Table 1. Troubleshooting Procedures--Continued.
TEST OR INSPECTION
ENGINE EXHAUST IS
Check for restricted air
If air passages are restricted,
BLACK OR FUEL
passages or red band in
clear restricted passages (refer
air restriction indicator.
to WP 0107 00) and/or replace
air filter element (refer to WP
0105 00). Verify problem is
solved. If air passages were
clear, go to step 2.
Check for dirty,
If fuel is dirty, drain and remove
contaminated, or wrong
fuel tank (refer to WP 0102 00)
grade of fuel.
and fuel lines and replace and
refill tank with clean fuel.
Replace fuel filter (refer to WP
0103 00). Verify problem is
solved. If fuel was okay, go to
Check tachometer to see if If engine is not operating at
engine is operating at
proper rpm, adjust throttle cable
(refer to WP 0108 00). Verify
problem is solved. If engine is
operating at proper rpm, notify
Direct Support maintenance that
further troubleshooting is
Listen for clicking noise at
If clicking noise is heard, replace
LAMP WILL NOT LIGHT
engine control box when
indicator lamp (refer to WP 0114
preheat indicator lamp
00). Verify problem is solved. If
switch is moved to ON
noise is not heard, go to step 2.
Check for continuity at
If continuity is not present in
switch, replace switch (refer to
WP 0114 00). Verify problem is
solved. If continuity is present, go
to step 3.