A propeller shaft, or propshaft, connects
the rear axle to the gearbox on front-engined rear-wheel-drive cars.At each end
of the propshaft there is a universal joint (UJ), which allows the rear axle to
move up and down in relation to the gearbox without bending or snapping the
shaft.nqk auto oil seals Excellent
quality.
Some propshafts also have a universal coupling fitted at the centre.A universal joint consists of a cross-shaped ‘spider’ with needle roller bearings held on its four arms by caps and circlips. The yoked ends of two shafts have lugs which engage with the spider arms and can pivot on the roller bearings.auto oil seals.
In most modern cars the joints are sealed for life and cannot be lubricated. In older cars, they can be dismantled from the propshaft, checked and lubricated or replaced.If the propshaft joints on your car have grease nipples, check with the manufacturer’s service schedule for greasing intervals.
auto oil seals. The main drawback with many current car models is that the universal joints cannot normally be separated from the propshaft. When the joints wear, the propshaft must be renewed. A worn joint causes the propshaft to vibrate. As wear increases, vibration worsens.Another sign of wear is a clonk when you accelerate or decelerate, or a regular knock when the car is moving.nqk auto oil seals Excellent quality.
A sure sign of something breaking up inside the bearings of a joint is rust-coloured dust around the spider. Fit a new joint or shaft immediately.To check for wear when no dust is evident, grip one side of the joint firmly and try to turn the other side against holding pressure. valve oil seals.There should be no play in the joint at all.Slip a screwdriver between the yoke and the spider and lever it to test for free play.
Slip a screwdriver between the yoke and the spider and lever it to test for free play.Make another check by inserting a large screwdriver between the yoke and the spider and levering it to see if there is any play. If you feel any play, fit a new joint or propshaft.auto oil seals.The symptoms of a worn joint — the clonks or apparent play — are very similar to those for excessive backlash in the crown wheel and pinion.Be sure that any play you do feel is in the joint, and not the rear axle.Some specialist engineering companies will machine out the yokes of modern propshafts to accept joints that can be fitted in the same way as on earlier designs.If a sealed joint fails,viton oil seals, it is worth seeking out such a company and comparing the cost of their services against that of a new propshaft.Generally, if one joint on the prop-shaft is worn, the others will also need renewal, and it is best to do them all at the same time.nqk auto oil seals Excellent quality.
Failure of the needle rollers is the commonest cause of wear in this type of universal joint, usually due to lack of lubrication. Before checking the joint, make sure that any movement is not due to slackness in the bolts holding it to its mating flange. Then check the joint for both radial and lateral play.
Grip the flange tightly with one hand and try to turn the propshaft with the other; look for movement at the spider ends, under the circlips. With a strong screwdriver or steel bar, lever the joint laterally. again looking for movement at the spider ends.nqk auto oil seals Excellent quality.
Some propshafts also have a universal coupling fitted at the centre.A universal joint consists of a cross-shaped ‘spider’ with needle roller bearings held on its four arms by caps and circlips. The yoked ends of two shafts have lugs which engage with the spider arms and can pivot on the roller bearings.auto oil seals.
In most modern cars the joints are sealed for life and cannot be lubricated. In older cars, they can be dismantled from the propshaft, checked and lubricated or replaced.If the propshaft joints on your car have grease nipples, check with the manufacturer’s service schedule for greasing intervals.
auto oil seals. The main drawback with many current car models is that the universal joints cannot normally be separated from the propshaft. When the joints wear, the propshaft must be renewed. A worn joint causes the propshaft to vibrate. As wear increases, vibration worsens.Another sign of wear is a clonk when you accelerate or decelerate, or a regular knock when the car is moving.nqk auto oil seals Excellent quality.
A sure sign of something breaking up inside the bearings of a joint is rust-coloured dust around the spider. Fit a new joint or shaft immediately.To check for wear when no dust is evident, grip one side of the joint firmly and try to turn the other side against holding pressure. valve oil seals.There should be no play in the joint at all.Slip a screwdriver between the yoke and the spider and lever it to test for free play.
Slip a screwdriver between the yoke and the spider and lever it to test for free play.Make another check by inserting a large screwdriver between the yoke and the spider and levering it to see if there is any play. If you feel any play, fit a new joint or propshaft.auto oil seals.The symptoms of a worn joint — the clonks or apparent play — are very similar to those for excessive backlash in the crown wheel and pinion.Be sure that any play you do feel is in the joint, and not the rear axle.Some specialist engineering companies will machine out the yokes of modern propshafts to accept joints that can be fitted in the same way as on earlier designs.If a sealed joint fails,viton oil seals, it is worth seeking out such a company and comparing the cost of their services against that of a new propshaft.Generally, if one joint on the prop-shaft is worn, the others will also need renewal, and it is best to do them all at the same time.nqk auto oil seals Excellent quality.
Failure of the needle rollers is the commonest cause of wear in this type of universal joint, usually due to lack of lubrication. Before checking the joint, make sure that any movement is not due to slackness in the bolts holding it to its mating flange. Then check the joint for both radial and lateral play.
Grip the flange tightly with one hand and try to turn the propshaft with the other; look for movement at the spider ends, under the circlips. With a strong screwdriver or steel bar, lever the joint laterally. again looking for movement at the spider ends.nqk auto oil seals Excellent quality.
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