Tilton 52XX Hydraulic Release Bearing (98-1135) - Manual (Page 2)

Hydraulic lines and fittings
Install the two supplied union fittings and tighten. These fittings are made to seal on the tapered
section and not the threads. Do not use pipe tape or other sealants.
Install the (customer-supplied) hydraulic lines and bleed fitting assembly, routing both of the lines
clear of the exhaust system, oil lines and other heat sources.
Master cylinDer priMing
1. Fill the master cylinder with brake fluid. Use a DOT 3, DOT 4 or other non-silicone based fluid.
Avoid DOT 5 (silicone based) fluids since they are not compatible with the seals.
2. Open the bleed fitting (if equipped) at the master cylinder while the line port is closed.
3. Gently depress the clutch pedal, close the bleed screw and release the clutch pedal.
4. Repeat Steps 1 and 2 until fluid free of air bubbles emerges.
Do not stroke a Tilton master cylinder more than 1".
HyDraulic release Bearing BleeDing
1. Fill the master cylinder reservoir with DOT 3 or DOT 4 brake fluid.
2. Apply approximately 3 lbs of force on the clutch pedal. You want enough force to hold the
bearing out against the clutch diaphragm spring, but not enough to actually move the spring.
3. Open the bleed screw that is attached to the bleed line on the hydraulic release bearing.
4. Completely stroke the pedal.
5. Close the bleed screw.
6. Let the pedal return to its relaxed position and wait a few seconds.
7. Repeat Steps 2 through 6 while keeping an eye on the fluid level until all air is removed
from the system.
Note: You do not want to stroke the clutch during the bleeding process.
All you are trying to do at this point is get all of the air out of the system.
Do not stroke the clutch until the pedal stop is set!
clutcH peDal stop
A positive clutch pedal stop must be used to prevent over-stroking the
hydraulic release bearing piston and the clutch. With a Tilton 7.25" clutch and a
3/4" bore master cylinder, you will need approximately .79" of master cylinder
stroke for proper clutch release. For access reasons, in many cars it is not easy
to determine how far the master cylinder is being stroked. The method listed
below provides a very effective method for adjusting the pedal stop:
1. Lift the drive wheels off the ground and support the car on jack stands.
2. With the engine off, place the gearbox in first gear and have someone
attempt to rotate the drive wheels.
3. Depress the clutch pedal slowly until the clutch disengages and the drive
wheels can be rotated.
4. Adjust pedal stop to allow another 1/4" of pedal travel. This should provide
clean release of the clutch. Do not stroke the pedal any further than this
point throughout this procedure, otherwise you will over-stroke the clutch.
FI
RE
W
ALL
Adjustable
Pedal stop
Pedal position where
clutch breaks free.
1/4" additional travel
(exaggerated for clarity)
Pedal position where
pedal stop should be set.
Never travel clutch
pedal past this point!
Diagram 2