D-1000B Heater
Operations & Maintenance
Handle
Filter Paper Slot
Knurled Knob
Sampling Tube
Filter Paper
Figure 6-1 - Smoke Tester
Table 6-1 - Smoke Spot
SMOKE SPOT COLOR
CAUSE
Light Gray Smoke
Good – no adjustment required
Yellow or Blue Smoke
Contaminated or Bad Fuel
White Smoke
Excessive Air Flow; No or Low Fuel Pressure, Low Fuel
Black Smoke
(Excessive) Fuel Pressure too High or Restrictive Air Flow (Lack of Air)
6.4
Fuel Pressure Test
1. Refer to Section 5.4.1 to gain internal access to the Fuel Pump.
2. Remove six screws (79) and remove the upper heat shield (05).
3. Using a 7mm Allen wrench, remove screw plug labeled “P” on the side of the fuel pump (70).
4. Attach a M10 MNPT elbow into labeled “P” port on the side of the fuel pump (70) as shown in Figure 6-2.
5. Attach hose from the Pressure Gauge to the quick disconnect end of elbow.
6. Push down on the black tab and insert hose; pull on hose to ensure that it is properly seated.
7. Turn heater on; normal operating pressure is 170 psi, verify the pressure gauge reads 170 psi.
8. If necessary fuel pressure may be adjusted.
9. Using a 7mm Allen wrench, adjust the “V” labeled screw plug clockwise to increase the fuel pressure or
counter-clockwise to decrease the fuel pressure. (See Figure 6-2).
TEST PROCEDURES
6-2
DHS SYSTEMS LLC
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