® EN Invacare® Crossfire™T7A Wheelchair User Manual DEALER: This manual MUST be given to the user of the product. USER: BEFORE using this product, read this manual and save for future reference.
© 2010 Invacare Corporation. All rights reserved. Republication, duplication or modification in whole or in part is prohibited without prior written permission from Invacare. Trademarks are identified by ™ and ®. All trademarks are owned by or licensed to Invacare Corporation or its subsidiaries unless otherwise noted. Natural Fit is a registered trademark of Three Rivers. Spinergy is a registered trademark of Spinergy, Inc. 3-in-1 oil is a registered trademark of American Home Products Corporation.
CONTENTS 1 GENERAL 6 2 Symbols .................................................................................................................................................................................................................................................... 6 Limited Warranty .....................................................................................................................................................................................................................
CONTENTS 6 FOOTREST 31 7 Adjusting/Replacing Standard Footrest ........................................................................................................................................................................................... 31 Replacing/Adjusting Optional Adjustable Angle Footrest...........................................................................................................................................................
CONTENTS Replacing Quad-Release Axles.......................................................................................................................................................................................................... 64 Adjusting Quad-Release Handles ..................................................................................................................................................................................................... 64 Handrim Replacement .................
1 GENERAL 1 General 1.1 Symbols Warnings Signal words are used in this manual and apply to hazards or unsafe practices which could result in personal injury or property damage. See the information below for definitions of the signal words. DANGER WARNING CAUTION ! Danger indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
1 GENERAL 1.2 Limited Warranty PLEASE NOTE: THE WARRANTY BELOW HAS BEEN DRAFTED TO COMPLY WITH FEDERAL LAW APPLICABLE TO PRODUCTS MANUFACTURED AFTER JULY 4, 1975. This warranty is extended only to the original purchaser/user of our products. This warranty gives you specific legal rights and you may also have other legal rights which vary from state to state.
2 SAFETY 2 Safety The safety section contains important information for the safe operation and use of this product. 2.1 General Guidelines ! WARNING DO NOT use this product or any available optional equipment without first completely reading and understanding these instructions and any additional instructional material such as owner’s manuals, service manuals or instruction sheets supplied with this product or optional equipment.
2 SAFETY When changes to the left hand column occur, follow across the chart and refer to the ✓ procedure to maintain the proper stability, safety and handling of the wheelchair. ● FOOTREST POSITION ● CAMBER TUBE (COG) ✓ BACK ANGLE BACK UPHOLSTERY Part No 1167484 USER CONDITION SEAT ANGLE BACK UPHOLSTERY Wheelchair Tie Down Restraints Invacare recommends that wheelchair users not be transported in vehicles of any kind while in wheelchairs.
2 SAFETY WARNING Repair and Service Information Unless otherwise noted, all service and adjustments should be performed while the wheelchair is unoccupied. Operating Information To determine and establish your particular safety limits, practice bending, reaching and transferring activities in several combinations in the presence of a qualified healthcare professional before attempting active use of the wheelchair. DO NOT attempt to reach objects if you have to move forward in the seat.
2 SAFETY WARNING Check all Allen screws that secure the footrest/raised footrest system to the wheelchair frame before using the wheelchair, especially if engaging in any contact sport. Anti-tippers MUST be used at all times. When outdoors on wet, soft ground or on gravel surfaces, anti-tippers may not provide the same level of protection against tip over. Extra caution MUST be observed when traversing such surfaces.
3 OVERVIEW 3 Overview 3.1 Label Locations WARNING Detent balls should extend beyond the diameter of the axle bushing for a positive lock. Keep detent balls P/N 1026960 Rev D clean. Serial Number Label Location W EIG H T CAPACITY 250 LBS. (114 kgs.
3 OVERVIEW 3.
3 OVERVIEW 3.3 Typical Product Parameters All specifications are approximate.
3 OVERVIEW CROSSFIRE T7A BACK ANGLE FOLDING: -8°, -4°, 0°, +4°, +8° BACK UPHOLSTERY: U850 (Balistic Black) - Adjustable Tension by Straps Breathable Mesh (Black) Adjustable Tension by Straps Foldover SEAT UPHOLSTERY: Sail Cloth - Screw-On AXLE POSITIONS/CENTER OF GRAVITY: Range of Adjustability in both positions: Active Position: 3/4 to 4 inches Extended Position: -15/8 to 15/8 inches REAR WHEEL AXLE: Quick Release (Standard), Quad-Release or Titanium (Optional) REAR WHEEL CAMBER CAMBER TUBE: REAR
3 OVERVIEW CROSSFIRE T7A CASTERS CASTER SIZE: CASTER TYPE: 3, 4 or 5-inch Semi-pneumatic (Standard), Soft Roll or Lighted (Optional) ANTI-TIPPERS: Optional *WEIGHT: 17.8 lbs SHIPPING WEIGHT: 30 lbs WEIGHT LIMITATION: 250 lbs *16 x 16 w/ Spinergy wheels, Primo hi-pressure tires, screw - on seat upholstery, mesh back upholstery w/ adjustable tension & 4” semi-pneumatic casters are included in the weight.
4 SAFETY/HANDLING OF WHEELCHAIRS 4 Safety/Handling of Wheelchairs 4.1 Safety/Handling of Wheelchairs “Safety and Handling” of the wheelchair requires the close attention of the wheelchair user as well as the assistant. This manual points out the most common procedures and techniques involved in the safe operation and maintenance of the wheelchair. It is important to practice and master these safe techniques until you are comfortable in maneuvering around the frequently encountered architectural barriers.
4 SAFETY/HANDLING OF WHEELCHAIRS WARNING Invacare strongly recommends proceeding down ramps or slopes slowly to avoid hard braking or sudden stops. Be aware that carrying heavy objects on your lap while occupying the wheelchair may adversely affect the stability of the wheelchair, resulting in serious bodily injury to the user, damage to the wheelchair and surrounding property. This wheelchair has been designed to accommodate one individual.
4 SAFETY/HANDLING OF WHEELCHAIRS • • Lengthening the wheelbase will increase the stability and maintain standard maneuverability of wheelchair. Shortening the wheelbase will decrease the stability, increase the maneuverability and distribute additional weight onto the rear wheels.
4 SAFETY/HANDLING OF WHEELCHAIRS Reaching, Leaning, and Bending Forward Reaching, Leaning, and Bending Backwards FIGURE 2 Stability and Balance - Reaching, Leaning, and Bending - Forward/Backward 4.3 Coping with Everyday Obstacles Coping with the irritation of everyday obstacles can be alleviated somewhat by learning how to manage your wheelchair. Keep in mind your center of gravity to maintain stability and balance. 4.
4 SAFETY/HANDLING OF WHEELCHAIRS 4.5 Tipping WARNING DO NOT tip the wheelchair without assistance Do not let the wheelchair drop the last few inches to the ground. This could result in injury to the occupant. When tipping the wheelchair, an assistant should grasp the back of the wheelchair on a non-removable (non-detachable) part. Inform the wheelchair occupant before tilting the wheelchair and remind him/her to lean back.
4 SAFETY/HANDLING OF WHEELCHAIRS WARNING When lowering the front casters of the wheelchair, Do not let the wheelchair drop the last few inches to the ground. This could result in injury to the occupant and/or damage to the wheelchair. Roll the wheelchair backward and slowly lower the wheelchair in one continuous movement. DO NOT let the wheelchair drop the last few inches to the ground. This could result in injury to the occupant. Turn the anti-tippers so the wheels are facing down. 4.
4 SAFETY/HANDLING OF WHEELCHAIRS 5. The wheelchair should not be lowered until the last stair has been negotiated and the wheelchair has been rolled away from the stairway. 6. If necessary, rotate the anti-tippers so the wheels are facing down. Moving Down Stairs 1. If necessary, rotate the anti-tippers so the wheels are facing up. 2.
4 SAFETY/HANDLING OF WHEELCHAIRS 4.7 Escalators 4.8 WARNING DO NOT use an escalator to move a wheelchair between floors. Serious bodily injury may occur. Transferring To and From Other Seats WARNING Before attempting to transfer in or out of the wheelchair, every precaution should be taken to reduce the gap distance. Turn both casters parallel to the object you are transferring onto. Also be certain the wheel locks are engaged to help prevent the wheels from moving.
5 SAFETY INSPECTION 5 Safety Inspection 5.1 Every six months, take your wheelchair to a qualified technician for a thorough inspection and servicing. Regular cleaning will reveal loose or worn parts and enhance the smooth operation of your wheelchair. To operate properly and safely, your wheelchair MUST be cared for just like any other vehicle. Routine maintenance will extend the life and efficiency of your wheelchair. Clean upholstery with mild soap and water or spray disinfectant using a sponge.
5 SAFETY INSPECTION ❑ Ensure quick release axles and camber inserts are clean. ❑ Ensure camber bar mounting clamps are securely tightened. ❑ Ensure quick/quad release axles lock properly. ❑ Ensure no excessive side movement or binding when lifted and spun. ❑ Inspect handrims for signs of rough edges or peeling. ❑ Inspect spokes for bent or broken spokes. ❑ Ensure all spokes are uniformly tight. ❑ Clean upholstery and armrests.
5 SAFETY INSPECTION ❑ Inspect tires for flat spots and wear. ❑ If pneumatic tires check for proper inflation. Inspect/Adjust Monthly ❑ Ensure wheel locks DO NOT interfere with tires when rolling. ❑ Ensure that the casters are free of debris. ❑ Ensure pivot points are free of wear and looseness. ❑ Inspect upholstery fastening flaps to ensure they securely latch. ❑ Inspect seat positioning strap for any signs of wear. Ensure buckle latches.
5 SAFETY INSPECTION CASTER FLUTTERS X X X X 5.3 X X X LOOSENESS IN CHAIR SLUGGISH TURN OR PERFORMANCE X SQUEAKS AND RATTLES CHAIR VEERS LEFT Troubleshooting CHAIR VEERS RIGHT 5.2 SOLUTIONS Check tires for correct and equal pressure. X X Check for loose stem nuts. X X Check spokes and nipples. Check that both casters contact the ground at the same time.
5 SAFETY INSPECTION Suggested Maintenance Procedures 1. Before using your wheelchair, make sure all nuts and bolts are tight. 2. Check all parts for damage or wear and replace. 3. Check all parts for proper adjustment. 4. Keep quick/quad-release axles free of dirt and lint to ensure positive locking and proper operation. Refer to Adjusting Quick-Release Axles on page 63 or Adjusting Quad-Release Handles on page 64. 5.
5 SAFETY INSPECTION 6. Periodically adjust wheel locks in correlation to tire wear. Refer to Replacing/Adjusting the Wheel Locks on page 59. Tire wear is excessive if: • • • Pneumatic Tires - there is missing tread or the tires are bald. Urethane Tires - there are cuts, surface defects or the tires are loose on the rims. Rubber Tires - 30% or more of the tire has worn away. Invacare recommends that rear wheel tire/tube and caster tire/tube be replaced every five years. 7.
6 FOOTREST 6 Footrest WARNING After any adjustments, repair or service and before use, make sure all attaching hardware is tightened securely - otherwise injury or damage may occur. ALWAYS perform this procedure in the presence of an assistant. The position of the footrest, camber tube, seat angle, back angle, the tautness of the back upholstery as well as the user's condition are directly related to the wheelchairs stability.
6 FOOTREST WARNING The standard footrest has an open hoop. A footplate cover is recommended for wheelchair users that have leg spasticity or whose feet have a possibility of falling through the footrest hoop. A calf strap is provided with each wheelchair to prevent the feet from slipping backwards off of the footrest. Be sure the calf strap is secure when using the wheelchair. Adjusting the Footrest 1. Position new/existing footrest to desired height. 2.
6 FOOTREST Adjusting Footplate Depth 1. Remove the two mounting screws and locknuts (not shown) that secure footplate to the footrest tubes. Observe the angle of footplate for reinstallation. 2. Move the footplate to one of two mounting positions to accommodate the user. 3. Using the two mounting screws and locknuts, secure the footplate to the footrest tubes. The locknuts should lie in the channel of the footplate half clamp.
7 ARMS 7 Arms WARNING After any adjustments, repair or service and before use, make sure all attaching hardware is tightened securely - otherwise injury or damage may occur. Do not attempt to lift or tilt a wheelchair by using any removable (detachable) parts. Lifting by means of any removable (detachable) parts of a wheelchair may result in injury to the user or damage to the wheelchair. 7.1 1. Installing the Swingaway Padded Armrest Socket Remove the back.
7 ARMS 5. Remove the rear seat upholstery mounting screw and short mounting screw (FIGURE 2). Rear Seat Upholstery Mounting Screw 6. Remove the back stop insert from seat rail (FIGURE 2). 7. Perform STEP 5-6 on remaining back stop insert. 8. Secure the back stop insert weldment to the armrest socket, in the orientation shown, with two mounting screws, four washers, and two locknuts. Tighten securely (FIGURE 3). 9. Perform STEP 8 for remaining back stop insert weldment/armrest socket.
7 ARMS 10. Install the back stop insert/arm socket assembly into the seat rail. 11. Install short mounting screw through seat rail and into back stop insert/arm socket assembly. DO NOT tighten. 12. Install rear seat upholstery mounting screw. DO NOT tighten. Rear Seat Upholstery Mounting Screw Back Stop Insert/Arm Socket Assembly Short Mounting Screw FIGURE 4 Install Back Stop Insert/Arm Socket Assembly 13. Install the plunger pin into the back stop insert (FIGURE 5). 14.
7 ARMS Plunger Pin Back Stop Insert Split Ring Back Release Cord FIGURE 5 Connect Back Release Cord 16. Install the back. Refer to Removing/Installing the Back Frame on page 55.
7 ARMS 7.2 Installing/Removing/Adjusting the Swingaway Padded Armrest Swingaway Padded Armrest Installing 1. Secure mounting bolt and locknut in desired mounting hole. Tighten securely. 2. Insert swing away padded armrest into armrest socket so that notch fits around mounting bolt. Removing 1. Remove swing away padded armrest from armrest socket. Locknut Adjusting Height 1. Remove the swing away padded armrest from the arm socket. 2.
7 ARMS 7.3 Removing/Installing and Adjusting T-Arms Removing/Installing T-Arms Armrest To remove the T-arm, reverse this procedure. 1. Align the T-arm with the socket in the T-arm bracket on the wheelchair frame. 2. Slide the T-arm into the T-arm bracket until the height adjustment screw rests on the top on the T-arm bracket. Height Adjustment Hole Height Adjustment Screw Adjusting T-Arm Height 1. Remove the T-arm. Refer to Removing/Installing T-Arms on page 39. 2.
7 ARMS Adjusting T-Arm Position Locknuts T-arm can be mounted in one of two locations on the seat rail 1. Remove the two mounting screws and locknuts that secure the Tarm bracket to the seat rail. 2. Install T-arm bracket in desired mounting position on seat rail. 3. Secure the T-arm bracket to the seat rail with two mounting screws and locknuts. Securely tighten.
8 BACK 8 Back WARNING ALWAYS perform these procedures in the presence of an assistant. The position of the footrest, camber tube, seat angle, back angle, the tautness of the back upholstery as well as the user's condition are directly related to the wheelchairs stability. Any change to one or any combination of the five may cause the wheelchair to decrease in stability. Use EXTREME caution when using a new seating position. The addition of anti-tippers may be required.
8 BACK DETAIL “A” - FOLDING THE BACK DETAIL “B” - UNFOLDING THE BACK Seat Back Back Seat Back Release Cord Back Release Cord Back Cane (Shown in Folded Position) DETAIL “C” Back Cane Mounting Bracket Adjustment Square Locking Holes for Plunger Pin FIGURE 1 Unfolding/Folding the Back Invacare® Crossfire™T7A Wheelchair 42 Part No 1167484
8 BACK 8.2 Back Angle Adjustment For this procedure, refer to FIGURE 2-5. The numbers in the recess of the back angle plate are intended to define the resulting back angle of a chair that has 2 inch seat drop (at 17 inch depth) and that is measured relative to true vertical with the chair sitting on a level surface. The plus (+) sign increases the back angle and the minus (-) sign decreases the back angle. The resulting back angle will vary somewhat depending on your chair configuration.
8 BACK 8. Repeat STEPS 2-6 for remaining back cane. 9. WARNING After unfolding the back, ensure that the plunger pins are fully engaged in the mounting holes of the adjustment square in the back angle plates (Detail “A”). Otherwise, serious injury could result. Unfold the back until the plunger pins lock into the mounting holes in the adjustment square. 10. Unthread the placement screw until head of screw rests on seat rail (Detail “D”). 11.
8 BACK Placement Screw Jam Nut Back Cane Placement Screw Jam Nut Back Cane DETAIL “B” DETAIL “A” Back Angle Plate Adjustment Square Mounting screw secures the adjustment square from the other side of the plate Mounting Screw Recess for Adjustment Square Back Cane DETAIL “D” DETAIL “C” Back Angle Plate Jam Nut Adjustment Square Placement Screw Seat Rail Back angle plate, mounting screw and adjustment square are removed for clarity.
8 BACK DESIRED SEAT ANGLE ADJUSTMENT SQUARE POSITION NUMERICAL GRAPHICAL -8° Back Cane Adjustment Square Hole in adjustment square will align with 8- when installed in this orientation 75° Back Angle Plate Seat Rail -4° Back Cane Hole in adjustment square will align with 4- when installed in this orientation 79° Back Angle Plate Seat Rail FIGURE 3 Back Angle Adjustment - Adjustment Square Position Invacare® Crossfire™T7A Wheelchair 46 Part No 1167484
8 BACK 0° Back Cane OPTION 1 83° OPTION 2 Hole in adjustment square will align with 0° when installed in this orientation Seat Rail +4° Back Cane 87° Back Angle Plate Hole in adjustment square will align with 4+ when installed in this orientation Back Angle Plate Seat Rail FIGURE 4 Back Angle Adjustment - Adjustment Square Position Part No 1167484 47 Invacare® Crossfire™T7A Wheelchair
8 BACK +8° Back Cane 91° Hole in adjustment square will align with 8+ when installed in this orientation Back Angle Plate Seat Rail FIGURE 5 Back Angle Adjustment - Adjustment Square Position 8.3 Adjustable Tension Back Upholstery WARNING ALWAYS perform these procedures in the presence of an assistant. The position of the footrest, camber tube, seat angle, back angle, the tautness of the back upholstery as well as the user's condition are directly related to the wheelchairs stability.
8 BACK Adjusting the Tautness of the Back The adjustable tension back upholstery consists of an upper and lower (lumbar) section. To adjust the back tension, perform the following 1. Lift back upholstery cover up and flip over toward front of wheelchair 2. Tighten or loosen the adjuster fastening straps.
8 BACK Removing the Back Upholstery Cover 1. Remove the seat cushion, if applicable. 2. Pull the back upholstery cover away from the adjustable tension back upholstery separating the fastening strips of the back upholstery cover from the fastening strips of the adjustable tension back upholstery and seat (Details “A” and “B”). 3. Remove back upholstery cover from wheelchair. Removing the Adjustable Tension Back Upholstery 1. Remove the back upholster cover.
8 BACK Installing the Back Upholstery Cover 1. Install back upholstery cover onto the adjustable tension back ensuring the fastening strips on the back upholstery cover are aligned with the fastening strips of the adjustable tension back and seat (Detail “F”).
8 BACK DETAIL “E” Top Mounting Screw Adjustable Tension Back Upholstery Bottom Mounting Screw, Coved Spacer, Washer, and Locknut Fastening Strips located in between the back upholstery cover and the seat upholstery Back Cane Lumbar Strap Back Upholstery Cover DETAIL “F” Fastening Strips located in between the back upholstery cover and the adjustable tension back (both sides) FIGURE 8 Removing/Installing the Back Upholstery Cover, Adjustable Tension Back Upholstery and Lumbar Strap 8.
8 BACK Removing Foldover Back Upholstery 1. Back Upholstery Unfasten the two fastening flaps that secure the bottom of the existing back upholstery to the back canes. 2. Unfold the top of the back upholstery. 3. Lift up on the existing back upholstery and remove from the wheelchair. Front of Wheelchair Fastening Strips Fold Installing Foldover Back Upholstery 1. Install the new back upholstery onto the back canes. 2. Wrap the end of a fastening flap around the back cane. 3.
8 BACK HOLE* NUMBER BACK HEIGHT (IN INCHES) 8 - 11 10 - 14 12-16 14 - 18 16-20 1 8 10 12 14 16 2 9 11 13 15 17 3 10 12 14 16 18 4 11 13 15 17 19 5 NA 14 16 18 20 *Holes numbered from bottom to top for reference only. (There are no numbers on the back canes.) 3. Reinstall the back upholstery cover and adjustable tension back upholstery. Refer to Removing/Installing the Back Upholstery Cover, Adjustable Tension Back Upholstery and Lumbar Strap on page 49. 4.
8 BACK 8.6 Removing/Installing the Back Frame Back Frame Back Angle Plate Removing 1. Fold the back down. Refer to Unfolding/Folding the Back on page 41. 2. Loosen rear seat upholstery screw and short mounting screw but DO NOT remove. 3. Remove the two mounting screws, plastic washers, coved spacers, washers, and lock nuts that secures the back angle plates to the seat rails. 4.
9 SEAT 9 Seat WARNING ALWAYS perform these procedures in the presence of an assistant. The position of the footrest, camber tube, seat angle, back angle, the tautness of the back upholstery as well as the user's condition are directly related to the wheelchairs stability. Any change to one or any combination of the five may cause the wheelchair to decrease in stability. Use EXTREME caution when using a new seating position. The addition of anti-tippers may be required.
9 SEAT Fastening Strips located in between the back upholstery cover and the seat upholstery Seat Upholstery Seat Upholstery Detail “A” FIGURE 1 Replacing Seat Upholstery 9.2 Seat Angle Adjustment 1. The seat angle can be changed by raising or lowering the rear of the seat frame relative to the side frame. Fold the back. Refer to Unfolding/Folding the Back on page 41. 2. Flip wheelchair upside down. 3.
9 SEAT • Moving bottom mounting screws to a new adjustment hole in the crescent link. • Moving both mounting screws to a new adjustment hole in the crescent link. Mounting screws in both crescent links MUST be adjusted to the same adjustment hole. 7. Once seat angle has been adjusted, install one washer and one locknut onto each mounting screw in the crescent links. 8. Securely tighten all four mounting screws and locknuts. 9.
10 WHEEL LOCKS 10 Wheel Locks WARNING After any adjustments, repair or service and before use, make sure all attaching hardware is tightened securely - otherwise injury or damage may occur. 10.1 Replacing/Adjusting the Wheel Locks WARNING If wheel locks DO NOT hold the occupied wheelchair in place contact a qualified technician - otherwise injury or damage may occur. Before adjusting or replacing wheel locks, ensure that the tires are inflated to the recommended psi on the sidewall of the tire.
10 WHEEL LOCKS 5. Repeat the above procedures until the wheel locks hold the wheelchair. Push-to-Lock or Pull-to-Lock Wheel Locks Mounting Screws Wheel Lock Under Mount Wheel Lock 3/16 inch (1/8-inch) Tire 3/16 inch (1/8-inch) Mounting Screws Wheel Lock Shoe Wheel Lock Tire Wheel Lock Shoe FIGURE 1 Replacing/Adjusting the Wheel Locks Wheel lock Handle 10.2 Changing Wheel Lock Handle Position 1. Loosen, but DO NOT remove, the rear handle mounting screw. 2.
10 WHEEL LOCKS 10.3 Converting Wheel Lock From Push-to-Lock to Pull-to-Lock or Pull-to-Lock to Push-to-Lock Converting From Push-to-Lock to Pull-to-Lock 1. Remove set screw from the lower stop position (Detail “A”). 2. As the wheel lock handle is pushed downwards, the wheel lock will engage and then disengage the wheel. Push wheel lock handle down to access the upper stop position (Detail “B”). 3. Install set screw into upper stop position. 4. Pull wheel lock handle up to engage wheel lock.
11 WHEELS 11 Wheels WARNING After any adjustments, repair or service and before use, make sure all attaching hardware is tightened securely - otherwise injury or damage may occur. 11.1 Removing/Installing Rear Wheels 1. CAUTION Changing the size of the rear wheels can affect the performance of the wheelchair. Contact Invacare at the telephone numbers on the back of this manual before changing rear wheel size.
11 WHEELS Wheelchair Frame Quad-Release Axle not shown. Locking pins on the Quad-Release Axle are the same as Quick-Release Axle. Locking Pins Rear Wheel Quick-Release Axle Detent Pin FIGURE 1 Removing/Installing Rear Wheels 11.2 Adjusting Quick-Release Axles 1. Remove rear wheel and quick-release axle from the wheelchair. Refer to Removing/Installing Rear Wheels on page 62. 2. Depress detent pin in the quick-release axle and slide axle through the wheel hub. 3.
11 WHEELS 11.3 Replacing Quad-Release Axles 1. Remove rear wheel and the existing quick-release axle from the wheelchair. Refer to Removing/Installing Rear Wheels on page 62. 2. Remove existing quick-release axle from rear wheel. 3. Insert new quad-release axle through rear wheel hub. 4. Slide locking collar onto quad-release axle until it is snug against rear wheel and tighten securely with allen screw. 5. Reinstall rear wheel and the quad-release axle onto the wheelchair.
11 WHEELS 6. Flip the handle of the quad-release axle down to release the detent pin ensuring that the locking pins are fully released. 7. Repeat the above procedures until the quad-release axle locks correctly. Removing Play from Rear Wheels Adjusting Quad-Release Handle In and/or Out Locking Pins Quad Release Handle Adjusting Locknut (On Quick-Release Axle) Camber Bar Length Adjustment Screw Locking Screw FIGURE 4 Adjusting Quad-Release Handles Removing Play from Rear Wheels 1.
11 WHEELS 4. Remove the existing handrim. 5. Install new handrim by reversing STEPS 2-4. WARNING Allen Screw DO NOT inflate tire until it is completely assembled. Otherwise injury or damage may result. 6. Inflate tire to correct psi rating on the sidewall of tire. 7. Reinstall rear wheel to the wheelchair. Refer to Removing/Installing Rear Wheels on page 62. 8. Repeat STEPS 1-7 for opposite rear wheel if necessary. Handrim Locknut FIGURE 5 Handrim Replacement 11.
11 WHEELS 11.7 Adjusting Wheelbase Length, Adjusting Center of Gravity (COG) WARNING ALWAYS perform this procedure in the presence of an assistant. The position of the footrest, camber tube, seat angle, back angle, the tautness of the back upholstery as well as the user's condition are directly related to the wheelchairs stability. Any change to one or any combination of the six may cause the wheelchair to decrease in stability. Use EXTREME caution when using a new seating position.
11 WHEELS SOCKET SCREW MOUNTING POSITIONS CAMBER TUBE CLAMP FACING THE FRONT OF THE WHEELCHAIR CAMBER TUBE CLAMP FACING THE REAR OF THE WHEELCHAIR NOTE: Camber tube clamp shown in forward most position. NOTE: Camber tube clamp shown in rear most position.
11 WHEELS Repositioning the Camber Tube Clamps 1. Remove the rear wheels. Refer to Removing/Installing Rear Wheels on page 62. 2. Loosen, but DO NOT remove, the four socket screws and washers that secure the two camber tube clamps to the camber tube supports. 3. Slide the camber tube forward or backward to adjust the wheelbase length to the desired position. Ensure that both camber tube clamps are adjust to the same position in the camber tube support.
11 WHEELS Repositioning the Camber Tube Clamp Socket Screws 1. Remove the rear wheels. Refer to Removing/Installing Rear Wheels on page 62. 2. Refer to Socket Screw Mounting Positions in to determine which socket screw(s) MUST be moved and to which mounting positions. 3. Remove the four socket screws and washers from both camber tube clamps. 4. Align the desired mounting positions of the camber tube clamps with the opening of the camber tube supports. 5.
11 WHEELS 4. Align the desired mounting positions of the camber tube clamps with the opening of the camber tube supports. 5. CAUTION Ensure one empty mounting position remains between the two socket screws, otherwise damage to the wheelchair may occur. Install the four socket screws and washers into the desired mounting positions of both camber tube clamps. Hand tighten. Ensure that both camber tube clamps are adjust to the same position in the camber tube support.
11 WHEELS 11.8 Adjusting Wheelbase Width Perform this procedure on one side of the wheelchair at a time for ease of adjustment. The wheelbase width can be increase/decreased by 3/4 per side = 11/2 inch total range of adjustment. 1. Remove the rear wheels. Refer to Removing/Installing Rear Wheels on page 62. 2. Loosen the axle nut and rotate axle busing to increase/decrease the wheelbase width. 3. Securely tighten axle nut. Torque nut to 30-35 ft.-lbs. 4.
11 WHEELS 11.9 Removing/Installing the Camber Tube CAUTION Camber tube clamps - Make sure the clamp screws are securely tightened before using the wheelchair, otherwise personal injury or damage to the wheelchair may occur. Removing the Camber Tube 1. Remove the rear wheels. Refer to Removing/Installing Rear Wheels on page 62. 2. Loosen the two socket head clamp screws securing camber tube to the two camber tube clamps. 3. Slide the camber tube through he camber tube clamps.
11 WHEELS Camber Tube Clamp DETAIL “A” - CORRECT ORIENTATION FOR EACH CAMBER TUBE 0° angle Socket Head Clamp Screw Axle Bushing Camber Tube Camber Tube Clamp 6° angle 3 ° angle 9° angle Camber Tube Socket Head Clamp Screw FIGURE 12 Adjusting Wheelbase Length, Adjusting Center of Gravity (COG) Invacare® Crossfire™T7A Wheelchair 74 Part No 1167484
11 WHEELS 11.10 Adjusting the Camber Tube Camber tube clamps - Make sure the clamp screws are securely tightened before using the wheelchair, otherwise injury or damage to the wheelchair may occur. Stand behind the wheelchair to determine left or right. 1. Loosen, but DO NOT remove, the socket head clamp screws in the camber tube clamps (Detail “A”). 2. Using an "L" square, rotate the axle tube until the flat edge of the camber tube is at a 90° angle with the ground/floor.
11 WHEELS 11.11 Determining/Setting Toe In/Toe Out For this procedure, refer to FIGURE 12 on page 74 and FIGURE 14. 1. Inflate all pneumatic tires to recommended tire pressures (listed on the sidewall of the tire). 2. Measure the distance between the centerlines at the rear and front of the rear wheels at approximately 12 inches (for 24-inch diameter wheels) from the ground/floor (FIGURE 14). 3. Determine difference between two measurements.
11 WHEELS Front of Wheelchair Toe-out Centerlines of Rear Wheels Front of Wheelchair Toe-in Wheel Center Line Top View of Wheelchair Top View of Wheelchair Smaller than Front Measure Here Larger than Front Centerlines of Rear Wheels FIGURE 14 Determining/Setting Toe In/Toe Out 11.12 Adjusting Fork Tension 1. To properly tighten forks and guard against flutter, perform the following check on both forks: 2. A. Tip back the wheelchair to floor. B.
11 WHEELS • • • Standard Forks - Adjust locknut according to freedom of caster swing (Detail “A”). a. Tighten locknut to reduce caster swing. b. Loosen the locknut to increase caster swing. Suspension Fork (Detail “B”) a. Refer to Removing the Elastomer on page 82 to remove the elastomer and suspension fork bottom to access the locknut. b. No tension adjustment can be performed on this fork. c.
11 WHEELS 11.13 Removing/Installing/Repositioning the Caster Assemblies If replacing a front caster note the mounting position of the existing front caster for installation of the new front caster. Fork Locknut Mounting Bolt Both front casters MUST be the same size and adjusted to the same height. Standard Forks Removing Front Caster 1. Remove the mounting bolt, axle spacers and locknut that secure the front caster to the fork. 2. Remove the caster from the fork.
11 WHEELS Installing the Caster 1. Align the caster with the desired mounting holes in the fork. 2. Insert the threaded bushing with mounting screw, through the two axle spacers and caster. DO NOT use excessive force. Fork Mounting Screw WARNING Use Loctite™242 when reinstalling the mounting screw into the threaded bushing. Otherwise the fork can become disassembled. Possible injury or damage could result. 3. Apply Loctite 242 to the mounting screw. 4.
11 WHEELS 11.14 Removing/Installing the Fork Assembly If replacing a fork, note the mounting position of the existing front caster for installation of the new fork. Removing Fork Assembly 1. Remove the front caster from the fork. Refer to Removing Front Caster on page 79. 2. Perform one of the following: • Standard Forks - Remove locknut securing the fork from the fork stem (Detail “A”). • Suspension Fork (Detail “B”) a. • Unscrew fork stem from head tube. One Sided Fork (Detail “C”) a.
11 WHEELS 2. Install the front caster. Refer to Installing Front Caster on page 79. DETAIL “B” - SUSPENSION FORK DETAIL “A” - STANDARD FORK Head Tube DETAIL “C” - ONE SIDED FORK Head Tube Fork Stem Fork Stem Fork Fork Stem Locknut FIGURE 19 Removing/Installing the Fork Assembly 11.15 Removing/Installing the Elastomers (Suspension Forks Only) CAUTION DO NOT use excessive force when removing/installing the threaded sleeve from/onto the fork. Damage to the threaded sleeve may occur.
11 WHEELS 2. Remove the threaded bushing and mounting screw securing the suspension fork top to the elastomer and the suspension fork bottom. DO NOT use excessive force. 3. If replacing the elastomer, discard the existing elastomer. Installing the Elastomer Make sure the elastomer sits in the two recessed areas on the fork. 1. Position the new elastomer between the suspension fork top and suspension fork bottom. 2. Align the mounting holes in the suspension fork top and suspension fork bottom.
12 ANTI-TIPPER 12 Anti-Tipper WARNING After ANY adjustments, repair or service and BEFORE use, make sure all attaching hardware is tightened securely otherwise injury or damage may occur. 12.1 Adjusting/Replacing Anti-tipper For this procedure, refer to FIGURE 1 on page 86 and FIGURE 2 on page 87. WARNING Anti-tippers MUST be attached at all times.
12 ANTI-TIPPER Adjusting Anti-tipper 1. WARNING When anti-tippers are used, anti-tippers MUST be adjusted to maintain a 1-1/2 to 2-inch clearance between the bottom of the anti-tipper wheels and the ground/ floor. This spacing should ALWAYS be checked whenever adjustments/changes are made to the wheelchair. Failure to maintain proper spacing may result in the chair tipping over backward causing serious injury or property damage.
12 ANTI-TIPPER Top Adjustment Hole Release Buttons DETAIL “A” ANTI-TIPPER ADJUSTMENT HOLES Anti-Tipper Bar Lock Buttons Anti-Tipper Ground/ Floor 1-1/2 to 2 inch Clearance FIGURE 1 Adjusting/Replacing Anti-tipper Invacare® Crossfire™T7A Wheelchair 86 Part No 1167484
12 ANTI-TIPPER ANTI-TIPPERS USED WITH HIGH SEAT TO FLOOR HEIGHTS ANTI-TIPPERS USED WITH LOW SEAT TO FLOOR HEIGHTS 161/16 211/8 Anti-Tipper Anti-Tipper Release Buttons Anti-Tipper bracket used with high seat to floor heights Release Buttons Lock Buttons Mounting Hole Lock Buttons Mounting Hole Anti-Tipper bracket used with low seat to floor heights FIGURE 2 Adjusting/Replacing Anti-tipper Part No 1167484 87 Invacare® Crossfire™T7A Wheelchair
Invacare Corporation USA One Invacare Way Elyria, Ohio USA 44036-2125 800-333-6900 Part No 1167484 Rev A - 9/10 www.invacare.
