MANUAL.LM20 Revision C January 2023 Page 31 of 52
Picture 6 - Charging Accumulator
7. Let the pre-charge set for 10 to 15 minutes. This will allow the gas temperature to stabilize. If
the desired pre-charge is exceeded, close nitrogen bottle valve, then slowly open bleed valve
(Figure 7). Do not reduce pre-charge by depressing valve core with a foreign object. High
pressure may rupture rubber valve seat.
8. When finished pre-charging accumulator, turn “T” handle all the way out on gas chuck (Figure
3-3), then open bleed valve.
9. Hold gas valve to keep from turning, loosen swivel nut, remove assembly. Check for pre-charge
leak using a common leak reactant.
10. Replace gas valve cap (10-15 in. lbs.) (11.5-17 cm kg) and valve guard. (Gas valve cap serves as
a secondary seal.)
! WARNING: NEVER TURN ON THE PUMP WITHOUT FIRST CHARGING THE ACCUMULATOR.
Figure 7 - Nitrogen Charging Assembly
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