SECTION 5 - HYDRAULICS
3121259
– JLG Lift –
5-45
BALL GUIDE, SLIPPER RETAINER, AND HOLD-DOWN
PINS
Ensure ball guide is free of nicks and scratches, and not scored.
Examine for discoloration that may indicate excessive heat or
lack of lubrication.The slipper retainer should be flat, and slip-
pers should fit in the retainer with minimal side play. Place the
hold-down pins on a flat surface and roll them to make sure
they are straight. Discard and replace any damaged parts.
BLOCK SPRING, AND WASHERS
If cylinder kit was fully disassembled, visual inspection of the
cylinder block, spring, and washers should indicate minimal
wear. Replace if cracks or other damage are present.
CYLINDER BLOCK
Examine the running face of the cylinder block. The surface
should be smooth and free of nicks and burrs. Ensure that no
scratches or grooves exist; these may drastically reduce output
flow.
SHAFT
Check to see that the shaft and its splines are straight and free
of damage or heavy wear. Inspect the shaft surface where it
meets the shaft seal. Replace the shaft if a groove exists at the
sealing land surface where it meets the shaft seal. Clean the
sealing area with a nonabrasive material if necessary. Lubricate
the shaft with a light coat of hydraulic fluid before reassembly.
SHAFT BEARING
Clean bearing with a solvent and lubricate with hydraulic fluid.
Inspect for wear, or pitting. Rotate the bearing in your hand.
Replace if it does not rotate smoothly.
SWASHPLATE
Carefully inspect each machined surface of the swashplate for
wear. Ensure all swashplate surfaces are smooth. Inspect the
swashplate's slipper running surface for flatness and brass
transfer. Excessive brass transfer from slippers may indicate
you should replace the slippers. Check the journals for
scratches. Replace swashplate if necessary.
VALVE PLATE
Inspect the valve plate for scratches and grooves. Check the
plate for pitting along the running face. If pitting from cavita-
tion exists, replace the valve plate. Check for excess wear on
the brass running face. If you observe any discoloration or
burn marks, replace the valve plate.
Содержание 340AJ
Страница 1: ...Service and Maintenance Manual Model 340AJ P N 3121259 June 27 2017...
Страница 2: ......
Страница 10: ...vi JLG Lift 3121259 TABLE OF CONTENTS SECTION NO TITLE PAGE NO Thispageleftblankintentionally...
Страница 15: ...3121259 JLG Lift xi LIST OF FIGURES FIGURE NO TITLE PAGE NO Thispageleftblankintentionally...
Страница 18: ...xiv JLG Lift 3121259 LIST OF TABLES TABLE NO TITLE PAGE NO Thispageleftblankintentionally...
Страница 42: ...SECTION 2 GENERAL 2 12 JLG Lift 3121259 NOTES...
Страница 69: ...SECTION 3 CHASSIS TURNTABLE 3121259 JLG Lift 3 27 Figure 3 24 Bearing Pressing Tool...
Страница 71: ...SECTION 3 CHASSIS TURNTABLE 3121259 JLG Lift 3 29 Figure 3 27 Bearing Nut Wrench...
Страница 134: ...SECTION 3 CHASSIS TURNTABLE 3 92 JLG Lift 3121259 NOTES...
Страница 157: ...SECTION 4 BOOM PLATFORM 3121259 JLG Lift 4 23 Figure 4 8 Rotator Counterbalance Valve...
Страница 218: ...SECTION 5 HYDRAULICS 5 58 JLG Lift 3121259 Figure 5 32 Fasteners and Plugs Sheet 1 of 2...
Страница 219: ...SECTION 5 HYDRAULICS 3121259 JLG Lift 5 59 Figure 5 33 Fasteners and Plugs Sheet 2 of 2...
Страница 236: ...SECTION 5 HYDRAULICS 5 76 JLG Lift 3121259 Figure 5 39 Gear Pump Cutaway...
Страница 246: ...SECTION 5 HYDRAULICS 5 86 JLG Lift 3121259 Figure 5 40 Oil Sampling Port...
Страница 255: ...SECTION 6 JLG CONTROL SYSTEM 3121259 JLG Lift 6 9 PLATFORM MODULE GROUND MODULE Figure 6 2 Control Module Location...
Страница 256: ...SECTION 6 JLG CONTROL SYSTEM 6 10 JLG Lift 3121259 Figure 6 3 Ground Module Sheet 1 of 4...
Страница 267: ...SECTION 6 JLG CONTROL SYSTEM 3121259 JLG Lift 6 21 Figure 6 10 Analyzer Diagnostics Menu Sheet 1 of 4...
Страница 268: ...SECTION 6 JLG CONTROL SYSTEM 6 22 JLG Lift 3121259 Figure 6 11 Analyzer Diagnostics Menu Sheet 2 of 4...
Страница 269: ...SECTION 6 JLG CONTROL SYSTEM 3121259 JLG Lift 6 23 Figure 6 12 Analyzer Diagnostics Menu Sheet 3 of 4...
Страница 270: ...SECTION 6 JLG CONTROL SYSTEM 6 24 JLG Lift 3121259 Figure 6 13 Analyzer Diagnostics Menu Sheet 4 of 4...
Страница 271: ...SECTION 6 JLG CONTROL SYSTEM 3121259 JLG Lift 6 25 Figure 6 14 Analyzer Personalities Menu Sheet 1 of 2...
Страница 272: ...SECTION 6 JLG CONTROL SYSTEM 6 26 JLG Lift 3121259 Figure 6 15 Analyzer Personalities Menu Sheet 2 of 2...
Страница 273: ...SECTION 6 JLG CONTROL SYSTEM 3121259 JLG Lift 6 27 Figure 6 16 Analyzer Machine Setup Menu...
Страница 274: ...SECTION 6 JLG CONTROL SYSTEM 6 28 JLG Lift 3121259 Figure 6 17 Analyzer Calibrations Menu...
Страница 289: ...SECTION 6 JLG CONTROL SYSTEM 3121259 JLG Lift 6 43 14 Press ENTER If calibration is successful the screen will read...
Страница 336: ...SECTION 6 JLG CONTROL SYSTEM 6 90 JLG Lift 3121259 NOTES...
Страница 346: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 10 JLG Lift 3121259 Figure 7 13 Connector Installation...
Страница 365: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 3121259 JLG Lift 7 29 This page left blank intentionally...
Страница 368: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 32 JLG Lift 3121259 NOTES...
Страница 369: ......