FSB 237-021v2
Service Bulletin Details
Public Details for: FSB 237-021v2
Revision: exhaust rocker compression brake piston, repair
- 9999 -
Models from 9999
9999 VOLVO VAH |
9999 VOLVO VHD |
9999 VOLVO VN |
9999 VOLVO VT |
Volvo Trucks North America Greensboro, NC USA Field Service Bulletin Trucks Date This Field Service Bulletin (FSB) replaces VOLVO bulletin “Exhaust Rocker Compression Brake Piston, Repair”, PV729-FSB 213–002_V (USA138519491) dated 01/2017. 6.2021 Group No. 213 002 Release Page 02 1(11) Exhaust Rocker Compression Brake Piston, Repair VN, VAH, VHD, VT FSB 213-002, Exhaust Rocker Compression Brake Piston, Repair (June 2021) For VOLVO VN, VAH, VHD, and VT trucks built from 01/01/2007 to 07/06/2020, a repair procedure and new tools have been created to repair the exhaust rocker compression brake pistons. In some instances the exhaust rocker piston cap screw may become loose and back out causing loss of engine compression, or a mechanical injector Diagnostic Trouble Code (DTC). There are two repair strategies outlined in this document. The first and updated repair strategy is to replace the rocker arms with updated parts. The updated rocker arms contain a welded piston cap which reduces failure rate and increases longevity of the repair. This repair strategy is to be used on all under warranty repairs. Note: If the vehicle is out of warranty, either repair strategy is acceptable. The second repair requires the removal of the exhaust rocker piston, removal of the exhaust rocker piston cap and internal components for cleaning. Ensure the rocker arm and exhaust rocker compression brake piston are recorded as a pair during this repair procedure for proper installation. After cleaning, the internal components are re-installed, thread locker (LOCTITE 638) is applied to the cap, and the cap is tightened with special tooling to ensure the proper torque is applied. See the repair parts section for special tooling part numbers. Follow one of the repairs procedures outlined in this Field Service Bulletin (FSB) to repair the vehicle. PV776-FSB213-002_V USA156922222 Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 Repair procedure Decommissioning the Truck for Repair You must read and understand the precautions and guidelines in Service Information, group 20, "General Safety Practices, Engine" before performing this procedure. If you are not properly trained and certified in this procedure, ask your supervisor for training before you perform it. Note: Information is subject to change without notice. Illustrations are used for reference only and can differ slightly from the actual vehicle being serviced. However, key components addressed in this information are represented as accurately as possible. Repair 1 – Replacing the Exhaust Rockers with updated parts. Required Parts Item Description Part Number 1 Exhaust Rockers See impact for VIN Specific Part Number 1 Remove and replace the rocker arm as per Impact operation 2145-03-02-01 Rocker Arm, Replacement. Repair 2 – Repairing Exhaust Rockers Required Tools Item Description Part Number 1 Retainer Tool 88800569 2 Assembly Tool 88800564 W2118926 Page 2(11) Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 1 Park the vehicle on a flat and level surface. 2 Apply the parking brake. 3 Place the transmission in neutral or park. 4 Chock the front wheels.. W7086748 5 Disconnect the cable from the battery’s negative terminal. W3086747 Page 3(11) Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 Exhaust Rocker Compression Brake Piston Repair Note: Do not use air impact tools for any part of this repair procedure. 1 Remove the exhaust rocker compression brake piston from the rocker arm. Note: Record the rocker arm and the exhaust rocker compression brake piston as a matched pair for installation purposes. 2 Place the Retainer Tool (part number 88800569) in a vise as shown in the figure below. Note: Do not secure the tool in the vise at this time. W2118927 3 Measure the diameter of the exhaust rocker compression brake piston to determine the appropriate tool opening to be used in this repair procedure. Note: The exhaust rocker compression brake piston diameter will be dimension (A) 28 mm (1.10 in) or (B) 30 mm (1.18 in). W2118928 Page 4(11) Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 4 Position the exhaust rocker compression brake piston in the retainer tool as shown in the figure below. The appropriate opening sizes are (A) 28 mm (1.10 in) or (B) 30 mm (1.18 in). Note: Ensure the exhaust rocker compression brake piston protrudes approximately 6.35 mm (0.25 in) above the surface of the tool. W2118929 5 Secure the exhaust rocker compression brake piston and the retainer tool in the vise. Note: Apply enough pressure to the jaws of the vise to prevent the exhaust rocker compression brake piston from rotating inside the tool when torque is applied to the cap. 6 Using Assembly Tool (88800564) and hand tools, remove the cap from the exhaust rocker compression brake piston housing. Note: Do not use air impact tools for this repair procedure. W2118930 Page 5(11) Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 7 Remove the internal components from the exhaust rocker compression brake piston housing. Note: The internal components of exhaust rocker compression brake piston are very small and could be easily misplaced when the cap is removed. W2118931 8 Using brake cleaner, clean the internal components and the threads on the cap. Store the internal components and cap in a secure location for installation. W2118932 Page 6(11) Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 9 Using compressed air, blow out the inside of the exhaust rocker compression brake piston housing as shown. W2118934 10 Ensure the drain hole in the bottom of the exhaust rocker compression brake piston housing is clean and clear of any debris. W2118933 Page 7(11) Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 11 Install the internal components in the exhaust rocker compression brake piston housing. W2118935 12 Position the cap in the exhaust rocker compression brake piston housing, then rotate the cap one full turn until it starts to thread. Note: Due to pressure from internal spring compression, slight pressure on the cap is required to ensure the cap turns smoothly in the exhaust rocker compression brake piston housing. 13 Apply one drop of thread locker (LOCTITE 270) in (4) places (90 degrees from each other) on the exhaust rocker compression brake piston cap. W2118936 Page 8(11) Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 14 Using a hand tool and Assembly Tool (88800564), tighten the cap until it bottoms out in the exhaust rocker compression brake piston housing. Note: Use hand tools only, do not use air impact tools. 15 Using a torque wrench with Assembly Tool (88800564) tighten the cap to 30 ± 3 Nm (22 ± 2 ft-lb). W2118937 16 Remove the exhaust rocker compression brake piston from the retainer tool. 17 Install the exhaust rocker compression brake piston in the rocker arm as previously recorded. 18 Repeat steps 2 through 17 for the remaining exhaust rocker compression brake pistons that require repair. Page 9(11) Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 Commissioning the Truck for Operation 1 Connect the battery cable to the negative (ground) terminal. W3086758 2 Remove the wheel chocks. W7086759 Page 10(11) Volvo Trucks North America Field Service Bulletin Date 6.2021 Group No. Release 213 002 02 Reimbursement This repair may be eligible for reimbursement if a product failure was experienced within time and mileage limits of the applicable Warranty coverage. Reimbursement is obtained via the normal claim handling process. UCHP Reimbursement Claim Type (used only when uploading from the Dealer Bus. Sys.) 01 Labor Code Repair 1 Rocker Arm, Replacement Repair 2 Primary Labor Code (Exhaust Rocker Compression Brake Piston, Repair), per piston Causal Part 2145-03-02-01 Varies 4.0 to 7.0 hrs. 2132-16-09-01 0.2 hrs. Note: Use the part number of your exhaust rocker to file a claim. VOLVO Trucks North America reserves the right to make any changes in design or to make additions to or upon its products without incurring any obligations to install the same on vehicles previously built. Page 11(11)