Great Plains NP3000A Predelivery Manual - Manual (Page 18)

407-613Q Table of Contents Index 03/31/2011
14 NP3000 Table of Contents Index Great Plains Manufacturing, Inc.
Prepare Hydraulics
Crushing Hazards / Equipment Damage Risk:
Do not operate the hydraulic systems until charged. If there is
air in any part of the systems, wings could fall suddenly, and
sections could lift unevenly, or fall suddenly. Anyone in the
path of movement could be seriously injured or killed. Major
equipment damage is possible.
High Pressure Fluid Hazard:
Relieve pressure before disconnecting hydraulic lines.Wear
protective gloves and safety glasses or goggles when working
with hydraulic systems. Use a piece of paper or cardboard,
NOT BODY PARTS, to check for suspected leaks. Escaping
fluid under pressure can penetrate the skin, causing serious
injury. If an accident occurs, seek immediate medical assis-
tance from a physician familiar with this type of injury.
Bleed only at JIC and NPT fittings.
Never try to bleed a QD (Quick Disconnect) fitting.
Avoid bleeding at ORB fittings. The O-ring is likely to be
torn if any pressure remains in the circuit.
Hydraulics
Disable Weight Transfer
Refer to Figure 21 (which depicts the shut-off valve closed)
1.
Release the locking discs ( , ) on both valves.
2. Close the bypass valve (the valve without the
pressure gauge ) by turning the control knob
fully clockwise.
3. Open the pressure reducing valve by turning the
control knob fully counter-clockwise.
4. Open the shut-off valve . Set the handle to in-line
with the valve.
These settings are for hydraulic charge only. Initial field
values are set later at “Set Rough Weight Transfer” on
page 25.
JIC Torque Chart
Over-Torque and Leak Risks:
JIC (Joint Industry Conference 37
° Flare) fittings do not
require high torque. Excess torque causes leaks. JIC and
ORB (O-Ring Boss) fittings do not require sealant.
Size Foot-Pounds N-m
7 ⁄
16
-20 11-12 15-16
1 ⁄
2
-20 15-16 20-22
5 ⁄
16
-18 18-20 24-28
3 ⁄
4
-16 38-42 52-58
7 ⁄
8
-14 57-62 77-85
11 ⁄
16
-12 79-87 108-119
ll
Figure 21
Weight Transfer Adjustment
32041
6
3
2
5
1
7
4
8
1 2
3
4 5
6
7
8