5-14 RESISTORS RI-R3 MAINTENANCE.
This task covers: a. Test
Tool Kit, General Mechanics
(item 1, appendix B)
Multimeter (item 3, apendix B)
Both generator sets shut down; paragraph
Soldering Gun (item 3, apendix B)
2-5.3.3. Trailer handbrakes set, front support
leg/landing lowered, and rear leveling-support
jack lowered; paragraph 2-3.2.1. Switch box
If testing R1 or R2, step 1. must be performed.
Remove four screws (1, figure 5-20), lock washers (2), and flat washers (3) and invert relay board
Measure resistance of R1 (5) or R2 (6) for 246.5-251.5 ohms. If resistance is out of tolerance, replace
Measure resistance of R3 (11) for 2465-2515 ohms. If resistance is out of tolerance, replace resistor.
If resistors R1 and R2 are within tolerance, place relay board assembly in position and secure with flat
washers (3), lock washers (2), and screws (1).
If removing R1 or R2, step 1, must be performed.
1. Remove four screws (1), lock washers (2), and flat washers (3) and invert relay board assembly (4).
2. Tag and unsolder leads from resistor.
3. Remove two nuts (9), lock washers (8), flat washers (7), screws (10), and resistor (5,6, or 11).