TB 9-4920-361-24
(7) On model 476-854, set ENGINE OIL TEMP NO. 1 CAL/NOR switch to NOR.
Multimeter will indicate between 170 Ω and 190 Ω. Adjust variable fully ccw. Multimeter
will indicate between 73.6 Ω and 77.6 Ω.
(8) Disconnect leads from connector No. 1 pins g (HI) and h (LO) and connect to
connector No. 2 pins g (HI) and h (LO).
(9) Repeat (3) through (7) above, except use engine oil temp No. 2 controls.
b. Adjustments. No adjustments can be made.
13. Xmsn Oil Temp
a. Performance Check
(1) Connect multimeter Input (2 Wire) HI and LO to connector No. 2 pins J (HI)
and K (LO) and connect multimeter Ω Sense (4 wire) HI and LO to connector No. 2 pins J
(HI) and K (LO). In addition, connect multimeter Guard to connector No. 2 pin K (LO).
(2) Set multimeter for 4-wire ohms measurement mode.
(3) Set XMSN OIL TEMP CAL/NOR switch to CAL and HI/LO switch to HI.
On model 476-854, adjust XMSN OIL TEMP CAL/NOR variable control fully cw.
(4) Measure resistance. Multimeter will indicate between 224 Ω (234.04 Ω) and
236 Ω (234.96 Ω).
(5) Set XMSN OIL TEMP HI/LO switch to LO. Multimeter will indicate between
79 Ω (86.7 Ω) and 91 Ω (87.3 Ω).
(6) On model 476-853, set XMSN OIL TEMP CAL/NOR switch to NOR and adjust
variable control from fully ccw to fully cw. Multimeter indication will vary from 88 Ω or
less to 270 Ω or more.
(7) On model 476-854, set XMSN OIL TEMP CAL/NOR switch to NOR.
Multimeter will indicate between 250 Ω and 290 Ω. Adjust variable control fully ccw.
Multimeter will indicate between 84 Ω and 90 Ω.
b. Adjustments. No adjustments can be made.
14. Rotor Speed
a. Performance Check
(1) Connect frequency counter to connector No. 1 pins A (HI) and B (LO).
(2) Set ROTOR SPEED CAL/NOR switch to CAL and HI/LO switch to HI. On
model 476-854, adjust ROTOR SPEED CAL/NOR variable control fully cw.
(3) Set ON-OFF-SIM ONLY switch to SIM ONLY.
(4) Measure frequency. Frequency counter will indicate between 11,190 (11,245.1) and
11,302 (11,247.1) Hz.
(5) Set ROTOR SPEED HI/LO switch to LO. Frequency counter will indicate 0.
(Disregard residual noise count).
10 CHANGE 2
