Komatsu 830E-AC Shop Manual page 536

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HYDRAIR CHARGING KIT
Assemble service kit as shown in Figure 4-1 and
attach to container of pure dry nitrogen (8).
Installation of Charging Kit
1. Remove protective covers and charging valve
caps from suspensions to be charged.
2. Turn "T" handles (1, Figure 4-1) of adapters (2)
completely counterclockwise.
3. Ensure outlet valves (3) and inlet valve (4) are
closed (turned completely clockwise).
4. Turn swivel nut (small hex) on charging valve
three full turns counterclockwise to unseat the
valve.
FIGURE 4-1. HYDRAIR
NOTE: Arrangement of parts may vary from
illustration above, depending on Charging Kit P/N.
1. "T" Handle Valve
2. Charging Valve Adapter
3. Manifold Outlet Valves (from gauge)
4. Inlet Valve (from regulator)
5. Regulator Valve (Nitrogen Pressure)
6. Manifold
7. Charging Pressure Gauge (Suspensions)
8. Dry Nitrogen Gas (Specifications Figure 4-5)
H4-4
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CHARGING KIT
Oiling and Charging Procedures
5. Attach charging valve adapters (2) to each sus-
pension charging valve stem.
6. Turn "T" handles (1) clockwise (this will depress
core of charging valve and open the gas cham-
ber of the suspension).
7. Open both outlet valves (3).
NOTE: By selective opening and closing of outlet
valves (3), and inlet valve (4), suspensions may be
charged separately or together.
Removal of Charging Kit
1. Close both outlet valves (3).
2. Turn "T" handles (1) counterclockwise to
release charging valve cores.
3. Remove charging valve adapters (2) from
charging valves.
4. Tighten swivel nut (small hex) on charging
valve. If a new charging valve is being used,
tighten swivel nut to 14.2 N·m (10.5 ft lbs)
torque, then loosen and retighten swivel nut to
14.2 N·m (10.5 ft lbs) torque. Again loosen
swivel nut and retighten to 5.4 N·m (4 ft lbs)
torque. Replace valve cap (1) and tighten to 3.3
N·m (2.5 ft lbs) torque (finger tight).
5. Install charging valve caps and protective cov-
ers on both suspensions.
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