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ROCKER ARMS AND ROCKER ARM SHAFTS
SERVICE ADJUSTMENT PROCEDURE
Y2OGAOA
Bleeding Auto Lash Adjuster
CAUTION
Since the auto-lash adjuster is a precision part, use care to
prevent entry of foreign substances such as dirt. Do not
attempt disassembly of the auto-lash adjuster. Use clean Die-
sel .fuel for cleaning the auto-lash adjuster.
1.
Individual unit
1) Combine the auto-lash adjuster and the special tool
(09246-32100), as shown in illustration, and immerse
in Diesel fuel.
2)
Using a special tool (09246-32200), lightly hold down
the steel ball and move the plunger up and down 4 or
5 times.
3)
Remove the air bleed wire and push the plunger strongly
by finger.
If it moves even slightly, repeat steps 1) and 2). If the
plunger moves even after the steps have been repeated
several times, replace the auto-lash adjuster.
CAUTION
The fully bleed auto-lash adjuster should be held in an up-right
position to make sure that the Diesel fuel in the adjuster is
not spilled. Use care to make sure that dust and other foreign
substances do not contaminate the adjuster.
2.
Engine assembly.
After installing in the engine, if there is air in the auto-lash
adjuster, abnormal noises may occur. If this happens, the air
can be bleed and the noise eliminated by slowly racing the
engine from idling speed to 3,000 rpm (for about 1 minute).
09246-32200
3,000 rpm
Idling speed
1--
20Y062
Idling speed
----
I·
About 1 minute
20Y063
Auto Lash Adjuster Leak-Down Test
Set a bleed auto-lash adjuster in a special tool (09246-32300).
,
After the plunger has'fallen slightly [0.2-0.5 mm (0.008-0.020
in.)], measure the subsequent fall-down rate.
Standard leak-down rate: 3 to 20 seconds/mm [Gas oil, oil
temperature 15-25°C (59-77°F)].
20-34
09246-32300
Auto-lash
adjuster
20Y064
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