Bacharach 67-7622, Installation & Operation Instruction

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Instructions 67-9319
Bacharach, Inc.
Page 1-7
INJECTOR CALIBRATOR CD3 INTRODUCTION
Flywheel: A flywheel is mounted on the driven
end of the camshaft for uniform rotation. An
encoder wheel, also mounted on the camshaft in
conjunction with an optical pickup, counts strokes.
Cambox: The cambox is constructed of cast iron
and contains a 1-1/2 inch diameter camshaft
supported by heavy duty tapered roller bearings.
The cam is mounted to one end of the shaft on a
non-locking taper, secured by a nut and washer.
The driving torque is transmitted by a key and
keyway which allows quick and easy cam changes.
The rotating cam dips and splashes to lubricate the
cam, bearings, tappet, roller, and pusher rod.
Flowmeter transducer: For measuring fuel
output of the injector, the calibrator uses a positive
displacement flow measuring device with a digital
readout.
1.4 Calibration Fluid System (Figure 1-10)
The calibration fluid system consists of three
separate circuits:
a. The clamp and unclamp circuit, which also
provides continuous circulation of calibration
fluid for close temperature control.
b. The injector supply circuit (rail pressure).
c. The flowmeter circuit (injector output).
(a) Clamping Circuit (Plunger to Body)
(Figure 1-11)
For plunger-to-body clamping of Cummins and
clamping of DD injectors, a double-acting hydraulic
cylinder (8) is used.
The hydraulic cylinder is mechanically locked
under normal operating conditions by an interfer-
ence fit between the sleeve and the piston. To allow
the cylinder to move for clamping or unclamping an
injector, an intensifier assembly applies high
hydraulic pressure to the sleeve.
The intensifier assembly (Fig. 1-14A) consists of an
air driven hydraulic pump, reservoir, 3-way air
solenoid valve, and a 2-way hydraulic air release
valve. With power on, under normal operating
conditions, the 2-way hydraulic air release valve is
open so that pump output is vented back to the
reservoir.
Figure 1-8. Cambox Parts
Figure 1-9. Flowmeter Transducer
F l o w m e t e r T r a n s d u c e r
C a m s h a f t N u t a n d W a s h e r L u b r i c a t i n g O i l