Instructions 67-9319
Bacharach, Inc.
Page 1-11
INJECTOR CALIBRATOR CD3
INTRODUCTION
A temperature sensor, mounted in the reservoir, is
connected to a solid-state temperature controller,
which either switches on the heaters or energizes
the water solenoid valve (L1) to admit cold water to
the cooling coil. A safety switch (S2) protects the
system from overheating should the sensor fail.
The Hour Meter (HR1) is used to monitor the time
calibration fluid has been maintained at specified
temperatures by the Temperature Control System.
Light (DS2) is “ON” during the heaters on cycle and
“OFF” during the cooling cycle. Light (DS2) when
monitored in conjunction with the CALIBRATION
FLUID TEMPERATURE gauge is used to adjust
the desired temperature with setting control R1.
Fluid temperature is kept stable through circu-
lation provided by the continuously running gear
pump in the clamping circuit (Figure 1-11).
1.6 Pneumatic System (Figure 1-14B)
Pneumatic system operates on shop supplied com-
pressed air. Air pressure is needed for body to seat
clamping operation and to power the intensifier.
On entering the system, shop air pressure at 95-125
psi is reduced to 90 psi by the Primary Air Pressure
Regulator and 60 psi (4.1 bar) by the Secondary Air
Pressure Regulator, complete with water trap,
filter, and gauge. The correct air pressure settings
are made at the factory (and must be monitored by
the operator). The Primary Air Pressure Regulator
controls force exerted by the air cylinders for body
to seat clamping of Cummins injectors. The Second-
ary Air Pressure Regulator controls hydraulic pres-
sure of the intensifier assembly to unlock the hy-
draulic cylinder. Operation of the air clamping cyl-
inders is controlled by two solenoid valves (L4, L5).
1.7 Electrical System (See Chapter 5)
The electrical system shown in the schematics in
Chapter 5 includes the following safety interlocks:
• Motor will not start if pulley cover is not closed.
• If the operator accidently presses the “BODY
TO SEAT” (yellow) button or the “HOLD TO
OPERATE” (green) button while the calibrator
is running, no damage to the injector or the
calibrator will occur.
• If the air pressure to the calibrator is lost, the
main motor will stop.
• Body to seat clamping will occur only if the
camshaft is in top dead center position, that is,
when the white painted area of the flywheel is
showing through the cambox cover window.
Figure 1-13. Flowmeter Circuit
Содержание 67-7622
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