GENERAL
4-8 / Seats, Seat Belts, and Safety Restraints
© 2020 Pierce Manufacturing Inc. All Rights Reserved.
The S4S actuator is located immediately behind the driver’s suspension seat. In the event of a side roll accident the
S4S unit deploys, pretensioning the seat belt and pulling the seat to its lowest position. The S4S is only effective
when you wear your seat belt. ALWAYS WEAR YOUR SEAT BELT.
Integrated Gas Pretensioner (IGP) / Integrated Belt Pretensioner (IBP)
Figure 4-3: Integrated Gas Pretensioner (IGP) / Integrated Belt Pretensioner (IBP)
POM0119
Seat belt pretensioner actuators are located at the base of the seat belt buckle cable in the first officer and crew cab
seating positions. In the event of a side roll accident, the IGP/IBP deploys at each non-suspension seat location.
The cable pretensioner retracts the cable and buckle assembly, removing up to five inches (120 mm) of slack from
the belt. The buckle pretensioner is only effective when you wear your seat belt. ALWAYS WEAR YOUR SEAT
BELT.
Inflatable Head Curtain (IHC)/Supplemental Restraint Air Bag (SRA)
Figure 4-4: Inflatable Head Curtain (IHC)/Supplemental Restraint Air Bag (SRA)
POM0122/1109
Keep hands and other objects clear of the deployment path of seat, seat belt, and suspension
components.
Keep hands and other objects clear of the retraction path of the seat belt buckle.
Pre-Deployment
Post-Deployment
Mounted to seat
back
Integral to seat
bolster
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