Tilton 700-Series Hydraulic Release Bearing (98-1115) - Manual

Tilton's Acura/Honda hydraulic release bearing assembly installs easily into any late model
(92'-on) hydraulic transmission when converting to a Tilton 2-plate 7.25" Carbon/Carbon or
Cerametallic clutch. Carbon/Carbon clutches use assembly 61-772 and Cerametallic clutches
use assembly 61-777. These assemblies eliminate the stock mechanical release bearing link-
age, slave cylinder, and all of its components. The Tilton hydraulic release bearing is ideal
for racing and high performance use. Our release bearing components are machined out of
billet aluminum, which results in a higher strength and lighter weight design. Each hydraulic
assembly comes complete with hydraulic lines and fittings.
The hydraulic release bearing assembly is self-adjusting in that the bearing stays close to the
clutch spring at all times even though the spring changes position with clutch wear. There is
no extra return spring that pulls the piston back all the way to the bottomed position. In this
respect, the piston in the hydraulic bearing assembly works like the piston in a disc brake
caliper, returning only as far as forced. This is why with a Tilton Hydraulic Release Bearing
assembly the clutch pedal feel does not change with clutch wear allowing the driver to make
more consistent shifts.
INSTALLATION
1. Remove the original equipment (OE) from the front of the gearbox, including the release
fork, release fork pivot, and slave cylinder.
2. Apply a small amount of grease to the pilot nose to allow the o-ring located in the inter-
nal bore to slide on easily.
3. Install the Tilton bearing assembly onto the front of the gearbox so that both hydraulic
lines can be routed out the existing clutch release fork hole in the gearbox.
4. Insure that the assembly is seated flush with the bottom of the pilot tube.
5. The heights of the installed assemblies are 1.63" for P/N 61-772 and 1.70" for P/N 61-777
when the piston is fully retracted as seen in Diagram 1. These heights are measured from
the bearing face to the flange mounting surface.
Note: The mounting surface is not the lower-most surface on the Honda
HRB's, it is the smaller ring recessed .100" from the bottom.
6. Please verify that there is approximately .200" clearance between the bearing face and
the clutch diaphragm spring upon installation, as seen in Diagram 1.
Note: Compression of the bearing piston into the bearing base, prior to
installation, to seat the seal may be required to achieve the set-up height
dimension.
7. A pedal stop must be installed on the clutch pedal to prevent over stroking the hydraulic
release bearing and damaging the clutch (see Pedal Stop section).
HYDRAULIC LINE INSTALLATION
Note: Fittings supplied in kit are -3AN 90˚ banjo fittings. It is important that
the crush washers used with the banjo fittings are replaced if the banjo fit-
tings are removed from this hydraulic base. DO NOT use PTFE tape or thread
sealer. The single hydraulic line included in the kit is to be used to make both
the supply line and bleed lines.
700-Series Hydraulic Release Bearing (Acura/Honda)
INSTALLATION INSTRUCTIONS
98
-111
5
Diagram 1
61-772
(2-Plate Cerametallic)
61-777
(2-Plate Carbon)