Testing and Adjusting

Usage:

Troubleshooting

Machine Preparation for Troubleshooting

SMCS Code: 4300-035

When you are analyzing a hydraulic system for poor performance, remember that correct oil flow and correct oil pressure are necessary for correct operation. Oil flow is a function of the pump output. The pump output is a function of engine speed. A restriction to the flow of oil causes oil pressure.

For any test to the steering hydraulic system, the hydraulic oil must be at the normal operating temperature. To increase the oil temperature, start the engine. Run the engine at high idle. Move the tilt control lever to the TILT BACK position. The oil is at normal operating temperature when the hydraulic oil temperature indicator is between the first mark and the second mark.

Before any tests are performed, visually inspect the complete steering system for oil leaks and for damaged parts. For some of the tests, a magnet and a measuring rule (inches or millimeters) may be used.

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Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine.

To prevent possible injury, perform the procedure that follows before testing and adjusting the steering system.

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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 and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.

Always use a board or cardboard when checking for a leak.

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NOTICE

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 fluids according to local regulations and mandates.

1. Move the machine to a smooth, horizontal location that is away from operating machines and away from personnel.

NOTE: Permit only one operator on the machine. Keep all other personnel away from the machine or in the operator's sight.

2. Put the transmission control in the NEUTRAL position and any speed position. Engage the primary steering/transmission lock lever (STIC steer machines) or the transmission neutral lock (wheel steer machines).

3. Engage the parking brake. Place wheel blocks in front of the wheels and behind the wheels.

4. Lower the bucket or the attachments to the ground.

5. Install the steering frame lock pin.

6. Stop the engine.

7. Move the hydraulic control lever several times through the full range of travel. This will relieve any pressure that may be present in the implement hydraulic system.

8. Move the STIC steering control several times in both directions to release the pressure in the steering system.

9. Depress the brake pedal at least eighty times to release any pressure in the brake accumulators.

10. Depress the breaker relief valve on the hydraulic tank in order to release the hydraulic oil pressure.

11. The pressure in the hydraulic system has been released. Lines and components can be removed.

Visual Inspection

SMCS Code: 4300-035

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Personal injury or death can result from machine articulation or movement.
Machine frames can move and a person can be crushed.

Install the steering frame lock pin in the bores of the front and rear frames before working on the machine.

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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 and cause 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 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

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NOTICE

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 fluids according to local regulations and mandates.

Visual checks and measurements are the first step when troubleshooting a possible problem. Then perform the operation checks and last the instrument tests. Lower the bucket to the ground and stop the engine. Depress the hydraulic tank vacuum breaker/relief valve to release pressure in the hydraulic tank.

Before any operation checks are made to the steering system, visually inspect the complete system as follows:

1. Check the hydraulic tank oil level.

2. Look for air in the oil that is in the hydraulic tank. Perform this immediately after the machine is stopped and pressure relieved. Use a clear bottle or container to obtain a sample of the oil. Look for air bubbles in the oil that is in the bottle.

3. Check all oil lines, hoses and connections for damage or leaks.

4. Check for restrictions of flow; like sharp bends, clamps that are not installed correctly and physical damage to hoses and lines.

5. Remove the filter elements and look for particles removed from the oil by the filter element. A magnet will separate ferrous particles from nonferrous particles (piston rings, O-ring seals, etc).

6. Check for damage to components.

Steering System Troubleshooting

SMCS Code: 4300-035

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Personal injury or death can result from machine articulation or movement.
Machine frames can move and a person can be crushed.

Install the steering frame lock pin in the bores of the front and rear frames before working on the machine.

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Always use a board or cardboard when checking for a leak.

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NOTICE

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 fluids according to local regulations and mandates.

Performance tests of the steering system can be used for a diagnosis of poor performance and for finding the source of oil leakage inside the hydraulic system.

This section provides probable causes to a known problem. Since there may be several probable causes, specific inspections or specific instrument tests may be recommended. These inspections and tests will help to identify the cause that is most probable.

NOTE: Make sure that you use hydraulic oil with the correct viscosity for the ambient temperature and for the operating conditions. To determine the correct oil viscosity, see the reference that follows.

Reference: For additional information about the various lubricant viscosities for your machine, refer to the section "Lubricant Viscosities" in the appropriate Operation and Maintenance Manual for your machine.

Trouble Shooting Problem List

1. The machine turns slowly when the steering control is moved.

2. The steering control attempts to turn the machine when the machine is in a full turn.

3. The machine does not turn smoothly.

4. Machine turns too slow in both directions.

5. Machine turns too slow in one direction.

6. Machine turns correctly when moving, but is slow in both directions when the machine turns against a load (high resistance).

7. Machine turns correctly when moving, but is slow in one direction when the machine turns against a load (high resistance).

8. Machine does not turn when the steering control is moved.

9. The machine turns without moving the steering control.

10. Machine turns too fast to make small steering corrections when the machine moves at fast speeds.

11. The pump makes a noise and the steering cylinder rod does not move smoothly.

12. Steering wheel is hard to turn.

13. Steering wheel is hard to turn when steering quickly away from a full turn.

14. Steering wheel can be turned when the machine is at full turn.

NOTE: The following information is for both STIC and Wheel Steer machines. When applicable, Wheel Steer information will be listed with alpha characters A, B, etc.

Problem 1: The machine turns slowly when the steering control is moved.

Probable causes:

1. The oil is too cold.

2. There is a restriction in the pilot lines of the pilot valve.

3. The pilot lines to the pilot valve are not connected to the correct ports.

4. Steering pump pressure is low.

A. Restriction in steering metering pump pilot lines.

B. Pilot lines to steering metering pump are not connected to proper ports.

C. Restriction across ball check valve at steering metering pump supply port in steering control valve.

D. Bolts are too tight for metering section of the steering metering pump.

Timing of the Metering Pump Drive
(1) Pin. (2) Internal pump gear.

E. Timing of steering metering pump drive is not correct. Pin (1) must align with valley (2) of the star gear.

Problem 2: The steering control attempts to turn the machine when the machine is in a full turn.

Probable causes:

1. The adjustment of the striker for the neutralizer valve is not correct.

2. The relief valve opens before the striker moves the neutralizer valve stem.

Problem 3: The machine does not turn smoothly.

Probable causes:

1. The control valve spool does not move freely.

A. Steering metering pump supply line has been installed in the field test port (in the steering valve body) instead of its correct location.

Problem 4: Machine turns too slow in both directions.

Probable causes:

1. There is not enough flow from the primary steering pump section.

2. The control valve spool does not move all the way.

3. Springs for the flow control valve are not adjusted correctly.

Problem 5: Machine turns too slow in one direction.

Probable causes:

1. There is a faulty seal and/or seat in the shuttle valve.

2. Flow balance adjustment of main control spool is not correct.

Reference: Refer to Testing and Adjusting, "Steering Time - Check and Adjust" for more information.

Problem 6: Machine turns correctly when moving, but is slow in both directions when the machine turns against a load (high resistance).

Probable causes:

1. Oil is leaking past the relief valve seat or seals.

2. The control valve spool does not fit correctly in the bore.

3. Oil is leaking past both seats of the shuttle valve.

Problem 7: Machine turns correctly when moving, but is slow in one direction when the machine turns against a load (high resistance).

Probable causes:

1. Slow right turn: Leakage past upper ball resolver (shuttle valve) seat or seal.

2. Slow left turn: Leakage past lower ball resolver (shuttle valve) seat or seal.

Problem 8: Machine does not turn when the steering control is moved.

Probable causes:

1. The control valve spool will not move from the HOLD position.

2. Oil is leaking past the relief valve seat or seals.

3. A neutralizer valve stem does not return to the open position.

NOTE: Some steering "slip" is normal.

Reference: Refer to Testing and Adjusting, "Steering Slip (Wheel Steer) - Check" for more information.

Problem 9: The machine turns without moving the steering control.

Probable causes:

1. The control valve spool will not return correctly to the HOLD position.

2. The mounting bolts for the steering control valve are too tight.

3. The bolts are too tight for the end covers of the steering control valve.

4. Manufacturing tolerances for the control valve spool do not permit the spool to return to the HOLD position.

NOTE: This may be corrected by turning the spool in the steering control valve around in its bore (turn end for end). To do this, the spring, retainer, and shims must be installed on the opposite end of the spool. An adjustment may be necessary for the steering times.

A. Steering wheel turns without operator turning it.

a. Foreign material causes sleeve valves in hand metering unit to stick.

b. Steering metering pump centering (leaf) springs are broken or damaged.

Problem 10: Machine turns too fast to make small steering corrections when the machine moves at fast speeds.

Probable causes:

1. Flow control valve adjustment is not correct.

Reference: Refer to Testing and Adjusting, "Steering Time - Check and Adjust" for more information.

2. The control valve spool does not move freely.

3. Metering orifices on the control valve spool are filled with foreign material or were not drilled correctly.

Problem 11: The pump makes a noise and the steering cylinder rod does not move smoothly.

Probable causes:

1. There is air in the steering hydraulic circuit.

2. The pump has too much wear.

3. There is a loose connection of the oil line on the inlet side of the pump.

4. The viscosity of the oil is incorrect.

5. The relief valve opens at low oil pressure.

6. The oil level in the tank is low.

Problem 12: Steering wheel is hard to turn.

Probable causes:

A. Oil is cold.

B. Restriction in steering metering pump pilot lines.

C. Pilot lines to steering metering pump are not connected to proper ports.

D. Steering pump pressure is low.

E. Bolts are too tight for metering section of steering metering pump.

Problem 13: Steering wheel is hard to turn when steering quickly away from a full turn.

Probable causes:

A. Not enough clearance between ball check and plug assembly in neutralizer valve.

Problem 14: Steering wheel can be turned when the machine is at full turn.

Probable causes:

A. Adjustment of striker (stud assembly) for neutralizer valve is not correct.

B. Seat for the neutralizer ball check has a defect.

C. Relief valve opens before striker moves the neutralizer valve stem.

Steering Pump Flow - Test

SMCS Code: 5073-032-ON; 5073-032-TB

Reference: For additional information on the Specifications for the hydraulic pump, refer to Service Manual Module for Specifications for the machine that is being serviced.

This test is designed to determine whether a pump is operating within design parameters. Presently, only a bench test is available for this purpose. This test should be performed only if all cylinder cycle times are too slow.

For any pump test, the pump flow at 690 kPa (100 psi) will be larger than the flow at 6900 kPa (1000 psi) if the pump is operating at the same rpm. The pump flow is measured in L/min (US gpm).

The difference between the pump flow of two operating pressures is the flow loss.

NOTE: The values in the examples are not set values for any specific pump or for any specific pump condition. See the Specification for the pump flow of a new pump at 690 kPa (100 psi) and at 6900 kPa (1000 psi).

Table 1

Table 2

FLow loss that is expressed as a percentage of pump flow is used as a measure of pump performance.

Table 3

Table 4

Machine Test

Install a flow meter. Run the engine at high idle. Measure the pump flow at 690 kPa (100 psi) and at 6900 kPa (1000 psi). Use these values in the formula in Table 5.

Table 5

Bench Test

If the test bench can be run at 6900 kPa (1000 psi) and at full pump rpm, use the formula in Table 5 to determine the percent of flow loss.

If the test bench cannot be run at 6900 kPa (1000 psi) or at full pump rpm, run the pump shaft at 1000 rpm. Measure the pump flow at 690 kPa (100 psi) and at 6900 kPa (1000 psi). Use these values in the top portion of the formula in Table 6. For the bottom part of the formula, run the pump shaft at 2000 rpm. Measure the pump flow at 690 kPa (100 psi).

Table 6

Steering System Pressure - Test

SMCS Code: 4300-032-PX

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Personal injury or death can result from machine articulation or movement.
Machine frames can move and a person can be crushed.

Install the steering frame lock pin in the bores of the front and rear frames before working on the machine.

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Always use a board or cardboard when checking for a leak.

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NOTICE

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 fluids according to local regulations and mandates.

Steering Frame Lock Pin Installed
(1) Steering frame lock pin.

1. Install steering frame lock pin (1) so the machine can not turn.

Steering Control Valve
(2) Pressure adjusting screw. (3) Pressure test point.

2. Attach the correct hose and a pressure gauge (0 to 28 000 kPa or 0 to 4000 psi) to pressure test point (3).

3. Start the engine and operate it at high idle.

4. Move the steering control in either direction until the relief valve opens. Note the indication on the gauge. The correct relief pressure setting is 17 235 ± 345 kPa (2500 ± 50 psi).

Steering Control Valve
(2) Pressure adjusting screw. (4) Locknut.

5. If the pressure is not the same in both directions, there is a problem in the shuttle 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:

a. Loosen locknut (4).

b. Turn adjusting screw (2) clockwise to increase the pressure setting and counterclockwise to decrease the pressure setting. Tighten the locknut.

6. After the correct pressure setting is obtained, stop the engine. Remove the pressure gauge from the pressure tap. Place the protective cover on the test fitting.

7. Remove the steering frame lock pin and place it in the stored position.

Steering Pilot System Pressure - Test

SMCS Code: 4300-032-PS

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Personal injury or death can result from machine articulation or movement.
Machine frames can move and a person can be crushed.

Install the steering frame lock pin in the bores of the front and rear frames before working on the machine.

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Always use a board or cardboard when checking for a leak.

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NOTICE

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 fluids according to local regulations and mandates.

Pressure Test Point for the Pilot Oil Pressure
(1) Pressure test point for the pilot system.

1. Attach the correct hose and pressure gauge to pressure test point (1).

2. Put blocks in front of and behind the wheels.

3. Start and run the engine at low idle rpm. Disengage the parking brake. The pressure reading with the oil at normal temperature should be 3515 ± 70 kPa (510 ± 10 psi).

4. If the pressure is not correct, engage the parking brake and stop the engine.

5. Depress the brake pedal at least 80 times to release any pressure in the brake accumulators.

6. Move the joystick control lever to all positions to release any pressure in the implement pilot circuits.

7. Move the STIC steering control several times in both directions to release any pressure in the steering system.

8. Press and hold the vacuum breaker/relief valve to remove any pressure in the hydraulic tank.

Location of the Pilot Oil Pressure Reducing Valve
(2) Pilot oil pressure reducing valve.

Pilot Oil Pressure Reducing Valve
(2) Pilot oil pressure reducing valve. (3) Adjusting screw (internal).

9. Using an 8 mm (.3149 inch) allen wrench, turn adjusting screw (3) inside valve (2) clockwise to increase pressure and counterclockwise to decrease pressure.

10. Repeat Step 3.

11. If the pressure reading is correct, engage the parking brake and stop the engine. Remove the test equipment from pressure test point (1). Place the protective cover on the test fitting.

12. If the pressure reading is not correct, engage the parking brake and stop the engine. Repeat Steps 5 through 10.

Steering Cylinder Crossline Relief Valve - Test and Adjust

SMCS Code: 4322-025; 4322-081

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Personal injury or death can result from machine articulation or movement.
Machine frames can move and a person can be crushed.

Install the steering frame lock pin in the bores of the front and rear frames before working on the machine.

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Always use a board or cardboard when checking for a leak.

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NOTICE

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 fluids according to local regulations and mandates.

Steering Frame Lock Pin Installed
(1) Steering frame lock pin.

To check the crossline relief pressure in each steering cylinder, perform the following procedure:

1. Install steering frame lock pin (1) so the machine can not turn.

2. Move the STIC steering control several times in both directions to release any pressure in the steering system.

3. Press and hold the vacuum breaker/relief valve to remove any pressure in the hydraulic tank.

Location of the Crossline Relief Valve
(2) Crossline relief valve. (3) Locknut. (4) Crossline relief valve manifold.

4. Disconnect the hose to the rod end of the steering cylinder from crossline relief valve manifold (4). Connect an electric or pneumatic external hydraulic pump with a 0 to 28 000 kPa (0 to 4000 psi) gauge to the fitting on the relief valve manifold.

5. Disconnect the hose to the head end of the steering cylinder from crossline relief valve manifold (4). Attached a suitable hose to the fitting on the manifold. Put the other end of the hose into a suitable container for collecting the hydraulic oil.

6. Operate the hydraulic pump until crossline relief valve (2) opens and note the indication on the gauge. The correct pressure setting is 19 305 ± 170 kPa (2800 ± 25 psi).

7. If the pressure setting is incorrect, loosen locknut (3). Turn the adjusting screw clockwise to increase the pressure setting and counterclockwise to decrease the pressure setting.

8. After the correct pressure is obtained, tighten locknut (3). Remove the test equipment and connect the hoses to crossline relief valve manifold (4).

9. If necessary, perform Steps 2 to 8 for the crossline relief valve on the other steering cylinder.

10. Remove the steering frame lock pin and place it in the stored position.

Steering Time - Check

SMCS Code: 4300-531-D7

1. Move the machine to a location that is smooth, level, and hard. The location should also be dry and free of debris.

Steering Frame Lock Pin in the STORED Position
(1) Steering frame lock pin.

2. Move steering frame lock pin (1) to the STORED position.

To check the steering time, put the machine on a dry, hard surface. With the engine at high idle, the time for a full turn, from stop to stop, must not be more than 3.0 ± 0.2 seconds.

With the service brakes off, the difference between the time for a right turn and the time for a left turn must not be more than 0.3 second. With the service brakes engaged, the time must not increase by more than 0.2 second.

The difference between the times for a full right turn and a full left turn with the service brakes off must not be more than 0.3 second. If the steering time is out of specification, refer to the following reference.

Reference: For additional information on adjusting the steering time, refer to Systems Operation, Testing and Adjusting, "Steering Control Valve - Adjust" for the machine that is being serviced.

Steering Control Valve - Adjust

SMCS Code: 4307-025

NOTE: Adjustments to the steering control valve should only be performed after you complete the procedure in the following reference.

Reference: For the correct procedure to check the steering time, refer to Systems Operation, Testing and Adjusting, "Steering Time - Check" for the machine that is being serviced.

Steering Control Valve
(1) Cylinder flow shims. (2) Control valve. (3) Flow balance shims.

Steering Time Adjustment

1. Remove the end cover from steering control valve (2).

2. Add flow balance shims (3) to decrease the right turn time (steer faster) and increase the left turn time (steer slower). If the flow balance shims are removed, the result is opposite.

3. The 8B-3115 flow balance shims are 0.25 mm (.010 inch) thick. Two shims will change the steering time at high idle by approximately 0.1 second.

4. Install the end cover on the control valve.

Example: A check of the steering times shows that the right turn time is 0.4 second more than the left turn time. Flow balance shims (3) must be added to decrease the difference between the times.

The addition of four shims will decrease the right turn time by approximately 0.2 second and increase the left turn time by approximately 0.2 second. This will make the right and left turn times approximately the same.

Cylinder Flow Adjustment

Both steering times (right and left) must be 3.0 ± 0.2 seconds. If they are not, cylinder flow shims (1) must be added or removed.

5. Remove the end cover from steering control valve (2).

6. Add shims (1) to decrease both steering times. If an increase in the steering times is required, remove shims.

The 8M-8211 Shims are 0.25 mm (.010 inch). Three shims will change the steering times at high idle by approximately 0.06 second.

The 7M-8538 Shims are 0.91 mm (.036 inch). Three shims will change the steering times at high idle by approximately 0.2 second.

7. Install the end cover on the control valve.

Steering Slip (Wheel Steer) - Check

SMCS Code: 4300-535

To check the steering wheel slip:

1. Put the machine on a dry, hard surface. Raise the bucket and disengage the brakes.

2. With the engine at low idle, turn the steering wheel slowly through one revolution so that there is a minimum of articulation. Perform this in both directions to get the feel of the steering action.

3. Perform this test three more times in each direction. Make a note of the time required for each of the revolutions of the steering wheel.

4. Add the three times for each direction. If these totals are 60 seconds or more, the slip is acceptable.

5. If the totals are less than 60 seconds, remove the spool from the steering control valve. Turn the spool around in its bore (turn it end for end). To do this the spring, retainer and shims must be installed on the opposite end of the spool. In some cases this will correct the problem of manufacturing tolerances and the slip will then be acceptable.

Steering Neutralizer Valve - Check and Adjust

SMCS Code: 4330-025; 4330-535

1. Move the machine to a location that is smooth, level, and hard. The location should also be dry and free of debris.

Steering Frame Lock Pin in the STORED Position
(1) Steering frame lock pin.

2. Move steering frame lock pin (1) to the STORED position.

Location of the Steering Frame Stop
(1) Frame stop (one on each side of machine).

To check the adjustment of striker (3):

3. Put a 19 mm (.75 inch) ball of putty (or similar material) in the center of frame stop (1) on both sides of the machine.

4. Start the engine and raise an empty bucket approximately 305 mm (12 inch) off the ground. Disengage the parking brake.

5. With the engine at high idle, steer rapidly into both stops.

6. Steer the machine into the straight ahead position and engage the parking brake. Lower the bucket to the ground. Stop the engine.

7. Measure the thickness of the putty. The putty must be 12.0 ± 3.0 mm (.47 ± .12 inch) after the turns. This is the clearance between the frame stops when a full turn is made.

Location of the Neutralizer Valve and Striker
(2) Neutralizer valve. (3) Striker.

8. If the clearance is not correct adjust strikers (3) until the dimension is correct.

9. Repeat Steps 1 through 5 until the correct clearance is obtained.

Steering Primary Lockout Lever (STIC Steer) - Adjust

SMCS Code: 3034-025

STIC Steering Primary Lockout Assembly
(1) Adjusting screw. (2) Locknut. (3) Lock lever assembly.

1. Remove the cover from the steering lock assembly.

2. Ensure the STIC control lever is in the HOLD position.

3. Engage the steering lock lever.

4. Measure the clearance between adjusting screws (1) and lock lever assembly (3). The correct measurement should be 0.5 ± 0.25 mm (.020 ± .010 inch).

5. If the STIC steering lock measurement is not correct, loosen locknuts (2). Adjust screws (1) to obtain a clearance of 0.5 ± 0.25 mm (.020 ± .010 inch). Tighten locknuts (2).

6. Move the lock lever to the unlocked position.

7. Move the STIC control lever to the left and right steer positions with the engine stopped.

8. Repeat Steps 2 through 7 until the correct STIC steering lock adjustment is obtained.

9. Install the cover.

Steering Secondary Lockout Valve (STIC Steer) - Check

SMCS Code: 4330-535

Steering Frame Lock pin Installed
(1) Steering frame lock pin.

1. Install steering frame lock pin (1) so the machine can not turn.

2. Start the engine and operate it at low idle.

3. Move the steering control in either direction so that the steering system attemps to turn the machine.

4. Open the operator's station door slowly until the attempted steering action is stopped.

5. Measure the distance from the outside edge of the operator's station to the inside edge of the door. The correct measurement should be 50 ± 20 mm (2 ± .79 inch).

Location of the Steering Secondary Lockout Components
(2) Secondary steering lockout valve. (3) Striker block.