Tilton 9000 User Manual
INSTALLATION INSTRUCTIONS
9000-Series Hydraulic Release Bearing
DESCRIPTION
Tilton's 9000 series hydraulic release bearing is a compact assembly that is adaptable for
many dierent applications. The bearing is self-adjusting for clutch wear maintaining "near
zero" clearance at all times. There is no extra return spring that pulls the piston back to the
bottomed position. In this respect, the piston 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.
Note: The ports are -3AN that can accept straight or banjo ttings with
either a tapered seat or crush washer.
Note: If you need to take any measurements for clearance purposes fully
compress the piston. It is now partially extended.
INSTALLATION
There are a few dierent ways that the assembly can be mounted depending on the
particular part number and application. It is important to know that both ports are identi-
cal. It does not matter which port you use for the bleed port or the ll port. Position the
assembly in one of the two positions shown in Proper Bleed Port diagram to set up proper
bleed orientation.
1. In many applications the assembly and adapter bolt in place of the existing pilot tube
or in place of the original hydraulic release bearing.
2. For custom applications where you will make your own adapter see Figure 1 for the
mounting conguration. The two holes in the base are sized for both 1/4" and 6 mm
fasteners. You will want to locate (center) the assembly using the inner diameter of the
base. If there is an existing pilot tube it must be removed or trimmed to below the top
of the hydraulic release bearing base. Make sure that the adapter allows the HRB to be
installed in one of the two positions shown in the Proper Bleed Port diagram for cor-
rect bleed port set up.
If you are installing this assembly into a known application where the bearing clearance
and mounting conguration have already been determined proceed to the Hydraulic
Lines section.
PROPER BLEED PORT SET UP.
Position in one of two orientations for proper bleed port set up.
O
.266
ACCEPTS 1/4 AND
6mm FASTENERS
1.35
1.35
98 -1121
Figure 1
AN-3 PORT, 3/8-24 UNF THREADS.
PORTS WILL ALLOW STRAIGHT AND
BANJO FITTINGS. 2 PL.
55°
O 1.175
O 3.15
B
A
BLEED PORT
BOLT HOLE
±5
°
FROM
HORIZONTAL.
2.1.
20° ±5°
FROM VERTICAL
BLEED PORT
CONTACT
DIAMETER
1.73 (44mm)
PART NUMBER
61-9002
61-9012
SET UP HEIGHT "A"
1.95 2.55
2.02 2.67
.600
MAX. STROKE
EXTENDED HEIGHT "B"
MEASURING BEARING CLEARANCE
For new applications with unknown clearance
1. Install the ywheel and new clutch assembly as explained in their instructions. Worn friction
discs will generate false readings.
2. Press with a rm and even force to make sure that the piston in the hydraulic release bearing
is fully retracted.
3. Measure the distance "A" as shown in Figure 2. This is the distance from the engine/trans-
mission housing interface to the top of the hydraulic release bearing with the piston fully
retracted.
4. Measure the distance "B" shown in Figure 3. This is the distance from the engine/transmis-
sion housing interface to tips of the spring ngers on the clutch.
5. C=A-B. This is your bearing clearance. It should be in the range of .170 to .230" for Tilton 5.5"
and 7.25" clutches and .150" to .230" for The Tilton 4.5" clutch. This will allow the full wear
range of the clutch. If the clearance is outside of this range you will need to modify the posi-
tion of the hydraulic release bearing assembly.
HYDRAULIC LINES
Some assemblies include hydraulic lines. Cut braided line to length and attach ttings.
1. The ports are -3AN (3/8-24). Depending on the assembly part number the ttings could be
-3AN male or -3AN banjo style. The male ttings are made to seal on the taper and not the
threads. Do not use pipe tape or other sealants on any of the ttings.
2. The port coming out of the top must be connected to the bleed line. Route the bleed line
outside of the housing for easy access.
3. The other port connects to the master cylinder.
4. Route both lines clear of heat sources such as the exhaust system. Also make sure that the
lines will stay clear of the clutch and y wheel.
MASTER CYLINDER SELEC TION AND PRIMING
1. The 9000 Series is intended to be used with a 5/8" master cylinder and a Tilton 7.25" Clutch.
A 7/10" master cylinder can also be used. It will take a greater force at the pedal and require
less stroke to release the clutch.
2. Fill the master cylinder with a DOT 3 or Dot 4 compatible uid. DOT 5 (silicone-based. uids
are not compatible with the seals. Special high temperature uids are not required and usu-
ally shorten the seal life.
3. Have a port or bleed tting open at the master cylinder and depress the pedal.
4. Close the master cylinder port and bleed screw and let the pedal return.
5. Repeat steps 3 and 4 until the emerging uid is free of air.
HYDRAULIC RELEASE BEARING BLEEDING
1. Fill the master cylinder reservoir with DOT 3 or DOT 4 compatible uid.
2. Open the bleed screw for the hydraulic release bearing.
3. Take the clutch pedal to full stroke.
4. Close the bleed screw after uid stops owing out.
5. Let the pedal return to its natural position and leave it there for at least 3 seconds.
6. Repeat steps 3 through 5 until the emerging uid is free of air.
7. Do not stoke the pedal again until the pedal positive stop has been set.
Figure 2
"A"
Distance from spring ngers to housing mounting
Figure 3
"C"
Distance from engine mounting surface to top of bearing
"B"
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