Bacharach 67-7622, Installation & Operation Instruction

Page: 27 / 96

Instructions 67-9319
Bacharach, Inc.
Page 3-1
INJECTOR CALIBRATOR CD3 OPERATION
Figure 3-1. Cummins Injector Accessories
3.0 OPERATION
3.1 Cummins Injectors
Cummins 189 cam (67-6370) is installed in the
cambox at the factory. Other cams are packed with
the Cummins accessories.
A complete set of Cummins Accessories is supplied
under part number 67-7633 (Figure 5-14). The
inside right front door of the calibrator has spaces
designated for hanging Cummins accessories.
Hooks are provided with the accessories.
NOTE: All parts are not shown in the
photograph, check Chapter 5 (or the
packing list) for a complete list of parts
for the Cummins Accessories set.
All Cummins injectors require the same discharge
head. This is a critical component in the measure-
ment of injector fuel delivery. One of the main re-
quirements of this component is that it incorporate
a reliable check valve with good sealing character-
istics and the correct pressure-flow rating.
NOTE: Do not change the setting of the
adjusting screw on the discharge head.
The discharge head was adjusted at the
factory for proper flow characteristics and
leakage, and can be adjusted only by using
the Audit Kit (See Appendix A).
A push rod extension is used for all Cummins in-
jectors. This extension fits between the end of the
push rod and the injector link. It incorporates a
plug and a shear pin for safety in case the link
forces are excessive for any reason. Because the
clamping cylinder rod can be locked at any position
within its stroke, it is not necessary to have a
different link for each PTD injector type.
3.1.1 Quick Reference Chart
This chart is for reference only. Use the procedures
on the following pages for preparing the calibrator,
accessories, and injectors for testing. For testing all
Cummins injectors the camshaft speed must be
1050 RPM.
To change speed refer to Section 3.1.2. All
Cummins injectors require accessories listed in the
chart, plus 67-7642 Discharge Head, and 67-5706
Push Rod Extension. For all Cummins injectors the
rail pressure must be exactly 100 psi.
Push Rod Lock Adapters Drain Hose
Push Rods
and Links Cams Locating
Pin Push Rod
Extension Discharge
Head