Procedure to Rework Heater Hold Downs and Replace Heaters for Certain SE60 VT XW Screeds {1408} Caterpillar

Asphalt Screed

SE60VT XW (S/N: E991-146; TLW1-286)

Introduction

This special instruction is intended to provide information on how to replace the heaters, hold downs, and covers on the above listed screeds. The new design intended to prevent ground faults. The new heaters are essentially a drop-in replacement for the old, but new covers are required due to the slightly larger and taller heater to electrical cable transition "cup". The new heater hold downs provide better contact between the screed plates and the heaters, preventing thermal hot spots in the heaters and improving heater performance.

Screeds S/N:TLW281-286 and ; S/N:E99108-146 will not need the new hold downs, they were assembled on the machine at the factory. These machines will not need the screeds plates dropped, all work can be done with the screed plates installed.

Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.

Reference Section

Reference: Refer to Specifications , SENR3130 , "Torque Specifications".

Reference: Refer to Disassembly and Assembly Manual , UENR4559 , "Heating Element (Main Screed) - Remove and Install".

Reference: Refer to Disassembly and Assembly Manual , UENR4559 , "Heating Element (Extender) - Remove and Install".

Reference: Refer to Disassembly and Assembly Manual , UENR4559 , "Screed Plate (Main) - Remove and Install".

Reference: Refer to Disassembly and Assembly Manual , UENR4559 , "Screed Plate (Extender) - Remove and Install".

Reference: Special Instruction , REHS9161 , "Procedure to Properly Connect and Disconnect the High-Voltage Connectors on "F" Series Asphalt Pavers"

Safety Section

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Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.

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Failure to follow all safety guidelines prescribed in this document and by governing authorities and regulatory agencies may result in severe injury or death of personnel or machine damage.

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When removing a major component or attachment, ensure that it is properly blocked or secured before removing mounting hardware. An assembly that is disconnected without proper blocking may shift or fall, resulting in serious injury or death of personnel or machine damage.

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Personal injury or death can result from improper maintenance procedures. To avoid injury or death, follow the procedures exactly as stated below.

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Personal injury can result from improper handling of chemicals. Make sure you use all the necessary protective equipment required to do the job. Make sure that you read and understand all directions and hazards described on the labels and material safety data sheet of any chemical that is used. Observe all safety precautions recommended by the chemical manufacturer for handling, storage, and disposal of chemicals.

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Climbing equipment may be required to access this service point. Refer to the Operation and Maintenance Manual, "Mounting and Dismounting" topic for safety information.

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Before servicing/performing maintenance on the machine, electrical power must be physically disconnected; battery plugs must be disconnected from the batteries, or the trailing cable must be unplugged, and warning tags and padlocks shall be applied by a certified electrician. Certified electricians shall perform or direct any electrical work, including any energized testing, repair work in controllers, motors, or other approved compartments, and shall insure that all compartments are properly closed and inspected prior to re-energization. All applicable lock out and tag out procedures must be followed.

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Do not operate the machine if any guards or covers are missing or inadequately secured. Personnel could be seriously injured or machine damage may occur.

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Observe the safe working load limits of all lifting and blocking devices and keep a safe distance from suspended/blocked loads. Personnel may be seriously injured or killed by falling loads.

Required Parts

Installation Procedure

Reference: Refer to Disassembly and Assembly Manual , UENR4559 , "Heating Element (Main Screed) - Remove and Install".

Reference: Refer to Disassembly and Assembly Manual , UENR4559 , "Heating Element (Extender) - Remove and Install".

Reference: Refer to Disassembly and Assembly Manual , UENR4559 , "Screed Plate (Main) - Remove and Install".

Reference: Refer to Disassembly and Assembly Manual , UENR4559 , "Screed Plate (Extender) - Remove and Install".

1. The temperature sensor and studs can be left in the screed plate, assuming the screed plates are to be reused.
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   Illustration 1	g06376856
   Right-hand side (A) Cover (B) Bolt (C) Washer

2. Remove two bolts (B) and two washers (C) to remove cover (A). Discard the washers (C) and retain the bolts (B). Follow the same procedure for the left-hand side cover.
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   Illustration 2	g06395195
   (D) Screed Plate (E) Shaft (F) Clamp Plate Assembly (G) Locknut (H) Hard Washer (P) Spring

3. Remove clamp plate assembly (F), locknut (G), hard washer (H), and spring (P) from screed plate (D) as shown in Illustration 2.

4. Discard plates and front aluminum heater hold down "bobins". Retain hard washers (H), springs (P), and locknuts (G) for later installation.

5. Discard 486-4558 Plate and one 039-8557 Washer from center retaining bolt.
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   Illustration 3	g06395119
   (1) 553-0224 Clamp Plate (2) 553-0229 Clamp Plate (4) 7K-1181 Cable Strap (5) 553-0223 Clamp Plate As (14) 6V-7687 Locknut (15) 468-7390 Spring (16) 8T-4821 Washer (21) 559-5543 Screed Heater As (22) 559-5540 Screed Heater As (23) 559-5542 Screed Heater As (24) 559-5541 Screed Heater As

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   Illustration 4	g06395151
   (14) 6V-7687 Locknut (15) 468-7390 Spring (16) 8T-4821 Washer (D4) 14.0 ± 0.5 mm (0.55 ± 0.02 inch)

   Note: The split main plate design is shown in the Illustration 3, all parts are the same for older models with a single main screed plate.

6. Use cable straps (4) to secure screed heater assembly (3), screed heater assembly (6), screed heater assembly (21), and screed heater (23) as shown in Illustration 3.

7. Assemble clamp plate (1) clamp (2), and two clamp plate assemblies (5) as shown in Illustration 3.

8. Install four washers (16), four springs (15), and four locknuts (14). Tighten locknuts (14) as per dimension shown in Illustration 4.
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   Illustration 5	g06395184
   (11) 553-1180 Tube (L) Locknut (M) Hard Washer (N) Spring (D3) 17.25 ± 0.50 mm (0.679 ± 0.020 inch)

9. Install 18 tubes (11) and 18 springs (N), 18 hard washers (M), and 18 locknuts (L). Tighten locknuts (L) and springs (N) as per dimension shown in Illustration 5.
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   Illustration 6	g06355810
   (J) Shaft (K) Clamp Plate Assembly (L) Locknut (M) Hard Washer (N) Spring (S) Extender Plate

10. Remove clamp plate assembly (K), shaft (J), locknut (L), hard washer (M), and spring (N) from each extender plate (S) as shown in Illustration 6. Save the 039-8557 Washer.
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    Illustration 7	g06355812
    Left-hand side (3) 559-5537 Screed Heater As (12) 559-5539 Screed Heater As

11. Install screed heater assembly (3) and screed heater assembly (12) as shown in Illustration 7.
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    Illustration 8	g06356254
    Right-hand side (6) 559-5538 Screed Heater As (13) 559-5536 Screed Heater As

12. Install screed heater assembly (6) and screed heater assembly (13) as shown in Illustration 7.
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    Illustration 9	g06355814
    Left-hand side (14) 6V-7687 Locknut (15) 468-7390 Spring (16) 8T-4821 Washer (L) Locknut (M) Hard Washer (N) Spring

13. Install washer (16), spring (15), and locknut (14) to the end of front stud as shown in Illustration 9.
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    Illustration 10	g06356299
    Right-hand side (14) 6V-7687 Locknut (15) 468-7390 Spring (16) 8T-4821 Washer (L) Locknut (M) Hard Washer (N) Spring

14. Install washer (16), spring (15), and locknut (14) to the end of front stud as shown in Illustration 10.
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    Illustration 11	g06355861
    (D4) 14.0 ± 0.5 mm (0.55 ± 0.02 inch)

15. Tighten the spring as per dimensions shown in Illustration 11.

16. Using the screed plate assembly process, raise the screed plates back up under the screed.

17. Route the heater harness in the same path as previous heater harness. Use new tie straps to retain heater leads as previously routed.

18. Tighten the connectors to 10.5 ± 0.3 N·m (93 ± 3 lb in), retaining with lockwire. Refer to Special Instruction , REHS9161 , "Procedure to Properly Connect and Disconnect the High-Voltage Connectors on "F" Series Asphalt Pavers" if required.
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    Illustration 12	g06379804
    Left-hand side (18) 555-7088 Cover (19) 8T-4121 Hard Washer (E) Bolt

19. Install left-hand side access cover (18) using bolts (E) which was saved in Step 2 and hard washers (19). Install 555-7089 Cover (Right-hand side) (20) by following the same procedure.

20. Heated endgate heaters will need to be replaced if present. Use same routing as current endgate heater.

21. Tighten the connectors to 10.5 ± 0.3 N·m (93 ± 3 lb in), retaining with lockwire. Refer to Special Instruction , REHS9161 , "Procedure to Properly Connect and Disconnect the High-Voltage Connectors on "F" Series Asphalt Pavers" if required.
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    Illustration 13	g06392926
    Typical screed heater assembly (25) 535-8875 Screed Heater As

22. Install four screed heater assemblies (25) as shown in Illustration 13.