Air Inlet And Exhaust System; Valve Lash - Adjust - Perkins 4008-30 SD8 Systems Operation, Testing And Adjustment

18

Air Inlet and Exhaust System

Air Inlet and Exhaust
System

Valve Lash - Adjust

Table 1
Required Tools
Tool Part Number
Crankshaft Turning Tool
A SE253
- Feeler gauge
B
NOTICE
Only qualified service personel should perform this
maintenance. Refer to the Service Manual or your au-
thorized Perkins dealer or your Perkins distributor for
the complete valve lash adjustment procedure.
Operation of Perkins engines with incorrect valve
lash can reduce engine efficiency, and also reduce
engine component life.
Ensure that the engine cannot be started while
this maintenance is being performed. To help pre-
vent possible injury, do not use the starting motor
to turn the flywheel.
Hot engine components can cause burns. Allow
additional time for the engine to cool before
measuring/adjusting valve lash clearance.
Note: The valve bridges must be set before the
valve lash is adjusted.
Table 2
Top Center Position
1-8
4-5
i06512664
Qty
Part Name
1
1
Eight cylinder engine
Engine cylinder with valves on the rock
Illustration 5
Eight cylinder engine
(A) Inlet valve
(B) Exhaust valve
Ensure that all power is disconnected to the engine.
Illustration 6
Typical example
1. Remove the capscrews (1).
2. Remove the rocker cover (2).
3. Remove the joint (not shown).
4. Repeat steps 1 through 3 for the remaining rocker
covers.
For 4008-30 engine, set the valve lash in the
sequence that is shown in the table 2 .
Set the bridge adjustment and set valve
8
5
M0064276
g01359594
g01241573
lash.
1
4
(continued)