COUPLING-EXHAUST 1678260 - Caterpillar

Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
Introduction
This procedure is utilized to adjust the angles of the wheels so that wheels are parallel to each other. The purpose of this adjustment is so the machine tracks straight and true when traveling along a straight and level road. If the machine is out of alignment, the alignment can cause steering or tracking problems.Required Tools
Table 1
Required Tools
Item Qty Part Number Description
T1 1 Square
T2 1 FT-2294 Alignment Bar
T3 1 Protractor
T4 1 FT-2295 Wrench ( 75 mm)
T5 1 FT-2296 Wrench ( 41 mm)
1 Caliper Test Preparation
Clear all personnel from the machine and from the area around the machine.
Start the engine.
Illustration 1 g02449876
Engine speed dial
Set the engine speed dial at "10".
Lower the left console.
Position the machine on level ground. Check the visibility and adjust the mirrors for the best vision close to the machine.
Fully depress the service brake pedal until the service brake pedal locks mechanically.
Lower the rail axles in order that all tires are fully off the ground, and shunt the road mode.
Fully extend the bucket cylinder and place the bucket on the ground.
Stop the engine.
Release the pressure in the hydraulic system.Note: Refer to Testing and Adjusting, "System Pressure - Release".
Raise the left console.
Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
Use jack stands to support the machine and remove the wheels from the front axle. The front drive shaft must be removed from the machine.Note: Refer to Disassembly and Assembly, "Power Train" for further information.
Illustration 2 g03738944
Center position of steering cylinder piston (typical example)
(1) Steering cylinder
(2) Rail axle pad
(3) Rod
(4) Mounting face of drive shaft
Center the piston of steering cylinder (1).Note: The steering cylinder moves easily when the wheels are supported above the ground. Make sure that the piston is centered during the procedure.
Measure the length of rod (3) on both sides of the cylinder.Note: The piston is centered when both measurements are equal.
Illustration 3 g02416399
(2) Rail axle pad
(4) Mounting face of drive shaft
(T1) Square
(5) Locknut
(T2) FT-2294 Alignment bar
Install alignment bar (T2) on Rail axle pad (2) on the front axle. Use square (T1) to ensure that alignment bar (T2) is perpendicular to the mounting face drive shaft (4) of front axle. Tighten the bolts on Rail axle pad (2).Test Procedure
Illustration 4 g02416402
(T1) Square
(T2) FT-2294 Alignment bar
(T3) Protractor
(6) Hub face
Place square (T1) on hub face (6).
Use protractor (T3) to measure the angle between square (T1) and alignment bar (T2). The angle should be 90 degrees.Adjustment Procedure
If the wheel alignment needs adjustment, loosen locknut tie rod (5)