Calder Brothers Corporation Page 9
Model: 690G Gravity Feed Paver 690F Operations Manual Rev 1.1
FREEDOM SCREED CROWN SETTING
1a. On a flat surface, find the null position of the screed depth handles by adjusting them until
they are free and not in tension.
1b. Run a string across the leading edge (front) of the main screed bottom, as close as possible
to the bullnose of the screed plate, and adjust the forward ratchet jack until there is a slight
gap (approximately 1/16” or less) between the screed plate and the string.
*String MUST be on the flat portion of the screed, not on the radius portion*
2. Place the string across the back of the main screed bottom, near the trailing edge (rear)
curvature of the screed plate, and adjust the rear ratchet jack until the screed plate just
touches the whole length of the string. Pull the string away, at one end, and bring it back to
verify that it contacts the entire length at the same time.
*String MUST be on the flat portion of the screed, not on the radius portion*
3. Place the string across the front of the screed bottom and double check the gap between
the screed bottom and the string. Re-adjust the forward ratchet jack as necessary to obtain
the 1/16” or less gap between the string and screed plate.
4. Place the string across the rear of the screed bottom and double check the gap between the
screed bottom and the string. Re-adjust the rear ratchet jack as necessary to verify the
screed plate just touches the whole length of the string.
5. Repeat steps 3 and 4 until no adjustment is required.
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