TICO Document: SFN20230925A (formerly TPS 004-003)
Complication: Some windshields on the new cabs are cracking due to excessive force.
Units Affected: All 2017 and newer cabs
Description of Procedure: Locate and eliminate the excessive force applied to the windshield glass.
Parts Required: 121369
Planned Labor: 90 Minutes
Follow the step guide to determine the cause of force on the glass.
Instructions:
Place a 4’ level flat across the front surface of the cab between the windshield and the panel cut-outs. Record the deflection in the cab by measuring the distance at the end of the straight edge to the cab surface.
1A If the distance is more than 1/8” of deflection, then proceed with the solution.
Inspect the inside edge of the cab opening around the windshield, checking for uneven cuts causing the glass to bind in the opening or have uneven surfaces causing pressure points. Measurements 35” X 54.63”.
2A If inconsistencies are found in the cab opening edge. Repair fiberglass to meet manufacturing standards.
2B If excessive bending torque is found on the front wall of the cab, proceed with the next steps.
Procedure:
Check for the dash frame impacting the inside front of the cab, causing it to bow out.
If found, dash components impact the front of the cab. Loosen dash support bolts at the cab floor to slide the dash assembly back away from the front of the cab.
Retighten bolts to secure the floor.
Re-measure deflection in front of the cab.
NOTE: If the cab continues to bow and the dash is not applying pressure, continue to the next procedure to relax and secure the cab shell to the cab floor. Click here.
Machine Index Affected: