Keith Running Floor II Metric, Installation Manual, Page: 18 / 49

4 DRIVE UNIT
Drive unit installation in a center frame trailer differs from an installation in a frameless
trailer. Chapter 4 examines the two installations separately.
4.1 Center frame trailer
1. Decide on the location of the drive unit.
The drive unit should be installed as close to the rear of the trailer as is practical.
2. Position drive unit.
The drive should be positioned, but not welded, before the sub-deck is installed.
Remove the formed cross-members from the drive unit. The system can be lifted
into an open top trailer from above with a crane.
If the trailer top is closed or a lifting mechanism is not available, use the following
method:
a. Set a sheet of plywood inside the rear of the trailer.
b. Place blocking on the sheet to protect hydraulic tubing.
c. Lay the drive unit on the sheet.
d. Slide the sheet forward into the drive gap.
e. Raise the rear of the unit so the front stiffener plate will fit under the
forward cross sill.
f. Slide the unit forward so the rear stiffener clears the rear cross sill.
g. Lower the unit and slide to position.
NOTE: A minimum drive gap of 1980mm is necessary to maneuver the drive unit.
Replace the formed cross-members after setting the drive end plates on the
trailer frame rails (Figure 20). The formed sills should be tightened to a torque of
170 N°m.
IMPORTANT : Do not damage piston rods. Do not lift drive unit by the hydraulic
crossover tubes on the cylinders or any other hydraulic components.