User Manual

200 SETUP AND ADJUSTMENTS
Page 7-9
Slave Piston, Inlet Valve and
Exhaust Valve Lash Adjustments
Make the following adjustments with the engine
shut down. Coolant temperature must be below
100!F (38!C) to ensure proper adjustment.
On mechanically governed engines, before
barring engine for any reason, secure injection
pump stop lever in STOP position.
Do not rotate the engine crankshaft backward
when using the hub damper bolt. This might
change the torque.
1. Using engine barring socket J 38587,
manually rotate engine in normal rotation
direction.
2. Rotate until pointer in flywheel housing
aligns with the mark for valves 1 and 6 on
the flywheel and the No. 1 piston on the
compression stroke (or until the pointer
marked VALVE aligns with the TC mark on
the vibration damper, if equipped). This
provides the 30 degrees after TDC
relationship for valve lash adjustment
necessary with the E7 valve design.
Inlet Valve Adjustment
Inlet valve lash clearance is 0.016 inch
(0.406 mm).
1. Place a 0.016-inch (0.406 mm) thickness
gauge between the rocker arm and yoke.
2. Turn adjusting screw until a light drag is felt
on the thickness gauge.
3. After adjustment is complete, hold screw (to
keep from turning) and tighten locknut.
Torque locknut to 40 lb-ft (54 N•m) using
torque wrench J 24407 or equivalent.
4. After tightening locknut, recheck valve lash
clearance. Readjust as necessary.
Exhaust Valve Adjustment
Exhaust valve lash clearance is 0.024 inch
(0.610 mm) or 0.028 inch (0.711 mm) for
V-MAC II or mechanically governed engines
equipped with camshafts effective April 1996.
1. Place the appropriate thickness gauge
between the rocker arm and yoke.
Exhaust valve lash clearance is 0.028 inch
(0.711 mm) for V-MAC II or mechanically
governed engines equipped with the new cam
effective April 1996. Check the engine
identification plate for the proper setting. Refer to
Figure 7-10.
Figure 7-10 — Typical Engine Identification Plate
2. Turn adjusting screw until a light drag is felt
on the thickness gauge.
3. After adjustment is complete, hold screw (to
keep from turning) and tighten locknut.
Torque locknut to 40 lb-ft (54 N•m) using
torque wrench J 24407 or equivalent.
4. After tightening locknut, recheck valve lash
clearance. Readjust as necessary.
5-101.bk Page 9 Friday, March 17, 2006 11:05 AM