DETROIT DIESEL 53
Trouble Shooting (Engine)
15.2
Chart 2
HARD STARTING
SUGGESTED REMEDY
pump or faulty installation, consult the No Fuel or
1. Refer to Items 2, 3 and 5 and perform the
Insuficient Fuel chart.
operations listed.
2. Replace the starting motor switch.
8. Check for bind in the governor-to-injector linkage.
Readjust the governor and injector controls if
3. Hand crank the engine at least one complete
necessary.
revolution. If the engine cannot be rotated a complete
revolution, internal damage is indicated and the
9. Remove the cylinder head and recondition the
engine must be disassembled to ascertain the extent of
exhaust valves.
damage and the cause.
10. Remove the air box covers and inspect the
4. Refer to Lubricating Oil Specifications in
compression rings through the ports in the cylinder
Section 13.3 for the recommended grade of oil.
liners. Overhaul the cylinder assemblies if the rings
are badly worn or broken.
5. Recharge the battery if a light load test indicates
low or no voltage. Replace the battery if it is damaged
11. To check for compression gasket leakage, remove
or will not hold a charge.
the coolant filler cap and operate the engine. A steady
flow of gases from the coolant filler indicates either a
Replace terminals that are damaged or corroded.
cylinder head gasket is damaged or the cylinder head
is cracked. Remove the cylinder head and replace the
At low ambient temperatures, use of a starting aid will
gaskets or cylinder head.
keep the battery fully charged by reducing the
cranking time.
12. Adjust the exhaust valve clearance.
6. Tighten the starter connections. Inspect the starter
13. Inspect the blower drive shaft and drive coupling.
commutator and brushes for wear. Replace the brushes
Replace damaged parts.
if badly worn and overhaul the starting motor if the
commutator is damaged.
14. Operate the starting aid according to the
instructions under Cold Weather Starting Aids.
7. To check for air leaks, flow obstruction, faulty fuel
SEC. 15.2 Page 7
November, 1973