SERVICE BULLETIN
DATE: 9/25/2025
SUBJ: Hot Box Verification and Performance Improvement Updates 9-25-2025
Machine Model: HB4T Hot Box
Serial Numbers: HB4T-473042----HB4T-494890
Action Requested: Immediate Inspection and Correction
Please contact Rapid Response for details on your serial numbers and updates needed.
Each unit is unique depending on the options selected on equipment.
Parts Required: All Units require this:
Fuel fitting to check/replace if it is the wrong part.
| 6801-6-6 NOW | ADAPTER, ELBOW, 90 deg, -6JIC/ -6 O-RING | A/R | $6.19 |
| 1032681 | ASSEMBLY, DIODE, 13A | 4 | $10.00 |
Communication Cable, needed to load the latest 105 code with Rapid Response.
Washdown pump (if option is present) Please order (1) #985043
Washdown pump decal (if option is present) Please order, (1) #1032107 Decal
Issue Description: Throughout initial testing and production using hot box units, several issues and performance improvement items have been identified. LeeBoy intends to make these improvements across all early production hot boxes to improve customer satisfaction and show support for early adopters to our products.
It should also be noted that current overnight heat is intended to slow temperature loss over time, not to reheat cold asphalt to operating temperatures. Please ensure end users are aware of the intended functionality.
Action Detail:
Replace diodes, please order in (4)
Update code and setpoints REV 105, Rapid Response will assist loading code. Need Plus One service tool. Fuel System Verification, check orifice fitting fuel tank and see picture below.
Washdown pump- replace with improved pump and install warning decal
4 Diodes to replace and location front tongue compartment.
Decal is installed on the solvent tank top left of the fill cap .
Please file a Campaign warranty for parts and labor for repairs. Campaign # 925 HOT BOX IMPROVEMENTS 925. Labor should only be around two hours for planning purposes.
Contact Rapid Response,support@leeboy.zendesk.com. 844 205 5499 for the code update and updates on each unit that are required.
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