TM 5-3805-280-24-2
Air Intake and Exhaust System
PERFORM RADIAL BEARING CLEARANCE
30
14
TEST
This test will give an indication of the condition of the
radial bearings within the center housing and rotating
assembly.
NOTE: Prelube center housing bearings prior to
performing radial clearance test. (See PRELUBE
TURBOCHARGER, later in this Group.)
1. Position dial indicator with extension adapter onto
center housing so that tip rests on shaft extending
through oil return cavity.
IMPORTANT: Use only moderate force (3--4 lbs.) on
each end of the shaft when checking
clearance.
2. Grasp rotating shaft at both ends and move the shaft
toward the indicator then away from the indicator
(arrows) by applying moderate force of 3--4 lbs.
3. Observe and record total indicator movement.
Turbocharger (AiResearch/Garret)--Specification
Radial Bearing Clearance ....................... 0.8--0.18 mm (0.003-0.007 in.)
maximum
Turbocharger (CZ)--Specification
Radial Bearing Clearance ...................... 0.37--0.46 mm (0.015-0.018 in.)
maximum
4. If total indicator reading is not within specification,
replace turbocharger.
RG,30,JW7573
1920NOV971/1
13-370