B
144
Repair and Service Manual
FAULT TESTING
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
653045
POWERTRAIN PERFORMANCE
CONDITION
POSSIBLE CAUSE
CORRECTION
STARTER DOES NOT
TURN
Weak or bad battery
Charge or replace as necessary
Terminals are loose or corroded
Clean and tighten
Poor wiring connections
Repair or replace wire and/or connections
Faulty ignition switch
Repair or replace wire switch, and/or connections
Blown fuses
Investigate cause and replace fuses
Solenoid faulty
If no audible ‘click’ is heard, check power and ground. Replace
solenoid if power and ground is good
Starter terminals are loose or cor-
roded
Tighten or clean
Leads are broken or faulty ground
Repair or replace
Bad relay
If no audible click is heard, replace engine start relay
STARTER TURNS
SLOWLY
Terminals are loose or corroded
Re-tighten or clean
Weak battery
Charge battery
Leads are nearly broken or connec-
tions are faulty
Check for any defect of leads at bend or joint. Replace leads
or repair connections
Mechanical problem inside
starter
Replace starter.
Internal engine damage
Inspect and repair
Crankcase over filled with oil
Drain and fill to recommended level with approved oil
STARTER ROTATES BUT
VEHICLE WILL NOT
START OR HARD TO
START
Weak battery
Recharge or replace as necessary
Corroded or loose battery connec-
tions
Clean and tighten battery connections.
Apply a coat of battery protectorate to
terminals
Check for adequate fuel level
Fill with correct grade gasoline. See GENERAL SPECIFICA-
TIONS.
No spark at spark plugs. Broken or
disconnected spark plug wiring
Check and replace if required. See GENERAL SPECIFICA-
TIONS.
Spark plugs fouled
Clean or replace
Incorrect spark plug
Check that spark plugs are the correct type. See GENERAL
SPECIFICATIONS.
Fuel pump faulty
Repair or replace
Fuel line clogged or clamp loose
Clean or replace if required
Cracked or broken fuel line
Replace with new hose
Clogged fuel filter
Check and replace if required
Engine flooded
Clean/or replace spark plugs
Engine fuel starved
Check fuel line
Clogged air filter
Wash or replace as required
Plugged muffler or pipe
Repair or replace
POOR LOW SPEED
PERFORMANCE
Plugged gas tank vent
Clean or repair
Fuel pump faulty
Replace
Insufficient fuel level
Add fuel
Spark plug fouled
Clean or replace
Fig. 2 Powertrain Performance Troubleshooting
Property of American Airlines
Содержание HAULER 1200
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