MerCruiser 3-Button Switch Power Trim Tilt Wire Wiring Harness Only Cord 19' [links]
See full version: Control Boxes; Steering
MerCruiser 3-Button Switch Power Trim Tilt Wire Wiring Harness Only Cord 19' [links]
MerCruiser 25884 25898 25887 Mercury Ride Guide Rack Pinion Steering Cable Helm [links]
MerCruiser 120hp140hp 165hp 9 pin 15' Extension Wire Cord harness plug Alpha One
MerCruiser 49055 20-Degree Mercury Ride Guide Rack Pinion Steering Cable Helm
MerCruiser 18' 8-Pin Wire Wiring Harness Dash to Motor Gauges No Plug End here
MerCruiser 31446 20-Degree Mercury Ride Guide Rack Pinion Steering Cable Helm
Changing a rack gaiter usually involves taking the track rod end off; they generally unscrew from the track rod. However at least one ‘end’ will normally incorporate the steering tracking adjustment; the further on the rod you fit the joint, the greater the toe-in. Therefore, to retain the tracking setting that existed before the gaiter was changed, you have to refit the track rod end in the same position. The fool-proof way of doing this is to count the number of ‘turns’ needed to remove the end and wind the new one on the same number. Some people reckon they can tell where it should be from where the clean/previously hidden threads end and the dirty exposed ones start, but I prefer to count.
This arrangement is cheaper to build. Some also say it gives a smoother action; however the rubber joint doesn’t last forever and eventually wear, tear, heat and oil contamination may take their toll. Obviously a component that provides the only link between the steering wheel and steering gear is fairly crucial from a safety point of view and it should certainly be checked at MoT time. more
However a steering rack has another big advantage over a box-based system; it’s more compact and thus a lot easier to fit into – or more accurately under – a crowded engine bay. This is particularly relevant on front-wheel drive vehicles where the extra space is taken up by the drive shafts and suspension, meaning that rack and pinion steering is usually the only possible option. more
Of course, if you’re renewing the rack, you’ll need to have the tracking reset anyway. You can buy DIY-quality kit to do this yourself if you wish; alternatively leave it to a garage/tyre depot, though you may need to supply the data. As regards lubrication, the method and type of lubricant varies from rack to rack; some require grease, some EP90 oil. Refer to your workshop manual. In all cases though, take care not to overdo it; in particular the rack should not be packed with oil in the same way as a steering joint, as the lubricant has to be free to move about to where it’s required by the action of steering. more
HOW IT WORKS
The key components within a steering rack are, simply, a rack and a pinion gear. The pinion gear turns with the steering wheel, and this causes the rack to move from side to side, creating the lateral movement that causes the steering action. Rubber gaiters at each end provide a flexible seal to keep lubricant inside the rack assembly and, more importantly, keep grit and dirt out. [links]
MAINTENANCE
The most common problem is failure of the rubber gaiters at each end of the rack. These stretch and contract with movement and eventually split. This is a MoT failure as if any dirt or grit gets in it’s likely to cause damage to the rack’s internals. Renewing the gaiter is usually straightforward – if a correct/original gaiter is no longer available universal-type gaiters are available with a range of different diameters at each end that can be cut it to the required size. [links]
Steering is the collection of components, linkages, etc. which allows any vehicle (car, motorcycle, bicycle) to follow the desired course. An exception is the case of rail transport by which rail tracks combined together with railroad switches (and also known as ‘points’ in British English) provide the steering function. The primary purpose of the steering system is to allow the driver to guide the vehicle.
Functions of Steering Gear Box : more
1. It converts the Rotary movement of the steering wheel in to the angular turning of the front wheels.
2. It also multiplies drivers efforts and give MEHANICAL ADVANTAGE. more
The steering rack is essentially the heart of the steering system. When it wears out or breaks entirely the ability to steer your vehicle is compromised. If this happens while you are driving, it can be extremely dangerous. It's for these reasons (and many more) that being alert to the warning signs of a bad or failing steering rack or gearbox can save you money, time and reduce the potential of an crash.
Today's rack and pinion steering systems are supported by a power steering unit that utilizes hydraulic pressure to allow easy and quick steering wheel handling. When the steering wheel feels tight or is harder to turn than usual, it's typically due to the steering rack or gearbox building up more heat or a loss of hydraulic pressure from the power steering unit. Either way, it's a problem that won't go away and should be inspected as soon as possible by an ASE certified mechanic. Sometimes it's as simple as adding more power steering fluid or a minor adjustment that can solve this problem and extend the lifespan of your steering rack. more
As noted above, sometimes tight steering is indicated by low power steering fluid. However, since the steering box is hydraulically powered, the fluid levels won't decrease unless there is a leak somewhere in the system. Once you start to leak power steering fluid it means there is a loose fitting, broken gasket, or other mechanical issue causing the leak that must be fixed as soon as possible. Failure to do so will cause the steering rack or gearbox to develop excess heat, potentially breaking gears and other components that could lead to a crash. more