Replacement inner tube stem for Shocker Gooseneck Surge® Air Hitch.
Only fits the Shocker gooseneck air hitch.
Choose round or square.
Choose hitch pin hole style.
Bolts into the Shocker gooseneck air hitch frame assembly.
Includes 2 Brass Bushings and Grease Zerk.
Textured Matte Black Powder Coat Finish.
Replacement inner tube stem for Shocker Gooseneck Surge® Air Hitch. This is only for the Shocker gooseneck air hitch. Choose round or square and choose hitch pin hole style. Bolts into the Shocker gooseneck air hitch frame assembly. Made by Shocker Hitch® USA in Jamestown, ND. Includes 2 brass bushings and grease zerk.
Quick Install: On a level surface, measure coupler tube bottom to trailer frame sleeve bottom, transfer measurement to Shocker Hitch. Remove original coupler (inner) tube; loosen set bolt(s), pull pin, slide out. Insert Shocker Hitch into trailer’s outer tube, reinstall pin, and set bolt(s). NOTE: Standard red frame: air bag faces trailer rear (Figure 1). 9″ offset black frame: air bag faces vehicle cab/trailer front (Figure 2). Ensure hitch sits straight and parallel with trailer (Figures 3-4). Torque locking set bolt(s) to trailer manufacturer’s recommended specifications or 125 ft. lbs. Before hooking up, lubricate coupler u-bolt and gooseneck ball.
For proper use of Shift Lock coupler, see “How To Use Shift Lock Coupler” section.
Shocker Gooseneck Surge Air Hitch Installation
Top Crank HandleQuick Install: Remove 3/8″ bolt and handle assembly. Loosen set bolts and remove existing coupler stem. Transfer bearing and 3/8″ washer to Shocker Hitch stem. Grease stem threads generously, slide into trailer until engaged, tighten set screws, add 3/8″ washer to exposed crank stem. Reinstall crank handle with 3/8″ bolt before vehicle hook-up. Hook up trailer and adjust coupler to level trailer.Note: Bulldog brand couplers require an additional 3/8″ washer (supplied with Shocker Hitch). Torque locking set bolt(s) to trailer manufacturer’s recommended specifications or 125 ft. lbs. Before hooking up, lubricate coupler u-bolt and gooseneck ball.
For proper use of Shift Lock coupler, see “How To Use Shift Lock Coupler” section.
Provided 3/8″ washer for top crank goosenecks.
Shocker Top Crank Handle Gooseneck Surge Air Hitch Installation
To connect: Move handle to unlocked position (Figure 15), lower trailer ontoo ball (Figure 16), move handle to locked position, insert quick clip pin. Check Lock: u-bolt should stick out 1″ from coupler rear when locked (Figure 17). If you do NOT see this, repeat stems 1 and 2 until u-bolt is visible from rear of coupler.
Manual lock option available for additional security or if Shift Lock handle is damaged (Figure 18).
Figure 17: Shift Lock coupler in correct locked position 1″ of the u-bolt stick out.
Figure 18: Optional manual lock pin on back of u-bolt (driver’s side).
How To Use Shift Lock Coupler
Start at 15 PSI. Test drive and adjust in 5 PSI increments until optimal. High winds may require added PSI. NEVER exceed 100 PSI in air bag, this will damage air bag. Grease hitch ball and pivot bolt regularly using the grease zerk on base of stem. Recommended to grease every 6-12 months based on usage to reduce wear.
Setting Air Pressure & Maintenance
Hitch must rotate at an 18″ radius around the ball to prevent contact with items in bed (red frame).
Hitch must rotate at an 16″ radius around the ball to prevent contact with items in bed (black offset frame).
Top View: Recommended that the Shift Lock coupler have a minimum clearance of 12″x12″ for flat beds.
Rear View: Recommended that the distance from the top of the bed to the top of the ball be a maximum of 2″ for flat beds.
Shocker Gooseneck Surge Air Hitch & Coupler Dimensions Diagram Guide
Shocker Gooseneck Surge Air Hitch with 9-Inch Offset Extension Coupler Diagram
Round Gooseneck Stem Angle & Sizing Guide (Pin Hole Can Be Straight or Angled – Round Stem Can Be 100MM (3-15/16″) or 4″)
Additional Information – Clearance & Diagrams
Installation Issues? Contact us!
We want you to have the best possible towing experience with your product and proper installation is important. If you need help, we are here for you. Just give us a call at 701-707-2666 or use our contact us form. You can also look up the items product page on our website and view the installation tab. Most products on our website have a set-up guide and installation video.
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**PLEASE NOTE THAT MOST INSTALLERS REQUIRE PRODUCTS TO BE PURCHASED DIRECTLY FROM THEIR STORE - PLEASE CONTACT THE INSTALLER DIRECTLY BEFORE PURCHASING. SHOCKERHITCH OFFERS NEXT-DAY DELIVERY TO MOST INSTALLERS.****PLEASE NOTE THAT MOST INSTALLERS REQUIRE PRODUCTS TO BE PURCHASED DIRECTLY FROM THEIR STORE - PLEASE CONTACT THE INSTALLER DIRECTLY BEFORE PURCHASING. SHOCKERHITCH OFFERS NEXT-DAY DELIVERY TO MOST INSTALLERS.**
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