9
FIG. 14
The CBrake by Jacobs is a relatively trouble-free
device. However, inspections and routine mainte-
nance will need to be made from time to time. Use
the following procedures to keep the engine brake
in top condition.
This section will cover how to properly remove,
clean and reinstall engine brake components. Use
an OSHA-approved cleaning solvent when wash-
ing parts. Be sure to coat parts with clean engine
oil when reinstalling them.
NEVER REMOVE ANY ENGINE BRAKE
COMPONENT WITH ENGINE RUNNING.
PERSONAL INJURY MAY RESULT.
NOTE: FIG. 12 IS ACTUAL ISL03 BRAKE. FIG. 13-26
ARE TYPICAL BRAKE COMPONENTS AND NOT
SPECIFIC TO 490A.
Control Valve
REMOVE CONTROL VALVE COVERS
CAREFULLY. CONTROL VALVE COVERS ARE
UNDER LOAD FROM THE CONTROL VALVE
SPRINGS. REMOVE WITH CARE TO AVOID
PERSONAL INJURY.
1. Apply pressure on the control valve cover and
remove retaining ring using retaining ring pliers
(see Fig. 13).
2. Slowly remove cover until spring pressure
ceases, then remove the control valve springs
and collar (see Fig. 14).
FIG. 13
FIG. 12
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