3.1 Des crip ti on
The APR 2220/2620/3020/3520 is a re vers ible vi brat ing plate op -
er at ing on the ba sis of the twin-shaft vi bra tion sys tem prin ci ple.
The en gine drives the ex citer on the base plate via a cen trif u gal
clutch and a V-belt. The ex citer pro duces the vi bra tion re quired
for com pac tion as a re sult of the built-in im bal ance.
The ma chine is guided at the tow-bar grip. It is op er ated with the
op er at ing con trols on the tow-bar.
The APR 2220/2620/3020/3520 is suit able for all com pac tion
work in the fields of civil en gi neer ing an droad con struc tion.
It can be used to com pact all ground ma te ri als such as sand,
gravel, slag, crushed stone, as phalt and com pos ite sett pav ing.
3.1.1 Equip ment over view
1 En gine
2 Cen tral point sus pen sion
3 Tow-bar
4 Op er at ing con trol/tow-bar
5 Base plate with ex citer
6 Trans port truck (Special equip ment)
3.2
Op er at ing con trol at the tow-bar
1 Con trol le ver
The con trol le ver serves for ad just ment of the unbalances in the
ex citer and in turn for coninuous reg u la tion.
I For ward
0 Point com pact ing
II Re verse
The con trol le ver re mains au to mat i cally in po si tion only when set
to the max i mum for ward travel set ting (a). In any other po si tion,
the con trol le ver moves in the di rec tion of max i mum for ward
travel when re leased.
If the con trol le ver is op er ated too quickly sev eral times, the shift
le ver will block in re verse travel. In this case:
•
Re lease le ver in for ward travel po si tion up to max i mum for -
ward travel po si tion
•
Block ing is cleared within a few sec onds and per fect shift ing is
pos si ble
The con trol le ver can be op er ated only with the en gine run ning.
The le ver blocks if op er ated when the ma chine is sta tion ary.
Block ing is im me di ately cleared when the en gine is re started.
2 En gine speed con trol le ver
STOP En gine stop (APR 3520 only)
MIN Idle (detent po si tion)
MAX Full load
The mo tor speed can be ad justed steplessly with the con trol le -
ver. At min i mum mo tor speed (min), the drive to the ex citer is dis -
con nected at the cen trif u gal clutch and the mo tor idles. The cen -
trif u gal clutch en gages when the con trol le ver is moved ap prox i -
mately ¼ of its ad just ment travel.
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