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PLATE 2389472 - Caterpillar

2389472 PLATE Caterpillar parts PLATE
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Caterpillar 2389472 PLATE

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Gas under pressure. Rapid discharge from disconnecting or disassembly could cause personal injury or death. See service manual before relieving pressure or charging.
Personal injury or death can occur if steering is lost completely during operation.Do not continue to operate the machine using the secondary steering.If the secondary steering activates during operation, the machine must be safely shut down immediately. Inspect the machine and correct the condition which made the use of the secondary steering necessary.
Personal injury or death can occur if personnel are trapped between the wheel and the frame.The steering system is hydraulically controlled and wheels can crush personnel during movement.Use caution when working between the wheels and the frame. If the wheels must be turned, ensure that all personnel are clear of the machine before any movement.
This machine is equipped with a secondary steering system that will operate in either forward or reverse direction of machine travel. If the power source for the normal steering system fails, the VIMS warning system will alert the operator with a category 3 warning. A category 3 warning states that the machine must be safely shut down immediately.The steering system accumulators automatically provide a limited amount of stored hydraulic pressure for secondary steering capability. The stored hydraulic pressure is exhausted by a small amount of steering system oil flow that keeps the oil warm and by steering wheel action by the operator. The stored hydraulic pressure will be exhausted faster as the steering wheel action by the operator is used to a greater magnitude, duration, or frequency.
Illustration 1 g01727539
There are two steering accumulators on the machine. Steering accumulators (1) is located on the outside right frame rail near the front of the machine.
Illustration 2 g01727541
Perform the following field test in order to verify that the secondary steering system is functional:
Empty the truck body and park the machine on a level surface. Place the transmission control in the NEUTRAL position and engage the parking brake.
When the engine is stopped with the engine start switch, check the steering hydraulic oil level. Maintain the oil to the full mark in upper sight gauge (2) .
After engine start-up, check the oil level.
If the oil level registers at the full mark in lower sight gauge (3) , the accumulators are properly charged.
If the oil level registers below the full mark in the lower sight gauge, check accumulator charge before proceeding to the next step. Refer to System Operation, Testing and Adjusting, SENR1452, " 793C Off-Highway Truck Steering System" or consult your Caterpillar dealer.
Turn the front wheels to the straight ahead position.
Chock the rear wheels and release the parking brake.
Illustration 3 g01195257
The engine shutdown switch is located on the front bumper.
Stop the engine with ground level shutdown switch (4) . This permits the accumulators to stay charged in order to provide stored energy for the secondary steering system when the engine is stopped.
Visually confirm the following:
Verify that the front wheels turn left as the steering wheel is turned left.
Verify that the front wheels turn right as the steering wheel

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