Screed Pull-point Height Adjustment
Figure 20
Cut-Off Shoe Installed on L.H. Side Plate
Typical pull point settings:
Figure 18
Distance from base Mat Depth
16 3/4" (High)
31/2" or thicker
14 1/4" (Normal)
1/2" to 3 1/2" inclusive
13" (Low)
Minimum to 1 1/2"
10 1/2" (Lowest)
Minimum to 3/4" (optional)
minimize irregularities found in the grade or base
material.
1. The screed pull-arms. can be raised or lowered by
moving the ball-joint connection up or down or by rotating
it and lining up bolt holes. With the usual type of material
and mat thickness encountered, the distance of 141/
inches from center of joint to the ground, as shown in
Figure 20 and the chart following it.
In nearly all types of material, the straighter the pull
on the screed, the more satisfactory it will operate. The
most critical settings are with low stability sandy mixes.
Laying Reduced Width Mat Using
2. If the screed tends to sink and ride on the trailing
Cut-off Shoe
edge, due to unstable mix, or if a very thick mat is
Figure 19
required, the long screed pull arms can be raised to
improve the mat.
of wood to block off that area between screed
3. When the paver is required to lay a very thin mat,
moldboard and the tractor.
the screed pull arms can be lowered to give the screed
IMPORTANT NOTE! Always remove cut-off shoe
better flotation and more initial density to the mat.
before raising screed.
4.
Two bolts in each ball-joint connection are
sufficient for all positions.
SCREED PULL ARM POSITIONS
5. When the pull points are too low and the front of
The long screed pull arms which are attached to
the screed is tilted up, in order to maintain the correct
the crawler frame with a ball-joint connection provide
mat thickness, the following wear and op-
maximum floating action, allowing screed to
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