Table of Contents
Advertisement
OM3072 2/13
Maintenance
Refer to the Sound Attenuation System Service sec-
tion for inspection requirements.
Do not pressure wash the sound attenuation sur-
faces. Malfunction and damage may occur,
reducing the effectiveness of the attenuators.
Periodically, the attenuators need to be disassem-
bled for maintenance. Refer to Sound Attenuation
System Service for maintenance intervals. Follow the
steps below to service the attenuators.
1. Remove the cap screws securing the front
attenuator assembly to the frame. Then allow it
to swing down, then remove it by lifting it out of
the hinge. Once on the ground, the splitter
packs can be removed as a unit.
2. Remove the perforated cover to gain access to
the insulation pillow. The pillow should have a
protective cloth between the insulation and the
perforated cover.
3. The insulation should be clean, soft, and free
from debris. The insulation should be of consis-
tent density, and fill the cavity completely, not
slumping to the bottom.
NOTE: If a significant amount of damage or soiling of
any of the parts has been observed, replacement
parts
must
be
installed
performance of the parts.
4. With the insulation pillows removed, use a pres-
sure washer only on the metal parts. Remove
all of the debris, oil, or grease present on the
parts.
5. Reassemble and reinstall the pack. Repeat for
the remaining packs.
6. Position the attenuator assembly below the
truck, then raise it so it is hanging on the
hinges. Then swing the unit up into place. When
closing the attenuator assembly, a hand crush
hazard is present in between the door and body.
Be aware of hand position when closing the
doors. Install mounting hardware securely.
to
ensure
correct
Operating Instructions - Section 30
Approximate weights
Always use a lifting device that can handle the
load safely. Lifting lugs are fitted to the top of the
attenuator housings (8).
Front Door Assembly (7)- 38 kg (84 lb)
Rear Door Assembly (6) - 41 kg (90 lb)
Front Attenuator Assembly (8) - 104 kg (229 lb)
FIGURE 30-6. ENGINE BELLY PAN DOOR
OPEN
1. Seal
2. Hinge
3. Cover (Perforated)
Page 30-7
4. Mylar
5. Insulation
Advertisement
Table of Contents
