POTENTIAL CAUSE
1. Shift lever not entirely in Park (or Neutral
position).
2. Insufficient battery voltage due to:
– Low charge
– Corroded connections
– Damaged Cables or solenoid wires
3. Blown fuse.
4. Park/Neutral position switch problem.
5. Starter or solenoid problem.
6. Hydrostatic lock. Combustion chambers filled with fuel, or coolant due to faulty injectors, or blown head gasket. (Remove glow plugs, crank engine and note fluid coming out of plug holes).
7. Flywheel ring gear teeth or starter Bendix damaged.
CORRECTION
1. Check and correct linkage adjustment as needed.
2. Check batteries and cable connections. Charge low batteries and check generator and belt. Replace failed battery(s). Clean corrosion from cables connections. Replace or repair cables or terminals as needed.
3. Check fuse condition at fuse boxes. If blown fuse is found, check circuit for shorts, grounds.
4. Test switch continuity with ohmmeter. Replace switch if open/shorted.
5. Check for bad or loose connections at starter and solenoid. If OK, note if starter surges when current is applied. Problem may be with Bendix or armature.
6. Test and replace injectors that are stuck open.
Replace blown head gasket or replace head if cracked.
7. Remove transmission access cover and inspect ring gear and bendix. Replace flywheel or starter Bendix as necessary.
