Spring - F-450, F-550: Installation
WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- If removed, install the auxiliary spring.
- Position the auxiliary spring spacer.
- Position the auxiliary spring.
- Position the upper spring plate.
- Install the auxiliary spring nut and tighten to 80 Nm (59 lb-ft).
- Position the rear spring shackle onto the spring and install the spring-to-shackle nut and bolt until snug.
- Position the rear spring assembly and install the shackle-to-rear bracket bolt and flag nut until snug.
- Install the spring-to-front bracket bolt and flag nut until snug.
- Install the U-bolts, springs plate and U-bolt nuts. Align the U-bolts so they are as vertical as possible and tighten the nuts until snug.
- With the suspension at curb height, tighten the spring-to-shackle nut to 225 Nm (166 lb-ft).
- With the suspension at curb height, tighten the shackle-to-rear bracket bolt to 225 Nm (166 lb-ft).
- With the suspension at curb height, tighten the spring-to-front bracket bolt to 625 Nm (444 lb-ft).
- With the suspension at curb height, tighten the nuts evenly in a cross-type pattern in 4 stages.
- Stage 1: Tighten to 100 Nm (74 lb-ft).
- Stage 2: Tighten to 200 Nm (148 lb-ft).
- Stage 3: Tighten to 300 Nm (222 lb-ft).
- Stage 4: Tighten to 400 Nm (295 lb-ft).
CAUTION:
Final tightening of the spring-to-shackle nut must be done with the suspension at curb height.
CAUTION:
Final tightening of the shackle-to-rear bracket bolt must be done with the suspension at curb height.
CAUTION:
Final tightening of the spring-to-front bracket bolt must be done with the suspension at curb height.
CAUTION:
Final tightening of the U-bolt nuts must be done with the suspension at curb height.