67
MAINTENANCE
BOOM BYPASS VALVE:
REPLACE O-RING:
IMPORTANT: Before performing any
maintenance, make sure line pressure is
relieved and engine is shut off.
1. Unscrew the Adjustment Knob. Replace
O-Ring.
2. Replace Adjustment Knob.
PRESSURE DAMPENER (SEE FIG. 6):
1. Dampener operates most effectively with
0 psi precharge.
2. If fluid is present when Air Pressure is checked,
the Diaphragm has ruptured.
3. Diaphragm in Dampener can be changed by
removing the bolts holding the Dampener halves
together, replacing the Diaphragm, and
reassembling.
FIG. 5
1. Distribution Valve Assembly
2. O-Ring
3. Adjustment Knob
1
1864
FIG. 6
1. Pressure Dampener 2. Bolts
2
1
2
3
1937-1200
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