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Most don't want to see > 15 psig, no limit on vacuum. Drain gear oil 1st. Should hold some pressure or vacuum for at least 45 minutes. If leaking, submerge LU to find leak.
Most don't want to see > 15 psig, no limit on vacuum. Drain gear oil 1st. Should hold some pressure or vacuum for at least 45 minutes. If leaking, submerge LU to find leak.
