5115 Hadley Ave. N., St. Paul, MN 55128 (USA) www.parktool.com
PARK TOOL CO.
Facing Disc Brake Flat Mounts
A. Determine axle type, axle size and dropout width of frame/fork. Assemble
DT-5.2 as shown. Using pinch bolt in axle collar (#29), adjust axle width to
match the width of the frame or fork.
B. Install axle of assembled DT-5.2 securely into frame or fork dropouts.
C. Loosen pivot bolt (#6), pinch bolt in body (#1) and pinch bolt in stop collar
(#3) just enough to allow parts to slide, pivot and rotate.
D. If facing flat mounts on frame: Place two unthreaded alignment studs
(#24) into the holes in the mounts. Adjust arm (#8) so the two “wings”
simultaneously contact the two alignment studs. Tighten pivot bolt (#6) to
lock position. Then tighten pinch bolt in body (#1) to lock position.
If facing flat mounts on fork: Install two threaded alignment studs (#27)
into the threaded holes in the mounts. Adjust arm (#8) so the two “wings”
simultaneously contact the two alignment studs. Tighten pivot bolt (#6) to
lock position. Then tighten pinch bolt in body (#1) to
lock position.
E. If facing flat mounts on frame: Install knob (#9) on arm (#8). Two pilot
bolts are included with DT-5.2. When facing flat mounts on the frame, the
pilot bolt with the 5mm pilot (#28) should be installed on the arm. If facing
flat mounts on fork: Install knob (#9) and on arm (#8). Two pilot bolts are
included with DT-5.2. When facing flat mounts on the fork, the pilot bolt
with the 4mm pilot (#26) should be installed on the arm.
F. Loosen pivot bolt (#6) and lift arm (#8) and slider (#11) on shaft (#2).
Remove the two alignment studs (#24 or #27) then pivot and rotate arm
and slider as needed to insert pilot of cutter into hole on lower mount.
Tighten pivot bolt (#6) to lock position.
G. Turn knob (# 9) clockwise while applying hand pressure to face mount.
Use appropriate cutting fluid (such as Park Tool CF-2 Cutting Fluid) and
cut only the minimum necessary for a flat mounting surface. NOTE: For
speed, a ratcheting wrench with an 8mm hex bit or a Park Tool PH-8 Hex
Wrench can be used to turn the knob.
H. With teeth of cutter contacting face of lower mount, move stop collar
(#3) until it contacts slider (#11). Tighten pinch bolt in stop collar to lock
position. This sets the height of the cutter and prevents further cutting.
I. Slightly loosen pivot bolt (#6). Lift arm (#8) and slider (#11) on shaft (#2)
then pivot and rotate as needed to insert pilot of cutter into hole on upper
mount. Tighten pivot bolt to lock position.
J. Note position of teeth on cutter.If teeth of cutter contact the upper
mount and there is a gap between the stop collar (#3) and the slider (#11),
complete step K and stop.If the stop collar (#3) contacts the slider (#11)
before teeth of the cutter contact the upper mount, skip step K and go
straight to steps L through P.
K. Turn knob (#9) clockwise while applying hand pressure to face surface of
upper mount. Continue facing mount until stop collar (#3) contacts slider
(#11). The facing process is complete. Remove DT-5 from frame/fork.
L. Loosen pinch bolt in stop collar (#3).
M. Turn knob (#9) clockwise while applying hand pressure to face surface of
upper mount.
N. With teeth of cutter contacting face of upper mount, move stop collar
(#3) until it contacts slider (#11). Tighten pinch bolt in stop collar to lock
position.
O. Slightly loosen pivot bolt (#6). Lift arm (#8) and slider (#11) on shaft (#2)
then pivot and rotate as needed to insert pilot of cutter into hole on lower
mount. Tighten pivot bolt to lock position.
P. Turn knob (#9) clockwise while applying hand pressure to face surface of
lower mount. Continue facing mount until stop collar (#3) contacts slider
(#11). The facing process is complete. Remove DT-5.2 from frame/fork.
DT-5.2 Instructions
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