TM 9-2320-272-24-3
4-119. STEERING GEAR (ROSS) REPAIR (Contd)
1. Wormshaft (8) adjustment:
a. Position steering gear (1) in vise with sector shaft (4) up and pointed away from bench.
b. Set sector shaft (4) with alignment mark (5) up. This places sector shaft (4) in center of steering
gear travel.
c. Turn wormshaft adjusting screw (3) until seated against wormshaft (8).
d. Tighten adjusting screw (3) 5-10 lb-ft (7-14 Nm).
e. Back out adjusting screw (3) one turn.
2. Sector shaft (4) adjustment:
a. Position torque wrench and 12-point socket on wormshaft (8) at an angle.
b. While moving wormshaft (8) 1/4 turn each side of center, tighten sector shaft adjusting screw (7)
until torque on wormshaft (8) is 25-30 lb-in. (2.8-3.4 Nm).
c. Back out sector shaft adjusting screw (7) one turn. Note torque required to rotate wormshaft (8)
1/4 turn on each side of center of wormshaft (8). Record torque required.
d. Move sector shaft adjusting screw (7) to provide a rise of 2-6 lb-in. (0.2-0.7 Nm) at a point
45 degrees each side of center of wormshaft (8).
e. Tighten sector shaft adjusting screw jamnut (6) 45-50 lb-ft (62-68 Nm).
f. Check torque required to rotate wormshaft (8). The torque must not exceed 20 lb-in. (2.3 Nm) to
turn wormshaft (8) after jamnut (6) has been tightened. If torque exceeds 20 lb-in. (2.3 Nm),
repeat step 2.
3. Wormshaft adjusting screw (3) adjustment:
a. Using torque wrench and socket on wormshaft (8) and moving it 45 degrees each side of center,
tighten wormshaft adjusting screw (3) until torque is 10-15 lb-in (1.1-1.7 Nm) higher than
torque in step 2.
b. Tighten jamnut (2) 70-80 lb-ft (95-108 Nm).
4. Rotate wormshaft (8) 90 degrees each side of center and note torque required. If torque exceeds
35 lb-in. (4 Nm), repeat step 3.
4-638
