Specifications

D-1000B Heater Operations & Maintenance
5.4.6.2 Inspection Procedures:
1. Remove the fuel pump plastic coupler (74) (see Figure 5-6).
2. Inspect the plastic coupler (74) for wear, cracks, chips or any other defects to render unserviceable condition.
3. Replace or install (if required) the plastic coupler (74) by aligning flat of shaft with tab inside the coupler.
5.4.6.3 Installation Procedures
1. Positioned fuel pump assembly behind electric motor assembly aligning tabs on the plastic coupler to the slots
inside the electric motor as shown in Figure 5-6 and Figure 5-7.
2. Using a 2.5mm Allen wrench, tighten three set screws on the fuel pump collar to secure the fuel pump to the
electric motor assembly (see Figure 5-4).
3. Using a 13mm open end wrench, connect and tighten the fuel feed hose (65) from the burner head (61) to fuel
pump (70).
4. Using a 15mm open end wrench, connect and tighten the fuel supply line (22B) from fuel filter and fuel return line
(22A) to the fuel tank at the fuel pump (70).
5. Reconnect the fuel solenoid leads.
6. Install heat shield (05).
7. Using an 8mm nut driver install and tighten six screws (79) and two sheet metal screws (78).
8. Install the top cover and four quick release pins as shown in Figure 5-1.
9. Test heater in accordance with the operations manual (see Chapter 6) and check for leaks.
Figure 5-7 - Electric Motor Internal Shaft
MAINTENANCE, and REPAIR PROCE
DURES 5-10 DHS SYSTEMS LLC
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