![background image](http://html1.mh-extra.com/html/mack/e-tech-sb-210-034/e-tech-sb-210-034_service-manual_3224387304.webp)
Page 288
REPAIR INSTRUCTIONS
UNIT PUMP INSTALLATION
1. Install two new O-rings on the replacement
EUP in the upper and lower O-ring grooves.
2. Generously lubricate EUP O-rings with clean
engine oil and install the EUP into the
cylinder block (Figure 314).
Minimize oil above top O-ring to avoid weepage
of excess oil (trapped above the top O-ring) onto
the cylinder block.
To avoid O-ring damage, the cam lobe must be
positioned with the base circle up prior to
installation of each EUP. Do not use the starter to
rotate the engine; instead, use the flywheel
barring tool.
314
Figure 314 — Unit Pump Installation
3. Reinstall the EUP screws and tighten evenly
to draw the EUP into the cylinder block.
Tighten screws to 42 lb-ft (57 N•m).
4. Reinstall the injection line and torque to
specification as follows:
r
Line clamp screw at cylinder head:
35 lb-ft (47 N•m)
r
Line nut at cylinder head clamp screw:
25 lb-ft (34 N•m)
r
Line nut at EUP: 25 lb-ft (34 N•m)
5. Reinstall the wire terminals and tighten to
specification, 9 lb-in (1 N•m). Do not bend
wire terminals down after installation.
If an EUP has been replaced with a new or
remanufactured unit, the replacement unit must
be calibrated as described under Electronic
Pump Calibration in the Engine Setup and
Adjustments section. This will ensure optimum
engine performance.
6. Reinstall the heat shields.
Camshaft Replacement (Engine in
Chassis)
[213 CH]
The preliminary steps for replacing the camshaft
will vary depending on the chassis configuration
and engine model. As such, these steps are
general in nature. Begin the operation by
disconnecting the battery and draining all fluids
from the engine. Then, remove the hood and
fender assembly, radiator, engine accessories/
drives, ducts, valve covers, engine brake
assemblies (if equipped), rocker shaft
assemblies, push rods, oil pan and front cover,
etc. The cylinder heads will remain installed.
CAMSHAFT REMOVAL
When removing or installing the camshaft, first
remove the idler gear and hub. It is easier to
remove the camshaft guide from the camshaft
(after installation) when the idler gear has been
removed and alignment of the timing marks is not
being attempted at the same time. The final step
in the process is to reinstall the idler gear.
With the engine in the chassis, the valve lifters
must be held in the UP position, using tappet
holders J 37720-C in combination with J 42425.
5_106_00.bk Page 288 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs