Vibrator System Troubleshooting

PROBLEM: Vibrators do not vibrate when vibrator switch is moved to "On".

PROBABLE CAUSE:

1. The hydraulic hoses are kinked or are not correctly connected to the tractor.

2. The electrical wires to the vibrator (Compactor) switch are disconnected or corroded.

3. The vibrator (Compactor) switch is defective.

4. The spool in the vibrator solenoid valve is stuck in the open position.

PROBLEM: Vibrators do not stop vibrating when vibrator switch is moved to "Off".

PROBABLE CAUSE:

1. The vibrator (Compactor) switch is defective.

2. The spool in the vibrator solenoid valve is stuck in the closed position.

PROBLEM: Vibrator motors rotate more than 2 or 3 turns after vibrator switch is moved to "Off".

PROBABLE CAUSE:

1. The load control valve is not properly adjusted.

PROBLEM: Vibration rate is lower than normal.

PROBABLE CAUSE:

1. The vibrator flow control valve is not properly adjusted.

2. The hoses are kinked or partially clogged.

3. The spool in the vibrator solenoid valve is sticking.

4. Vibrator motor defective.

Extension System Troubleshooting

PROBLEM: One screed extension will not extend, the other extension will extend.

PROBABLE CAUSE:

1. Extension system wires are disconnected or corroded.

2. The solenoid spool is sticking.

3. The extension switch that controls that extension is defective.

4. The extension cylinder is defective.

PROBLEM: Neither screed extension will extend.

PROBABLE CAUSE:

1. Extension system wires are disconnected or corroded.

2. The hydraulic hoses are kinked or are not correctly connected to the tractor.

PROBLEM: Solenoid valve leaking externally.

PROBABLE CAUSE:

1. The solenoid O-rings or Quad rings are damaged.

2. The solenoid tie bolts are loose.

3. The solenoid is damaged.

PROBLEM: Solenoid valve spool sticking.

PROBABLE CAUSE:

1. Dirt has become lodged in the system.

2. Tie bolts tightened to incorrect torque and causing distortion.

3. Wiring broken or solenoid not working properly.

Problem: Solenoid will not operate.

PROBABLE CAUSE:

1. Power source less than 85% of the solenoid coil rating.

2. Solenoid assembly is damaged.

3. Solenoid has a short circuit.

4. Solenoid coil has burned out.

Fuel Burner System Troubleshooting

PROBLEM: No oil spray in any of the burner assemblies.

PROBABLE CAUSE:

1. The fuel line is not correctly connected to the tractor.

2. The fuel lines are clogged or kinked.

3. The spin-on filter is plugged.

4. The tractor fuel pump is not working correctly.

PROBLEM: No oil spray in one burner assembly. Other burner assemblies have spray.

PROBABLE CAUSE:

1. The fuel supply valve for the burner assembly is not open.

2. The fuel supply line from the supply valve and the burner assembly is plugged or kinked.

3. An inline filter is plugged.

4. The spray nozzle is plugged.

PROBLEM: A single burner assembly has oil spray but will not ignite.

PROBABLE CAUSE:

1. The burner assembly damper is opened too far.

2. The glow plug is not working correctly.

3. The switch in the burner assembly control panel is not working correctly.

4. The electric cable between the burner assembly control panel and the burner assembly has a break in it.

PROBLEM: All burner assemblies have oil spray but none will ignite.

PROBABLE CAUSE:

1. The burner assembly dampers are opened too far.

2. The electric cable between the tractor and the burner assembly control panel is not connected correctly or has a break in it.

3. Tractor alternator is not working correctly and the battery charge is low.

4. There is water in the fuel.

PROBLEM: A burner assembly ignites and then goes out.

PROBABLE CAUSE:

1. The burner assembly damper is not adjusted properly.

2. The line from the fuel supply valve to the burner assembly is not fully open.

3. The fuel supply valve is not adjusted properly.

4. The burner assembly fuel nozzle is partially plugged.

PROBLEM: All burner assemblies ignite correctly, then go out.

PROBABLE CAUSE:

1. The spin-on filter is partially plugged.

2. The tractor fuel pump is not working correctly.

3. The fuel line is not correctly connected to the tractor.

Vibrator Electrical System Troubleshooting

PROBLEM: Vibrators do not vibrate when vibrator switch is moved to "On".

PROBABLE CAUSE:

1. The hydraulic hoses are kinked or are not correctly connected to the tractor.

2. The electrical wires to the vibrator (Compactor) switch are disconnected or corroded.

3. The vibrator (Compactor) switch is defective.

4. The spool in the vibrator solenoid valve is stuck in the open position.

PROBLEM: Vibrators do not stop vibrating when vibrator switch is moved to "Off".

PROBABLE CAUSE:

1. The vibrator (Compactor) switch is defective.

2. The spool in the vibrator solenoid valve is stuck in the closed position.

PROBLEM: Vibration rate is lower than normal.

PROBABLE CAUSE:

1. The vibrator flow control valve is not properly adjusted.

2. The hoses are kinked or partially clogged.

3. The spool in the vibrator solenoid valve is sticking.

4. Vibrator motor defective.

Burner Electrical System Troubleshooting

PROBLEM: A single burner assembly has oil spray but will not ignite.

PROBABLE CAUSE:

1. The burner assembly damper is opened too far.

2. The glow plug is not working correctly.

3. The switch in the burner assembly control panel is not working correctly.

4. The electric cable between the burner assembly control panel and the burner assembly has a break in it.

PROBLEM: All burner assemblies have oil spray but none will ignite.

PROBABLE CAUSE:

1. The burner assembly dampers are opened too far.

2. The electric cable between the tractor and the burner assembly control panel is not connected correctly or has a break in it.

3. Tractor alternator is not working correctly and the battery charge is low.

4. There is water in the fuel.

Screed Control Electrical System Troubleshooting

PROBLEM: One screed extension will not extend, the other extension will extend.

PROBABLE CAUSE:

1. Extension system wires are disconnected or corroded.

2. The solenoid spool is sticking.

3. The extension switch that controls that extension is defective.

4. The extension cylinder is defective.

PROBLEM: Neither screed extension will extend.

PROBABLE CAUSE:

1. Extension system wires are disconnected or corroded.

2. The hydraulic hoses are kinked or are not correctly connected to the tractor.

PROBLEM: Solenoid valve spool sticking.

PROBABLE CAUSE:

1. Dirt has become lodged in the system.

2. Tie bolts tightened to incorrect torque and causing distortion.

3. Wiring broken or solenoid not working properly.

PROBLEM: Solenoid will not operate.

PROBABLE CAUSE:

1. Power source less than 85% of the solenoid coil rating.

2. Solenoid assembly is damaged.

3. Solenoid coil has a short circuit.

4. Solenoid coil has burned out.

Procedure for Leveling VIP Main Screed

NOTE: The front wear plate will have to be removed to level the screed.

1. Retract both screed extensions to the "In" position.

2. Lower the screed to rest on a flat surface and align each tow arm (1) with the center hole (2) in the slide bar (3). Turn both depth control screws in or out until each screw is at its null point - no load can be felt when the screw is turned either direction.

3. Raise the screed and rest it on the screed locks. Check the main screed section for any center crown that might be present by placing a 1.8 M (6 foot) straight edge (4) across the bottom of the screed at the front center (5) of the screed. Repeat the process at the rear center (6) of the screed.

4. Measure between the leading edge of the main screed wear plates (1) and the nose bar (2) at various points across the screed. If the screed plates are not within .8 mm (.03 inch) below or flush (3) with the nose bar, the screed plates must be shimmed (see step 6).

5. Check the flatness of the main screed plates by placing a 1.8 M (6 foot) straightedge (1) across the front bottom (2) of the screed at one end or the other. Move the straightedge toward the other end of the screed in 61 cm (2 foot) steps until the other end is reached. The screed plates must be within 1.6 mm (.06 inch) of being flat, or the plates must be shimmed (see step 6). Repeat the procedure at the trailing edge (3) of the main screed plates and shim as necessary (see step 7). Check the flatness of the extendable screed plates in the same way.

Show/hide table

Loosening the wear plate nuts too much could cause the stud and nut to fail, allowing the wear plate to drop. Personal injury could result. Loosen the wear plate nuts only enough to allow shims to be removed or installed.

6. If the leading edge of the screed wear plates require shimming, remove the nose bars and loosen the front nuts just enough to remove or install shims. Remove or install the shims, then tighten the wear plate nuts and reinstall the nose bars. Repeat steps 4 and 5.

7. If the trailing edge of the screed wear plates require shimming, loosen the rear nuts just enough to remove or install shims. Remove or install the shims, then tighten the wear plate nuts. Repeat steps 4 and 5.

8. With both the extendable screeds completely retracted, use the hand cranks to raise the extendable screeds above the main screed. Place a 1.8 M (6 foot) straightedge (1) against the bottom of the main screed, longitudinally about 15.2 cm (6 inches) inside one of the screed end plates. The straightedge should touch the leading and trailing edges of the main screed (2) and extend past the extendable screed (3) trailing edge. Use the hand crank to lower the extendable screed until the trailing edge touches the straightedge. The leading edge of the extendable screed should be approximately .38 cm (.125 inch) above the straightedge. Move the straightedge inward 1.07 M (3.5 ft) and repeat the procedure, except use the slope crank to adjust the height of the extendable screed.

If a slope adjustment is necessary when step 8 is performed, the procedure must be repeated. If the leading edge of the extendable screed is not .38 cm (.125 inch) above the straightedge, add shims at the trailing edge of the extendable screed to correct the measurement.

Procedure for Leveling VIP Screed Extension

1. With the machine on a flat, level surface, extend the screed extension.

2. At the front of the side plate, measure the distance from the top edge of the side plate support to the ground (1). Note the measurement.

3. At the rear of the side plate, measure the distance from the top edge of the side plate support to the ground (2). Note the measurement.

4. If the front of the side plate is lower than the rear, loosen the nut (3) and turn the nut (4) until the distances are equal.

If the rear of the side plate is lower than the front, loosen the nut (4) and turn the nut (3) until the distances are equal.

Repeat steps 2 and 3.

Procedure for Leveling V2 Screed

NOTE: It may be necessary to remove the screed walkways before leveling the screed.

1. Prepare the screed for leveling as follows:

a. With both screed extensions retracted to the IN position, lower the screed to rest on a flat surface.

b. Align each tow arm (1) with the center hole (2) in the slide bar (3).

c. Turn both depth control screws in or out until each screw is at its null point (no load can be felt when the screw is turned either direction).

d. Raise the screed and rest it on the tractor mechanical screed locks.

2. Check for center crown of screed as follows:

NOTE: Do not attempt to remove the positive crown from the leading edge (1) of the main screed. The front center of the main screed is pre-warped into a positive crown (2) at the factory by using spacers of different thickness, and will always show a positive crown.

a. Check main screed section for any positive center crown that is present at trailing edge (3) by placing a 1.8 m (6 ft) straightedge (4) across the bottom of the screed at the rear center.

b. If a positive crown (8) is visible on the trailing edge of the main screed, turn the crowning mechanism until the crown is removed.

3. Check the flatness of the screed wear plates as follows:

a. Place the 1.8 m (6 ft) straightedge (4) across the rear bottom of the screed (5) at one end.

NOTE: The strike-off and pre-strike-off must be removed to enable access for shimming leading edge of main screed wear plate.

b. The screed plate must be within 1.52 mm (.060 in) of being flat, or the plate must be shimmed. Move the straightedge toward the other end of the screed in 61 cm (2 ft) steps until the other end is reached.

c. The 1.52 mm (.060 in) flatness requirement must be checked for the screed at the leading edge of each end across the last three studs.

NOTE: The extension screeds must be checked individually. When checking plate flatness of one extension screed, do not allow the straightedge (4) to extend onto the other extension.

d. Check the flatness of both the leading (1) and the trailing (3) edge of the extendable screed wear plates. Use shims as necessary to maintain the same flatness as the main screed.

4. Check the screed attack angle as follows:

a. With both extendable screeds completely retracted, use the depth control handcranks to raise the extendable screeds above the main screed.

b. Place the 1.8 m (6 ft) straightedge (4) longitudinally against the bottom of the main screed within about 152 mm (6 in) inside one of the screed end plates. The straightedge should touch the leading (1) and the trailing (3) edges of the main screed, and extend past the extendable screed trailing edge (6).

c. Use the depth control handcrank to lower the extendable screed until the trailing edge just touches the straightedge. The leading edge of the extendable (rear) screed (7) must now be 1.52 - 3.18 mm (.060 - .125 in) above the straightedge.

d. If dimension is not within the 1.52 - 3.18 mm (.060 - .125 in), change by adjusting the front clevis (1) of lift bracket (2) on the outside end of the screed extension.

e. Now extend the extension outward until the inside end of extension is within approximately 152 mm (6 in) of the outside edge of the main screed.

NOTE: If slope factor is also a concern at this time, the drive shaft between the depth control actuators will have to be removed. Adjust actuator on the inside end only to make trailing edge of plate just touch the straightedge.

f. If necessary, use depth control handcranks again to adjust trailing edge so it just touches the straightedge. Now adjust the front clevis of the lift bracket on the inside end of extension to get the 1.52 - 3.18 mm (.060 - .125 in) dimension for the leading edge.

g. Repeat step e and step f for the other rear screed.

Procedure for Leveling Pavemaster Screed

NOTE: To level the screed, it will be necessary to remove the strike-off assembly, handrail assembly, and end gate assembly.

1. Remove the burner and blower assemblies.

2. Remove the right and left hand covers.

3. Remove the steps and the guard for the crowning assembly.

4. Check for center crown of the screed using the procedure that follows:

a. Raise the screed and rest it on the tractor mechanical screed locks.

b. Check for any crown that might be present by placing a 1.8 m (6 ft) straightedge (1) across the bottom of the screed at the rear center (2).

NOTE: Do not attempt to remove the positive crown (3) from the leading edge at the center of the screed. The screed base is manufactured with a built-in crown, and will always show a positive crown.

c. If a positive crown is visible on the trailing edge of the screed, turn crowning mechanism until the crown is removed.

5. Check for flatness of the screed wear plate by using the procedure that follows:

a. Place the 1.8 m (6 ft) straightedge (1) across the rear bottom of the screed (4) at one end.

b. The screed plate must be within 1.52 mm (.060 in) of being flat, or the plate must be shimmed. Move the straightedge from one end to the other in 61 cm (2 ft) steps.

NOTE: Any flatness problems at the leading edge must be noted and marked on the wear plate. The wear plate must then be removed to enable access for any shimming to the wear plate leading edge.

c. The 1.52 mm (.060 in) flatness requirement for the leading edge must be checked at each outboard end (5).

6. Install the burner and blower assemblies.

7. Install the right and left hand covers.

8. Install the steps and the guard for the crowning assembly.