S&S Cycle Hydraulic Lifter Limited Travel Kit Fits All Harley-Davidson Evolution Engines - Manual (Page 2)

The S&S ® HL
2
T Kit is designed to limit the travel of the hydraulic
lifter making it impossible for the lifter to collapse. Stronger
valve springs are often used to avoid valve float at high rpm. The
HL
2
T kit prevents high valve spring pressure from collapsing
lifters. With the HL
2
T Kit installed, stock hydraulic lifters work
like solid lifters at high rpm, while retaining normal hydraulic
function for minimal noise and maintenance under normal
conditions. Another advantage of the HL
2
T kit is that if a valve is
held open when the engine is not running, valve spring pressure
will not cause lifters to bleed down and collapse. Collapsed lifters
can cause hard starting and excessive valve train noise when
engine is restarted. Adjustable pushrods must be used with the
HL
2
T Kit.
Please read the instructions to familiarize yourself with the
installation procedure before starting.
NOTE - S&S Kit #33-5338 for 1984 & 1985 tappets, have smaller
diameter hydraulic plunger bodies which measure about .612”.
S&S Kit #33-5339 for 1986 to present tappets, have larger
diameter hydraulic plunger bodies which measure about .655”.
An early S&S kit must not be used in a late set of tappets.
Installation procedure is the same for either kit.
Installation
1. Remove tappet assemblies from engine being sure that each
one is kept with it’s original tappet block.
NOTE: This procedure is the preferred method of
installation. However, kit can be installed without removing
lifters from engine.
2. Remove hydraulic piston retaining wire clip from one
assembly at a time.
Be careful not to bend wire clip during disassembly.
3. Completely disassemble tappet removing all parts.
4. Thoroughly clean all parts including tappet body. Remove
any oil which might prevent hydraulic unit from fully
collapsing during adjustment.
5. Insert one spacer from S&S HL
2
T kit in tappet body.
6. Reassemble tappet in reverse order making sure original
parts are returned to their original positions. See Picture 1.
7. Replace wire retaining clip in tappet body.
8. Put tappet back in original tappet block.
9. Repeat Steps 2 through 8 for three remaining tappets.
10. Reassemble engine with modified tappets.
11. Adjust pushrods.
NOTE - In all cases engine must be cold and lifter must be at
lowest point of travel for pushrod adjustment
To prevent accidents, remove ground cable from battery.
A. Remove spark plugs.
B. Bring piston to TDC on compression stroke in cylinder to
be adjusted. Normally both tappets will be at their
lowest point of travel.
C. Extend pushrod adjustment, collapsing lifter until piston
assembly is in contact with HL
2
T spacer and pushrod is
tight. If tappets contain oil, as when pushrods are
readjusted after engine has been run, or if all oil was not
removed during installation, extend pushrod
adjustment until valve is open (about five additional
turns of adjusting screw). Allow 5 minutes for hydraulic
unit to bleed down. If pushrod can be turned with
fingers after bleeding down, lifter is not completely
collapsed, and this step must be repeated.
NOTE - perform this operation on one cylinder at a time. Do not
turn engine until pushrod adjustment is complete.
Turning engine while valve is held off the seat could result in
valve to valve or valve to piston contact and serious valve
train damage.
D. Loosen pushrod adjustment until pushrod can be
rotated with the fingers with slight drag.
NOTE - Shortening adjuster an additional six flats or full turn
from zero lash often results in quieter pushrod operation. This
provides additional travel for the hydraulic piston assembly,
which can improve the ability of the hydraulic unit to maintain
zero lash under normal operating conditions.
E. Tighten lock nut.
F. Follow the same procedure for all four push rods.
G. Recheck pushrod adjustment after a few hundred miles.
NOTES
●
It is a good idea to recheck pushrod adjustment in a new
engine as valve train may tighten up due to gasket
compression and valve seat wear.
● Upon initial start up after modification, HL
2
T equipped
lifters may be somewhat noisy for 10-20 miles. If lifters are
still noisy after 20 miles it is recommended that pushrods be
adjusted 1⁄2 turn looser. See step D.
2
CAUTION
CAUTION
CAUTION
Picture 1
S&S ® HL
2
T Spacer
The above picture shows the order in which the parts are installed
in the tappet.