Have an authorized diesel repair station perform any
For diagnostics and tests of electronic control systems,
refer to the following: For older Bosch ECU controls, see
CTM68. For newer John Deere ECU controls, see
IMPORTANT: Never steam clean or pour cold water
on an injection pump while pump is
running, or while it is still warm. To do
so may cause seizure of pump parts.
1. Clean injection lines and area around the injection
pump with cleaning solvent or a steam cleaner.
2. Remove timing hole plug (A).
Injection Pump Timing Access Hole
3. Rotate engine flywheel (in normal running direction)
with JDG820 Flywheel Turning Tool until No. 1 piston
JDE81-4 Timing Pin should enter hole in flywheel.
4. Timing marks on injection pump drive hub and fixed
timing pointer should be aligned.
Continued on next page