DAF CF65 Series Service Manual page 339

4
CF65/75/85 series
Preventing the exhaust valve from opening
too far
Inside the set screw (10) is a spring-loaded pin.
This pin protrudes approx. 2.7 mm from the set
screw (10).
The operating piston (3) has a hole which is
closed by the pin in the set screw (10).
If the operating piston (3) is hydraulically moved
too far down, the hole in the operating piston (3)
will no longer be closed. Oil in the high-pressure
area escapes via the hole in the operating piston
(3), preventing the exhaust valve from opening
any further.
Position A:
Operating piston inactive.
Position B:
Operating piston during regular operation.
Position C:
Operating piston hydraulically opened too far, oil
pressure is discharged via the operating piston.
©
200324
https://www.truck-manuals.net/
XE ENGINE, ENGINE BRAKE
A
B
C
General
10
3
10
3
10
10
3
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