Specifications

Maintenance—Every 2000 Hours
TX,85,DH2239 –19–31JUL92–1/5
MEASURE AND ADJUST ENGINE VALVE
LASH (CLEARANCE)—544G, LL, TC, 624G
1. Remove precleaner or air intake cover, hood, air
cleaner bracket with air cleaner intake manifold, and
engine crankcase vent tube.
2. Plug all openings.
3. Check crankcase ventilation tube for restriction. Clean
with solvent or diesel fuel.
4. Remove rocker arm cover.
TX,85,DH2239 –19–31JUL92–2/5
T6129AJ –UN–27OCT88
5. Install JDE-81-1 Flywheel Turning Tool (A).
6. Turn flywheel until JDE-81-4 Timing Pin (B) goes into
hole in flywheel.
7. Try to move both pushrods at number one cylinder. If
both are loose, proceed with adjustment per chart on
No. 1 TDC. If both pushrods at number six are loose,
proceed with adjustment per chart on No. 6 TDC.
TX,85,DH2239 –19–31JUL92–3/5
T6119AI –UN–13MAR89
NOTE: Valve clearance can be adjusted whether engine
is hot or cold.
8. Measure and adjust valve clearance with No. 1 piston
or No. 6 at TDC. To change piston position, pull timing
pin out of flywheel, rotate flywheel 360°, and insert
timing pin.
86–1
PN=158