SECTION 5 - BASIC HYDRAULIC INFOR
M
ATION AND SCHE
M
ATICS
5-16
3121160
8.
Using suitable protection, clamp the cylinder rod in a
vise or similar holding fixture as close to the piston as
possible.
9.
Remove capscrews from drilled holes.
10.
Insert the capscrews in the threaded holes in the outer
piece of the tapered bushing. Progressively tighten the
capscrews until the bushing is loosen on the piston.
11.
Remove the bushing from the piston.
12.
Screw the piston counterclockwise by hand and remove
the piston from cylinder rod.
13.
Remove and discard the piston o-ring, backup ring,
hydrolock seals, and guidelock rings.
NOTE:
Step 14 is applicable only for cylinders with SN 0300069000
through 0300079612.
14.
Remove setscrew and piston spacer from the rod.
NOTE:
Step 15 is applicable only for cylinders with SN 0300079613
through 0300185827.
15.
Remove piston spacer from the rod.
16.
Remove and discard o-ring from piston spacer inside
groove.
17.
Remove the rod from the holding fixture. Remove cap-
screws and washer ring. Remove the cylinder head
gland. Discard the o-rings, backup ring, rod seal, wiper
seal, and wear ring.
CLEANING AND INSPECTION
1.
Clean all parts thoroughly in an approved cleaning sol-
vent.
2.
Inspect the cylinder rod for scoring, tapering, ovality, or
other damage. If necessary, dress rod with Scotch Brite
or equivalent. Replace rod if necessary.
3.
Inspect threaded portion of rod for excessive damage.
Dress threads as necessary.
4.
Inspect inner surface of cylinder barrel tube for scoring
or other damage. Check inside diameter for tapering or
ovality. Replace if necessary.
5.
Inspect threaded portion of barrel for damage. Dress
threads as necessary.
6.
Inspect piston surface for damage and scoring and for
distortion. Dress piston surface or replace piston as nec-
essary.
7.
Inspect threaded portion of piston for damage. Dress
threads as necessary.
8.
Inspect seal and o-ring grooves in piston for burrs and
sharp edges. Dress applicable surfaces as necessary.
9.
Inspect cylinder head inside diameter for scoring or
other damage, and for ovality and tapering. Replace as
necessary.
10.
Inspect threaded portion of head for damage. Dress
threads as necessary.
11.
Inspect seal and o-ring grooves in head for burrs and
sharp edges. Dress applicable surfaces as necessary.
12.
Inspect cylinder head outside diameter for scoring or
other damage and ovality and tapering. Replace as nec-
essary.
13.
If applicable, inspect rod and barrel bearings for signs of
correct excessive wear or damage. Replace as necessary.
a.
Thoroughly clean hole, (steel bushing) of burrs, dirt
etc. to facilitate bearing installation.
b.
Inspect steel bushing for wear or other damage. If
steel bushing is worn or damaged, rod/barrel must
be replaced.
c.
Lubricate inside of steel bushing with prior to bear-
ing installation.
d.
Using an arbor of the correct size, carefully press the
bearing into steel bushing.
NOTE:
Install pin into the composite bearing dry. Lubrication is
not required with nickel plated pins and bearings.
TAPERED
BUSHING
ROD
CAPSCREW
PISTON
Figure 5-21. Tapered Bushing Removal
Summary of Contents for 740AJ
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Page 116: ...SECTION 3 CHASSIS TURNTABLE 3 64 3121160 Figure 3 44 Swing Hub Prior to SN 0300074383...
Page 203: ...SECTION 3 CHASSIS TURNTABLE 3121160 3 151 Figure 3 77 EFI Component Location...
Page 206: ...SECTION 3 CHASSIS TURNTABLE 3 154 3121160 Figure 3 78 ECM EPM Identification ECM EPM...
Page 224: ...SECTION 3 CHASSIS TURNTABLE 3 172 3121160 Figure 3 83 Deutz EMR 2 Troubleshooting Flow Chart...
Page 228: ...SECTION 3 CHASSIS TURNTABLE 3 176 3121160 Figure 3 87 EMR 2 Engine Plug Pin Identification...
Page 229: ...SECTION 3 CHASSIS TURNTABLE 3121160 3 177 Figure 3 88 EMR 2 Vehicle Plug Pin Identification...
Page 230: ...SECTION 3 CHASSIS TURNTABLE 3 178 3121160 Figure 3 89 EMR2 Fault Codes Sheet 1 of 5...
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Page 303: ...SECTION 4 BOOM PLATFORM 3121160 4 31 Figure 4 20 Rotator Assembly HELAC...
Page 460: ...SECTION 5 BASIC HYDRAULIC INFORMATION AND SCHEMATICS 5 116 3121160 NOTES...
Page 467: ...SECTION 6 JLG CONTROL SYSTEM 3121160 6 7 Figure 6 2 ADE Block Diagram...
Page 534: ...SECTION 6 JLG CONTROL SYSTEM 6 74 3121160 NOTES...
Page 580: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 46 3121160 NOTES...
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