PowerTech 6105HF - Perform Radial Bearing Clearance Test

Air Intake and Exhaust System
02
080
13
DPSG,OUO1004,946 –19–03NOV00–1/1
Perform Radial Bearing Clearance Test
RG10284 –UN–20AUG99
Checking Radial Bearing Clearance
This test will give an indication of the condition of the
radial bearings within the center housing and rotating
assembly.
1. Fasten a magnetic base (plunger-type) dial indicator to
the turbocharger mounting base. Assemble an
extension adapter and indicator extension rod onto dial
indicator.
2. Position indicator tip (through center housing oil return)
on center of shaft. Preload indicator tip and zero dial
on indicator.
IMPORTANT: Use only moderate hand force (3—4
pounds) on each end of shaft when
checking clearance.
3. Grasp rotating shaft at both ends and move the shaft
toward the indicator, then away from the indicator
(arrows). Use care to move the shaft in the same
direction as the dial indicator tip travels and apply
equal pressure at both ends of the shaft.
4. Observe and record total indicator movement.
Specification
Garrett Turbocharger Shaft—
Radial Bearing Clearance
(Allowable Movement) 0.076—0.165 mm (0.003—0.0065
in.) (measured on center of shaft)
..........................
Borg Warner Turbocharger
Shaft—Radial Bearing Clearance
(Allowable Movement) 0.56—0.81 mm (0.022—0.0.032
in.) (measured on end of shaft)
............................
If total indicator reading is not within specification, install a
replacement turbocharger.
CTM100 (06APR04) 02-080-13 P OWER T ECH 10.5 L & 12.5 L Diesel Engines
040604
PN=313