WATER PUMP, THERMOSTAT & IDLER PULLEYS
REASSEMBLY AND INSTALLATION
Reassemble and Install the Fan Idler Pulley (with
Front Ball Bearing and Rear Roller Bearing) as
IMPORTANT: When rebuilding the fan idler bracket,
it is necessary to use the Pilot Tool (PLT-561 or SE-
4038) on the end of the idler pulley shaft when
installing it in the idler bracket. Use of the tool will
ensure accurate entry of the inner race into the roller
bearing assembly, without damage on DT-466
Pilot tool is in effect starting on DT-466 with engine
Serial Number 98453 and up.
To facilitate removal of the tool, the pipe plug
hole (1, Fig. 36) in the idler bracket must be enlarged.
Drill and tap hole with 57/64 drill to 3/4 inch NPT.
Thoroughly clean reworked idler bracket to insure all
machining chips are removed.
Figure 36. - Rework of Idler Bracket
Idler Bracket Hole
Figure 37. - Installing Inner Race
Press inner race of roller bearing onto the shaft
until it is against the shoulder as shown in Figure
Pack roller bearing rollers with 251 H-EP grease.
Supporting the base of the idler bracket, press
roller bearing outer race and roller assembly into
idler bracket until it bottoms against bracket as
shown in Figure 38. APPLY FORCE TO
OUTER RACE ONLY.
PRINTED IN UNITED STATES OF AMERICA