SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
3121619
5-137
4.
After establishing the desired maximum displacement
setting, hold adjusting screw in place and tighten the
locknut. Torque to 23 Nm [17 lbft]. C
BE SURE SERVO CYLINDER DOES NOT ROTATE WHEN DISPLACEMENT LIM-
ITER LOCKNUT (E550) IS TORQUED.
5.
One turn of the adjusting screw will change the maxi-
mum displacement approximately as follows.
CONTROL NEUTRAL ADJUSTMENT
All functions of the Electric Displacement Control (EDC) are
preset at the factory. Adjust the pump to neutral with the
pump running on a test stand or on the vehicle/machine with
the prime mover operating. If adjustment fails to give satisfac-
tory results, you may need to replace the control or coils.
1.
Install a 50 bar [1000 psi] gauge in each of the two servo
gauge ports (M4 and M5). Disconnect the external con-
trol input (electrical connections) from the control. Start
the prime mover and operate at normal speed.
2.
Use a 4mm internal hex wrench to hold the neutral
adjusting screw stationary while loosening the locknut
with a 13mm wrench.
3.
Observe pressure gauges. If necessary, turn adjusting
screw to reduce any pressure differential.
NOTE:
Adjustment of the EDC is very sensitive. Be sure to hold the
hex wrench steady while loosening the locknut. Total
adjustment is less than 120 degrees.
4.
Rotate the neutral adjusting screw clockwise until the
pressure increases on the gauge. Note the angular posi-
tion of the wrench. Then rotate the neutral adjusting
screw counterclockwise until the pressure increases by
an equal amount on the other gauge. Again note the
angular position of the wrench.
Table 5-40. Displacement Limiter Adjustment Data
Displacement
Locknut wrench
size and torque
Adjusting screw
size
Approximate
displacement
change per
revolution of
adjusting screw
45
13 mm 23 Nm [17 lbft] 4 mm internal hex
5.1 cc / turn
Locknut
13 mm
Neutral adjusting screw
4 mm
10 N•m
[7 lbf•ft]
Servo pressure gauge port M5
Servo pressure gauge port M4
0 - 50 bar [0 - 1000 psi]
3/16 in
12 N•m [9 lbf•ft]
0 - 50 bar [0 - 1000 psi]
3/16 in
12 N•m [9 lbf•ft]
Servo pressure gauge port M4
0 - 50 bar [0 - 1000 psi]
3/16 in
12 N•m [9 lbf•ft]
Servo pressure gauge port M5
0 - 50 bar [0 - 1000 psi]
3/16 in
12 N•m [9 lbf•ft]
Figure 5-132. Control Neutral Adjustment
Solenoid shaft
Feedback pin
Adjusting
screw
(cam)
Maximum
adjustment
less than 120°
Control spool
Illustration shows how eccentric cam on
adjusting screw rotates to adjust neutral.
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: ......