I-2 / I-3 Valve Preliminary Settings
August 2019 - 89130 v.3.0 9
Lowering and Leveling Speed Setting
To prevent damage to the piston face and seat, do not adjust the lowering and
leveling screw unless the car is resting on the buffers or the car is in motion.
1. Lower the car onto the buffers.
2. Adjust the lowering and leveling screw so that
3
/
4
" extends beyond the valve body.
See Figure 3.
3. Ensure the flat end of the screw points 45° counterclockwise to the tank return line.
4.
Tighten the locknut.
Figure 3 - Lowering and Leveling Speed Setting
Adjustment Needles
To make adjustments, do not loosen the nuts on the adjustment needle stems. The nuts
must be snug against the valve body at all times.
1. Turn the down start, down stop, and down slowdown adjustments IN to the fully
closed position. See Figure 2 on page 8.
2. Turn the down start adjustment OUT 9 turns.
3. Turn the down stop adjustment OUT 10 turns.
4. Verify that the down slowdown adjustment remains closed.
Tank Return Line
ƺ/Dž"
45º
Flat End
of Screw
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