allen BDF4836B, Safety & Operation Manual

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G. Roller Direction Valves
The directional valves will permit the rollers to rotate forward,
remain in neutral or rotate in reverse. The operator should choose the
favored setting before the initial carriage pass and push the levers to
the up, middle or down locations.
H. Automatic Roller Reversing Valve
The automatic roller reversing valve has two positions. When
the handle is turned to the non-reversing position (left) the directional
valves will continue to control the direction of the roller rotation. When
the handle is turned to the reversing position (right) the rollers will
reverse their rotation just before the carriage ends its pass and reverse
its direction on the truss.
I. Carriage Lift Valve (Option)
Lifts and lowers carriage.
J. Roller Tamper Speed Control
Located on the roller tamper frame. Controls the vibration speed
of the roller tamper. The vibration frequency ranges from 0 to 6000
VPMS.
Roller Directional Valves
SECTION 2
OPERATIONS
050362 Page 27
2.2 - Machine Control Detail, continued