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 TROUBLESHOOTING
TESTING AND ADJUSTMENT
Item
Problem
Item
Problem
1.
Engine Will Not Start.
15.
Oil at the Exhaust.
2.
Misfiring or Running Rough.
16.
Little or No Valve Clearance.
3.
Stall at Low rpm.
17.
Engine Has Early Wear.
4.
Sudden Changes in Engine rpm.
18.
Coolant in Lubrication Oil.
5.
Not Enough Power.
19.
Too Much Black or Gray Smoke.
6.
Too Much Vibration.
20.
Too Much White or Blue Smoke.
7.
Loud Combustion Noise.
21.
Engine Has Low Oil Pressure.
8.
Loud Noise (Clicking) From Valve Compartment.
22.
Engine Uses Too Much Lubrication Oil.
9.
Oil in Cooling System.
23.
Engine Coolant is Too Hot.
10.
Mechanical Noise (Knock) in Engine.
24.
Starting Motor Does Not Turn.
11.
Fuel Consumption Too High.
25.
Alternator Gives No Charge.
12.
Loud Noise From Valves or Valve Drive Components.
26.
Alternator Charge Rate is Low or Not Regular.
13.
Little Movement of Rocker Arm and Too Much Valve
27.
Alternator Charge Too High.
Clearance.
28.
Alternator Has Noise.
14.
Valve Spring Lock is Free.
29.
Exhaust Temperature is Too High.
Problem
Cause
Correction
1.
ENGINE
WILL
NOT
Empty Fuel Tank
Put fuel in fuel tank
START
Bad Quality Fuel
Remove the fuel from the fuel tank. Install a new fuel filter element. Put a good
grade of clean fuel in the fuel tank.
Dirty Fuel Filter
Install new fuel filter
Dirty or Broken Fuel Lines
Clean or install new fuel lines as necessary.
Linkage to Sleeve Control Shaft is
Check the operation of the shut-off solenoid and the shut-off linkage. Solenoid must
Held in Shutoff Position
pull up to compress spring for fuel turn on. Check governor linkage for free
movement. Sleeves must turn freely on pump plungers in all positions of sleeve
control shaft. The thrust collar must turn freely on the governor shaft at all positions
between shut-off and full load. If linkage does not move freely under these
conditions, clean all parts thoroughly. Inspect all parts for wear and make
replacement where needed.
Fuel Pressure is Too Low
Replace the fuel filter. Inspect the bypass valve for free movement. Install a new
bypass valve if necessary.
32
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