
SECTION 5 - HYDRAULICS
5-4
– JLG Lift –
3120895
8.
Inspect seal and o-ring grooves in piston for burrs
and sharp edges. Dress applicable surfaces as nec-
essary.
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 nec-
essary.
12.
Inspect cylinder head outside diameter for scoring
or other damage and ovality and tapering. Replace
as necessary.
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 the steel bushing with WD 40
prior to bearing 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.
14.
Inspect travel limiting collar or spacer for burrs and
sharp edges. If necessary, dress inside diameter
surface with Scotch Brite or equivalent.
15.
If applicable, inspect port block fittings and holding
valve. Replace as necessary.
16.
Inspect the oil ports for blockage or the presence of
dirt or other foreign material. Repair as necessary.
17.
If applicable, inspect piston rings for cracks or other
damage. Replace as necessary.
Assembly
NOTE:
Prior to cylinder assembly, ensure that the proper
cylinder seal kit is used. See your JLG Parts Manual.
Apply a light film of hydraulic oil to all components
prior to assembly.
1.
A special tool is used to install a new rod seal into
the applicable cylinder head gland groove.
WHEN INSTALLING “POLY-PAK” PISTON SEALS, ENSURE SEALS
ARE INSTALLED PROPERLY. REFER TO WIPER SEAL INSTALLA-
TION FOR CORRECT SEAL ORIENTATION. IMPROPER SEAL
INSTALLATION COULD RESULT IN CYLINDER LEAKAGE AND
IMPROPER CYLINDER OPERATION.
2.
Use a soft mallet to tap a new wiper seal into the
applicable cylinder head gland groove. Install a new
wear ring into the applicable cylinder head gland
groove.
Figure 5-6. Composite Bearing Installation
Figure 5-7. Rod Seal Installation
Содержание JLG 400S
Страница 1: ...Service and Maintenance Manual Models 400S 460SJ P N 3120895 December 6 2012...
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Страница 47: ...SECTION 2 GENERAL 3120895 JLG Lift 2 9 Figure 2 1 Engine Operating Temperature Specifications Deutz 4150548 D...
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Страница 100: ...SECTION 3 CHASSIS TURNTABLE 3 48 JLG Lift 3120895 Figure 3 35 Swing Drive Installation...
Страница 101: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 49 Figure 3 36 Swing Motor...
Страница 105: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 53 Figure 3 38 Swing Brake S N 64802 to Present...
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Страница 137: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 85 Figure 3 50 Hyd Tank Installation...
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Страница 151: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 99 Figure 3 56 Deutz EMR 2 Engine Side Connection Diagram Sheet 1 of 2...
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Страница 288: ...SECTION 4 BOOM PLATFORM 4 24 JLG Lift 3120895 Figure 4 12 Rotator Counterbalance Valve...
Страница 303: ...SECTION 5 HYDRAULICS 3120895 JLG Lift 5 15 Figure 5 22 Main Valve...
Страница 313: ...SECTION 5 HYDRAULICS 3120895 JLG Lift 5 25 Figure 5 25 Variable Displacement Hydraulic Pump...
Страница 318: ...SECTION 6 JLG CONTROL SYSTEM S N 61718 TO PRESENT 6 2 JLG Lift 3120895 Figure 6 2 ADE Block Diagram...
Страница 322: ...SECTION 6 JLG CONTROL SYSTEM S N 61718 TO PRESENT 6 6 JLG Lift 3120895 Figure 6 4 Control Module Location...
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Страница 413: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 3120895 JLG Lift 7 11 Figure 7 13 Connector Installation...
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