Ram Promaster Seat Base Lagun Mount Installation

• Phillips Screwdriver — For the M8 Lagun bracket bolts
• 15mm Wrench or Socket — For the M8 Lagun bracket nuts
• 17mm Deep Socket — For the M10 seat base bolts
• 17mm Wrench — Used with the deep socket for the M10 seat base bolts
• Needle Nose Pliers — Backup if wrench is too wide for seat base opening

Decide whether you are installing on the driver or passenger side. The mount is reversible — it works on either seat base. The Lagun plate side of the mount should face toward the B-pillar, with the two M10 bolt slots positioned on the outboard side of the seat base.

Tip: Fully assemble and torque the Lagun bracket to the mount on a workbench before taking it to the van. This makes alignment much easier.

Attach the Lagun Bracket

• Standard/Wide Bracket: Place the bracket against the mount face and align the four corner holes. Insert M8 bolts through the bracket and mount. Hold the back of each nut with a Phillips screwdriver and tighten the front with a 15mm wrench or socket. Fully torque.
• Narrow/Sliver Bracket: Align the bracket to the three holes along the outboard side of the mount. Insert M8 bolts through the bracket and mount. Hold the back of each nut with a Phillips screwdriver and tighten the front with a 15mm wrench or socket. Fully torque.

1. Take the two included M10 bolts and insert them backwards through the seat base slots from the inside — stems pointing outward like studs.
2. Slide the mount assembly over the two protruding bolt stems.
3. Place a washer onto each stem, then thread on the M10 nuts finger tight.

Tightening the Seat Base Bolts

Insert the 17mm deep socket down into the seat base opening to access the back of the bottom bolt, and tighten the front with the 17mm wrench. For the top bolt, switch — use the 17mm wrench on the back and the deep socket on the front. If your wrench is too wide to fit behind the top bolt, hold the bolt with needle nose pliers while tightening from the front with the deep socket.

Note: Some sockets are too wide to fit into the seat base opening entirely. If yours won't fit, hold the back of the nut with needle nose pliers while tightening the front with a 17mm wrench.

Slide your Lagun arm onto the bracket, adjust to your desired height, and you're ready to go.

Questions? Reply directly to your order confirmation email or use our contact form.