SECTION 5 - BASIC HYDRAULICS INFORMATION & SCHEMATICS
3121234
5-39
5.3
PRESSURE SETTING PROCEDURE
Cold temperatures have a significant impact on pressure read-
ings. JLG Industries Inc. recommends operating the machine
until the hydraulic system has warmed to normal operating
temperatures prior to checking pressures. JLG Industries Inc.
also recommends the use of a calibrated gauge. Pressure read-
ings are acceptable if they are within ± 5% of specified pres-
sures.
To ensure all pressures are set correctly, the following proce-
dures must be followed in order.
1.
All applicable steps in Section 5.4, Start Up Procedures
must be followed.
2.
Set up of the function pump.
3.
Adjustments made at the main valve block.
4.
Adjustments made at the platform valve.
Set Up of the Function Pump
STAND BY PRESSURE OR LOAD SENSE PRESSURE
1.
Install a low pressure gauge at port “M1” of the main
valve block. A low pressure gauge capable of reading
500 psi (34.5 bar).
2.
Start the engine from the ground control. The gauge
should read between 400-440 psi (27.5 to 30 Bar). To
make an adjustment to this pressure, go to the engine
compartment and locate the function pump.
3.
There are (2) adjustments at the top of the pump. They
are located on the pump compensator which has (4)
bolts mounting it to the pump. The stand by adjustment
is at the top. To adjust this, a 4 mm and 6 mm allen
wrench will be needed. The adjustment screw is facing
the front of the pump, or toward the engine.
a.
First, using the 4 mm wrench, loosen the setscrew
on the side of the compensator (facing you) which is
in line with the adjustment screw. This is a jam nut
screw which holds the main adjustment from turn-
ing. Loosen it 1 turn.
b.
Next, using the 6 mm wrench adjust the main
adjustment clockwise to increase or counterclock-
wise to decrease. The pressure should read between
400-440 psi (27.5 to 30 Bar).
Содержание 680S
Страница 1: ...Service and Maintenance Manual Model 680S Prior to SN 0300189341 P N 3121234 December 05 2017 AS NZS...
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Страница 48: ...SECTION 2 GENERAL 2 10 3121234 Figure 2 1 Engine Operating Temperature Specifications Deutz 4150548 E...
Страница 49: ...SECTION 2 GENERAL 3121234 2 11 Figure 2 2 Engine Operating Temperature Specifications Ford 4150548 E...
Страница 50: ...SECTION 2 GENERAL 2 12 3121234 Figure 2 3 Engine Operating Temperature Specifications Caterpillar 4150548 E...
Страница 51: ...SECTION 2 GENERAL 3121234 2 13 Figure 2 4 Engine Operating Temperature Specifications GM 4150548 E...
Страница 52: ...SECTION 2 GENERAL 2 14 3121234 NOTES...
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Страница 87: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 35 Figure 3 26 Assembly Tools Bearing Cone Pressing A Bearing...
Страница 88: ...SECTION 3 CHASSIS TURNTABLE 3 36 3121234 Figure 3 27 Assembly Tools Bearing Cup Pressing A B Bearings...
Страница 89: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 37 Figure 3 28 Assembly Tools Seal Pressing...
Страница 90: ...SECTION 3 CHASSIS TURNTABLE 3 38 3121234 Figure 3 29 Assembly Tools Spacer Brake Disc Installation...
Страница 91: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 39 Figure 3 30 Assembly Tools Brake Retaining Ring Installation...
Страница 139: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 87 Figure 3 62 Swing Hub Prior to SN 0300134352...
Страница 143: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 91 Figure 3 64 Swing Brake...
Страница 196: ...SECTION 3 CHASSIS TURNTABLE 3 144 3121234 Figure 3 82 Rotary Coupling Port Location Prior to SN 0300137913 5 1660303 B...
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Страница 206: ...SECTION 3 CHASSIS TURNTABLE 3 154 3121234 Figure 3 89 Generator Troubleshooting Circuit Diagram Sheet 1 of 2...
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Страница 208: ...SECTION 3 CHASSIS TURNTABLE 3 156 3121234 Figure 3 91 Generator Electrical Circuit Diagram...
Страница 209: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 157 Figure 3 92 Power Board PC1 Electrical Circuit Diagram...
Страница 210: ...SECTION 3 CHASSIS TURNTABLE 3 158 3121234 Figure 3 93 Power Board PC2 Electrical Circuit Diagram Sheet 1 of 2...
Страница 211: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 159 Figure 3 94 Power Board PC2 Electrical Circuit Diagram Sheet 2 of 2...
Страница 224: ...SECTION 3 CHASSIS TURNTABLE 3 172 3121234 Figure 3 103 EMR 2 Engine Side Equipment...
Страница 225: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 173 Figure 3 104 Deutz EMR 2 Troubleshooting Flow Chart...
Страница 226: ...SECTION 3 CHASSIS TURNTABLE 3 174 3121234 Figure 3 105 Deutz EMR 2 Vehicle Side Connection Diagram...
Страница 227: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 175 Figure 3 106 Deutz EMR 2 Engine Side Connection Diagram Sheet 1 of 2...
Страница 228: ...SECTION 3 CHASSIS TURNTABLE 3 176 3121234 Figure 3 107 Deutz EMR 2 Engine Side Connection Diagram Sheet 2 of 2...
Страница 229: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 177 Figure 3 108 EMR 2 Engine Plug Pin Identification...
Страница 230: ...SECTION 3 CHASSIS TURNTABLE 3 178 3121234 Figure 3 109 EMR 2 Vehicle Plug Pin Identification...
Страница 231: ...SECTION 3 CHASSIS TURNTABLE 3121234 3 179 Figure 3 110 EMR2 Fault Codes Sheet 1 of 5...
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Страница 286: ...SECTION 4 BOOM PLATFORM 4 22 3121234 Figure 4 7 Boom Assembly Cutaway Sheet 1 of 2 10 15 12 6 9...
Страница 333: ...SECTION 4 BOOM PLATFORM 3121234 4 69 Figure 4 25 Load Sensing Device...
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Страница 402: ...SECTION 5 BASIC HYDRAULICS INFORMATION SCHEMATICS 5 66 3121234 Figure 5 100 Fault logic Troubleshooting...
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Страница 423: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 7 Figure 6 2 ADE Block Diagram...
Страница 445: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 29 Figure 6 6 Analyzer Flow Chart Prior to Version 5 X Software Sheet 4 of 4...
Страница 447: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 31 Figure 6 8 Analyzer Flow Chart Version 5 X Software Sheet 2 of 4...
Страница 461: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 45 1 1001103667 Y Figure 6 22 Ground Control Module Sheet 1 of 3...
Страница 462: ...SECTION 6 JLG CONTROL SYSTEM 6 46 3121234 1 1001103667 Y Figure 6 23 Ground Control Module Sheet 2 of 3...
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Страница 464: ...SECTION 6 JLG CONTROL SYSTEM 6 48 3121234 CONNECTOR 1001141138 D Figure 6 25 Platform Control Module Sheet 1 of 2...
Страница 465: ...SECTION 6 JLG CONTROL SYSTEM 3121234 6 49 CONNECTOR 1001141138 D Figure 6 26 Platform Control Module Sheet 2 of 2...
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Страница 491: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 3121234 7 11 Figure 7 15 Connector Installation...
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