Power Steering - Diagnosis and Service Updates
83renault0312E107
DECEMBER 1983
RENAULT 18i AND FUEGO MODELS
POWER STEERING Attention: Workshop, Parts Department.
DIAGNOSIS AND SERVICE UPDATES
Contents
1. DIAGNOSIS
2. STEERING RACK AND PINION REMOVAL/INSTALLATION
3. PLUNGER ADJUSTMENT
4. ROTARY VALVE SEAL AND BEARING REPLACEMENT
5. POWER STEERING PUMP PULLEY REPLACEMENT
PRESSURE TEST DIAGNOSIS:
1. DIAGNOSIS
Pressure Testing The System
Connect pressure gauge Fre. 214-04 to the high pressure hose as follows:
1. Disconnect the-high pressure hose from the pump.
2. Install adapter Dir. 803 in the pump fitting and reattach the high pressure hose to the adapter.
3. Connect pressure gauge Fre. 214-04 to the adapter.
Pressure Test Procedure
NOTE: Be sure power steering fluid level and pump belt tension are correct before pressure testing.
^ Start and run the engine until it warms up.
^ With the engine running at idle speed, place steering wheel in straight ahead position and note gauge reading. Pressure should be at least 5 bars (72 psi) but not over 7 bars (102 psi).
^ Turn the steering wheel to a full left-turn position (against stop) and note gauge reading. Pressure should be at least 50 bars (725 psi) but not over 65 bars (943 psi). Pressure should also not differ from side-to-side by more than 5 bars (72 psi) and gauge needle should not fluctuate.
CAUTION: Do not hold the steering wheel in a full-turn position for more than 5 seconds as pump damage could occur.
STEERING GEAR OIL LEAK DIAGNOSIS:
FIGURE 1:
Steering Gear Oil Leak Diagnosis
2. STEERING RACK AND PINION REMOVAL/INSTALLATION
When removing the steering rack and pinion on models with air conditioning, it is necessary to remove the receiver-dryer attaching screws. This allows the A/C hoses to be lifted high enough for the steering rack and pinion to pass underneath during removal. Add this information to the steering rack and pinion removal procedure on page G-39 of the M.R. 220 manual and page G-40 of the M.R. 238 manual.
After steering rack installation, be sure to bleed the power steering system and check toe out. In addition, also check steering box height setting on Fuego models. Add this information to the steering rack and pinion installation procedure on page G-40 of the M.R. 220 manual and page G-41 of the M.R. 238 manual.
3. PLUNGER ADJUSTMENT
Tighten the plunger adjusting nut to 10 N-m +/- 2 N-m (8 ft.lbs. +/- 1 ft.lbs.) torque.
NOTE: Plunger adjustment must be performed with the steering rack mounted in the vehicle and with the engine stopped (no pump pressure during adjustment).
Record the adjusting nut torque and plunger adjustment information on page G-41 of the M.R. 220 manual and page G-42 of the M.R. 238 manual.
4. ROTARY VALVE SEAL AND BEARING REPLACEMENT
Disassembly
1. Remove the rotary valve housing-to-steering gear bolts and remove the valve and housing.
FIGURE 2:
2. Remove snap rings 1 and 2 (Fig. 2).
3. Tap rotary valve 7 out the bottom of the housing with a brass of fiber faced mallet.
CAUTION: Do not force the valve out. The valve seal rings could be damaged.
4. Remove seals 3 and 4.
FIGURE 3:
5. Remove bearing 5 and seal 6. Use tool T.Ar. 65 to remove the bearing and seal (Fig. 3).
Cleaning/Inspection
Clean and dry the housing and valve with clean solvent and compressed air.
Inspect the valve assembly. Replace the valve if the pinion teeth or bearing surfaces are damaged or if the valve seals are cut, cracked, or torn. Polish the housing bore with crocus cloth to remove any light corrosion or minor surface irregularities.
FIGURE 2:
Assembly
1. Coat valve surfaces A and B with Molycote 33 medium grease (Fig. 2).
2. Install seal 6 and bearing 5.
3. Lubricate the valve seal rings and housing bore with power steering fluid and install the valve in the housing.
4. Install seals 3 and 4 and snap rings 1 and 2.
Record the rotary valve seal and bearing replacement procedure on page G-42 of the M.R. 220 and M.R. 238 manuals.
5. POWER STEERING PUMP PULLEY REPLACEMENT
FIGURE 4:
1. Remove the pulley with tool Mot. 49 (Fig. 4).
FIGURE 5:
2. Press the replacement pulley onto the pump shaft as follows (Fig 5.).
a. Start the pulley onto the shaft.
b. Thread an 8-inch length of 3/8-16 threaded rod into the pump shaft.
c. Place 3/4-1/2 inch drive socket over the threaded rod and onto the pulley.
d. Place a 7/16, then a 3/8 flat washer over the rod and on top of the 3/4 socket.
e. Thread a 3/8-16 hex nut onto the rod. Align the 3/4 socket on the pulley and tighten the nut to keep the socket in position.
f. Install two more 3/8-16 hex nuts onto the rod. Run the nuts about a half inch down from the upper end of the rod and tighten them against one another securely. These will serve as jam nuts.
g. Put a wrench on the two jam nuts to keep the threaded rod from turning and tighten the nut on top of the socket to press the pulley onto the shaft.
NOTE: Press the pulley onto the pump shaft until the end of the shaft is flush with or about 1/16-inch above the pulley boss.
Record the pump pulley replacement procedure on page G-54 of the M.R. 220 manual and page G-50 of the M.R. 238 manual.
Filing Instructions
File this I.S. Note in the M.R. 171 binder.