6C
P/S System Air Bleeding Procedure
Air Bleeding From System
CAUTION:
When air bleeding is not complete, it is indicated by foaming fluid on level gauge or humming noise from P/S pump.
NOTE:
Bleed air from system when P/S system has been serviced in any way other than replacement of steering gear box (e.g., disconnection of piping, replacement of P/S pump). Never operate steering system while servicing. Or Air Bleeding from gear box must be performed.
1) Jack up the front end of vehicle and apply rigid rack.
2) Fill P/S fluid reservoir with fluid up to specified level.
3) With engine running at idling speed, add fluid up to specified level.
4) When fluid stops reducing, stop engine and leave P/S system as it is for about 10 minutes.
5) After running engine at idling speed for 1 minute, stop it.
6) As a final step, check to make sure that fluid is up to specified level.
7) Check steering condition and P/S system for fluid leakage.
Air Bleeding From Gear Box
NOTE:
• When steering gear box has been replaced with a new one.
• When entry of air into hydraulic circuit of steering gear box is suspected.
1) Remove steering gear box from vehicle referring to P/S Gear Box Removal and Installation .
2) Install special tool as shown.
Special Tool
(A) : 09945–35010
1. Steering gear box 3. High pressure hose / pipe
2. Low pressure hose / pipe    
3) After running engine at idling speed for 3 – 5 seconds, stop it and add fluid up to specified level. Repeat this step a few times.
NOTE:
Don’t operate steering system for this step.
4) Set steering gear box (1) to state [A] as shown.
5) With engine running at idling speed, turn input shaft by using special tool in both directions as far as it locks till all foams are gone.
NOTE:
• Add fluid into P/S fluid reservoir whenever its level lowers while servicing.
• Turn input shaft till it locks, return it a little and turn it again in the same direction till it locks. Repeat this some times.
Special Tool
(B) : 09944–18211
6) Perform Step 5) but with steering gear box in state [B] this time and then in state [C].
NOTE:
To change of state of gear box from [A] to [B] and from [B] to [C], turn gear box in arrow direction in the figures [A] and [B].
2. Vinyl tube (See-through tube)
7) Set input shaft at neutral position (straight position).
NOTE:
As input shaft makes 4 full turns from lock to lock, neutral position is obtained by turning it till it locks and turning it back by 2 full turns.
8) Remove (special) tools and install steering gear box to vehicle and P/S hose / pipe to steering gear box referring to P/S Gear Box Removal and Installation .
NOTE:
• Don’t install pitman arm and steering lower shaft to steering gear box.Installation of these parts will cause input shaft and/or sector shaft to turn, allowing air to enter gear box.
• Plug up opening after pipe or hose disconnection.
9) Bleed air in P/S system referring to P/S System Air Bleeding Procedure .
10) Install pitman arm and steering lower shaft to steering gear box.