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Publication Number: FHWA-HRT-05-153
Date: December 2006

Long-Term Pavement Performance Program Falling Weight Deflectometer Maintenance Manual

Appendix: Scheduled Maintenance Lo

SCHEDULED MAINTENANCE LOG FOR FWD TRAILER
(Revised: 12 July 2005)

 

Date  
Owner  
Model No.  
Serial No.  
Hour meter/Drop counter - Incoming, Outgoing  
 
Date Insp. Initls. Maintenance Required Maint. Performed Page No./ Figure No. Comments
Hydraulic System and Related Components:
    Change hydraulic oil/filter Annually P-26/F-44  
    Inspect rubber pad on load cell Daily P-53/F-97  
    Grease load cell Monthly P-52/F-96  
    Lubricate guide rollers Weekly P-23/F-39  
    Visual inspection of excess pressure Daily P-26/F-44  
    Inspect load cell swivel operation Monthly P-50/F-92  
    Inspect load cell attaching brackets Monthly P-51/F-94  
    Lubricate upper catch assembly Weekly P-44/F-84  
    Rotate catch assembly Daily P-45/F-85  
    Check hydraulic oil level Daily P-15/F-25  
    Check guide profiles and shims Annually P-19/F-32  
    Check side cylinder bolts Every 6 months P-46/F-87  
    Check center cylinder for leaks Monthly P-35/F-65  
    Check A/B valve for leaks Monthly P-26/F-44  
    Check hydraulic lines and connections for leaks Monthly P-24/F-40  

SCHEDULED MAINTENANCE LOG FOR FWD TRAILER

(Revised: 12 July 2005)

 

    Date  
Owner  
Model No.  
Serial No.  
Hour meter/Drop counter - Incoming, Outgoing  
 
Date Insp. Initls. Maintenance Required Maint. Performed Page No./ Figure No. Comments
Hydraulic System and Related Components (Continued):
    Inspect side cylinder for leaks Monthly P-46/F-86  
    Inspect strike plate hardware Monthly P-49/F-90  
    Check center cylinder to strike plate nut Annually P-29/F-51  
    Check condition of buffers Monthly P-23/F-39  
           
           
           
           
           
           
           
           
           
           
           

SCHEDULED MAINTENANCE LOG FOR FWD TRAILER

(Revised: 12 July 2005)

 

    Date  
Owner  
Model No.  
Serial No.  
Hour meter/Drop counter - Incoming, Outgoing  
 
Electronics/Electrical Components:
    Inspect trailer battery - Clean terminals/check water level Monthly P-18/F-28  
    Inspect electronics battery (in vehicle) Monthly P-72/F-137  
    Clean ground terminals (two in trailer) Monthly P-3/F-1 and P-4/F-2  
    Inspect four proximity switches Monthly P-67/F-129  
    Inspect PS1/PS2 switches Monthly P-27/F-46  
    Clean fuse block terminals (trailer) Every 3 months P-72/F-137  
    Inspect hydraulic motor brushes Every 6 months P-25/F-43  
    Check charging plug from vehicle to trailer connection Every 3 months P-70/F-134 and 135  
    Check power control board connections Every 6 months P-18/F-29  
    Check seismic sensor connections Monthly P-71/F-136  

SCHEDULED MAINTENANCE LOG FOR FWD TRAILER

(Revised: 12 July 2005)

 

    Date  
Owner  
Model No.  
Serial No.  
Hour meter/Drop counter - Incoming, Outgoing  
 
Electronics/Electrical Components (Continued):
    Check air and infra-red sensor connections (optional equipment) Monthly  
    Clean and inspect multisignal cable Every 3 months  
    Clean inside of 9000 processor Annually P-68-69/F-131 and 132 Use extreme caution
    Check air-gap vehicle-mounted DMI Annually P-70/F-133  
    Clean connectors in electrical control box Annually P-68/F-130  
Raise/Lower Bar Assembly:
    Lubricate front pulley wheels Monthly P-57/F-105  
    Lubricate rear pulley wheels Monthly P-47/F-88  
    Check rut bar depth - adjust Annually P-59/F-109  
    Check geophone holders Monthly P-59/F-110  
    Check geophone holder springs Monthly P-61/F-113 Replace as a set
    Check geophone clamping disk Monthly P-60/F-112  

SCHEDULED MAINTENANCE LOG FOR FWD TRAILER

(Revised: 12 July 2005)

 

    Date  
Owner  
Model No.  
Serial No.  
Hour meter/Drop counter - Incoming, Outgoing  
 
Date Insp. Initls. Maintenance Required Maint. Performed Page No./ Figure No. Comments
Raise/Lower Bar Assembly (Continued):
    Lubricate foam guide Monthly P-60/F-112  
    Raise/lower bar cable (inspect) Monthly P-57/F-105  
    Raise/lower bar rear guide and bolt Annually P-55/F-102 Re-apply thread locker
           
           
           
           
           
           
           
           
           
           
           
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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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