Park Tool DAG-3 Instrucciones

PARK TOOL CO.
5115 Hadley Ave. N., St. Paul, MN 55128 (USA) www.parktool.com
Proper alignment of a bike's derailleur hanger is important for reliable shifting. While a derailleur hanger can be bent when a bike is crashed or dropped on
its side, even new frames often have misaligned hangers. The Park Tool DAG-3 provides a simple, accurate means for checking hanger alignment and for
straightening hangers that are not properly aligned.
Toward Hub Toward Rim
INSTRUCTIONS
1. Install wheel in frame. Make sure rim is correctly centered in frame.
2. Remove derailleur from derailleur hanger.
3. Thread inside shaft into derailleur mounting hole.
4. Slide indicator so tip of indicator contacts outside edge of rim (position A).
5. Rotate indicator toward the hub so that the indicator is out of the way.
6. Rotate tool 180 degrees to position C.
7. Rotate indicator toward the rim. If the tip of the indicator is within 4mm of
outside edge of rim, the hanger is aligned horizontally. If tip of indicator is 4mm or
more away from rim, or if indicator presses against rim, the hanger is misaligned.
Rotate indicator toward the hub. Using the shaft of the tool as a lever to bend
hanger into alignment horizontally. Repeat checking and bending between
position A and C until clearance is less than 4mm.
8. After achieving correct horizontal alignment, keeping the indicator in the same
position, rotate the tool to position B. Rotate the indicator so that it is pointing
towards the rim. If the clearance between the rim and tip of the indicator is
less than 4mm, the hanger is aligned. If the clearance is greater than 4mm, or
if indicator presses against rim at position B or D, use the shaft of the tool as a
lever to bend hanger into alignment vertically.
9. With properly aligned hanger, the tip of the indicator should just contact the
outer edge of rim at one position and have no more than 4mm clearance at any of
the other positions. Check and align all four positions until this is accomplished.
DAG-3
Instructions
DAG-3 Derailleur Hanger Alignment Gauge
B
C
A
Always take
readings with
indicator at valve
hole to insure wheel
trueness will not
impact accuracy of tool. Also,
always take readings at outside edge of rim to minimize
errors that may be caused by rim's sidewall slope.
D