Tilton 77-Series (98-1234) - Manual

Description
The TB&C 77-Series master cylinders offer the latest in racing master cylinder technol-
ogy in very lightweight and compact design. The rear spherical bearing mount and
one-piece piston/pushrod eliminate side thrust into the master cylinder bore, providing
consistent and repeatable braking. 77-Series master cylinders are designed specifically
for use with 900-Series pedal assemblies or balance bar P/N 72-280.
Master cylinDer Fittings
The inlet port is a 9/16-18 Thread (–6AN) designed for a crush washer seal. Use Tilton P/N
77-015 to adapt to a –4AN straight Male tapered seat fitting. Alternately, you may use a
banjo bolt and swivel fitting by ordering Goodridge P/N 776-04-M14 (Fitting), 77S-06
(Banjo bolt), and two CW901-6 (crush washers). If you choose alternate fittings, the maxi-
mum thread engagement into the master cylinder is .375".
Note: –4 inlet hose should be used to ensure adequate fluid flow.
Note: The outlet port is -3AN Female tapered seat.
altering cutoFF port travel
As delivered, the Tilton 77-Series master cylinder has been blueprinted for a cutoff port
travel within the range of .030" to .050". The cutoff port travel is set by the thickness of
the large copper crush washer between the master cylinder body and the hex end cap
(visible from the outside). The actual cutoff port travel and the thickness of the crush
washer is noted on a label on the bottom of each individual master cylinder.
You may alter the master cylinder cutoff port travel by changing the thickness of the
crush washer. Increasing crush washer thickness increases the cutoff port travel an
equal amount. Reducing the crush washer thickness reduces cutoff port travel an equal
amount. Five different thickness crush washers in .010" increments are available from Til-
ton. Use the table to choose the appropriate shim for the master cylinder bore diameter.
Shim
Thickness
SHIM P/N FOR MASTER CYLINDER SIZE
5/8", 7/10",
3/4" Bore
13/16", 7/8"
Bore
15/16",1"
Bore
.020 in 77-412-20 77-414-20 77-416-20
.030 in 77-412-30 77-414-30 77-416-30
.040 in 77-412-40 77-414-40 77-416-40
.050 in 77-412-50 77-414-50 77-416-50
.060 in 77-412-60 77-414-60 77-416-60
77 Series Master Cylinders
INSTALLATION INSTRUCTIONS 98
-12
34
3/8-24 UNF
2.84 2.82
1.81 (1 BORE)
1.57 (5/8 BORE)
1.20
O .312
AN-3 FEMALE AN-6 FEMALE