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Mack ASET AC - Camshaft Core Plug Installation; Camshaft Idler Gear Installation

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Page 308
REPAIR INSTRUCTIONS, PART 1
Camshaft Core Plug Installation
[213]
After the camshaft is installed, install the core
plug.
1. Position the core plug onto the core plug
installation tool J 42490 (used with J 8092
driver handle). Refer to Figure 352.
352
Figure 352 — Camshaft Core Plug Installation Tool
2. Position the core plug in the cylinder block.
3. Drive the core plug into place by striking the
installation tool with a hammer (Figure 353)
until the core plug is seated. The core plug is
fully seated when the step in the installation
tool bottoms against the block.
353
Figure 353 — Camshaft Core Plug Installation
Camshaft Idler Gear Installation
[213 DE]
Before installing the idler gear/hub assembly,
determine which is the top mounting hole on the
hub.
The idler gear is held in place with a flanged hub
mounted to the cylinder block by three bolts.
Although the bolt-mounting pattern may appear
symmetrical, it is not. The non-symmetrical
mounting pattern ensures that oil feed passages
in the hub will be properly aligned with the oil feed
passage in the cylinder block, which lubricates
the idler gear hub bushing.
To aid in aligning the hub to the mounting holes in
the cylinder block, at the 12-o’clock position
(engine upright), the hub mounting bolt hole is
identified by the word “UP” steel-stamped just
below the mounting hole.
1. With the engine in an upright position, place
the idler hub in position against the engine
block and verify good alignment with the
mounting bolt holes in the block
(Figure 354).
354
Figure 354 — Hub Correctly Positioned on Block
5-111.bk Page 308 Monday, July 10, 2006 2:26 PM

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