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Personal injury or death can result from improper maintenance procedures. To avoid injury or death, follow the procedures exactly as stated below. |
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Ensure that the engine cannot be started while this maintenance is being performed. To help prevent possible injury, do not use the starting motor to turn the flywheel. Hot engine components can cause burns. Allow additional time for the engine to cool before measuring/adjusting valve lash clearance. |
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Tilting the cab while the cab is occupied could result in serious personal injury or death. Before the cab is tilted, remove all loose articles from the cab, and secure all the cab windows and the cab doors. Be sure that the cab is not occupied before the cab is tilted. The improper securing of a tilted cab can cause the cab to fall suddenly which could result in personal injury or death. Before you work under a tilted cab, be sure to install the lock pin in order to prevent the cab from falling. Refer to the Operation and Maintenance Manual for the correct procedure for tilting the cab. |
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Crush Hazard! Improper securing of a tilted cab can cause the cab to fall resulting in serious injury or death. Install the safety lock pin to prevent the cab from falling before working under a tilted cab. Refer to the Operation and Maintenance Manual for the correct cab tilting procedure. |
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The use of unapproved replacement parts on the cab may result in unexpected motion of the cab which could result in serious injury or death. Only use replacement parts on the cab that are approved by AVSpare. |
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Performance of the cab tilt procedure with foreign objects inside of the cab or with personnel inside of the cab may result in serious injury or death. Before you perform the cab tilt procedure, ensure that the cab is free of all foreign objects, and ensure that the cab is unoccupied. Do not attempt to climb on the cab once the cab is tilted. |
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Tilt the cab only as instructed in the Operation and Maintenance Manual. Failure to properly follow the instructions for the cab tilt procedure may result in damage to the machine and/or serious injury or death. The cab tilt procedure must be followed exactly as stated in the Operation and Maintenance Manual. |
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If the proper torquing procedure is not used when reinstalling the ROPS structure, the ROPS structure may be weakened which could result in serious injury or death. Ensure that all contact surfaces are clean before reinstalling the ROPS structure. Ensure that the correct torquing procedure is followed when reinstalling the ROPS structure. |
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If the cab tilt cylinder is connected and a crane is used to tilt the cab instead of the cab tilt cylinder, serious damage to the machine and/or serious injury or death may occur. Ensure that the cab tilt cylinder is disconnected from the cab when using a crane as the lifting device to tilt the cab. |
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The weight of the cab is approximately 1400 kg (3085 lb). Use a crane that is capable of lifting the weight of the cab. Use rotating hooks that are capable of lifting the weight of the cab. |
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Only qualified service personnel should perform this maintenance. Refer to the Systems Operation/Testing and Adjusting Manual, "Valve Lash and Valve Bridge Adjustment" article or consult your AVSpare dealer for the complete valve lash adjustment procedure. Operation of AVSpare engines with improper valve adjustments can reduce engine efficiency. This reduced efficiency could result in excessive fuel usage and/or shortened engine component life. |
This maintenance is recommended by AVSpare as part of a lubrication and preventive maintenance schedule in order to help provide maximum engine life.
Ensure that the engine is stopped before measuring the valve lash. To obtain an accurate measurement, allow the valves to cool before this maintenance is performed.
In order to access the valves, the cab must be tilted. Use one of the following procedures in order to tilt the cab:
Manual Tilt
Raising the Cab
- Park the machine on level ground. Place the transmission lever in the PARK position. Lower the bucket and any attachments. Engage the parking brake.
- Open the access door that is located below the cab on the right side of the machine.
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| Illustration 1 | g01254537 |
- Disconnect electrical harnesses (1) and remove cab harness (2) .
- Remove the bolts (3) from the base of the ROPS posts. There are four bolts on the right side and there are four bolts on the left side.
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| Illustration 2 | g01349734 |
- Dismount the guard for the rubber mount (A) .
Note: IMPORTANT A cab with "Steel Mill" arrangement has extra steps in order to tilt the cab. Follow step 5 through step 8. Continue to step 9 if the cab is without a "Steel Mill" arrangement.
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| Illustration 3 | g01934774 |
- If the cab is tilted more than 30 degrees, in order to avoid interference dismount the screen for the front window. Remove the four bolts (B) in order to dismount the screen for the front window.
- Dismount the handle for the brake release pump (C) .
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| Illustration 4 | g01934776 |
- Position the valve lever to the upward position (D) .
- Insert rotating hooks into the lifting points (4) on the cab. There is one lifting point on the right side of the cab and there is one lifting point on the left side of the cab.
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| Illustration 5 | g01349735 |
- Use a crane to lift the cab until the back side of the cab reaches the top of the engine compartment.
- Open the access doors on the left side of the machine.
- Remove the red safety lock pin (5) .
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Cab and cab components may be damaged if the back side of the cab is raised beyond the top of the engine compartment. |
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| Illustration 6 | g01349806 |
- Raise the prop rod (6) and adjust the height of the cab until the end of the prop rod is aligned with the red circle on the bracket (7) .
- Insert the safety lock pin through the bracket and through the prop rod.
Note: Ensure that the safety lock pin passes through the far side of the bracket.
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| Illustration 7 | g01349740 |
Lowering the Cab
- Raise the cab slightly in order to relieve the pressure on the safety lock pin.
- Remove the safety lock pin from the bracket.
- Lower the prop rod from the bracket and lower the prop rod into the storage position.
- Insert the safety lock pin into the storage position.
- Clean the interface in order to install the bolts for the ROPS.
- Lower the cab to the original position.
- Reposition the valve lever clockwise until the lever stops.
Note: For a cab with "Steel Mill" arrangement, follow step 7 through step 10. Continue to step 11 if the cab is without a "Steel Mill" arrangement.
- Mount the handle for the brake release pump.
- Reinstall the screen for the front window unless the screen is mounted to the window.
- Mount the guards for the rubber mount.
- Install the bolts in the base of the ROPS posts. Tighten the bolts to a torque of 240 N·m (177 lb ft).
- Connect the electrical harnesses and install the cab harness.
- Close all access doors.
Hydraulic Tilt (If Equipped)
Raising the Cab
- Park the machine on level ground. Place the transmission lever in the PARK position. Lower the bucket and any attachments. Engage the parking brake.
- Open the access door that is located below the cab on the right side of the machine.
- Disconnect electrical harnesses (1) and remove cab harness (2) . Refer to Illustration 1.
- Remove the bolts (3) from the base of the ROPS posts. There are four bolts on the right side and there are four bolts on the left side. Refer to Illustration 2.
- Dismount the handle for the brake release pump (C) .
Note: IMPORTANT A cab with "Steel Mill" arrangement has extra steps in order to tilt the cab. Follow step 5 and step 6. Continue to step 7 if the cab is without a "Steel Mill" arrangement.
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| Illustration 8 | g01934776 |
- Position the valve lever to the upward position (D) .
- Open the front access door on the left side of the machine.
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| Illustration 9 | g01352461 |
- Remove the safety lock pin (9) from the lower bracket (11) .
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| Illustration 10 | g01353155 |
- Align the eye of the rod end of the tilt cylinder (8) with the eye of the upper bracket (10) .
- Insert the safety lock pin through the eye of the upper bracket.
Note: Ensure that the safety lock pin passes through the far side of the upper bracket.
- Remove the pump handle (12) from the clips and insert the handle into the pump.
Note: Ensure that the pump lever (13) is in the upward position.
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| Illustration 11 | g01328749 |
- Pump the hydraulic pump approximately 5 times and close the upper access door.
- Continue to pump the hydraulic pump until the hydraulic cylinder reaches full stroke.
- Remove the pin (14) from the lock bar (15) .
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| Illustration 12 | g01353256 |
- When the cylinder reaches full stroke, the lock bar should lie along the cylinder rod. Insert the pin in the lock bar in order to secure the lock bar onto the cylinder rod.
- When the hydraulic cylinder is at full stroke, place the pump lever in the downward position.
- Pump the hydraulic pump until the bottom end of the lock bar contacts the hydraulic cylinder.
Lowering the Cab
- Clean the interface in order to install bolts for the ROPS.
- Remove the pin from the lock bar.
- Place the pump lever in the upward position.
- Pump the hydraulic pump until the cylinder reaches full stroke.
- Place the pump lever in the downward position.
- Pull on the strap (16) until the bottom end of the lock bar is above the cylinder.
- Insert the pin into the lock bar.
- Pump the hydraulic pump in order to lower the cab.
- When the cab is fully lowered, remove the safety lock pin from the upper bracket.
- Align the eye of the lower bracket with the eye of the rod end of the tilt cylinder and insert the safety lock pin.
- Remove the pump handle and return the handle to the storage location.
- Reposition the valve lever clockwise until the lever stops.
Note: For a cab with "Steel Mill" arrangement, follow step 12 and step 13. Continue to step 14 if the cab is without a "Steel Mill" arrangement.
- Mount the handle for the brake release pump.
- Install the bolts in the base of the ROPS posts. Tighten the bolts to a torque of 240 N·m (177 lb ft).
- Connect the electrical harnesses and install the cab harness.
- Close all access doors.