CAUTION: To avoid injury from escaping fluid
under pressure, never loosen boom manual
lower needle valve more than 4 turns from
closed position as valve may come out of
housing. Tighten valve and nut before applying
Prevent possible injury from unexpected
machine movement. Clear all persons from the
area before lowering the boom with the engine
1. Check that the area is clear of all persons before
2. Loosen jam nut on relief valve (A). Back off relief valve
set screw, counting number of turns, until boom starts
to lower slowly.
3. After bucket is on ground, reset relief valve (A) by
turning set screw clockwise the same number of turns
noted in step 2 and lock jam nut.