Specifications

D-1000B Heater Operations & Maintenance
71A
71B
71
70
72
73
65
74
19
22A Return to Tank
22B Supply from Fuel Filter
22
A
Fuel Return
22B Fuel Supply
Figure 5-6 – Fuel Pump
5.4.6 Removal, Inspection and Installation of Electric Motor / Fuel Pump Coupling
5.4.6.1 Removal Procedures;
1. Disconnect power cord from power source and allow heater to cool.
2. Remove four quick release pins and remove top cover (see Figure 5-1).
3. Using a 8mm nut driver, remove the upper heat shield (05) by removing six screws (79) and two sheet metal
screws (78); remove heat shield and set aside.
4. Disconnect the fuel solenoid leads.
5. Using a 15mm open end wrench, loosen and disconnect at fuel pump (70) the fuel supply line (22B) from the fuel
filter and fuel return line (22A) to the fuel tank (see Figure 5-6).
6. Using a 13mm open end wrench, loosen and disconnect at the fuel pump the fuel feed hose (65) to burner head
(61).
7. Using a 2.5mm Allen wrench, loosen (DO NOT REMOVE) three set screws on the fuel pump collar (see Figure 5-
4); remove fuel pump from electric motor assembly.
MAINTENANCE, and REPAIR PROCE
DURES 5-9 DHS SYSTEMS LLC
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