Safety 1st onBoard 35 LT Car Seat
Parts of the Child Restraint
Front View
- A. Carry Handle
- B. Canopy
- C. Head Rest (see page 29)
- D. Vehicle Belt Path Guide (when used without the base)
- E. Adjustable Base
- F. Harness Release Lever (through opening in pad)
- Harness Adjustment Strap
- H. Recline Foot Release Button
Back View
- I. Carry Handle Adjustment Button
- J. Rear-Facing Level Line
- K. Shell (child restraint)
- L. Base Release Handle
Harness System Detail
- M. Shoulder Harness Slots
- N. Chest Clip
- 0. Harness Strap
- P. Buckle
- Q. Hip Harness Slots
- R. Buckle Slots
Bottom of Child Restraint
- A. Base Release Handle
- B. Shoulder Harness Slots
- C. Stroller Attachment Pins
- D. Harness Strap
- E. Splitter Plate
- F. Harness Adjustment Strap
- G. Instruction Manual Storage
- H. Buckles Metal Retainer
Top of Base
- I. Base Belt Path
- J. Lock Bars
- K. Lower Anchor Belt
- L. Base Alignment Slots
- M. Lower Anchor Belt Storage
Prepare Child Restraint to Fit Your Child
- Fully Loosen Harness Straps
Push down on the harness release lever (through the opening on the front of the seat pad) while pulling out on the harness straps as shown. - Unbuckle the Harness
Press in on the red button. Pull buckle tongues out. - Release the Chest Clip
Press on chest clip release button and pull apart. - Place the Child in the Child Restraint to Determine Proper Harness Fit
The child’s bottom and back should be flat against the child restraint. See page 5 for fit guidelines.
How Does Your Child Fit?
Use the guidelines below to determine if the buckle and harness strap are in the right place for your child.
REAR FACING
Buckle Position
Start in the 1st slot and adjust outward as your child grows. Buckle should be used in the slot closest to your child. It should not be underneath or behind your child.
Harness Strap Position
Always choose the shoulder harness slots that are closest to your child’s shoulder height. Harness strap MUST be at or slightly below shoulders. If the lowest shoulder harness slots are above the child’s shoulders, do not use this child restraint.
Changing Position of Buckle
- Unbuckle Harness
Press in on the red button. Pull buckle tongues out. - Turn Seat Over
Locate the buckle’s metal retainer on the bottom of the shell. - Rotate the Metal Retainer and Push It Up Through the Shell and Pad
- From the Top of the Seat, Pull the Buckle Out of the Shell and Pad
- Insert Buckle’s Metal Retainer into Slot Closest to Child. Buckle MUST face out.
- Pull the Metal Retainer Completely Through the Pad and Shell
- Check Buckle
Pull up on the buckle to make sure it is secured. The buckle MUST not pull out.
WARNING: Failure to place the buckle’s metal retainer completely through the pad and shell can result in serious injury or death.
Changing Position of Shoulder Harness Strap
- Fully Loosen Harness Straps
Push down on the harness release lever (through the opening on the front of the seat pad) while pulling out on the harness straps as shown. - From the Back of the Seat, Remove the Harness Strap Loops From the Splitter Plate
- Pull Harness Strap Out of Shoulder Harness Slots
- Read the Harness Strap Into the Correct Shoulder Harness Slots For Your Child
- Attach 1st Harness Strap Loops to Splitter Plate
Sewn ends of the harness strap loops MUST face towards you. DO NOT twist the harness strap or the harness adjustment strap. Make sure the same harness strap loops are fitted COMPLETELY ON both sides of the splitter plate.
WARNINGS: Make sure that the harness height is correct for your child’s size. Do not use this child restraint rear unless the top of your child’s head is at least 1 in. (2.5 cm) below the top of the child restraint. Failure to follow these steps can result in serious injury or death.
Harness System Adjustments for Smaller Infants
- With Buckle in the 1st Slot as Shown,
Turn the Seat Over. If you need to move the buckle to the 1 st slot, see pages 6-7. - From the Bottom of the Seat, Pull the Metal Retainer Towards You and Push It Up into the 2nd Slot As Shown
- From the Top of the Seat, Lift the Pad Up and Lay the Metal Retainer Flat Against the Shell As Shown
- Replace Pad and Check Buckle
Pull up on the buckle to make sure it is secured. The buckle MUST not pull out. - Fully Loosen Harness Strap
Push down on the harness release lever (through the opening on the front of the seat pad) while pulling out on the harness straps as shown. - From the Back of the Seat, Remove the Harness
Strap Loops From Splitter Plate - Pull Harness Strap Out of Shoulder Harness Slots
- Read the Harness Strap Into the Correct Shoulder Harness Slots For Your Child
- Attach the 2nd Harness Strap
Loops to Splitter Plate Sewn ends of the harness strap loops MUST face towards you. DO NOT twist the harness strap or the harness adjustment strap. Make sure the same harness strap loops are fitted COMPLETELY ON both sides of the splitter plate.
WARNINGS: Make sure that the harness height is correct for your child’s size. Do not use this child restraint unless the top of your child’s head is at least 1 in. (2.5 cm) below the top of the child restraint. Failure to follow these steps can result in serious injury or death.
Securing a Child in a Child Restraint
- Place the Child in a Child Restraint
The child’s bottom and back should be flat against the child restraint. Position the harness strap over the child’s shoulders and upper thighs. - Buckle Harness
Push buckle tongues into buckle until you hear them “click.” Pull up on the harness strap to make sure the buckle is locked. - Close Chest Clip
Insert the right half of the chest clip into the left half and snap together. - Tighten Harness
Pull on the harness adjustment strap to tighten the harness snugly. - Position Chest Clip
The chest clip must be placed at mid-chest (even with armpits) and away from the child’s neck. - Check Harness Tightness
Try to pinch the harness at the shoulders vertically between the index finger and thumb as shown. If your fingers slip off, the harness is tight enough. If you can pinch the harness strap, tighten it more. The harness straps should be snug throughout their length. A snug strap should not allow any slack. It lies in a relatively straight line without sagging. It does not press on the child’s flesh or push the child’s body into an unnatural position.
WARNINGS: Failure to fasten and tighten the harness system correctly may allow the child to be ejected from the child restraint in a crash or sudden stop, causing serious injury or death. Do not mistake comfort for safety. The Harness system must be snugly adjusted. DO NOT put snowsuits or bulky garments on your infant when placing them in the child restraint. Bulky clothing can prevent the harness straps from being tightened properly.
To Remove Child From Child Restraint:
- Loosen Harness Strap
- Unbuckle the Harness
- Release the Chest Clip
- Remove Child
Removing and Installing the Child Restraint to the Base
- To Remove Child Restraint from Base
From the back of the child restraint, slide the base release handle up and lift the child restraint out of the base. - To Attach Child Restraint to Base
Align the slots on the side of the child restraint with the lock bars in the base. Push down firmly on the carry handle and front of the child restraint to lock it to the base. You will hear a “click” when it is locked. Pull up on the front two corners of the child restraint by the infant’s feet to make sure it is locked to the base.
WARNINGS: When installing with a base, only use this car seat with a compatible OnBoard 35 LT base. Failure to use a correct base can cause serious injury or death. Failure to securely attach a child restraint to the base can result in serious injury or death.
Adjusting the Base
To Lower the Base Foot
Push in on the foot release button and pull the foot all the way down. Lock the foot on the release button as shown.
Lock the foot on the release button as shown.
To Store Base Foot
Pull the foot down and press in on the release button. Push the foot up into the base to the locked position.
Carrier Use
To Adjust the Carry Handle
Squeeze both adjustment buttons on each side of the carry handle. Rotate up or down to the desired location. Release buttons. Make sure both carry handle adjuster buttons are in the locked position. The carry handle MUST be upright AND locked when carrying and when installed in the vehicle.
WARNING: DO NOT use in the seating area or across the top of shopping carts.
WARNING: Read ALL instructions before using a child restraint as a carrier.
- NEVER use a carrier unless the child is properly secured. Use only as a carrier by children weighing 4-35 pounds (1.8-15.9 kg) and 32 inches (81.3 cm) or less.
- NEVER leave a child unattended. Always keep the child within arm’s reach.
- Suffocation Hazard: Infant carrier can roll over on soft surfaces and suffocate the child. NEVER place a carrier on beds, sofas, or other soft surfaces.
- Strangulation Hazard: Children have STRANGLED in loose or partially buckled harness straps. Fully restrain the child even whena carrier is used outside the vehicle.
- Fall Hazard: The Child’s movement can slide the carrier. NEVER place a carrier near the edges of countertops, tables, or other elevated surfaces.
- Do not use the carrier if it is damaged or broken, or if any parts are missing.
Removing the Harness System
Only remove the harness system to clean the seat pad. To remove accessories, see page 29.
- Fully Loosen Harness Strap
Push down on the harness release lever (through the opening on the front of the seat pad) while pulling out on the harness straps as shown. - From the Back of the Seat, Remove the Harness Strap Loops From the Splitter Plate
- Pull Harness Strap Out of Shoulder Harness Slots
- Unthread Chest Clip
- Unthread Buckle
Do not unbuckle the buckle. - Pull Harness Strap Out of Seat
- Turn Seat Over
Locate buckle’s metal retainer on the bottom of the shell. - Rotate the Metal Retainer and Push It Up Through the Shell and Pad
- From the Front of the Seat, Pull the Buckle Out of the Shell and Pad
Removing Seat Pad for Cleaning
You must remove the harness system in order to remove the pad. See pages 19-21.
- Release the Pad Tabs
Pull down on the pad and pull the tab out of the shell. Repeat for the other side. - Remove the Elastic Straps
Pull the elastic strap off the belt path guide as shown on both sides. Repeat for the other side. - Pull the Pad off the Tabs from
Top of Shell - Remove the Pad from the
Bottom of Shell: Remove the pad from the shell.
WARNINGS: Do not use a child restraint without the seat pad. Failure to do this can result in serious injury or death. Cleaning Pad and Accessories: Machine wash separately with cold water on a gentle cycle. Do not use bleach. Tumble dry separately for 10-12 minutes on low heat. Remove immediately. To clean the canopy, hand wash using warm sudsy water. Line dry.- Cleaning Harness
Strap: Spot clean using warm sudsy water and a damp cloth. - Replacing Pad
Starting from the top of the child restraint, slip the pad on the shell. Push pad tabs at the top of the shell through slots in the pad. Pull the harness adjustment strap through the slot in the pad. Wrap the pad around the bottom of the shell. Attach the tabs on the sides to the shell. Attach elastic straps to the belt path guide. Install the harness system. See pages 24-26.
- Cleaning Harness
Installing the Harness System
- Insert Buckle’s Metal
Retainer into the Slot Closest to the Child Buckle MUST face out. - Pull Metal Retainer
Completely Through Pad and Shell - Check Buckle
Pull up on the buckle to make sure it is secured. The buckle MUST not pull out. - Rethread Harness Strap
With the sewn end of the harness strap loop facing the buckle, thread the harness strap down through the hip harness slot. - Pull Up Front of Seat Pad
- Weave Harness Strap
In and Out of Shell As Shown - Make the Harness Strap Even
Sewn ends of harness strap loops MUST face each other. - Thread Buckle and Chest Clip
Harness strap ends go through the back of buckle tongues and through the chest clip front to back as shown. - Thread Harness Strap Cinto Correct Shoulder
Harness Slots For Your Child - Attach 1st Harness
Strap Loops to Splitter Plate. Sewn ends of the harness strap loops MUST face towards you. DO NOT twist the harness strap or harness adjustment strap. Make sure the same harness strap loops are fitted COMPLETELY ON both sides of the splitter plate.
WARNINGS: The Harness system must be installed correctly. Failure to follow these steps can result in serious injury or death.
Accessories on Select Models
Head Rest
To remove the headrest, unbuckle the harness. Pull the buckle down through the slot in the headrest. Slide the headrest out from behind the harness straps.
Child Restraint Use
- Never take your child out of the child restraint while the vehicle is moving.
- Never leave a child unattended.
- Placing your child in a hot child restraint may result in burns.
- Do not use a child restraint with damaged or missing parts.
- Do not use cut, frayed, or damaged harnesses.
- Do not substitute parts or try to modify the child restraint in any way.
- Do not lubricate buckles and fasteners.
- Do not use any child restraint accessory except those approved by Dorel Juvenile Group.
- Never allow any child to play with this child restraint; it is not a toy.
- Do not remove or cover up any of the warning labels or other labels on the child restraint.
- Read all instructions for additional warnings.
- On the side of the child restraint, there is a date of manufacture label. Do not use this child restraint more than 8 years after the date of manufacture.
- When installing with a base, only use this car seat with a compatible OnBoard 35 LT base. Failure to use a correct base can cause serious injury or death.
Installation in Vehicle
Check the vehicle belt or lower anchor belt before each use. Use only if the belt is tightened properly and locked securely in place. This child restraint should be securely belted in the vehicle even when not in use. In a crash or sudden stop, an unsecured child restraint could injure occupants. Do not use a child restraint that has been in a crash. You must get a new child restraint.
Vehicle Seating Position
- Never place a child rear-facing in a seating position with an active frontal airbag.
- Check the vehicle owner’s manual for more information about air bag/child restraint use.
- Use the child restraint only on vehicle seats that face forward.
- Do not use on seats that face the sides or rear of the vehicle.
- Use the center seating position if possible.
- For vehicles without a back seat, refer to your vehicle owner’s manual.
- If you are not sure where to place the child restraint in your vehicle, consult your vehicle owner’s manual, contact Dorel Juvenile Group Consumer Care Department, or visit your local Child Passenger Safety Inspection Station. Go to http://www.safercar.gov/cpsApp/cps/index.htm to find your closest station. Children are safer when properly restrained in rear seating positions than in front seating positions. According to National Highway Traffic Safety Administration information, children in rear seating positions are statistically safer, whether you have air bags, advanced airbags, or no airbags at all.
To avoid your child being seriously burned, take the following precautions:
- Park in the shade or where the un does not directly hit the child restraint.
- Cover the child restraint with a sheet or blanket when not in use.
- Check for hot seat and buckles before placing the child in the child restraint.
To help protect your vehicle seat’s upholstery from damage, use a single-layer towel underneath and behind the child restraint.
Registration and Safety Notices
Please complete the postage-paid registration card that came with your child restraint, and send it to us. Child restraints could be recalled for safety reasons. You must register this restraint to be reached in a recall. Send your name, address, email address if available, the restraint’s model number, and manufacturing date to:
Dorel Juvenile Group, Inc. Consumer Care Department P.0. Box 2609 Columbus, IN 47202-2609 or call 1-800-544-1108
For recall information, call the U.S. Government’s Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153), or go to http://www.NHTSA.gov.
Troubleshooting
- Locate a Child Safety Seat Inspection Station for hands-on training on how to use your child restraint: Visit your local Child Passenger Inspection Station or go to http://www.safercar.gov/cpsApp/cps/index.htm to find your closest station.
- If the child restraint buckle or harness release lever sticks, or you cannot get the straps tight enough around the child: DO NOT LUBRICATE. Check around the lever and retractor for dropped food, sticky spilled drinks, dirt, leaves, etc. Clean with warm water and/or remove the object with tweezers. If you cannot get the harness to adjust and remain tight with the buckle securely locked, do not use the child restraint.
- If your harness twists, straighten the harness each time you put your child in the child restraint to help prevent twisting. Lock the buckle and tighten the harness so it will be ready for the next use.
Warranty
Dorel Juvenile Group, Ic. (DJ6) warrants this product to the original retail purchaser as 0lows: This product is warranted against defective materials or workmanship for one year from the date of original purchase. An original receipt is required to validate your warranty. DJG will, at its option, provide replacement parts to replace this product. DUG reserves the right to substitute if the part or model has been discontinued. To make a claim under this warranty, you may write to DJG, Consumer Care Department, P.O.. Box 2609, Columbus, IN 47202 2609; or call 1-800-544-1108 from 8:00 a.m. to 6:00 p.m. EST Monday through Thursday and from 5002. 030 pm. on Rida. Proof of purchase is required, and shipping charges are the responsibility of the consumer. Warranty Limitations: This warranty does not include damages which arise from misuse or abuse of is product
Limitation of Damages: The warranty and remedies os set forth at exclusive and in lieu of all others, oral not written, expressed, or implied. In no event will DJG or the dealer sling this product be liable 1 you for any damages, including incidental or consequential damages, arising out of the use or inability 10 use this product Limitation of warranties and other warranty terms and state law rights: Any implied warranties, including implied warranties of the merchantability and fitness for a particular purpose, shall be limited 10 the duration and terms of the express written warranty. Some states do not allow limitations as to how long an implied warranty lasts or the exclusion of imitation of incidental or consequential damages, so the above limitations may not apply 10 you. This warranty gives you specific legal rights, and you may have other rights, which vary from state 0 state.. Neither DJG nor the manufacturer sling that product authorized any person to create for it any other warranty, obligation, or liability in connection with this product.
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Safety 1st onBoard 35 LT Car Seat-FAQs
Where are Safety 1st car seats made?
Safety 1st is owned by Dorel Juvenile (Canada), but some models, including the onBoard 35 LT, are made in the USA (Columbus, Indiana).
What is the correct angle for a rear-facing car seat?
For newborns, the seat should recline at 45 degrees. The onBoard 35 LT has a built-in level indicator for proper adjustment.
How long does the Safety 1st car seat last?
Most Safety 1st car seats expire 6–10 years after manufacture. Check the expiration label on the seat.
What is the difference between the KeyFit 30 and KeyFit 35?
(While this refers to Chicco, a common comparison for Safety 1st seats):
KeyFit 30 – Up to 30 lbs
KeyFit 35 – Up to 35 lbs, plus no-rethread harness & UPF 50+ canopy
How do I clean the onBoard 35 LT car seat?
Harness & fabric: Remove and hand-wash with mild soap.
Plastic shell: Wipe with a damp cloth.
Do not machine wash or submerge straps.
Can I add extra padding under the car seat?
No. Only use rolled towels under the base (if needed for leveling). Never place padding under the baby or behind the harness.
What is ISOFIX/LATCH?
A secure attachment system using metal anchors in the car. The onBoard 35 LT base supports LATCH or seat belt installation.
How do I adjust the harness height?
The onBoard 35 LT has 4 harness positions—move the straps to sit at or just below the baby’s shoulders for rear-facing use.
What is a 5-point harness?
A safer restraint system with five attachment points (two shoulders, two hips, one crotch) to keep the child secure.
Can I use this car seat on an airplane?
Yes! The onBoard 35 LT is FAA-approved for air travel (check airline policies).
When should I stop using an infant car seat?
When your baby reaches:
35 lbs (weight limit)
32 inches (height limit)
Head within 1 inch of the top