C4, SB 740-97-38
Classification
Item
Defect
Major
Minor
A
B
CLUTCH ASSEMBLY:
Bearings, shafts, linkage,
and springs.
Stage III corrosion; frozen...................................................................................x
Stage II corrosion................................................................................................
x
Metal disks and plates
Stage III corrosion...............................................................................................x
Stage II corrosion................................................................................................
x
Fiber disks and bands
Deteriorated; punctured or torn ...........................................................................x
Lubricant
Contaminated ...............................................................................................
x
BRAKE ASSEMBLY:
Drum and/or shoes
Stage IV corrosion ..............................................................................................x
Stage III corrosion...............................................................................................
x
Stage II corrosion................................................................................................
x
Springs, anchors, cable,
yokes, and/or linkage.
Stage IV corrosion; distorted or broken...............................................................x
Stage III corrosion; frozen...................................................................................
x
Stage II corrosion................................................................................................
x
Air reservoir
Stage III corrosion on internal surfaces; stage IV
corrosion on external surfaces......................................................................x
Stage II corrosion on internal surfaces; stage III
corrosion on external surfaces......................................................................
x
Cylinder actuating rods
Stage IV corrosion ..............................................................................................x
Stage III corrosion...............................................................................................
x
Stage II corrosion................................................................................................
x
Lines, hoses, and fittings
Checked; cracked, kinked; splt or cut; leaks; loss
of flexibility ....................................................................................................x
DRIVE BELTS:
Checking, cracking; broken reinforcing; frayed;
cut; loss of flexibility and resiliency; fungus
growth...........................................................................................................
x
DRIVE PULLEYS,
SPROCKEST, AND IDLERS:
Distorted, cracked or broken; takeup adjustment
frozen; stage IV corrosion.............................................................................x
Stage III corrosion...............................................................................................
x
Stage II corrosion................................................................................................
x
DRIVE SHAFTS, BUSHINGS,
UNIVERSAL JOINTS, BEARINGS,
AND BEARING HOUSINGS:
Stage IV corrosion on critical surfaces of drive
shafts, bushings, universal joints, bearings,
and/or bearing housings ...............................................................................x
Stage III corrosion on critical surfaces of drive
shafts, bushings, universal joints, bearings,
and/or bearing housings ...............................................................................
x
Stage II corrosion on critical surfaces of drive
shafts, bushings, universal joints, bearings,
and/or bearing housings ...............................................................................
x
CYCLONE INLET DUCT:
Ducts transition and elbows
Stage IV corrosion on interior surfaces...............................................................x
Stage III corrosion on interior surfaces ...............................................................
x
Assembly hardware
Stage IV corrosion on drawbands, bolts, nuts, or
washers ........................................................................................................x
Stage III corrosion on drawbands, bolts, nuts, or
washers ........................................................................................................
x
DUST CYCLONES:
Inlet and discharge housing
Stage IV corrosion on interior surfaces...............................................................x
Stage III corrosion on interior surfaces ...............................................................
x
Stage IV corrosion on interior surfaces...............................................................x
Stage III corrosion on interior surfaces ...............................................................
x
Gravity gate valves
Stage IV corrosion on interior surfaces; gates
frozen............................................................................................................x
Stage III corrosion on interior surfaces
CYCLONE DISCHARGE DUCT
TRANSITION, DAMPER, AND
ELBOW:
Stage IV corrosion on interior surfaces; damper
frozen............................................................................................................x
Stage III corrosion on interior surfaces ...............................................................
x
SCREW CONVEYOR ASSEMBLY:
Stage III corrosion on internal surfaces;
deteriorated seals; leaks; chipped, cracked, or
broken gears.................................................................................................x
III-CC-2
