POWER STEERING GEAR AND LINKAGE — Adjustment

ST-25prose procedure

POWER STEERING GEAR AND LINKAGE (Model PR24SC and PR26SC)

Adjust pinion rotating torque as follows.

1
Set gears to Neutral without fluid in the gear.
SST089B
2
Coat the adjusting screw with locking sealant and screw it in.
3
Lightly tighten lock nut.
4
Tighten adjusting screw to a torque of 4.9 to 5.9 N·m (50 to 60 kg·cm, 43 to 50 in·lb).
5
Loosen adjusting screw, then retighten it to 0.05 to 0.20 N·m (0.5 to 2 kg·cm, 0.43 to 1.74 in·lb).
6
Move rack over its entire stroke several times.
7
Measure pinion rotating torque within the range of 180° from neutral position. Stop the gear at the point of maximum torque.
SST072B
8
Loosen adjusting screw, then tighten it to 4.9 to 5.9 N·m (50 to 60 kg·cm, 43 to 52 in·lb).
9
Loosen adjusting screw by 40° to 60°.
10
Prevent adjusting screw from turning, and tighten lock nut to specified torque.
SST657A
11
Check steering gear for rack sliding frictional force.
If sliding frictional force is out of specification, repeat the adjustment procedure, starting from No. 4.
After the readjustment, if sliding force is still out of specification, steering gear is damaged.
SST090B
12
Measure pinion rotating torque within the range of ±100° from the neutral point.
SST072B

Specification	Value
Step 4 — Adjusting screw initial	≈48 - 58N·m
Step 5 — Adjusting screw retighten	≈0.5 - 2.0N·m
Step 8 — Adjusting screw final	≈48 - 58N·m
Step 9 — Adjusting screw back-off	40 - 60degrees
Step 11 — Rack sliding force around neutral (±5.5 mm / ±0.217 in)	122.6 - 166.7N (12.5 - 17 kg, 27.6 - 37.5 lb)
Step 11 — Rack sliding force except neutral	122.6 - 186.3N (12.5 - 19 kg, 27.6 - 41.9 lb)
Step 12 — Average rotating torque ±100°[(Max + Min) × 0.5].	≈7.8 - 13N·m
Step 12 — Maximum torque increment ±100°	—N·m
Step 12 — Maximum rotating torque outside ±100°	≈19N·m
Step 12 — Maximum torque increment outside ±100°	—N·m

Step 4 — Adjusting screw initial

48 - 58N·m

Step 5 — Adjusting screw retighten

0.5 - 2.0N·m

Step 8 — Adjusting screw final

48 - 58N·m

Step 9 — Adjusting screw back-off

40 - 60degrees

Step 11 — Rack sliding force around neutral (±5.5 mm / ±0.217 in)

122.6 - 166.7N (12.5 - 17 kg, 27.6 - 37.5 lb)

Step 11 — Rack sliding force except neutral

122.6 - 186.3N (12.5 - 19 kg, 27.6 - 41.9 lb)

Step 12 — Average rotating torque ±100°[(Max + Min) × 0.5].

7.8 - 13N·m

Step 12 — Maximum torque increment ±100°

—N·m

Step 12 — Maximum rotating torque outside ±100°

19N·m

Step 12 — Maximum torque increment outside ±100°

—N·m