S&S Cycle Hydraulic Tappet PN 33-5342 - Manual (Page 2)

INTRODUCTION
S&S ® tappets PN 33-5342 feature several significant
improvements. Closer operating tolerances, redesigned
roller-axle assembly and precisely metered oil supply make
these tappets especially well-suited for high performance
engines which utilize increased cam lift/duration and valve
spring pressure and operate at high RPM.
Tappet 33-5342 can be identified by six small dimples in
pushrod cup, large O.D. oil hole, special tru-arc style
hydraulic plunger retaining ring and S&S logo with part
number on side of tappet body. See Picture 1.
Installation and adjustment procedures are similar to
previous S&S tappets with exceptions listed below:
● 33-5342 tappets are suitable for virtually all
applications without S&S Hydraulic Lifter Limited
Travel Kit recommended with previous lifters. If
customer elects to install HL2T kit, PN 33-5338
designed for 1984-’85 Harley-Davidson
® Evolution ®
engine tappets must be used.
NOTE: If HL
2
T kit is installed, pushrods must be adjusted
according to S&S Hydraulic Lifter Limited Travel Kit
Instruction 51-1039.
● Because of reduced operating clearances, bleed-down
time of 33-5342 tappet may be somewhat longer than
with other tappets. Bleed-down averages 15-20
minutes with temperature 65°F or above but on some
test engines has taken as long as 30 minutes. Lower
temperatures will increase bleed-down time.
NOTE: See pushrod manufacturer’s instructions for correct
pushrod installation and adjustment procedures.
Rotating or operating engine with insufficient pushrod
freeplay can cause extensive damage not covered
under warranty.
ADDITIONAL INFORMATION
Even though 33-5342 tappets may retain a small quantity
of fluid from pre-testing at factory, new tappets should be
considered dry, meaning that bleed-down time will be
substantially less than with subsequent adjustments after
tappets have filled with engine oil.
Because of extremely close tolerances, S&S recommends
that these tappets not be disassembled unless absolutely
necessary. Even minute contamination can damage tappet
and interfere with proper operation. If tappet must be
disassembled, components should be meticulously cleaned
with solvent and compressed air, moving parts given a thin
coat of clean 20W50 engine oil and excess removed with
clean, lint-free cloth prior to reassembly.
NOTE: If tappets are disassembled, care must be taken not
to mix internal parts from different tappets as components
are specially fit for optimum performance.
Mixing parts will alter operating tolerances which may
result in loss of hydraulic function and damage to other
engine components. In no case should pushrods be
adjusted and engine turned over until tappets have been
completely bled down and sufficient freeplay between
tappets, pushrods, and rocker arms exists. Pushrods must
rotate freely between thumb and forefinger.
Compressed air and particles dislodged by compressed
air can be hazardous, especially to eyes. Always wear
protective clothing when using compressed air and
direct air stream away from self and others nearby.
2
Picture 1
Tappet 33-5342 (right) is easily distinguished
from other tappets. See introduction.
CAUTION
CAUTION
WARNING