ISRI Premium High Back Seat

ep3 dm 7.04.

Note: The seat should only be adjusted when the vehicle is parked with the park brake on.

The seat is designed to hold a maximum weight of 330 lb.

The ISRI Premium seat has nine different features; the controls are shown in Fig. .

  1. Backrest Tilt

  2. Back Support

  3. Height Adjustment

  4. Isolator Adjustment

  5. Fore/Aft Isolator

  6. Seat Extension

  7. Fore/Aft Slide

  8. Seat Tilt Lever

Fig. 1, ISRI Premium High Back Seat

  1. Backrest Tilt: Pull the handle out completely and lean back or forwards to adjust the backrest tilt. Release the handle when the correct position is achieved. The backrest has a 52 degree range of movement.
    When adjusted, the backrest inclination should allow the driver to reach the steering wheel with angled arms.
  2. Back Support: There are two switches that control the back areas of the seat. Making changes to a driver's sitting position from time to time helps prevent driver fatigue and improves posture.
    1. Lumbar (Lower) Back Support: Press the forward button to inflate the cushion, highlighted in Fig. , to increase support at the lower back. This moves the driver's spine into a double S shape and decreases pressure on the spine.

      Fig. 2, Lower Back Support

    2. Upper Back Support: Press the back button to inflate the cushion, highlighted in Fig. , to increase support at the mid-back region. This can help prevent the driver from sitting in a slouched, hunched, or hollow-back position.

      Fig. 3, Upper Back Support

  3. Height Adjustment: Pull or push the handle to adjust the seat height.
    Adjust the seat so the driver's feet can move each pedal through its full range of motion without fully stretching out the driver's legs or using force.
  4. Damper Adjustment: Move the lever down to increase damping on rough roads, or up to decrease damping on flat roads.
    The damper protects the driver's spine by absorbing vertical vibrations and shocks. It should be adjusted down far enough that the driver's feet never lose contact with the pedals. In general, heavier drivers won't have to adjust the lever up.
  5. Fore/Aft Isolator: Rotate the isolator lever to the left to lock the isolator, or to the right to allow horizontal movement.
    Damping horizontal shocks can be helpful with driving off-road or pulling a tank trailer.
  6. Seat Extension: Pull the lever to move the seat cushion forwards or back. The cushion moves up to 2-3/8 inches (60 mm) in 3/8-inch (10-mm) increments. Releasing the lever locks the cushion in place.
    Adjust the length of the seat cushion until there is space for three fingers between the cushion's front edge and the back the driver's knee. This helps to help improve circulation in the lower legs.
  7. Fore/Aft Slide: Pull the lever to unlock the seat and slide it forward or back. Release the lever to lock the seat in position.
    Adjust the seat so that reaching and pressing the pedals requires no effort and all dashboard controls are within easy reach.
  8. Seat Tilt: Pull the lever and add or reduce weight on the front area of the seat cushion to move it into one of three positions. Release the lever to lock the seat into position.
    The tilt of the seat, along with the tilt of the backrest and the contour of the seat cushion, affects the amount of pressure placed on the underside of the thighs and the back.
  9. Armrest Tilt: To adjust the armrest angle, tilt the armrest to the highest position, then down to the lowest position, then to the desired position.
    The armrest should be at an angle where the elbows lay lightly on it; this helps to relax the muscles in the shoulder and neck.
Note:
Parent topic: Seats and Restraints
Document Number: 0000087449
Manual Publication Date: 2024-03-21
Topic Publication Date: 2025-02-13