel versions that let a coupler be positioned to suit the tongue height.
Heavy-duty jacks complete the line, sized for the tongue weights that gooseneck and equipment trailers generate. Across the range the emphasis is consistent: forged and heavy-section components, load ratings backed by testing, and hardware specified for agricultural, military and heavy-duty commercial use rather than occasional recreational towing.
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Installation: BULLDOG® 3,500lb. A-Frame Powered Jack
The Powered A-Frame Jack is an electric jack designed to attach to the top surface of a trailer A-frame coupler. It extends to raise the trailer off the tow vehicle's ball and retracts to lower it back down. The jack includes a built-in circuit breaker, an LED light, and an optional manual override crank for operation if power is lost. It is sealed and maintenance-free at the motor level.
The jack includes three 3/8" diameter, 1" long, grade 5 bolts and nuts; lock washers and star washers for mounting; a black wire lead for battery connection; a removable cap for manual override crank access; and an LED light under the top cover. A Plunger Pin Kit Assembly and Bubble Level may be included depending on the model purchased.
The jack is designed to attach to A-frame couplers. The dual mounting pattern allows positioning either facing the tow vehicle or for side operation. The manual does not specify exclusions based on trailer type, bed length, or other characteristics. If you are uncertain about compatibility with your specific trailer, contact Cequent Performance Products at 800-604-9466 or www.cequentperformanceproducts.com.
Yes. The dual mounting pattern allows the jack to be positioned either facing the tow vehicle or for side operation. Position the drop leg beneath the coupler mounting hole and place the jack outer tube through the A-frame coupler hole and over the drop leg in the desired orientation.
If your trailer has a weight distribution kit attached, you must check for any interference to avoid damage during operation. The manual does not provide specific details about which kits are compatible; inspect your installation carefully or contact Cequent Performance Products at 800-604-9466 for guidance.
The manual does not specify required tools. However, installation involves attaching bolts and nuts, routing a wire lead, and potentially installing a Plunger Pin Kit Assembly. Standard tools for bolt installation (wrench or socket set) and cable management (cable ties) would be needed. A torque wrench is required to torque bolts to 15–20 ft-lbs.
No. The battery charger is not included. You must provide your own charger. It is important to maintain the electrical system including the battery and charger, and ensure the battery is fully charged prior to use.
Three 3/8" diameter, 1" long, grade 5 bolts and nuts are provided with the jack. Lock washers and star washers are also included. The lock washers are placed between the bolt head and the top of the jack mounting bracket. Star washers ensure metal-to-metal contact between jack and coupler for proper grounding.
1. Attach the trailer to the tow vehicle. 2. Use the vehicle's parking brake and chock the wheels of the trailer to prevent rolling. 3. Disconnect the trailer battery ground cable before installation to avoid accidental shock and/or damage to the electrical system.
Disconnecting the battery ground cable before installation prevents accidental shock and/or damage to the electrical system during the installation process.
1. Attach trailer to tow vehicle and chock wheels. 2. Disconnect trailer battery ground cable. 3. Detach the drop leg by removing the lynch pin. 4. Position the drop leg beneath the coupler mounting hole with its foot on the ground. 5. Place the jack outer tube through the A-frame coupler hole and over the drop leg. 6. If a Plunger Pin Kit is included, install it per its instructions. 7. Attach the jack using three 3/8" bolts and nuts with lock and star washers, torqued to 15–20 ft-lbs. 8. Route the black wire lead along the trailer to the battery using cable ties. 9. Connect the wire lead to the positive (+) terminal of the battery. 10. Reconnect the battery ground cable. 11. Test operation by pressing EXT and RET switches and checking the LED light. 12. Reattach the drop leg using the lynch pin. 13. Retract the jack completely.
Position the drop leg beneath the coupler mounting hole with the foot of the drop leg on the ground. The drop leg supports the jack outer tube as it is placed through the A-frame coupler hole. After installation is complete and tested, reattach the drop leg to the inner tube of the jack using the lynch pin or plunger pin assembly.
Route the black wire lead from the plastic cover along the trailer to the battery. Attach the wire lead to the trailer using cable ties or equivalent to secure it in place. Then connect the wire lead directly to the positive (+) terminal of the battery.
The Plunger Pin Kit Assembly is an optional component that may be included with the jack. If included, it must be installed before completing the main jack mounting. To install: align the grooves of the jack tube and plunger pin assembly together and slide over the bottom of the jack tube; retract the plunger pin and slide the assembly onto the jack, ensuring the pin passes through both sides of the tube; install the drop leg; tighten the clamp to the jack and torque to 15–20 ft-lbs; ensure the plunger pin and drop leg operate freely; then reattach the jack to the trailer per the main installation instructions.
Torque the three 3/8" bolts to 15–20 ft-lbs. Lock washers must be placed between the bolt head and the top of the jack mounting bracket, and star washers must be used to ensure metal-to-metal contact between jack and coupler for proper grounding.
With the plunger pin through both holes of the jack tube, tighten the clamp to the jack and torque to 15–20 ft-lbs. After tightening, ensure the plunger pin and drop leg operate freely.
Route the black wire lead from the plastic cover along the trailer to the battery, securing it with cable ties or equivalent. Connect the wire lead directly to the positive (+) terminal of the battery. The jack has a built-in circuit breaker which automatically trips and resets. After connection, reconnect the battery ground cable.
Yes. The jack has a built-in circuit breaker which automatically trips and resets. This protects the electrical system from overload.
The maximum rated capacity is stamped on markings or decals on the product itself. Refer to these markings to obtain the rated capacity for your specific jack. Never exceed the maximum rated capacity. If uncertain, contact Cequent Performance Products at 800-604-9466 or www.cequentperformanceproducts.com.
Operator and bystanders must never position any part of their body under or on the path of any portion of the product or the load being supported or moved. Do not allow children to play on or around the product or the load. Secure the load, vehicle and trailer from rolling by blocking the wheels when operating the jack or coupling the trailer. The jack is designed for vertical loading only; excessive side forces may cause jack failure and must be avoided.
No. Never attempt to adjust the drop foot or drop leg when there is any load on the jack. Adjustments must only be made when the jack is not supporting a load.
When using the drop foot or drop leg, make certain the supplied pin (lynch pin or plunger pin) is fully inserted through both sides of the inner tube and the drop tube before using the jack. After adjusting the drop leg to the desired level, always reattach the pin assembly through both sides of the jack tube.
After installation, check for proper operation by pressing the motor switch marked "EXT" to extend the jack and "RET" to retract the jack. Also check that the light switch turns on the LED light located under the top cover of the jack. If both functions work, the installation is correct.
After checking for proper operation, reattach the drop leg to the inner tube of the jack using the lynch pin or plunger pin assembly. Then retract the jack completely before using the trailer.
The motor is sealed and maintenance-free. However, you must maintain the electrical system including the battery and charger (not included). Ensure all connections are tight and free of corrosion and that the jack is properly grounded with the coupler (metal-to-metal contact). Make sure the battery is fully charged prior to use. Periodically check mounting hardware for proper torque and tighten if necessary. If necessary, wash with mild soap and water and rinse thoroughly. Do not direct a high-pressure spray at the jack. Periodically oil the pins of the plunger pin assembly.
Periodically check mounting hardware for proper torque and tighten if necessary. The manual does not specify an exact interval; regular inspection before each use or at least monthly is recommended to ensure safety.
Periodically oil the pins of the plunger pin assembly to ensure smooth operation. After tightening the clamp, ensure the plunger pin and drop leg operate freely.
Always replace bent, broken, or worn parts before using the product. Use only Cequent Trailer Products' parts or parts of equal quality for repair. Replacement parts are available through Cequent Trailer Products' Customer Service Department at 1-715-693-1700 or 1-800-604-9466. Please specify the product model number.
No. Do not direct a high-pressure spray at the Powered A-Frame Jack. If necessary, wash with mild soap and water and rinse thoroughly.
Ensure the jack is properly grounded with the coupler through metal-to-metal contact. This is achieved by using star washers between the jack mounting bracket and the coupler when installing the three mounting bolts. Periodically check that all connections remain tight and free of corrosion.
Ensure the battery is fully charged prior to use. It is important to maintain the electrical system including the battery and charger (not included). Ensure all connections are tight and free of corrosion. The manual does not provide specific charging instructions or maintenance intervals; consult your battery and charger manufacturer for detailed guidance.
The jack is designed for A-frame couplers and can be positioned facing the tow vehicle or for side operation. For specific compatibility with your trailer, check the product markings or contact Cequent Performance Products at 800-604-9466.
Three 3/8" diameter, 1" long, grade 5 bolts and nuts; lock washers and star washers for proper grounding and mounting.
Yes. Disconnect the trailer battery ground cable before installation to prevent accidental shock and/or damage to the electrical system.
Route the black wire lead along the trailer to the battery and connect it directly to the positive (+) terminal. The jack has a built-in circuit breaker. Reconnect the battery ground cable after connection.
Refer to the stamped markings or decals on the product for the rated capacity. Never exceed this limit. Contact Cequent Performance Products at 800-604-9466 if uncertain.
Press the "EXT" switch to extend the jack and "RET" to retract it. Check that the LED light turns on using the light switch. If both work, installation is correct.
The motor is sealed and maintenance-free. Maintain the battery and electrical connections (keep them tight and corrosion-free). Periodically check mounting hardware torque. Oil the plunger pin assembly pins. Do not use high-pressure spray.
First, ensure the battery is fully charged. If power is lost entirely, remove the cap on top of the plastic cover and insert the manual override crank to raise or lower the jack manually. If the battery is charged and the motor switch does not respond, check that all electrical connections are tight and free of corrosion, and that the jack is properly grounded with the coupler (metal-to-metal contact). If the problem persists, contact Cequent Performance Products at 1-800-604-9466.
Check that the light switch is set to "ON". Verify that the battery is fully charged and all electrical connections are tight and free of corrosion. If the light still does not turn on, the LED or switch may be faulty. Contact Cequent Performance Products at 1-800-604-9466 for replacement parts.
After tightening the clamp on the plunger pin assembly to 15–20 ft-lbs, ensure the plunger pin and drop leg operate freely. If they are stiff, loosen the clamp slightly and check that the pin is properly aligned through both sides of the tube. Periodically oil the pins of the plunger pin assembly to maintain smooth operation.
Periodically check mounting hardware for proper torque and tighten if necessary. Using a torque wrench, retorque the three 3/8" bolts to 15–20 ft-lbs. Ensure lock washers are in place between the bolt head and the top of the jack mounting bracket, and that star washers are used to maintain metal-to-metal contact between jack and coupler for proper grounding.
Proper grounding requires metal-to-metal contact between the jack and coupler. Ensure that star washers are placed between the jack mounting bracket and the coupler, and that lock washers are placed between the bolt head and the top of the mounting bracket. Check that all mounting bolts are torqued to 15–20 ft-lbs and are tight. Inspect for corrosion on the coupler and jack surfaces and clean if necessary. If grounding is still poor, the coupler or jack may need replacement.
| Part Number | Description |
|---|---|
| 500190 | For Most 2,000 lbs. BULLDOG Round Jacks and BULLDOG Powered A-Frame Jacks, Pin Included, 5,000 lbs. Rated, Will Not Work with Pro Series Round Jacks and BULLDOG Round Jacks with Heavy Wall Inner Tubes |
| 500270 | For Square Jack, 2.0 in. Square Tube, Pin Included, 8,000 lbs. Rated |
| 500329 | Drop Leg and Pin |
| 500340 | Replacement Part, Drop Leg Pull Pin Assembly, 7/8 in. x 2.25 in. |
| 500377 | Drop Leg and Pin |
| Part Number | Description |
|---|---|
| 500190 | For Most 2,000 lbs. BULLDOG Round Jacks and BULLDOG Powered A-Frame Jacks, Pin Included, 5,000 lbs. Rated, Will Not Work with Pro Series Round Jacks and BULLDOG Round Jacks with Heavy Wall Inner Tubes |
| 500270 | For Square Jack, 2.0 in. Square Tube, Pin Included, 8,000 lbs. Rated |
| 500329 | Drop Leg and Pin |
| 500340 | Replacement Part, Drop Leg Pull Pin Assembly, 7/8 in. x 2.25 in. |
| 500377 | Drop Leg and Pin |
| Part Number | Description | Lift Capacity (lbs.) | Travel (in.) | Retracted (in.) | Extended (in.) | Clearance (in.) |
|---|---|---|---|---|---|---|
| 500199 | Black Cover, Includes Drop Leg | 4,000 | 22.00 | 9.75 | 31.75 | 21.00 |
| 500200 | White Cover, Includes Drop Leg | 4,000 | 22.00 | 9.75 | 31.75 | 21.00 |
| Replacement Parts | ||||||
| 500190 | Drop Leg and Pin Kit | |||||
| 500193 | Level Assembly and Screws | |||||
| 502003 | Manual Override Crank | |||||
| 500363 | Extend/Retract Switch for #500187, #500188, #500199 and #500200 | |||||
Ann
The staff was able to quickly assist me with locating the correct product I needed. Shipping was really fast. Item arrived in 2 days. Will be using TowUniverse again!!
May 22, 2023
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