ARMY TM 9-6115-60412
NAVY NAVFAC P-8-633-12
Set a multimeter to RX1 scale and check for continuity across terminals 1 and 2. Resistance reading
should be less than one ohm.
Reset multimeter to RX 1000. While observing the multimeter indication, slowly rotate knob in a
clockwise direction. Meter resistance indication must increase smoothly, with no erratic jumps at
any points in travel.
When knob (wiper arm terminal 2) is in the fully clockwise stop position, total resistance indication
shall be 500 ±50 ohms.
Reconnect wire removed from terminal 3.
The rheostat is not repairable. Replace the rheostat if it does not meet the specifications above.
Replace. See Figure 5-2.
Tag and disconnect wiring from VOLT ADJ rheostat R101R (11), if necessary.
Remove knob (10) from front panel.
Loosen and remove rheostat locking nut at front of panel and remove the rheostat assembly from the
Install VOLT ADJ rheostat R101 R (11 ) at rear of panel and secure in position with locking nut so
that when the knob (10) is attached with the shaft rotated fully counterclockwise, the arrow is at the 9
Secure knob (10).
Connect wires as tagged. Remove and discard tags.
Close remote control panel and secure by locking three oval studs at top of the panel.
PARALLEL SWITCH S6R (12. Figure 5-2). The PARALLEL SWITCH S6R is a two-section, or deck, rotary
switch with handle spring return to normal-vertical position following a command operation. The switch is used to
select either single unit or parallel generator set operation.
Switch wiring position numbers are translated as follows. the first digit defines the
section, or deck, In relation to the handle end, the second digit is a specific terminal on
that deck. For example position 23 is located on the second deck, the terminal is
Shut down the generator set See Figure 2-23.
Open the RCM panel by unlocking three oval studs across the top of the panel.
Tag and disconnect wiring from PARALLEL SWITCH S6R (12) terminals.
Set a multimeter to RX1 scale and test for contact continuity in the switch positions specified in the
chart in Figure 4-71. Meter should indicate zero ohms at all points marked In the chart.
Multimeter should indicate Infinite ohms at all blank contacts in the chart.
Rotate handle to the SINGLE position and release handle. Handle should return to the normal-
vertical position automatically.
Repeat step f, above, with handle rotated to the PARALLEL position.
Replace PARALLEL SWITCH S6R (12) if it falls to pass testing as described above.
Connect wires to PARALLEL SWITCH S6R as tagged Remove and discard tags.