Calder Brothers Corporation
Model: 650 Gravity Feed Paver
Page 11
650 Operations Manual Rev 1.1
SETTING THE FREEDOM® TO PAVE
The procedure on the previous page was set on your Freedom® Screed before leaving the
factory. It is strongly recommended that before initial start up you follow this procedure and check
the settings.
BEFORE YOU PAVE WITH THE FREEDOM®
Screed must be elevated a distance equal to the desired mat depth plus enough extra height to
allow for compaction. To achieve this, the most popular methods are; an asphalt pad and starting
blocks.
• Starting Blocks – a 2.5” thick starting block is a good starting block for a finished mat of 2
inches
• Compacted Asphalt Pad – a starting block equal to the amount of compaction will be
required.
• Non-Compacted Asphalt Pad – just lower the screed fully onto pad, no starting block
required.
Starting blocks should be at least as long as the front to rear dimension of the screed plate. They
should be placed lengthwise in the direction of travel, directly below the screed depth cranks.
Nulling The Screed & Setting Angle of Attack
This is the adjustment of the screed to the perfectly flat position on either the starting blocks or the
asphalt pad. To null the screed follow this procedure:
1. Lower screed completely onto starting surface, (blocks or pad).
2. Rotate the cranks until you locate the position of free movement. This is a limited area
where the depth cranks will both rotate freely in either direction. This is the nulled position.
3. Rotate thickness screw two full rotations, (in the thicker direction). Start paving and make
adjustments as required.
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