TM 5-3805-280-24-2
Crankshaft, Main Bearings and Flywheel
CHECK FLYWHEEL FACE FLATNESS
15
22
1. Mount dial indicator base on flywheel housing. Position
pointer to contact driving ring mounting surface. Do not
allow pointer to contact driving ring mounting holes.
IMPORTANT: Maintain constant end pressure on
crankshaft to hold shaft against thrust
bearing when measuring flywheel face
runout.
2. Rotate flywheel by turning crankshaft. Read total
indicator movement. Resurface flywheel face or
replace as required.
Flywheel Face Flatness--Specification
Maximum Variation..................................................... 0.23 mm (0.009 in.)
Maximum Variation per 25 mm .............................. 0.013 mm (0.0005 in.)
(1.0 in.) of Travel
RG,15,DT7453 1914NOV971/1
CHECK PILOT BEARING BORE
CONCENTRICITY
1. Mount dial indicator on flywheel housing face and
position pointer to contact I.D. of pilot bearing bore in
flywheel.
2. Rotate flywheel by turning crankshaft. Read total dial
indicator movement.
Flywheel Bearing Bore Concentricity--Specification
Maximum Variation................................................... 0.127 mm (0.005 in.)
DPSG,OUO1004,69 1921APR981/1
13-200
