TM 5-3810-294-34
Table 1-4. Repair and Replacement Standards (Continued)
Manufacturing Dimensions
Maximum allowable
and tolerances inches
wear or clearance
Component
From
To
maximum
PISTONS (Continued):
Connecting rod bearing clearance
with crankshaft journal .................................. 0.001
0.002
Crankshaft journal out of round ............................. 0.001
0.001
Crankshaft clearance with oil seal ......................... 0.0015
0.0025
BOOM HOIST SHAFT
Worm sheel shaft bearing end play........................ 0.003
0.005
0.005
Worm to worm wheel contact
.......................................................
Must be all to the left of
.......................................................
centerline (para 2-19)
Planetary boom hoist drum
a. Rope spooling surface in relation to
bearing bores (total runout) ...................
1/8 inch
b. Drum surfaces and gear pitch diameter
in relation to,bearing bores (total runout)
0.003 T.I.R.
Sprockets
a. Pitch line concentric with spline within...
0.006 T.I.R.
b. Hub faces perpendicular within .............
0.002 T.I.R.
Planetary pinion backlash ..................................... 0.004
0.006
0.008
Hub and gear backlash ......................................... 0.004
0.006
0.008
Spacer face parallelism 00005 ...............................
0.002
WORM SHAFT:
Bearing end play..................................................... 0.003
0.005
0.005
Large bearing journal ............................................. 2.1663
2.1665
Small bearing journal.............................................. 1.9686
1.9693
SWING BRAKE MASTER CYLINDER:
Piston to housing bore ...........................................
0.007
BOOM SHEAVES AND ROLLERS:
Sheave bushings (ID)............................................. 3.011
3.013
Sheave bushing (OD)............................................. 3.504
3.506
Sheave bore ....................................................... 3.500
3.502
Roller bore
....................................................... 2.375
2.377
CONTROL STAND MASTER
CYLINDERS:
Piston to housing bore............................................
0.007
GANTRY:
Peak sheave bore .................................................. 2.4995
2.5015
Peak sheave bushing bore..................................... 2.2555
2.2575
Peak pin (small diameter) ...................................... 2.2470
2.2485
Spreader sheave bore............................................ 2.4995
2.5015
Spreader bushing bore .......................................... 2.2555
2.2575
Spreader pin diameter............................................ 2.2470
2.2485
DRUM PAWL AND SWING
LOCK CONTROL:
Boom hoist drum pawl bore ................................... 1.002
1.012
Front and rear drum pawl bores ............................. 0.995
1.000
Front and rear drum pawl keyway (width) ............. 0.1885
0.1905
Front and rear drum pawl keyway (depth).............. 0.0997
0.1047
Swing lock lever bore ............................................. 1.002
1.012
Compression springs (free length) .........................
4-3/4"
Front and rear drum levers (bore) .......................... 0.995
1.000
Front and rear drum lever keyway (width).............. 0.1885
0.1905
Front and rear drum lever keyway (depth) ............. 0.0997
0.1047
SWING BRAKE ASSEMBLY:
Swing brake shoes pivot bore ................................ 1.52
1.255
Swing brake pinion shaft (top bearing journal) ....... 2.5580
2.5591
Swing brake pinion shaft (lower bearing journal) ... 2.6592
2.5599
HOOK BLOCK:
15 increase
Hook throat diameter..............................................
10
Hook twist
.......................................................
1-11
