Procedure to Install the New Heater Elements on Asphalt Screeds{6643, 664E} Caterpillar

Procedure to Install the New Heater Elements on Asphalt Screeds{6643, 664E}

Usage:

Asphalt Screed:: 10-20B (S/N: BWN1-UP); 8-16B (S/N: BWL1-UP); AS2251 (S/N: CWF1-UP); AS2301 (S/N: AWC1-UP)

Introduction

New heater elements for the screed plates with improvements in sealing and wiring are being used on electrically heated front mounted screeds and rear mounted screeds.

Installation for Rear Mounted Screeds

Show/hide table

Table 1
The new heaters are effective with the following rear mounted screeds:
10-20B (S/N: BWN2549)
8-16B (S/N: BWL322)

Show/hide table

Table 2
The new heaters are adaptable to the following rear mounted screeds:
10-20B (S/N: BWN1-2548)
8-16B (S/N: BWL1-321)

Show/hide table

Table 3
New Heater Elements for 8-16B Asphalt Screeds
Location on Asphalt Screed	Outer Heater	Inner Heater	Harness	Cover
Right Hand, Main	301-7446	301-7442	310-1557	311-6536
Left Hand, Main	301-7446	301-7442	310-1556	311-6536
Right Hand Extender	301-7446	301-7442	310-2929	311-6536
Left Hand Extender	301-7446	301-7442	310-2930	311-6536
305 mm (1 ft) Extension	301-7435	N/A	309-9798	311-6537
610 mm (2 ft) Extension	301-7435	301-7435	309-9227	311-6538

Note: The harness and cover part numbers listed are for reference only. Refer to the rework instruction for modifying the existing covers and harnesses.

Show/hide table

Table 4
New Heater Elements for 10-20B Asphalt Screeds
Location on Asphalt Screed	Outer Heater	Inner Heater	Harness	Cover
Right Hand, Main	301-7436	301-7437	310-1557	311-6535
Left Hand, Main	301-7436	301-7437	310-1556	311-6535
Right Hand Extender	301-7436	301-7437	310-1558	311-6535
Left Hand Extender	301-7436	301-7437	310-1555	311-6535
305 mm (1 ft) Extension	301-7435	N/A	309-9798	311-6537
610 mm (2 ft) Extension	301-7435	301-7435	309-9227	311-6538

Note: The harness and cover part numbers listed are for reference only. Refer to the rework instructions for modifying the existing covers and harnesses.

The new heaters can be incorporated into any section of the adaptable electrically heated rear mounted screeds by using the corresponding inner heater, outer heater, and modifying both the harness and the covers for that section per the included instructions. Refer to Table 3 and Table 4.

Installation for the Front Mounted Screeds

Show/hide table

Table 5
The new heaters are effective with the following rear mounted screeds:
AS2251 (S/N: CWF313)
AS2301 (S/N: AWC1091)

Show/hide table

Table 6
The new heaters are adaptable to the following rear mounted screeds:
AS2251 (S/N: CWF1-312)
AS2301 (S/N: AWC1-1090)

Show/hide table

Table 7
New Heater Elements for AS2251 Asphalt Screeds
Location on Asphalt Screed	Outer Heater	Inner Heater	Harness	Cover
Right Hand, Main	301-7441	301-7442	310-4192	311-6922
Left Hand, Main	301-7441	301-7442	310-4191	311-6922
Right Hand Extender	301-7443	301-7444	310-4193	311-7134
Left Hand Extender	301-7443	301-7444	310-4190	311-7134
305 mm (1 ft) Extension	301-7435	N/A	309-9798	317-2177
610 mm (2 ft) Extension	301-7435	301-7435	309-9227	317-3227

Note: The harness and cover part numbers listed are for reference only. Refer to the rework instructions for modifying the existing covers and harnesses.

Show/hide table

Table 8
New Heater Elements for AS2301 Asphalt Screeds
Location on Asphalt Screed	Outer Heater	Inner Heater	Harness	Cover
Right Hand, Main	301-7438	301-7437	313-1619	250-1076
Left Hand, Main	301-7438	301-7437	313-1618	250-1076
Right Hand Extender	301-7439	301-7440	310-4093	311-7131
Left Hand Extender	301-7439	301-7440	310-4092	311-7131
305 mm (1 ft) Extension	301-7435	N/A	309-9798	317-2177
610 mm (2 ft) Extension	301-7435	301-7435	309-9227	317-3227

Note: The harness and cover part numbers listed are for reference only. Refer to the rework instructions for modifying the existing covers and harnesses.

The new heaters can be incorporated into any section of the adaptable electrically heated front mounted screeds by using the corresponding inner heater, outer heater, and modifying both the harness and the covers for that section per the included instructions. Refer to Table 7 and Table 8.

Procedure to Rework Old Harness Assemblies for the New Main Heaters and Extender Heaters

Show/hide table

Table 9
Required Parts ⁽¹⁾ ⁽²⁾
Item	Part Number	Part Description	Qty
1	8N-1541	Socket Connector	2
2	125-7875	Heat Shrink Tube 100 mm (3.9 inch)	-
3	129-7163	Plug Connector	2

Show/hide table

^( 1 )	For each section of the heater, multiply the quantity of required parts by 2.
^( 2 )	For an entire screed, multiply the quantity of required parts by 8.

Show/hide table

Table 10
Required Tools
Tool	Part Number	Part Description	Qty
A	1U-5804	Crimp Tool	1

Note: This procedure updates the harness assembly in order to use the new heaters. The update applies to the rear mount or the front mounted screeds. This update applies to the main sections and the extenders of the screeds. Each machine has eight heaters that will need to be replaced. This update must be performed on each of these heaters.

Locate the four pin plug for the heater.

Show/hide table




Illustration 1	g01514277
(4) Wire number "1" (5) Wire number "2"

Remove the socket from wire number "1" (4) and wire number "2" (5) .
Note: Wire number "1" (4) and wire number "2" (5) are red wires. The label on these wires will have the same circuit number.

Show/hide table




Illustration 2	g01514279
(1) Socket connector (2) Heat shrink tube (3) Plug connector (4) Wire number "1" (5) Wire number "2" (6) Wire

Splice 100 mm (4 inch) of RD-12 wire (6) to wire number "1" (4) and wire number "2" (5). Hold the splice in place with a crimped metal band and solder. Cover the splice with 50 mm (2 inch) of heat shrink tube (2) .

Attach socket connector (1) to the end of wire (6). Crimp connector (1) with Tool (A) .

Install wire (6) and socket connector (1) in plug connector (3) .

Install plug connector (3) into the receptacle connector for the heater with the RD wire. Slide the connector assembly into the clip.

Show/hide table




Illustration 3	g01520486
(7) Wire number "3" (8) Wire number "4"

Remove the socket from wire number "3" (7) and wire number "4" (8) .
Note: Wire number "3" (7) and wire number "4" (8) are black wires. The label on these wires will have the same circuit number.

Show/hide table




Illustration 4	g01520494
(1) Socket connector (2) Heat shrink tube (3) Plug connector (7) Wire number "3" (8) Wire number "4" (9) Wire

Splice 100 mm (4 inch) of BK-12 wire (8) to wire number "3" (7) and wire number "4" (8). Hold the splice in place with a crimped metal band and solder. Cover the splice with 50 mm (2 inch) of heat shrink tube (2) .

Attach socket connector (1) to the end of wire (9). Crimp socket connector (1) with Tool (A) .

Install wire (9) and socket connector (1) in plug connector (3) .

Repeat Step 1 through Step 10 for the other main heater and two extender heaters.

Install plug connector (3) into the receptacle connector for the heater with the BK wire. Attach black connector assembly to the red connector assembly with cable straps.

Procedure to Rework Old Harness Assemblies for the New Heaters for the Extensions

Screed extensions that were built after 01October 2007 have new heaters and harness assemblies. These screed extensions will attach to screeds with new updated heaters and updated harness assemblies. Harness assemblies on extensions with updated heaters have single pin Deutsch connectors rather than multiple pin Deutsch connectors.

Replace the heater and harness assemblies on extensions with old wiring for use with screeds with new wiring. Refer to the tables in ""Installation for Rear Mounted Screeds" " and ""Installation for the Front Mounted Screeds" ".

In order to use extensions with new wiring on screeds with old harness assemblies, the harness assembly for the extender on the right screed and the harness assembly for the extender on the left hand screed must be updated. Either update the screed or rework the harness assemblies for the screed extension.

Show/hide table

Table 11
Required Parts
Item	Part Number	Part Description	Qty
1	8N-1541	Connector socket	4
2	129-7163	Connector plug assembly	4

Show/hide table

Table 12
Required Tools
Tool	Part Number	Part Description	Qty
A	1U-5804	Crimp Tool	1

Locate the two pin Deutsch connector on the harness assembly from the right hand extender.

Remove the sockets from the two wires.

Install connector socket (1) on each wire. Use Tool (A) to crimp connector socket (1) to the wire. Install connector socket (1) in connector plug assembly (2) .

Repeat Step 1 through Step 3 for the left hand extender harness assembly.

Procedure to Rework Old Screed Plate Covers to Work with the New Main Heater, Extender Heater, and Extension Heater with Single Wire Heaters

The harness clips on the original screed plate covers must be changed in order to relocate the clips and to allow for additional harness connectors. Modify the clips on the screed plate covers as described in ""Modification procedure for 8-16B 251-0003 Plate As " ", ""Modification procedure for 10-20B 249-6980 Plate As " ", ""Modification procedure for AS2251 250-6708 Plate As and 250-6714 Plate As " ", and ""Modification procedure for AS2301 250-1082 Plate As " ".

Note: Use the procedures below to update the harness and covers to fit the new heater elements. Use the pictures in the procedures below as a reference only.

Modification procedure for 8-16B 251-0003 Plate As .

Show/hide table




Illustration 5	g01929168
Locations of the harness clips on a 251-0003 plate

Note: Refer to Illustration 5 in order to locate the harness clips that will need to be removed from each screed plate cover on 8-16B.

The original clips must be removed from each cover as described in Illustration 5. Once the original clips are removed, grind the area that the clips were removed from in order to prepare for welding the new clips onto the cover.

Show/hide table




Illustration 6	g01929172
Locations of the harness clips on a new 311-6536 plate

Refer to Illustration 6 for placing the harness clips that will need to be welded to each screed plate cover of 8-16B.

Note: Prepare the surface of the cover for welding. Remove any paint or debris from the area that is to be welded.

Plug weld the harness clips to the screed plate cover.

Modification procedure for 10-20B 249-6980 Plate As .

Show/hide table




Illustration 7	g01930853
Locations of the harness clips on a 249-6980 plate

Note: Refer to Illustration 7 to locate the harness clips that will need to be removed from each screed plate cover of 10-20B.

The original clips must be removed from each cover as described in Illustration 5. Once the original clips are removed, grind the area that the clips were removed from in order to prepare for welding the new clips onto the cover.

Show/hide table




Illustration 8	g01930854
Locations of the harness clips on a new 311-6535 plate

Refer to Illustration 8 to place the harness clips that will need to be welded to each screed plate cover of 10-20B.

Note: Prepare the surface of the cover for welding. Remove any paint or debris from the area that is to be welded.

Plug weld the harness clips to the screed plate cover.

Modification procedure for AS2251 250-6708 Plate As and 250-6714 Plate As .

Show/hide table




Illustration 9	g01930874
Locations of the harness clips on a 250-6708 plate and a 250-6714 plate

Note: Refer to Illustration 9 to locate the harness clips that will need to be removed from each screed plate cover of AS2251.

The original clips must be removed from each cover as described in Illustration 9. Once the original clips are removed, grind the area that the clips were removed from in order to prepare for welding the new clips onto the cover.

Show/hide table




Illustration 10	g01930876
Locations of the harness clips on the new 311-6922 plate and 311-7134 plate

Refer to Illustration 10 to place the harness clips that will need to be welded to each screed plate cover of AS2251.

Note: Prepare the surface of the cover for welding. Remove any paint or debris from the area that is to be welded.

Plug weld the harness clips to the screed plate cover.

Modification procedure for AS2301 250-1082 Plate As .

Show/hide table




Illustration 11	g01930878
Locations of the harness clips on a 250-1082 plate

Note: Refer to Illustration 11 to locate the harness clips that will need to be removed from each screed plate cover of AS2301.

The original clips must be removed from each cover as described in Illustration 11. Once the original clips are removed, grind the area that the clips were removed from in order to prepare for welding the new clips onto the cover.