Page 80
TROUBLESHOOTING
SOLENOID SPECIFICATIONS
INTERMITTENT BRAKING
Inspect all wiring for loose connections and all
switches for proper adjustment.
POOR PERFORMANCE
Connect a volt/ohmmeter (multimeter) to the
electrical connector on the spacer. Verify that a
steady voltage signal is present when the engine
brake is active. If not, check for loose connections
or faulty switches. Repeat for all spacer
terminals.
Hydraulic/Mechanical
Troubleshooting
SPECIAL TOOL REQUIRED
r
Jacobs Oil Pressure Test Kit 4559-18280
Remove the covers to begin inspecting the brake
housings and attendant hardware.
GENERAL INSPECTION AND ADJUSTMENT
VERIFICATION
1. Visually inspect the brake units for obvious
damage or missing parts. Replace as
necessary.
2. Check the slave piston-to-actuator pin for
proper clearance as shown in the Table on
page 80. Also check the intake and exhaust
valve clearance. Readjust if necessary.
Valve clearance must be checked with the timing
pointer hole on the flywheel housing aligned with
the proper valve setting mark on the flywheel for
the cylinder being checked. This ensures that the
valve lifter is on the camshaft base circle and not
on the brake ramp portion of the lobe.
Wear eye protection and do not expose your
face over the engine area. Keep hands away
from moving parts. Take precautions to
prevent oil leakage down onto the engine.
Whenever engine is running and the cylinder
head covers are removed, oil splashing in the
engine brake area could cause personal
injury.
Never remove any engine brake component
with the engine running. Personal injury may
result.
Slave piston clearance settings must be made
with the engine stopped and cold and with the
exhaust valves closed.
SLAVE PISTON CLEARANCE SETTINGS
DETERMINING ENGINE OIL PRESSURE AND
OIL PRESSURE AT THE ENGINE BRAKE
UNITS
The engine brake requires a minimum oil
pressure to operate. To determine the oil
pressure at the engine brake housing solenoid
valves, use the Jacobs oil pressure test kit (part
No. 4559-18280) and follow the instructions
included in the kit. See the Table on page 81 for
oil pressure requirements.
12-Volt Solenoid:
Resistance — 8.7 to 10.0 ohms
Current Draw — 0.9 to 1.6 amps
Pull In Voltage — 9 volts DC minimum
24-Volt Solenoid:
Resistance — 32.6 to 39.8 ohms
Current Draw — 0.46 to 0.75 amps
Pull In Voltage — 18 volts DC minimum
E-Tech™ Engine with J-Tech™ Engine Brake
Adjustment — 0.015 inches (0.381 mm)
Slave piston adjusting tool — standard feeler gauge
Adjust following the firing order — 1, 5, 3, 6, 2, 4
5_106_00.bk Page 80 Friday, August 4, 2000 11:17 AM
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