TM-9-2320-273-10

TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; OPERATOR’S MANUAL

DECEMBER 2012

TM-9-2320-273-10 - Page 161 of 452

COLD WEATHER STARTING BELOW 32º F (0º C) - CONTINUED

NOTE

The DIFF LOCK OUT indicator will remain illuminated if

the differential control switch is in LOCK position. For all

normal driving conditions the differentials should be

unlocked. If the differential control switch is in the LOCK

position, perform step 8 for M915 and M915A1 vehicles or

step 9 for M916 through M920 vehicles.

When the differential control switch is moved to the

UNLOCK position, the red DIFF LOCK OUT indicator may

remain illuminated until the vehicle is put in motion.

8. Move differential control switch (Figure 5, Item 2) to UNLOCK position

(WP 0005).

9. Move differential control switch (Figure 5, Item 2) to UNLOCK position

(WP 0005), and once engine is started and DIFF LOCK OUT indicator

(Figure 5, Item 1) goes off, move differential control switch (Figure 5, Item 2) to

OFF position.

Figure 5. Differential Control Switch and Engine Start Button.

1

2

M915 AND M915A1 M916 THROUGH M920

2

TM 9-2320-273-10

0009

0009-5