Ashland I-160 XL - Manual (Page 20)

20
SEQUENCE VALVE
The sequence valve controls two hydraulic circuits with one hydraulic remote. Ash-
land Industries incorporates a sequence valve to control the Apron and Pushoff cylinder
systems. When the tractors hydraulic remote is activated, oil flows first to the apron cylin-
ders until they are fully extended. Once the cylinder s are fully extended, the apron circuits’
hydraulic pressure begins to increase. Once the pressure threshold is surpassed (which is
adjustable. See adjustment section), the sequence valve diverts the oil flow to the pushoff’s
hydraulic circuit. Once the pushoff is completely extended the operator then reverses the
tractors hydraulic remote. This will direct oil first to the Apron circuit. Once the aprons
cylinders are fully retracted, again the hydraulic pressure begin to increase allowing the
pushoff to retract fully once the oil has been diverted from the sequence valve.
INSTRUCTIONS for establishing sequence valve setting:
Remove acorn nut from end of sequence valve with a 1/2” wrench. Turn adjustment
screw, using a 4mm hex wrench, clockwise until front apron rises before the push-off
advances while the earthmover is empty. Turn the adjustment screw an additional 1/4 turn
clockwise, then replace the acorn nut and tighten. Torque check valve assembly and inter-
nal pilot plug to 25 ft.-lbs. maximum.