Page 460
REPAIR INSTRUCTIONS, PART 3
2. Adjust the final intake valve lash, engine
brake piston lash, and exhaust valve lash for
cylinder No. 5 as described for cylinder
No. 1. Continue this procedure for each of
the remaining cylinders, following the engine
firing order sequence, 1-5-3-6-2-4.
Electronic Unit Pump (EUP)
Calibration
[221 GP]
Whenever an electronic unit pump(s) is replaced
in an engine, it is necessary to recalibrate the
pump(s) by entering the calibration code into the
engine electronic control unit (EECU). The
calibration code is a four-digit number that can be
found on the data plate of each individual unit
pump. This calibration code is then entered by
using a personal computer that is running the
V-MAC
®
Service Support Software.
The four-digit calibration code can be found on
the EUP data plate, shown after the letters “CAL”
for early production EUPs. For later-production
EUPs, the calibration code is still found in the
same location on the data plate (next to the word
MACK), only the identification letters “CAL” have
been eliminated to provide room for larger bar
codes.
ENGINE SPEED AND POSITION
SENSORS INSTALLATION AND
ADJUSTMENT
Engine Speed Sensor
Because the engine speed sensor (Figure 576) is
controlled by the measurement and selection of
proper mounting shims, the installation procedure
is as follows:
1. Using a depth micrometer or vernier caliper,
measure from the sensor mounting surface
on the flywheel housing to the outside
diameter (OD) of a flywheel ring tooth.
Measurement must be made to the tooth OD or
an inaccurate measurement will result.
2. Select and install a shim on the sensor
mounting flange. Refer to following chart for
shim selection.
SHIM SELECTION CHART FOR ENGINE SPEED AND
ENGINE POSITION SENSORS
3. Install the sensor with the appropriate shim.
Tighten the sensor retaining capscrew to the
proper specification.
Depth as Measured
Use the Following
P/N 505GC28 Shims
Less than/equal to 1.328 (2) P30
1.329 through 1.343 (1) P45
1.344 through 1.358 (1) P30
1.359 through 1.373 (1) P15
Equal to/greater than 1.374 None
5-111.bk Page 460 Monday, July 10, 2006 2:26 PM
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