M977 Through M985 General Operating Procedures (Cont)
k. Drive In Off-Road Conditions.
Do not move TRANSFER CASE shift lever when
vehicle is moving or when transmission is in gear.
Severe damage to drive line will result.
Before driving M984A1 Off-road, raise and hook rear
mudflaps (para 2-58b). Rear mudflaps on M984A1
can be torn off when working in off-road conditions.
Set TRANSFER CASE shift lever (1) to L (LO).
Do step (2) for Non-FHTV model vehicles.
Do step (2.1) for FHTV model vehicles.
Push in button (2) and move transmission range selector (3) to 2 or 1,
depending on ground condition (para 2-11e1).
Set transmission range selector (3.1) to appropriate setting (para
Push in PARKING BRAKE control (4).
Maximum no-load governed engine speed is
approximately 2250 rpm. Never allow engine speed to
go over this figure. Under full load, governed speed is
approximately 2100 rpm. If engine is allowed to go over
governed speeds, serious engine damage can result.
Slowly press down throttle treadle (5) until vehicle reaches desired
speed. Tachometer (6) should read 1650 to 2100.
Do not hold steering wheel at full left or full right
position for longer than 10 seconds. Power steering oil
can overheat and pump can be damaged.
Accelerate, brake, and steer as required.