15.20. ADJUST AND ALIGN MAIN AND EXTENSION SCREED PLATES - Continued.
ALIGN - Continued.
ALIGN EXTENSION SCREED PLATES FLUSH
WITH MAIN SCREED PLATES.
crushing hazard. Stay clear of
screed during screed operations.
Failure to do so may result in death
or serious injury.
Cribbing is used under the screed
only as a safety precaution. Do not
lower the screed onto the cribbing.
procedure to allow for placement of
Start paving machine engine and fully
retract extension screed per TM 5-3895-
Shut down paving machine and remove
key from ignition per TM 5-3895-373-10.
Position cribbing under screed.
Place straightedge along bottom of main
screed plate (11) and across inside of
extension screed plate (21) at B-B and
across outside of extension screed plate
(22) at C-C.
adjustment knobs are not separated
during this procedure.
Adjust extension screed height adjustment
knobs to align leading edges of extension
screed plates (21 and 22) from 0.125 to
0.19 in. (3,2 to 4,8 mm) higher than trailing
edge of main screed plate (11) at B-B and
C-C. It may be necessary to adjust
extension screed height adjustment knobs
to obtain 0.125 in. (3,2 mm) at both points
B-B and C-C. (Refer to TM 5-3895-373-
10.) If measurements cannot be obtained
at both B-B and C-C, repeat step 1.
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