Dynapac F 161 W - Paving with Screed Stopper and Screed Charging;Relieving; General; Screed Charging;Relieving; Screed Stop

D 4.7 15
D_4.7_01_GB.fm 15-34
1.5 Paving with screed stopper and screed charging/relieving
General
The screed hydraulics can be influenced in two ways to attain optimum paving re-
sults:
- Screed stop with and without pretensioning with the paver finisher halted,
- Screed charging or relieving with the paver finisher driving.
A
Relieving reduces the screed weight and increases the traction force.
Charging increases the screed weight, reduces the traction force, but increases the
compaction ratio. (To be used with light-weight screeds in exceptional cases.)
Screed charging/relieving
This function charges or relieves the
screed regardless of its own dead
weight.
Switch (1) has the following positions:
A: Relieving (screed ‘lighter’)
B: without function
C: Charging (screed ‘heavier’)
Switch positions „Screed charging/relieving” are only effective when the paver finish-
er moves. When the paver finisher stops, „screed stop” is automatically selected.
Screed Stop
With the function "Screed Stop" the hydraulic system of the screed can be stopped,
so that the lowering of the screed is prevented in case of temporary stopping.
Using the switch (2) the following posi-
tions can be selected:
A: automatic screed stopping if the
drive lever is in central position.
B: screed stopping continuously en-
gaged
C: turned off
A
Position (C) is to be used for adjusting
the paver finisher and for lifting/lowering of the screed, and position (A) needs to be
used for laying.
m
Position (B) provides no sufficient safeguarding in case of transportation or mainte-
nance!
In such a case, the screed transport safeguard must be inserted.
Screedswitch_al_oldl.bmp
1
B
A
C
Screedswitch_al_oldl.bmp
2
B
A
C