Group:
Bulletin No.:
Issue Date:

TECHNICAL

SERVICE

61-Cab and Body
SB-15-019
06-17-2015

BULLETIN

11MY-15MY CONVENTIONAL CRACKED HOOD REPAIR
OVERVIEW
Reinforcement brackets and fiberglass repair methods have been made available to address hood crack concerns.
In the event a subject vehicle experiences cracking of the hood near the hinges, this repair procedure should be
used to address this condition. While these repair methods may be effective at repairing a hood that was
damaged from impact, impact damage repair is not warrantable. Hoods should be inspected for damage prior
to performing this procedure.
NOTE: This procedure is provided as technical information and is not an authorization for a warranty repair.
SUBJECT VEHICLES
2011MY – 2015MY Hino Conventional Trucks
BEFORE YOU BEGIN:
- Read and understand all instructions and procedures before you begin the work.
- Read and follow all WARNINGS and NOTICES set forth in this publication. These alerts help to avoid damage
to components, serious personal injury, or both.
- Park the vehicle on a flat, level and solid surface.
- Place the gear shift lever in "Neutral" or "Park".
- Apply the parking brake firmly and confirm parking brake activation.
- Turn off the engine and remove the key from the ignition switch.
- Always wear safety glasses or goggles to protect your eyes.
- A dust mask must be worn when sanding or grinding fiberglass material.
- Place wheel chocks in front of and behind all the wheels to prevent the vehicle from moving.
PARTS
PART NUMBER
53415E0020
53416E0020
53321E0070
SZ10910070
PIT194
P30018
P3353

DESCRIPTION
QUANTITY
REINFORCEMENT, HOOD HINGE LH
1
REINFORCEMENT, HOOD HINGE RH
1
REINFORCEMENT, HOOD
2
BOLT
8
PLEXUS MA830GB ADHESIVE*
2
PLEXUS 50ML CARTRIDGE GUN**
1
PLEXUS MIXING NOZZLE
2
EPOXY BASED FIBERGLASS RESIN
As Needed
7.5 OUNCE FIBERGLASS CLOTH
As Needed
* One 50ml tube of adhesive can repair one side (LH or RH) of the hood.
** This cartridge gun is considered a general tool and should not be submitted for warranty reimbursement.
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BULLETIN

VEHICLE PREPARATION:
1. Park the vehicle on level ground.

2. Confirm the engine is stopped, the
ignition switch in the off (LOCK) position
and the key is removed.

3. Apply the parking brake.

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4. Chock the front wheels.

REPAIR PROCEDURE

1. The following photographs are examples of cracking that you may see around the hinge
plate or grille opening that can be repaired.
Hinge Plate Area

Corner of Grille Opening

2. Following the cab section of the Chassis
Workshop Manual, remove the grille from
the hood. Retain the grille for reassembly.
NOTICE: Use only hand tools when removing
the hood grille to prevent damage.

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BULLETIN

3. Following the cab section of the Chassis
Workshop Manual, remove the hood from
the vehicle and place in the work area.
Position upside down to access the hinge
areas. Ensure the hood surface is protected
from damage.
WARNING: Never work under the hood
unless the hood is properly supported.
Serious personal injury can occur.
4. Remove the hinges from the hood by
removing the three retaining bolts on each
side. Discard the old retaining bolts and
retain the hinges for reassembly.

5. Remove the old hinge reinforcement
plates from the hood by removing the bolts
from each side. Discard the old retaining
bolts and old hinge reinforcement plates.

Reinforcement Plate
6. Drill out the rivets holding the hinge
backing plates in place. The backing plates
will be reused. The rivets are being removed
to allow the new reinforcements to sit flush
against the hood.

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BULLETIN

7. Inspect the area around the hood hinges
and grille opening for stress cracks. These
will need to be repaired prior to installing the
hood reinforcements.

8. Before beginning the repair procedure,
clean the area around any cracks using
surface prep solvent to remove any
contaminants.
NOTICE: Failure to remove contaminants
prior to grinding and sanding the material
can affect adhesion.

9. Working from the inside of the hood, using an angle grinder or die grinder, chamfer the
hood material on both sides of the crack. If the material is splintered and loose, remove as
much of this loose material as possible to ensure a solid surface for bonding the new
fiberglass. Refer to the examples in the photographs below.
WARNING: ALWAYS wear eye protection, a face mask, gloves and protective clothing when
grinding, drilling, and sanding fiberglass, epoxy resin and adhesive materials. Fiberglass
materials may cause mouth, nose, throat, skin and eye irritation. Epoxy resin and adhesive
materials may cause skin irritation and eye irritation.
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Before Grinding

After Grinding

Before Grinding

After Grinding

10. Using 80 grit sandpaper, deglaze the
area surrounding the crack. This area should
extend at least two inches beyond the crack
on all sides, if possible. Remove sanding dust
with a clean lint free rag.

Deglazed Area

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11. Cut four layers of fiberglass cloth to fit
the area to be repaired. The fiberglass cloth
should extend at least two inches beyond
the damaged area on all sides, if possible.

12. Always read the manufacturer’s
instructions and warnings in mixing the
fiberglass resin. Before positioning the first
layer of fiberglass cloth, apply a coat of the
mixed resin, using a brush.

13. Ensure no air pockets are present under
the first fiberglass cloth before applying
additional resin and the next piece of
fiberglass cloth. Repeat this process for each
layer. Ensure resin is applied over the fourth
and final layer. Allow the resin to cure.
Repeat steps 7-13 for any remaining cracks.

14. Once the fiberglass has cured, trim or
sand the excess as needed. Ensure the new
hood hinge reinforcement plates will fit
properly over any repaired areas. Drill out
any mounting holes that may have been
covered.
WARNING: ALWAYS wear eye protection, a
face mask, gloves and protective clothing
when grinding, drilling, and sanding
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fiberglass, epoxy resin and adhesive
materials. Fiberglass materials may cause
mouth, nose, throat, skin and eye irritation.
Epoxy resin and adhesive materials may
cause skin irritation and eye irritation.
15. Using surface prep solvent, wipe the highlighted areas of the hood on both driver and
passenger sides to remove any contaminants.
NOTICE: Failure to remove contaminants can affect reinforcement bracket adhesion.

16. Using 80 grit sandpaper, deglaze the
areas of the hood that were cleaned with
solvent in step 15. Remove sanding dust with
a clean lint free rag.
WARNING: ALWAYS wear eye protection, a
face mask, gloves and protective clothing
when grinding, drilling, and sanding
fiberglass, epoxy resin and adhesive
materials. Fiberglass materials may cause
mouth, nose, throat, skin and eye irritation.
Epoxy resin and adhesive materials may
cause skin irritation and eye irritation.

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17. Wipe the mating surface of the new hood reinforcements using surface prep solvent.

18. Prepare the (PIT194) MA830GB (50ml) adhesive and nozzle, new reinforcements, hood
hinges, and new bolts. This adhesive is fast curing. Working time is 4 to 6 minutes. The
adhesive will cure in the mixing nozzle, requiring that the reinforcements be installed one side
at a time. Have a torque wrench set to 32 lb-ft (43Nm) ready.

19. The highlighted portions in the
illustration to the right shows where the
adhesive is to be applied on the hinge
reinforcements. For appropriate adhesion,
25 grams of adhesive must be applied to
each bracket. This will equate to
approximately two tablespoons of adhesive
per bracket. Trim the mixing nozzle to ¼ inch
to allow a sufficient bead of adhesive to be
applied.

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20. Begin dispensing the (PIT194) MA830GB
adhesive. Ensure the adhesive is mixing in
the nozzle into an even gray color. Dispense
adhesive onto scrap cardboard first to
ensure consistency. On the first use, it may
be necessary to dispense more adhesive
than expected. After this point, do not allow
the adhesive to rest more than four minutes
or it will cure in the mixing nozzle.

21. Apply adhesive to the driver side
reinforcement as indicated in step 19.
Position the driver side reinforcement on
the hood along with the hood hinges and
tighten the four new module bolts to the
specified torque. Repeat this step for the
passenger side reinforcement.
Specified Torque: 32 lb-ft(43 Nm)

22. Without pausing, proceed to apply
adhesive to the small rectangular
reinforcements. These do not have a specific
orientation with regard to the location of
the hole. Position the reinforcement on the
driver side on the hood and allow curing.
Refer to the photograph to the right for
location. Next install the passenger side
reinforcement.
NOTICE: The adhesive should be left
undisturbed for a minimum of 20 minutes
before proceeding with hood reinstallation.

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23. Following the Cab section of the Chassis
Workshop Manual, reinstall the hood on the
vehicle.
WARNING: Never work under the hood
unless the hood is properly supported.
Serious personal injury can occur.

24. Following the Cab section of the Chassis
Workshop Manual, reinstall the grille to the
hood.
NOTICE: Only use hand tools when installing
the grille and ensure the fasteners are
torqued to the specification listed on the
grille label. If a new hood grille is being
installed, please reference SB-14-020.

FINAL INSPECTION PROCEDURE:
1. To complete this Technical Service Bulletin, review the bulletin and confirm the following:
 Any cracks in the hood material have been repaired
 All four reinforcements are installed properly
 All fasteners are tightened to the specified torque.
 Hood latches are engaged.

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06-17-2015

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NOTE: This repair may be eligible for reimbursement if a product failure was experienced within the time and
mileage limits of the applicable warranty coverage. Reimbursement is obtained via normal claim handling
process.
CLAIM APPLICATION:
a) Labor Charge:
- Reinforcement Install: 2.1 Hours
- Crack Repair: 0.6 Hours Per Crack
b) Warranty Code: 71299
c) Trouble Code: 51
d) Operation Code: 71250AOT
e) Part Number: 53310-E0115

NOTICE: One 50ml tube of adhesive can repair one side (LH or RH) of the hood.
NOTICE: This cartridge gun is considered a general tool and should not be submitted for warranty
reimbursement.

REFERENCE:
ITW Plexus Adhesives – www.itwplexus.com
US Composites Fiberglass – www.uscomposites.com

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