3-86. ENGINE RETARDER INSTALLATION (Contd)
b. Slave Piston Adjustment (Contd)
Slave piston (30)
Adjust clearance as follows:
a. Loosen locknut (6).
b. Loosen setscrew (7) several
Turn counterclockwise to loosen
until there is no pressure or tension.
c. Insert feeler gauge between
A slight drag should be felt on
slave piston (30) and crosshead.
the feeler gauge when setscrew (7)
Adjust clearance to 0.018 in.
is properly adjusted.
After slave piston adjusting screw locknut has been tightened to specified value, check
clearance with feeler gauge again. Do not overtighten adjusting screw locknut or clearance
may change and result in damage to engine.
d. Tighten locknut (6) to 40 lb-ft
e. Recheck clearance between
Refer to CAUTION before step 6d.
slave piston (30) and crosshead
Repeat steps 6a through 6d if
with feeler gauge.
any change in clearance is found.
Solenoid harness (10)
Connect spade end (6) to solenoid
valve assembly (36). Connect
receiver end (11) to terminal (14)
inside of engine brake retarder
If engine will be started after installation and adjustment of engine retarder, it will then be
necessary to bleed air from engine retarder assembly and proceed with step 14. If it will not
be started, proceed with follow-on tasks.
Engine brake retarder
When engine is installed on
dynamometer test stand, bleed
and purge air as follows:
a. Start engine and run for
b. Rev engine to 1800 rpm and
c. Push down on solenoid
armature (5) five or six times to
permit engine lubricating oil
to fill engine brake retarder
housing oil passages.
Install engine lifting brackets (TM 9-2320-273-20 or TM 9-2320-283-20).
Install rocker covers and gaskets (TM 9-2320-273-20 or TM 9-2320-283-20).
Install air aftercooler (para. 3-87).