5
13. Remove exhaust rocker lever mounting studs
on cylinders 2, 4, and 6.
14. Remove exhaust crossheads and replace with
CBrake by Jacobs crossheads (Fig. 3).
15. Install new exhaust rocker lever mounting bolts
(these will accept the engine brake mounting
bolts). Torque to 60 N•m [45 ft-lb].
16. Remove exhaust rocker adjusting screw lock-
nut on cylinders 2, 4, and 6. Replace locknuts
with longer lock nut. Do not tighten at this time.
17. Adjust the exhaust valve lash on cylinders 2,
4, and 6. Tighten locknut to 25 N•m [20 ft-lb].
Install spherical nut onto long lock nut and
torque to 40N•m [30 ft-lb].
NOTE: REFERENCE ENGINE MANUAL FOR IN-
STRUCTION ON SETTING EXHAUST VALVE
LASH.
18. Inspect exhaust valve lash on cylinders 2, 4,
and 6. Adjustment may have moved when
torquing the spherical nut. Readjust as neces-
sary.
19. Install six brake mounting spacer studs into
pretapped holes. Torque to 60 N•m [45 ft-lb].
Section 3: Engine
Brake Installation
Engine Brake Installation
1. Make sure the housing adjusting sleeves are
flush with the bottom of the housing or re-
cessed.
2. Apply oil to the oil supply screw o-rings and
slide housings down and into position.
3. Place 3 mounting bolts in the mounting bolt
holes on the slave piston side of the brake
housing (next to slave piston adjusting screws).
Tighten the three bolts to 7 N•m [5 ft- lb] (Fig.
5).
4. Screw down the three housing adjusting
sleeves until they just make contact with the
rocker arm pedestals.
5. Place the 3 remaining mounting bolts with
hardened washers into the adjusting sleeves
and hand tighten. Brake should be flat on
rocker arm pedestal and spacer. Torque the 6
mounting bolts to 32 N•m [23 ft-lb].
6. Install electrical harness from each engine
brake solenoid to the spacer pass-through
connector.
FIG. 5
For ISL98: Spacer Installation
1. Clean rocker housing. Apply sealant to spacer.
Place spacer on position.
2. Hand start the five spacer bolts (these will
accept the cover screws). Starting from the
center and proceeding outward on both sides
torque the bolts to 32 N•m [23 ft-lb].
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