OM3072 2/13 Operating Instructions - Section 30
Page 30-9
Rear Engine Compartment Enclosure
General
There are acoustic panels located on the lower struc-
ture (4, Figure 30-8) and a discharge attenuator (3)
fitted into the horse collar opening. The entire assem-
bly is isolated from the engine module.
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 attenuator housing. 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. The insulation should be
clean, soft, and free from debris. The insulation
should be of consistent density, and fill the cav-
ity completely, not slumping to the bottom.
Remove any debris, oil, or grease present in the
system as required.
NOTE: If a significant amount of damage or soiling of
any of the parts has been observed, replacement
parts must be installed to ensure correct
performance of the parts.
3. With the insulation pillow removed, Uue a pres-
sure washer only on the metal parts. Remove
all of the debris, oil, or grease present on the
parts.
4. Reassemble and reinstall the splitter. Repeat
for the remaining splitters.
Approximate weights
Always use a lifting device that can handle the
load safely. Lifting lugs are fitted to the top of the
attenuator housings.
Rear engine discharge attenuator - 151 kg (332 lb)
FIGURE 30-8. REAR ENGINE ENCLOSURE
1. Mud Flap
2. Seals
3. Attenuator
4. Lower Structure
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