LATCH AS-DOOR 8Y8320 - Caterpillar

Table 1
Required Tools
Part Number Part Description Qty
6V-3079 Hose As 1
6V-4143 Couplers 2
8T-0859 Pressure Gauge (0 TO 25,000-kPa (0 to 3,600-psi)) 1
Personal injury or death can result from machine articulation or movement. Machine frames can move and a person can be crushed. Connect the steering frame lock between the front and rear frames before working on the machine.Before operating the machine, place the steering frame lock in the stored position.Failure to place the steering frame lock into the stored position before operating can result in loss of steering.
Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue, causing serious injury, and possible death.Always use a board or cardboard when checking for a leak.Do not check for pin hole leaks in pump or motor hoses during a steer stall condition. If fluid is injected into your skin, it must be treated by a doctor familiar with this type of injury immediately.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g01138873
Steering frame lock installed
(1) Steering frame lock
Install steering frame lock (1) so that the machine can not turn.
Illustration 2 g01024151
Steering control valve
(2) Pressure tap
(3) Pressure adjusting screw
Remove the protective cover from pressure tap (2). Connect a hose assembly with an 8T-0859 Pressure Gauge to pressure tap (2).
Start the engine. Operate the engine at the high idle rpm with the transmission in neutral.
Turn the machine against the steering frame lock. This will cause the relief valve to open.
Observe the pressure gauge. The pressure reading on the gauge should be 17225 340 kPa (2500 50 psi). Check the reading on the gauge while attempting to turn the machine in both directions.
Illustration 3 g00871392
Steering control valve
(3) Pressure adjusting screw
(4) Locknut
If the pressure is not the same in both directions, there is a problem in the shuttle (ball resolver) of the steering control valve. If the pressure is the same in both directions, but the pressure is not correct, adjust the spring tension of the relief valve in the steering control valve group. To adjust the relief valve, perform the following procedure:
Loosen locknut (4). Turn adjusting screw (3) clockwise to increase the pressure setting and counterclockwise to decrease the pressure setting. Tighten the locknut (4).
After the correct pressure setting is obtained, stop the engine. Remove the pressure gauge from the pressure tap. Place the protective cover on the pressure tap.
Remove the steering frame lock.