Camshaft and Timing Gear Train
02
050
13
RG,RG34710,191 –19–25OCT00–8/14
RG10245 –UN–30JUL99
Camshaft with Pilot and Holder
A—JDG969A Camshaft Holder
B—Camshaft
C—JDG972 Camshaft Pilot
Install Engine Camshaft
IMPORTANT: Later 12.5 L engines (30000— ) have a
redesigned camshaft. This camshaft
must NOT be installed in earlier engines
( —29999) or the ECU’s will be
overstroked, resulting in severe engine
damage. Additionally, DO NOT install
early model camshafts in 12.5 L engines
(30000— ). Consult parts catalog for
correct camshaft part numbers.
1. If removed, install fuel supply pump drive pin in end of
camshaft. (See REPLACE FUEL SUPPLY PUMP
DRIVE PIN later in this group.)
NOTE: Engine repair stand must be level during camshaft
installation. Traverse hoist during installation so
that camshaft bearings do not bind in bushing.
2. Attach JDG969A Camshaft Holder (A) to front face of
camshaft (B). Attach JDG972 Camshaft Pilot (C) to
rear face of camshaft. Securely tighten all mounting
hardware.
3. Coat camshaft lobes and bearings with TY6333 or
TY6347 High Temperature Grease.
4. Generously lubricate camshaft bushings with clean
engine oil.
5. Support camshaft with overhead hoist and carefully
guide camshaft into bushing bores. Traverse hoist (if
possible) as camshaft is installed and keep engine
repair stand level to ease installation.
Continued on next page
CTM100 (06APR04)
02-050-13
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=253
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