Page 42 of 105
REAR AXLE
Four bar rear axle
The four bar rear axle comprises:
- two arms connected by an "L" section. This assembly (1) cannot be dismantled. Any deformation would
mean its complete replacement.
- two anti-roll bars (3),
- two suspension bars (4),
- a shackle (2) connecting the bars.
The assembly is connected to the body by two bearings mounted on rubber bushes.
NOTE : Never take the weight of the vehicle using a jack on the "L" section (1) to lift the vehicle.
33
PRN3300
33-16
Page 43 of 105
REAR AXLE
Four bar rear axle
SPECIAL TOOLING REQUIRED
Emb. 880 Inertia extractor
TIGHTENING TORQUES (in daN.m)
Upper shock absorber mounting 8.5
Lower shock absorber mounting 11.5
Wheel bolts 9
REMOVAL
Remove:
- the wheels,
- the shock absorbers,
- the suspension bar plugs.
Remove using tool Emb. 880 :
- the two suspension bars,
- the two anti-roll bars, retaining the central
shackle.
Clean and lubricate the bar splines using
MOLYKOTE BR2.
REFITTING
The anti-roll bars cannot be removed from the
vehicle when the shock absorber replacement tool
is in position. Because of this, and to make it
easier to refit the shackle, a wooden block must
be made according to the diagram below.
Fit:
- the shackle on the block (locally made) in the
centre of the rear axle assembly,
33
13135R
Dimensions in mm and degrees ( ° ).
33-17
Page 44 of 105
REAR AXLE
Four bar rear axle
- the first anti-roll bar, ensuring the angle of
the block is observed, and the bar is inserted
freely.
33
13134S
- the second anti-roll bar, ensuring it engages
freely.
In order to position the suspension arm so that the
bar may be correctly positioned, a tool must be lo-
cally made.
ANut, diameter 14 mm
BNut, diameter 12 mm
CThreaded rod, diameter 12 mm - length 660
mm
DBracket from flat sheet 30 x 5 mm
E 12 x 60 mm bolt, cut to a length of 20 mm
FWeld
75505-1R1
88637R2
Preset the tool to obtain dimension "X".
X = 430 mm
Fit the tool in place of the shock absorber.
Refit:
- the bar plugs,
- the shock absorbers,
- the wheels.
Put the vehicle on its wheels and measure the un-
derbody heights ( see section "values and set-
tings" ).
33-18
Page 45 of 105
REAR AXLE
Four bar rear axle
33
Check and if necessary adjust:
- the braking compensator,
- the headlights.
REMINDER
When adjusting for a wheel height difference
between the right and left hand sides, always
make the adjustment on the anti-roll bars.
The adjustment for a difference in dimension " X"
between the right and left hand sides should
always be made on the suspension bars.
33-19
Page 46 of 105
REAR AXLE
Suspension arm bearings
This operation is carried out after removing the
rear arms and the suspension bars.
REMOVAL
Totally immerse the bearing in brake fluid to
soften the rubber bush.
Using a two or three claw extractor, remove the
external part of the bearing by tearing off the
rubber.
Saw through the inner ring taking care not to
scratch in the tube of the arm.
REFITTING
The bearing is fitted in the arm on the press,
ensuring the correct alignment is observed and
the clearance between the bearing and the arm is
correct.
Alignment
Observe dimension "X" between the bearing
pressure face and the stub axle shaft:
X = 156 mm ± 3.5
TUBULAR REAR
AXLE
33
DI3303
85909S
75362S
DI3310
33-20
Page 47 of 105
REAR AXLE
Suspension arm bearings
Clearance
In this position, press on the bearing until the
dimension between the bearing centres is :
Y = 1164 mm ± 1
Fit the arm to the vehicle.
TUBULAR REAR
AXLE
33
DI3311
33-21
Page 48 of 105
REAR AXLE
Suspension arm bearings
This operation is carried out after removing the
rear axle assembly and the suspension bars.
REMOVAL
Weld a spacer (example : nut) in the central tube
of the bush.
Remove the bush - bearing assembly on the press.
REFITTING
The bearing is fitted in the arm, ensuring the cor-
rect alignment is observed and the clearance bet-
ween the bearing and the arm is correct.
Alignment
Observe dimension "X" between the bearing
pressure face and the stub axle shaft
X = 124 ± 3.5 mm
Clearance
In this position, press on the bearing until the
dimension between the bearing centres is :
Y = 1164 ± 1 mm
Fit the rear axle assembly to the vehicle and refit
the suspension bars (see corresponding section).
FOUR BAR REAR
AXLE
33
90241GDI3312
DI3313
33-22
Page 78 of 105

96118R
MECHANICAL ELEMENT CONTROLS
Brake pipes
37
These vehicles have brake pipes without a copper seal. The seal is by contact "at the bottom of the cone" of
the shoulder (Y) on the pipe.
X = 1.5
Z= 1.3
TIGHTENING TORQUES (in daN.m)
PRECAUTIONS TO BE TAKEN WHEN REMOVING - REFITTING A BRAKE CYLINDER OR A BRAKE PIPE.
For safety reasons and to ensure that the brake pipe is not twisted and is not liable to touch a suspension
component the following order of operations must be observed:
Remove the hose from the caliper and if necessary
remove the caliper.
REMOVAL
Slacken the union (1) (pipe wrench) between the
rigid pipe and the hose (2) until the spring (3)
becomes slack which releases the hose from the
splines (4).
85536R
REFITTING
Fit the caliper to the brake and screw the hose
onto it, then torque tighten to
1.5 daN.m.
The brake pipes are fitted when the axle assembly
is in position:
• Wheels suspended (suspension in place)
• Axle assembly aligned (wheels straight)
Position the female end of the hose on the
retaining bracket (5), without twisting it and
check that the end piece (4) fits freely into the
splines of the bracket, then fit:
- the spring (3),
- the rigid pipe to the hose, checking that the
hose does not turn when the assembly is
screwed together.
Torque tighten the union.
Bleed the brake circuit.
37-10