JLG 600A Service And Maintenance Manual page 103

SECTION 3 - CHASSIS & TURNTABLE
CYLINDER BLOCK
Measure the cylinder block height. Replace blocks worn
beyond the minimum height specification. Inspect the run-
ning surface of the cylinder block. Replace or resurface worn
or scratched blocks. Blocks may be resurfaced to the specifica-
Measurement
Minimum Cylinder Block
Height (A)
Cylinder Block Surface Flat-
ness
BALL GUIDE AND SLIPPER RETAINER
Inspect the ball guide and slipper retainer for damage, discol-
oration, or excessive wear. A discolored ball guide or slipper
retainer indicates excessive heat. Do not reuse.
3-44
Table 3-5. Cylinder Block Measurements
L25
50.8 (2.00) 50.8 (2.00)
0.002 0.002
(0.0000079) (0.0000079)
Slipper retainer
Ball guide
tions shown in the drawing, provided resurfacing will not
reduce the block height below the minimum specification.
Table 3-5, Cylinder Block Measurements.
L30 L35
50.8 (2.00) 54.4 (2.14)
0.002
(0.0000079) (0.0000079)
A
VALVE PLATE
The condition of the valve plate is critical to the efficiency of
the motor. Inspect the valve plate surfaces carefully for exces-
sive wear, grooves, or scratches. Replace or resurface grooved
or scratched valve plates. Measure the valve plate thickness
and replace if worn beyond the minimum specification. Valve
plates may be resurfaced to the specifications shown in the
drawing, provided resurfacing will not reduce the thickness
below the minimum specification.
SWASHPLATE AND JOURNAL BEARINGS
Inspect the running face, servo ball-joint, and swashplate jour-
nal surfaces for damage or excessive wear. Some material
transfer may appear on these surfaces and is acceptable pro-
viding the surface condition meets specifications shown. Mea-
sure the swashplate thickness from the journals to the running
face. Replace swashplate if damaged or worn beyond mini-
mum specification.mum specification.
K38 K45
54.4 (2.14)
0.002 0.002
(0.0000079)
3.83 mm [0.151 in] min.
0.025 mm
[0.001 in]
0.0076 mm
[0.00030 in]
convex max
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