REPAIR INSTRUCTIONS, PART 3
Page 453
Brake Lash Adjustment (J-Tech™ Brake
Engines)
The engine brake lash specification is based on
the reset screw part number. All ASET™ engines
utilize reset screw part No. 032053A, which
requires a 0.021-inch (0.533 mm) lash
specification. Adjust the engine brake using the
following procedure:
1. If not previously done, use a 3/4-inch wrench
to loosen the slave piston adjusting screw
(reset screw) jam nut. Back-off the adjusting
screw until the slave piston seats at the top
of its bore.
2. Place the appropriate 0.021-inch
(0.533 mm) thickness gauge between the
slave piston stem and the top of the actuator
pin in the yoke adjusting screw.
3. Turn the slave piston adjusting screw to set
the brake lash.
4. Tighten the jam nut to specification, 25 lb-ft
(34 N폷m).
DO NOT overtighten the slave piston adjusting
screw jam nut. To do so will cause malfunction of
this screw in performing the brake reset function
and possibly result in reset screw breakage.
559
Figure 559 — J-Tech™ Exhaust Valve Rocker Arm and Yoke
5-111.bk Page 453 Monday, July 10, 2006 2:26 PM
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