CRANKCASE, CRANKSHAFT, AND CAMSHAFT 267
Cam Gear on Camshaft
WARNING: To prevent serious personal
injury or possible death, wear heat resistant
gloves when handling heated components.
Figure 384 Heating the camshaft gear
CAUTION: To prevent engine damage, do not heat
the cam gear above 177 °C (350 °F). This will turn the
gear blue and reduce wear resistance. Do not use any
gear turned blue.
1. If the camshaft gear was removed from the
camshaft, heat the cam gear on a hot plate (Table
40) or other controlled heat source to 149-177 °C
(300-350 °F).
2. Pull camshaft assembly forward prior to sliding
heated gear onto camshaft.
Figure 385 Installing cam gear on camshaft
3. Use heat resistant gloves to install the heated
cam gear onto the camshaft. The cam gear
should slide onto the camshaft with only slight
hand pressure. Hold the cam gear (while
thoroughly seated) until it cools onto the camshaft
(approximately 30 seconds).
NOTE: Heated gear should easily slide onto camshaft.
Do not tap into place to avoid camshaft end play
issues. If gear does not slide easily, reheat gear and
try again.
Checking Camshaft End Play
Figure 386 Checking camshaft end play
1. Dial indicator set
2. Camshaft
1. Mount magnetic base of a dial indicator set (Table
40) on a flat engine surface.
2. Place the tip of the dial indicator on the end of the
camshaft and zero the dial indicator.
3. Use a screwdriver to pry the camshaft gear back
and forth. Record the reading on the dial indicator.
If the end play exceeds the specification, remove
the cam gear and pull the camshaft forward.
Repeat the procedure.
EGES-265-2
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
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