DETROIT DIESEL 53
3.2
AIR SILENCER
In-Line Engines
The air silencer (Fig. I) is attached to the intake side of the blower housing to reduce the sound level of the air entering
the blower. A perforated sheet metal partition divides the silencer into two sections. The engine side of the partition and
the outer shell forms an air duct the entire length of the silencer. Air enters this duct from both ends and flows to the
blower intake opening at the center. The area between the partition and the outer side of the silencer is filled with sound
absorbent, flame-proof, felted cotton waste.
An air intake (blower) screen is used between the air silencer and the blower housing to prevent foreign objects from
entering the blower.
Remove and Install Air Silencer
While no servicing is required on the air silencer, it may be necessary at times to remove it to clean or replace the blower
screen or to perform other service operations.
1. Support the silencer and remove the attaching bolts and lock washers. Then remove the silencer and the blower
screen.
Fig. 1 - Air Silencer Mounted on In-Line Engine
2.
Clean the blower screen with fuel oil and dry it with compressed air.
4. Place the lock washers over the bolts and slide the bolts through the bolt holes in the silencer.
5. Place the blower screen (In-line engines) over the projecting bolts and position the silencer against the blower
housing. Then tighten the bolts.
April, 1971
Sec 3.2 Page 1
