Steering Gear: Testing and Inspection

INSPECTION

BASIC INSPECTION

1) Clean all the disassembled parts, and check for wear, damage or any other faults, then repair or replace as necessary.
2) When disassembling, check the inside of gearbox for water. If any water is found, carefully check the boot for damage, input shaft dust seal, adjusting screw and boot clips for poor sealing. If faulty, replace with new parts.





SERVICE LIMIT

Make a measurements as follows. If it exceeds the specified service limits, adjust or replace.

NOTE:
When making a measurement, vise the gearbox using ST. Never vise the gearbox by inserting aluminum plates etc. between vise and gearbox.

ST1 926200000 STAND
ST2 34199AG000 BOSS D

Rack shaft sliding resistance:
Limit
314 N (32 kgf, 71 lbf) or less

Left/right differential of sliding resistance:
20% or less








RACK SHAFT PLAY IN THE RADIAL DIRECTION

Right-turn steering:

Limit
Direction white arrows "from/to" black arrows "from/to"
0.4 mm (0.016 in) or less

Condition
L: 5 mm (0.20 in)
P: 98 N (10 kgf, 22 lbf)





Left-turn steering:
Limit
Direction black arrows "from/to"
0.6 mm (0.024 in) or less
Direction white arrows "from/to"
0.4 mm (0.016 in) or less





INPUT SHAFT PLAY

In radial direction:
Service limit
0.18 mm (0.0071 in) or less

Condition
P: 98 N (10 kgf, 22 lbf)





In axial direction:
Service limit
0.27 mm (0.0106 in) or less

Condition
P: 20 - 49 N (2 - 5 kgf, 4 - 11 lbf)





TURNING RESISTANCE OF GEARBOX

Using the ST, measure the gearbox turning resistance.
ST 34099PA100 SPANNER

Service limit:
Maximum allowable resistance:
13 N (1.3 kgf, 2.9 lbf) or less
Difference between right and left turning resistance:
20% or less





OIL LEAKAGE





1) Lift up the vehicle.
2) If a fluid leak is found, clean the fluid completely from the suspect area, and turn the steering wheel 30 to 40 times to the left and right from lock to lock, with the engine running, and check again for leaks immediately, and also after a few hours have passed.
3) Cause and solution for oil leakage from "a"
The oil seal is damaged. Replace the valve assembly or oil seal with a new part.
4) Cause and measure for oil leakage from "b". The torsion bar O-ring is damaged. Replace the valve assembly with a new part.
5) Cause and measure for oil leakage from "c". The oil seal is damaged. Replace the oil seal with a new part.
6) Cause and solution for oil leakage from "d". The pipe is damaged. Replace the faulty pipe or O-ring.