Case 580SR Service Manual page 651

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Checking and Adjusting Precharge Pressure
The precharge pressure of an ACP Series accumulator may be checked, and nitrogen filled or vented, using
the UCA Universal Charging & Gauging kit tool 380002714.
The kit assembly is screwed onto the accumulator's gas valve, allowing the precharge pressure to be checked
or reduced. If the precharge pressure is to be increased, the UCA can be connected to the nitrogen source with
the hose supplied. The kit is supplied with two pressure gauges, reading 0-25 bar and 0-250 bar; where a dif-
ferent pressure range is required, a commercially-available pressure gauge may be used.
UCA kit 380002714 see drawing
A. Inflation valve
B. Bleed valve
1. UCA
2. Adapter (long)
3. Adapter (short)
4. Adapter (insert)
5. Pressure gauge
6. Protective cap - gauge port
7. Collar - gas port
8. Knurled protective cap - filling port
9. Hose (G1/4 fitting, 60° cone) with O-ring
10. Valve
Z Remove the protective cover and cap (11) from the
accumulator, to gain access to the gas valve (12).
Z Select the appropriate pressure gauge (5) for the
pressure to be checked, remove the protective cap
(6) and attach the gauge to the UCA (1).
Z Make sure that the bleed valve (B) is fully closed
and that the inflation valve (A) is in the fully raised
position by turning the handwheel in an counter-
clockwise direction.
Z Assemble the short adapter and adapter insert (3
and 4), screw onto the gas valve (13) and hand
tighten.
Z Screw the UCA onto the adapter. Position the as-
sembly to permit easy reading of the gauge, then
hand tighten the collar (7).
Z Open the inflation valve (A) by screwing the hand-
wheel clockwise until the inflation pressure regis-
ters on the gauge.
SECTION 35 - HYDRAULIC SYSTEM
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