Bump checking is by means of a rubber abutment mounted on the axle casing.
REAR SPRING
To remove
Jack up the car and support it by means of chassis stands or suitable blocks of wood placed under the chassis frame just forward of the front eyes of the springs.
Remove the road wheel on that side of the car from which the spring is to be removed.
Clean the projecting threads of the "U" bolts, dampers, and mounting bolts, using wire paraffin or penetrating oil.
Remove shock absorber.
Remove Nyloc securing nuts and washers from ‘ U’ bolts. Jack up rear axle until it is parted from the spring and support it with suitable blocks of wood.
Remove ‘U’ bolts.
Tap out lower shackle pin and shakeproof washer after removing nut with washer, and lower rear end of spring to floor.
Remove the front pivot pin in a similar manner to the lower shackle pin.
The spring is now free to be taken away.
To refit
Refitting is a direct reversal of the preceding operation. The final tightening of the spring " U’ bolts, shackle assemblies and pivot pins should be carried out after the removal of the jacks and stands, the car standing unladen on the road wheels.
This ensures that the spring eyes are not subject to excessive twist when in the bump or rebound position. Tighten the "U" bolt nuts to the figures given In General Data.
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To dismantle
Remove spring- (See preceding operation).
Before dismantling mark one end of each leaf with a centre punch. This ensures that the leaves are replaced in the position they occupied prior to dismantling. Remove the bundle clips. To do this first remove the bolts and carefully open out each clip a sufficient amount to enable the clip to be removed from the spring. Do not damage or lose the rubber packing.
Grip the spring securely in a vice, holding it by bottom and top leaves.
Unscrew dowel bolt and replace with a suitable length of M.S. rod of same diameter as the dowel bolt. Release vice and leaves will separate.
Remove thrust buttons.
Examination
Clean the spring leaves thoroughly using paraffin. Check thrust buttons for excessive wear and, if necessary, replace with new ones.
The spring leaves should be examined for cracks, parti-cularly if one of them is fractured.
A crack will often show due to exudation of paraffin along the line of the crack.
All faulty leaves should be replaced by new ones.
The "setting up" of spring leaves is not recommended -and In the case of a weak spring a new or factory reconditioned assembly should be fitted.
To rebuild
Before rebuilding the spring the leaves should be thoroughly lubricated with graphite grease. Rebuilding is the reversal of the dismantling instructions, but alignment of the leaves will be greatly facilitated if a length of steel rod of suitable diameter is inserted through the dowel bolt hole, otherwise damage to the threads .of the dowel bolt may occur.
When the leaves have been fully pressed home the rod should be removed, the dowel bolt fitted, and the nut tightened. Carefully refit the bundle clips together with the rubber packing. The clamp bolt should not be over-tightened as damage to the rubber packing and distortion of the clip may result.
Before refitting the spring to the chassis, check that the leaves are lying flush on each other.
Bushes may be pressed out of the spring or frame for renewal purposes.
The use of a suitable withdrawal tool is recommended.
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