Important: The Delrin liner must be positioned on the top side of the main support beam.
- Position the main support beam on the axle seat with the main support beam center dowel pin. Pilot the main support beam into the hole of the axle seat or the spacer plate.
Important: Do not tighten the U-bolts at this time. Position the torque rod mounting bolts of the spring seats toward the front of the vehicle.
- Install the following components:
- Lower the air spring and the cross channel mounting bolts into the main support
beams (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.
- Install the washers and the locknuts (4) that connect the cross channel (1) to the main support beam (3).
Tighten
Tighten the locknuts in 37 N·m (50 lb ft) increments to 330 N·m (243 lb ft).
- Lower the frame in order to ensure that the spring hangers engage the main support beam.
- Refill air into the system.
- Center the tip of the main support beam between the spring hanger legs.
Important: Do not exceed the specified torque on the U-bolt locknuts.
- Tighten the U-bolt nuts.
Tighten
Tighten the nuts in 37 N·m (50 lb ft) increments to 394 N·m (291 lb ft).
- Hit the top of the U-bolts using a hammer. Retighten the U-bolt nuts.
Tighten
Tighten the U-bolt nuts in 37 N·m (50 lb ft) increments to 394 N·m (291 lb ft).
- Install the following components in the hangers:
Tighten
Tighten the rebound bolt locknut to 82 N·m (61 lb ft).
- Unblock the wheels.
- Inspect the alignment after installing the new main support beams.