Inspection
INSPECTION OF INDIVIDUAL PARTS AND COMPONENTS
(See figure 12 for reference numbers)
Nomenclature
Ref. No.
2
3
4
7
8
10
11
12
13
14
15
18
19
20
23,39
and 43
24
26
28
31
32
Bend indicating plate cap
Sleeve bearing
Bend indicating plate (dial)
Form block assemblies
Clamp block
Clamp block pressure pad
Clamp yoke screw
Clamp yoke
Form shoe
Rack
Pressure plate
Feed screw
Form shoe slide block
Screw post
Ball bearings
Slide block support
Name plate
Upper half housing
Drive shaft
Drive gear
Replace if broken or if slotted hole at center is badly worn.
This would cause incorrect readings.
Check for fit on upper end of drive shaft (31). Replace bearing
if excessively loose, as this would cause undue strain on
certain parts.
Replace if bent or cracked.
Check for damage to form grooves, damaged or worn splines
at center and loose sector gear. Loose sector gears can be
tightened by installing new pins, but the blocks should be re-
placed for other conditions. Sector gears having worn or
damaged teeth should be replaced.
Replace if chipped or distorted.
Replace if bent.
Replace if threads are worn or damaged.
Replace if cracked or distorted. Also check for damaged
threads, and if retapping fails to restore threads, replace the
yoke.
Check for bends, twists and damaged forming channels. Re-
place for any of these conditions.
Check for bends, worn or damaged gear teeth and damaged
dowels. Replace for any of these conditions.
Replace if worn or cracked.
Replace if bent, or if threads are damaged.
Check for distortion and wear in track on underside of block.
Replace for either condition.
Check for bends and damaged or worn feed screw threads.
Replace for either condition.
Hold the outer race and rotate the inner race to determine if
bearings are rough or worn. Rotation should be smooth and
free of resistance except for slight pressure produced by the
bearing seals. If bearings are loose, rough, or if seals are
damaged the bearings should be replaced.
Replace if worn, cracked or bent.
Replace only if damaged, or if data on plate is not clearly
visible.
Check for cracks, stripped threads and distortion. Distortion
can be detected by placing the parting surface of the housing
against a surface plate. Contact should be made throughout
the entire parting surface.
Check for excessive wear on splines at both ends, and wear on
milled key at the top end. Replace for either condition.
Check for damaged or worn splines and rough or worn teeth.
Replace for either condition.
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