PAGE 2.1 - 54 OPERATION MARK IV HD J2 TAMPER
REVISED 10 - 2020 CONTROLS BULLETIN 5082505
2.1
2.1.11 Operator Keypad Controls - Right - See Figure 2.1-35
(C) Cursor Key Group - Outlined in GREEN
(16) Arrow Curved Left Key
(17) Arrow Curved Right Key
Each time an Arrow Curved Left or Right Key is pressed, a super elevation or cross level
correction of 1/32 inch is applied in the appropriate direction. The correction is displayed in the
Cross level Panel (when the top red correction arrow is in line with center black arrow the
correction is zero).
The rotation implied by the arrows on these keys also indicates the effect they have on super
elevation when looking forward. The Arrow Curved Left Key moves the red cross level
correction arrow to the left which will raise the right rail. The Arrow Curved Right Key moves the
red cross level correction arrow to the right which will raise the left rail.
Important: After a correction is applied using these keys, the effect of the correction will not be
seen by the inclinometer (the green trace in the crosslevel panel) until the machine has worked
approximately 15 feet, which is the distance between the shadowboard (where the correction is
applied) and the receiver buggy (where the inclinometer is mounted).
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