SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
5-136
3121619
Adjustments
CONTAMINATION CAN DAMAGE INTERNAL COMPONENTS AND VOID YOUR
WARRANTY. TAKE PRECAUTIONS TO ENSURE SYSTEM CLEANLINESS WHEN
REMOVING AND REINSTALLING SYSTEM LINES
1.
Thoroughly clean the outside of the pump.
2.
If removing the pump, tag each hydraulic line. When you
disconnect hydraulic lines, cap them and plug each
open port to prevent contamination.
3.
Ensure the surrounding area is clean and free of contam-
inants like dirt and grime.
4.
Inspect the system for contamination.
5.
Check the hydraulic fluid for signs of contamination: oil
discoloration, foam in the oil, sludge, or metal particles.
6.
If there are signs of contamination in the hydraulic fluid,
replace all filters and drain the hydraulic system. Flush
the lines and refill the reservoir with the correct filtered
hydraulic fluid.
7.
Before reinstalling the pump, test for leaks.
CHARGE PRESSURE RELIEF VALVE.
1.
Install a 50 bar [1000 psi] pressure gauge in charge pres-
sure gauge port M3. Install a 10 bar [100 psi] gauge at
case pressure port L1, L2, or L3. Operate the system with
the pump in neutral (zero displacement) when measur-
ing charge pressure.
2.
The table below shows the acceptable pump charge
pressure range for some nominal charge relief valve set-
tings (refer to model code located on serial number
plate). These pressures assume 1800 min-1 (rpm) pump
speed and a reservoir temperature of 50°C [120°F], and
are referenced to case pressure.
NOTE:
Listed pressures assume a pump speed of 1800 min-1 (rpm)
and charge flow of 26.5 l/min [7 US gal/min]. At higher
pump speeds or higher charge flows the charge pressure
will rise over the rated setting.
3.
Loosen the locknut and rotate the adjusting screw
clockwise to increase the setting; counterclockwise to
decrease it. Subtract the case pressure reading to com-
pute the actual charge pressure.
NOTE:
Pressure change per turn is dependent on charge flow
entering pump.
4.
While holding the adjusting screw, torque locknut to 12
Nm [9 lbft].
5.
When you achieve the desired charge pressure setting,
remove the gauges and plug the ports.
DISPLACEMENT LIMITER ADJUSTMENT
1.
Mark servo cylinder location in case it rotates during dis-
placement limiter adjustment.
2.
Loosen the locknut (E550).
3.
Rotate the adjusting screw (E450) based on the follow-
ing table. Rotating the adjusting screw clockwise
decreases the maximum displacement of the pump
while rotating the adjusting screw counterclockwise
increases the maximum displacement.
Adjusting screw
5 mm
Locknut
19 mm
Case drain port L2
12 N•m
[9 lbf•ft]
0 - 10 bar [0 - 100 psi]
9/16 in
115 N•m [85 lbf•ft]
Charge pressure gauge port M3
0 - 50 bar [0 - 1000 psi]
1/4 in
24 N•m [17 lbf•ft]
Figure 5-131. Charge Pressure Adjustment
4 mm
13 mm
23 N•m
[17 lbf•ft]
E450
E550
Summary of Contents for 1850SJ
Page 1: ...Service and Maintenance Manual Model 1850SJ 3121619 June 29 2018 Rev J AS NZS...
Page 2: ......
Page 21: ...3121619 xvii LIST OF FIGURES FIGURE NO TITLE PAGE NO Thispageleftblankintentionally...
Page 24: ...xx 3121619 LIST OF TABLES TABLE NO TITLE PAGE NO Thispageleftblankintentionally...
Page 50: ...SECTION 2 GENERAL 2 12 3121619 NOTES...
Page 55: ...SECTION 3 CHASSIS TURNTABLE 3121619 3 5 This page left blank intentionally...
Page 56: ...SECTION 3 CHASSIS TURNTABLE 3 6 3121619 Figure 3 4 Axle Hose Routing Sheet 1 of 2...
Page 57: ...SECTION 3 CHASSIS TURNTABLE 3121619 3 7 Figure 3 5 Axle Hose Routing Sheet 2 of 2...
Page 58: ...SECTION 3 CHASSIS TURNTABLE 3 8 3121619 Figure 3 6 Steering Axle Hydraulic Circuit...
Page 61: ...SECTION 3 CHASSIS TURNTABLE 3121619 3 11 Figure 3 9 Turntable Hydraulic System...
Page 92: ...SECTION 3 CHASSIS TURNTABLE 3 42 3121619 Figure 3 39 Swing Bearing Wear Tolerance...
Page 94: ...SECTION 3 CHASSIS TURNTABLE 3 44 3121619 Figure 3 41 Swing Bearing Removal Sheet 2 of 4...
Page 110: ...SECTION 3 CHASSIS TURNTABLE 3 60 3121619 Figure 3 54 Engine Electrical Circuit...
Page 169: ...SECTION 4 BOOM PLATFORM 3121619 4 7 Figure 4 1 Boom Hydraulic System...
Page 173: ...SECTION 4 BOOM PLATFORM 3121619 4 11 Figure 4 2 Boom Assembly Sheet 1 of 9...
Page 174: ...SECTION 4 BOOM PLATFORM 4 12 3121619 Figure 4 3 Boom Assembly Sheet 2 of 9...
Page 175: ...SECTION 4 BOOM PLATFORM 3121619 4 13 Figure 4 4 Boom Assembly Sheet 3 of 9...
Page 176: ...SECTION 4 BOOM PLATFORM 4 14 3121619 Figure 4 5 Boom Assembly Sheet 4 of 9...
Page 177: ...SECTION 4 BOOM PLATFORM 3121619 4 15 Figure 4 6 Boom Assembly Sheet 5 of 9...
Page 178: ...SECTION 4 BOOM PLATFORM 4 16 3121619 Figure 4 7 Boom Assembly Sheet 6 of 9...
Page 179: ...SECTION 4 BOOM PLATFORM 3121619 4 17 Figure 4 8 Boom Assembly Sheet 7 of 9...
Page 180: ...SECTION 4 BOOM PLATFORM 4 18 3121619 Figure 4 9 Boom Assembly Sheet 8 of 9...
Page 181: ...SECTION 4 BOOM PLATFORM 3121619 4 19 Figure 4 10 Boom Assembly Sheet 9 of 9...
Page 187: ...SECTION 4 BOOM PLATFORM 3121619 4 25 Figure 4 16 Boom Assembly Torque Values Sheet 1 of 4...
Page 188: ...SECTION 4 BOOM PLATFORM 4 26 3121619 Figure 4 17 Boom Assembly Torque Values Sheet 2 of 4...
Page 189: ...SECTION 4 BOOM PLATFORM 3121619 4 27 Figure 4 18 Boom Assembly Torque Values Sheet 3 of 4...
Page 190: ...SECTION 4 BOOM PLATFORM 4 28 3121619 Figure 4 19 Boom Assembly Torque Values Sheet 4 of 4...
Page 201: ...SECTION 4 BOOM PLATFORM 3121619 4 39 Figure 4 20 Hose Adjustment...
Page 202: ...SECTION 4 BOOM PLATFORM 4 40 3121619 Figure 4 21 Section 3 Boom Cables...
Page 203: ...SECTION 4 BOOM PLATFORM 3121619 4 41 Figure 4 22 Section 4 Boom Cables...
Page 204: ...SECTION 4 BOOM PLATFORM 4 42 3121619 Figure 4 23 Section 5 Boom Cables...
Page 205: ...SECTION 4 BOOM PLATFORM 3121619 4 43 Figure 4 24 Jib Hydraulics Sheet 1 of 7...
Page 234: ...SECTION 4 BOOM PLATFORM 4 72 3121619 Figure 4 44 Powertrack Shimming Instructions...
Page 239: ...SECTION 4 BOOM PLATFORM 3121619 4 77 Figure 4 49 Powertrack Hose Installation Sheet 1 of 4...
Page 240: ...SECTION 4 BOOM PLATFORM 4 78 3121619 Figure 4 50 Powertrack Hose Installation Sheet 2 of 4...
Page 241: ...SECTION 4 BOOM PLATFORM 3121619 4 79 Figure 4 51 Powertrack Hose Installation Sheet 3 of 4...
Page 242: ...SECTION 4 BOOM PLATFORM 4 80 3121619 Figure 4 52 Powertrack Hose Installation Sheet 4 of 4...
Page 252: ...SECTION 4 BOOM PLATFORM 4 90 3121619 NOTES...
Page 432: ...SECTION 5 BASIC HYDRAULIC INFORMATION HYDRAULIC SCHEMATICS 5 180 3121619 NOTES...
Page 527: ...SECTION 6 JLG CONTROL SYSTEM 3121619 6 95 Figure 6 36 LSS Installation Sheet 1 of 4...
Page 528: ...SECTION 6 JLG CONTROL SYSTEM 6 96 3121619 Figure 6 37 LSS Installation Sheet 2 of 4...
Page 529: ...SECTION 6 JLG CONTROL SYSTEM 3121619 6 97 Figure 6 38 LSS Installation Sheet 3 of 4...
Page 530: ...SECTION 6 JLG CONTROL SYSTEM 6 98 3121619 Figure 6 39 LSS Installation Sheet 4 of 4...
Page 710: ...SECTION 7 BASIC ELECTRICAL INFORMATION ELECTRICAL SCHEMATICS 7 118 3121619 NOTES...
Page 711: ......