JLG 600A Service And Maintenance Manual page 104

SERVO PISTON AND MINIMUM ANGLE STOP
Inspect the minimum angle stop, servo piston head, and servo
piston ball-socket for damage or excessive wear. Replace
swashplate if the difference in thickness from one side to the
other exceeds specification.
25.8 mm
LV
[1.015 in]
24.6 mm
KV
[0.969 in]
Thickness equality
side to side:
0.05 mm [0.002 in]
Inspect the journal bearings for damage or excessive wear.
Replace journal bearings if scratched, warped, or excessively
worn. The polymer wear layer must be smooth and intact.
SHAFT BEARINGS
Inspect bearings for excessive wear or contamination. Rotate
the bearings while feeling for uneven movement. Bearings
should spin smoothly and freely. Replace bearings that appear
worn or do not rotate smoothly.
SHAFT
Inspect the motor shaft. Look for damage or excessive wear on
the output and block splines. Inspect the bearing surfaces and
sealing surface. Replace shafts with damaged or excessively
worn splines, bearing surfaces, or sealing surfaces.
3121201
Replace if necessary.
0.0025 mm
[0.0001 in]
LOOP FLUSHING SPOOL
Inspect the loop flushing spool. Check for cracks or damage.
Replace if necessary.
SECTION 3 - CHASSIS & TURNTABLE
3-45