GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 1999 🢒 Isuzu MD Steel Tilt (F Model) 🢒 Suspension 🢒 Tires and Wheels 🢒 Tire Dismounting and Mounting

Removal Procedure

    Object Number: 214470 Size: SH

    Caution: Use of eye goggles is necessary to prevent personal injury.

  1. Completely deflate the tire prior to dismounting. If the rim is damaged, deflate the tire prior to removing the assembly from the vehicle. Reduce the pressure by pushing in the valve stem, or remove the entire core. Keep your eyes away from the valve.
  2. Loosen both beads from the rim by driving the flat end of the tire tool between the tire bead and the rim flange. Straighten the tool to a vertical position. Hammer downward in order to pry the tire from the rim. Repeat this step at approximately 200 mm (8 in) intervals around the flanges until you free the beads from the rim.

    3. Object Number: 214473 Size: SH
  3. Place the wide side of the rim down.
  4. Lubricate the tire bead and the rim.
  5. Insert the curved end of both tools. Step on the tire opposite the valve in order to direct the first bead into the rim well. Hold one tool in position with your foot, and pull the second tool toward the center of the rim. Progressively work the first bead off of the rim.

    6. Object Number: 214475 Size: SH
  6. Stand the wheel on the tire tread with the valve near the top.
  7. Lubricate the second bead and the rim.
  8. Insert the straight end of the tool between the tire bead and the back rim flange. Hook the tool over the second flange. Lean the tire assembly toward the tool. Provide a rocking or a bouncing action in order to pry the rim out of the tire.

    9. Caution: Use of eye goggles is necessary to prevent personal injury.

  9. Clean the rim of dirt, corrosion and light rust. If you mount the tires on dirty or corroded rims, or if you do not properly center the tires on their rims, then the tire bead may bind on the rim and refuse to seat. Replace any rims that are corroded and weakened:
    10. • Remove surface rust and other foreign material from the rim.
    • Verify that rim flanges and the bead ledge areas are smooth and clean, especially around the hump and the radius.
    • Remove the following foreign materials using a wire brush:
       - Dried tire mounting lubricant
       - Surface rust
       - Heavy paint
    • Paint steel wheels that show bare metal using a good grade of aluminum paint or equivalent, in order to prevent rust.
  10. Inspect the rim for the following conditions:
    11. • Cracks
    • Bends
    • Corrosion which results in heavy pitting
    • Rust
    • Distortion
  11. Replace damaged rims.

Installation Procedure

    Object Number: 205890 Size: SH

    Caution: Only use mounting equipment tools specifically designed for tire mounting. Do not use improvised tools. Failure to observe this precaution could cause serious injury to you or other personnel in the area.

    Notice: When mounting the tires, use an approved tire mounting lubricant. DO NOT use silicon or corrosive base compounds to lubricate the tire bead and the wheel rim. A silicon base compound can cause the tire to slip on the rim. A corrosive type compound can cause tire or rim deterioration.

    Important: Use only proper size rims. Do NOT exceed the recommended air pressures as specified on the vehicle certification label.

  1. Select tires and rims which are the correct size.

    2. Object Number: 203179 Size: SH
  2. Place the valve stem (3) with the rubber washer through the valve hole from the tire side of the rim.

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Screw on the valve nut (1) from the opposite side. Center the rubber bushing, the metal collar, and the nut snugly in the valve hole.

    4. Tighten
    Tighten the valve stem nut to 6 N·m (53 lb in).


    Object Number: 203180 Size: SH
  4. Use an approved tire mounting compound such as RU-Glyde®, Frey Lube II® or equivalent in order to lubricate the following areas:
    5. • The tire beads
    • The rim flanges
    • The bead ledge areas

    Object Number: 214479 Size: SH
  5. Place the rim on the floor with the wide end side down.
  6. Push the first bead over the flange and into the rim well.
  7. Using the straight end of a tool (with the stop resting on the flange of the rim), take small bites in order to work the remaining section of the bead onto the rim.

    8. Object Number: 214482 Size: SH
  8. Stand on the tire in order to start the second bead over the rim flange into the well.
  9. Use the spoon end of a tire iron, with the stop toward the rim. Work progressively around the bead using small bites until the bead slips over the flange onto the rim base.

    10. Object Number: 203182 Size: SH

    Caution: Be careful not to drop tire and wheel assemblies on your hands and feet. Lift properly, using your legs as well as your body. Tires and wheels are heavy and can cause injury if not handled correctly.

    Caution: Allowing pressure to continue to build up within a tire in an attempt to seat the bead is a dangerous practice that can result in a broken tire bead and possible serious injury to the technician.

    Important: 

       • Use dry air for tire inflation. Use moisture traps on the air lines leading from the air compressor.
       • Do NOT overload the tires. Verify that the load and the vehicle weights do not exceed the rated load of the tires used on the vehicle. The rims are designed in order to sustain the maximum rated load of the maximum tire size that is recommended for that rim. Refer to the Vehicle Certification Label Description in General Information for recommended rated load and tire size.
       • Do not exceed the maximum inflation pressures. Inflation pressures are determined by the size and the ply rating of the tire. Refer to the manufacturer's specification for proper inflation. Equally inflate both tires of a dual assembly in order to equally distribute the weight.

  10. Inflate the tire in a safety cage using an extension hose equipped with an air gage and a chuck. Confirm that you have seated the bead properly by referencing any circumferential design element on the tire and on the top of the rim flange. These design elements should be equally spaced around the tire.