allen BDF4836B, Safety & Operation Manual

9.  PAVING SKEWED DECKS

- BASIC MACHINE

Follow the standard machine setup instructions, initial roller and 
drag pan adjustments and roller rotation. Make sure that the truss 
and carriage rail have been straightened per standard machine 
setup. Mechanically disconnect the hydraulic skew cylinder and 
tie it back out of the way. Manually rotate the lower carriage until 
the paving rollers are parallel to the centerline and lock in position 
using the skew ring clamps provided with the machine. 

The drag pan and burlap/astrograss “H” frames will need to be 
turned so that they are parallel to the carriage rail. This allows 

the pan and the texturing cloth to follow the skew angle as the 

carriage travels across the deck or slab.

At this point the paving rollers need to be stringlined to the car-
riage rail so that the rollers are parallel to the carriage rail. Follow 
the standard setup instructions for stringlining the paving rollers. 
Be sure to run the stringline across the top of the carriage rail 
adjacent or parallel to the paving rollers.

10. PAVING SKEWED FLAT DECKS AND SUPER 

ELEVATIONS WITH NO CROWN 

- Paving skewed flat decks 

and super elevations do not require any special equipment. When 
specifications allow, the machine can be positioned at an angle 

approximately equal to the skew angle. Position the lower carriage 

so that the paving rollers are parallel to the centerline of the deck. 
The deck should be finished from the leading end of the machine 
to the trailing end of the machine. The paving rollers should be 
rotating in the same direction and the automatic roller reversing 
valve should be set in the “Non-Reversing” position.

The concrete should be pushed from the low side to the high side 
of the elevation and roll over the concrete going down the super 
elevation. The machine should pave from the leading end (must 
be the low side of the deck) to the trailing end (must be high side 
of the deck).

11. PAVING SKEWED DECKS WITH CROWN

 - Review 

the project specifications and requirements. When determining 
machine lengths for skewed decks with a crown, remember 
all lengths start with the crown line. Contact the ACP Service 
Department if the crowned deck requires a special length insert. 
The machine frame and the carriage rail should be crowned on 
opposite corners of the inserts. 

NOTE: WHEN PLACING A CROWN 

INTO THE MACHINE THE DIAGONAL ANGLE BRACES IN THE 

SECTION BEING CROWNED.

When the 4836 Paver is skewed to pave skewed decks with a 

crown, each carriage travel rail must be crowned exactly above 

the crown line on the deck.  The lower carriage must be skewed 
so that the paving rollers are parallel to the centerline of the deck. 
The carriage wheels on the upper carriage must be repositioned 
so that they are centered over the crown line. Reposition the car-

riage wheels by means of the Optional Carriage Skew Bar Kit. The 
skew bar kit offsets the carriage wheels so that when the carriage 
passes through the crown the paving rollers pass over the crown 
parallel to the crown line. The skew bar kit comes drilled for 
skew angles of 22 degrees through 45 degrees. If the skew bar 
kit is installed in the field, it may be advantageous to remove the 
carriage and install the kit while the machine is split for the instal-
lation of additional inserts. It is important that you know and have 
available the following information before ordering the optional 
skew bar kit: 1) What is the skew angle? 2) Is the skew angle 
measure from a line “parallel to” or “perpendicular to” the cen-
terline of the bridge deck? Note: For consistency, ACP measures 
from perpendicular. 3) Is the skew clockwise or counter clockwise 
from a line perpendicular to the centerline of the bridge deck? 4) 
Is the deck crowned? 5) What is the cross slope (%) for each side 
of the crown? 6) What is the distance, measured perpendicular to 
the centerline of the deck, between the screed rails? 7) Know the 
Model and Serial Number of your machine.

•  Skew Bar Kit Installation:

1.  Remove the carriage assembly from the machine and block up 

the carriage so that the carriage weight does not rest on the 
paving rollers.

2.  Remove or deactivate the carriage skew cylinder.

3.  Remove the carriage wheel assemblies from the carriage hang-

er frame and put aside for re-installation.

4. 

Add  extension  chain  tightener  plates  onto  the  existing  chain 

tightener plates.

5.  Install the tube mount brackets into the upper carriage frame 

and mount the skew bar tubes at the locations marked “Base”.

6.  Install the carriage wheel mounts onto the skew bar tubes at 

the bolt holes that match the angle determined by your job 
specifications.  Install the carriage wheel assemblies that were 
removed from the carriage hanger frame into the carriage 
wheel mounts on the skew bar.

7.  Install the complete carriage assembly with skew bar it into the 

machine frame.

SECTION 2

OPERATIONS

050362

Page 45

2.7 - Paving Operations, continued