
SECTION 3 - TROUBLESHOOTING
3-8
– JLG Lift –
3120863
.
Table 3-3.Turntable Assembly - Troubleshooting
TROUBLE
PROBABLE CAUSE
REMEDY
CONTROL VALVE.
Valve Spool Sticking.
Dirt in oil causing excessive temperature built-
up.
Change oil using recommended viscosity and
flush system.
Incorrect valve mounting causing warping of the
unit.
Loosen valve and check mounting.Repair as
necessary.
Valve spool scored.
Remove valve and repair or replace as neces-
sary.
Return spring weak or broken.
Remove valve and repair or replace as neces-
sary.
Relief valve malfunctioning causing excessive
pressure within valve.
Check pressure delivery to and from valve and
repair or replace as necessary.
Valve leaking.
Dirt or other foreign material under seal.
Remove and replace valve as necessary.
Valve spool scored.
Repair or replace valve.
Excessive back pressure caused by restricted
return line to reservoir.
Remove line and clear obstruction or replace line
as necessary.
Damaged valve seals.
Repair or replace valve as necessary.
Содержание 80HX
Страница 2: ......
Страница 10: ...vi JLG Lift 3120863 TABLE OF CONTENTS Continued THIS PAGE LEFT BLANK INTENTIONALLY...
Страница 16: ...SECTION 1 SPECIFICATIONS 1 6 JLG Lift 3120863 Figure 1 2 Lubrication Diagram...
Страница 27: ...SECTION 2 PROCEDURES 3120863 JLG Lift 2 5 Figure 2 1 Proportional Control Valve...
Страница 34: ...SECTION 2 PROCEDURES 2 12 JLG Lift 3120863 Figure 2 5 Typical Hydraulic Cylinders Sheet 1 of 4...
Страница 35: ...SECTION 2 PROCEDURES 3120863 JLG Lift 2 13 Figure 2 6 Typical Hydraulic Cylinders Sheet 2 of 4...
Страница 36: ...SECTION 2 PROCEDURES 2 14 JLG Lift 3120863 Figure 2 7 Typical Hydraulic Cylinders Sheet 3 of 4...
Страница 37: ...SECTION 2 PROCEDURES 3120863 JLG Lift 2 15 Figure 2 8 Typical Hydraulic Cylinders Sheet 4 of 4...
Страница 44: ...SECTION 2 PROCEDURES 2 22 JLG Lift 3120863 Figure 2 12 Boom Assembly Sheet 1 of 2...
Страница 45: ...SECTION 2 PROCEDURES 3120863 JLG Lift 2 23 Figure 2 13 Boom Assembly Sheet 2 of 2...
Страница 53: ...SECTION 2 PROCEDURES 3120863 JLG Lift 2 31 Figure 2 16 Adeco Actuator Adjustments F4L912...
Страница 59: ...SECTION 2 PROCEDURES 3120863 JLG Lift 2 37 Figure 2 22 Pressure Setting All Hydraulic Machines Sheet 1 of 4...
Страница 60: ...SECTION 2 PROCEDURES 2 38 JLG Lift 3120863 Figure 2 23 Pressure Setting All Hydraulic Machines Sheet 2 of 4...
Страница 61: ...SECTION 2 PROCEDURES 3120863 JLG Lift 2 39 Figure 2 24 Pressure Setting All Hydraulic Machines Sheet 3 of 4...
Страница 62: ...SECTION 2 PROCEDURES 2 40 JLG Lift 3120863 Figure 2 25 Pressure Setting All Hydraulic Machines Sheet 4 of 4...
Страница 64: ...SECTION 2 PROCEDURES 2 42 JLG Lift 3120863 Figure 2 27 Solenoid Valve Pressure Settings 4 Wheel Steer...
Страница 65: ...SECTION 2 PROCEDURES 3120863 JLG Lift 2 43 Figure 2 28 Extend A Reach Valve Pressure and Speed Settings...
Страница 68: ...SECTION 2 PROCEDURES 2 46 JLG Lift 3120863 Figure 2 32 Swing Bearing Torquing Sequence...
Страница 70: ...SECTION 2 PROCEDURES 2 48 JLG Lift 3120863 Figure 2 33 Torque Hub Assembly...
Страница 78: ...SECTION 2 PROCEDURES 2 56 JLG Lift 3120863 Figure 2 34 Drive Brake Ausco Machines Built Prior to 1992...
Страница 80: ...SECTION 2 PROCEDURES 2 58 JLG Lift 3120863 Figure 2 35 Drive Brake Mico Machines Built from 1992 to Present...
Страница 108: ...SECTION 3 TROUBLESHOOTING 3 20 JLG Lift 3120863 Figure 3 1 Wiring Schematic Sheet 1 of 4...
Страница 109: ...SECTION 3 TROUBLESHOOTING 3120863 JLG Lift 3 21 Figure 3 2 Wiring Schematic Sheet 2 of 4 1870003A...
Страница 110: ...SECTION 3 TROUBLESHOOTING 3 22 JLG Lift 3120863 Figure 3 3 Wiring Schematic Sheet 3 of 4...
Страница 111: ...SECTION 3 TROUBLESHOOTING 3120863 JLG Lift 3 23 Figure 3 4 Wiring Schematic Sheet 4 of 4 1870003A...
Страница 112: ...SECTION 3 TROUBLESHOOTING 3 24 JLG Lift 3120863 Figure 3 5 Hydraulic Schematic Sheet 1 of 6...
Страница 113: ...SECTION 3 TROUBLESHOOTING 3120863 JLG Lift 3 25 Figure 3 6 Hydraulic Schematic Sheet 2 of 6 2792231...
Страница 114: ...SECTION 3 TROUBLESHOOTING 3 26 JLG Lift 3120863 Figure 3 7 Hydraulic Schematic Sheet 3 of 6...
Страница 115: ...SECTION 3 TROUBLESHOOTING 3120863 JLG Lift 3 27 Figure 3 8 Hydraulic Schematic Sheet 4 of 6 2792231...
Страница 116: ...SECTION 3 TROUBLESHOOTING 3 28 JLG Lift 3120863 Figure 3 9 Hydraulic Schematic Sheet 5 of 6...
Страница 117: ...SECTION 3 TROUBLESHOOTING 3120863 JLG Lift 3 29 Figure 3 10 Hydraulic Schematic Sheet 6 of 6 2792231...
Страница 118: ...SECTION 3 TROUBLESHOOTING 3 30 JLG Lift 3120863 This page left blank intentionally...
Страница 119: ......