Brake Lash - Navistar International DT 466 Diagnostic/Troubleshooting Manual

Brake Lash

• Three actuators are adjusted when piston 1 is at
Top Dead Center (TDC) compression.
• Three actuators are adjusted when piston 6 is at
Top Dead Center (TDC) compression.
Corresponding intake and exhaust valve lash should
be adjusted before rotating the crankshaft.
Figure 361 Brake lash adjustment
Figure 362 Feeler gauge between the valve
bridge and brake actuator
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
6 PERFORMANCE DIAGNOSTICS
1. Check cold brake lash with a (0.019 in) feeler
2. Once brake lash is set, tighten the locknut to
Possible Causes
•
•
•
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
gauge between the actuator and valve bridge. If
adjustment is required, loosen the locknut and
turn the actuator adjustment screw until a light
drag is felt.
27 N·m (20 lbf·ft) and remove the feeler gauge.
Recheck for light drag on feeler gauge. If drag is
too tight or loose, repeat steps 1 and 2.
Worn valve train
Worn valve seat or valve face
Worn actuator in Diamond Logic® engine brake
277