9 INFORMACIÓN PRÁCTICA
9.4 DIRECCIONES ÚTILES
SMCS Code: 1353-070-Z2; 1353-510-Z2
Pressurized system: Hot coolant can cause seri- ous burn. To open cap, stop engine, wait until ra- diator is cool. Then loosen cap slowly to relieve the pressure.
Ripper Linkage and Cylinder Bearings - Lubricate
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Illustration 151
1. Open the access cover to the radiator cap on top of the engine enclosure. Slowly remove the radiator cap in order to relieve system pressure. 2. Inspect the radiator cap for damage, for deposits,
or for foreign material. Clean the radiator cap with a clean cloth. Replace the radiator cap if the radiator cap is damaged.
3. Install the radiator cap.
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Ripper Linkage and Cylinder
Bearings - Lubricate
SMCS Code: 6313-086-BD, L4
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Illustration 152 D7G ripper
1. Lubricate the twenty grease fittings for the ripper arrangement.
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Ripper Tip and Shank Protector
- Inspect/Replace
SMCS Code: 6808-040; 6808-510; 6810; 6812-040; 6812-510 If equipped:Tips
g01290171 Illustration 153When the ripper tip is worn close to the shank, replace the ripper tip. If the tip is too blunt, the tip will not penetrate properly.
1. Raise the ripper. Place blocking under the ripper. Lower the ripper onto the blocking. The ripper should be high enough so that the ripper tip can be removed. Do not place the ripper too high. 2. If the ripper tip is worn, drive out pin (1). Remove
tip (2) and the shank pin retainer. 3. Clean the shank pin retainer and the pin. 4. Install the new tip and the retainer.
5. Install pin (1) from the opposite side of the retainer. 6. Raise the ripper and remove the blocking.
Seat Belt - Inspect
Shank
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Illustration 154
When the ripper shank is worn or damaged, replace the ripper shank.
1. Raise the ripper. Place blocking under the ripper. Lower the ripper onto the blocking. The ripper should be high enough so that the ripper shank can be removed. Do not place the ripper too high. 2. If the shank is worn or damaged, remove cotter
pin (3). Then drive out pin (4). Remove shank (5). 3. Install the new shank and pin (4).
4. Install cotter pin (3).
5. Raise the ripper and remove the blocking. 6. Lower the ripper to the ground.
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Seat Belt - Inspect
SMCS Code: 7327-040; 7520
Always check the condition of the seat belt and the condition of the seat belt mounting hardware before you operate the machine. Replace any parts that are damaged or worn before you operate the machine.
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Illustration 155 Typical example
Check the seat belt mounting hardware (1) for wear or for damage. Replace any mounting hardware that is worn or damaged. Make sure that the mounting bolts are tight.
Check buckle (2) for wear or for damage. If the buckle is worn or damaged, replace the seat belt.
Inspect the seat belt (3) for webbing that is worn or frayed. Replace the seat belt if the seat belt is worn or frayed.
Consult your Caterpillar dealer for the replacement of the seat belt and the mounting hardware.
Note: Within three years of the date of installation or within five years of the date of manufacture, replace the seat belt. Replace the seat belt at the date which occurs first. A date label for determining the age of the seat belt is attached to the seat belt, the seat belt buckle, and the seat belt retractor.
If your machine is equipped with a seat belt
extension, also perform this inspection procedure for the seat belt extension.
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Seat Belt - Replace
SMCS Code: 7327-510
Within three years of the date of installation or within five years of the date of manufacture, replace the seat belt . Replace the seat belt at the date which occurs first. A date label for determining the age of the seat belt is attached to the seat belt, the seat belt buckle, and the seat belt retractor.
Sprocket Hub Bearings - Adjust
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Illustration 156
(1) Date of installation (retractor) (2) Date of installation (buckle)
(3) Date of manufacture (tag) (fully extended web) (4) Date of manufacture (underside) (buckle)
Consult your Caterpillar dealer for the replacement of the seat belt and the mounting hardware.
If your machine is equipped with a seat belt extension, also perform this replacement procedure for the seat belt extension.
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Sprocket Hub Bearings -
Adjust
SMCS Code: 4054-025
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Illustration 157
Adjust the preload on the sprocket hub bearings. Refer to the Service Manual or consult your Caterpillar dealer.
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Sprocket Hub Bearings -
Inspect
SMCS Code: 4054-040
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Illustration 158
Inspect the sprocket hub bearing on new machines. Inspect the sprocket hub bearing on reconditioned machines.
See Operation and Maintenance Manual, “Sprocket Hub Bearings - Adjust”.
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Sprocket Hub Bearings -
Inspect
SMCS Code: 4054-040
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Illustration 159
Check for oil leaks on both sides of the sprocket. If the leakage is noticeable, the seals and/or bearings need to be replaced. Refer to the Service Manualfor this procedure. If the Service Manual is not available, contact your Caterpillar dealer.
Track - Check/Adjust
Check the bearing preload. The machine must be put on stands. With the machine off the ground, this will reduce the load on the sprockets. Refer to the Service Manual For this procedure. If the Service Manual is not available, contact your Caterpillar dealer.
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Track - Check/Adjust
SMCS Code: 4170-036
Grease is under high pressure.
Grease coming out of the relief valve under pres- sure can penetrate the body causing injury or death.
Do not watch the relief valve to see if grease is es- caping. Watch the track or track adjustment cylin- der to see if the track is being loosened.
Loosen the relief valve only one turn.
Check
Check the track adjustment. Check the track for wear and for excessive dirt buildup.
1. Move the machine forward for a distance of two times the length of the machine. Stop the machine on a level surface without the use of the service brake. Lower all the implements. Apply slight down pressure to all the implements. Engage the parking brake lock lever. Place the transmission in NEUTRAL and stop the engine.
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Illustration 160 Left track roller frame
NOTICE
Do not attempt to tighten the track when dimension (X) is less than 3 mm (0.12 inch). Consult your Caterpillar dealer for track service or instructions.
2. Measure the “X” dimension.
3. Stand on the track between the front idler and the track carrier roller in order to produce as much track sag as possible.
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Illustration 161
Points (1, 2) are above the centerlines when the machine is stopped.
4. Attach one end of a string to the grouser tip on the track shoe that is directly above track carrier roller (1). Make the string tight by pulling on the string. Attach the opposite end of the string to the grouser tip on the track shoe (2) that is directly above the front idler .
5. Measure the distance between the string and the tip of the grouser that is on the track shoe directly between the front idler and the track carrier roller in order to obtain dimension (A).
6. Dimension (A) should be approximately 50 mm (2.0 inch). If dimension (A) is not correct, adjust the track.
Track - Check/Adjust
Adjust
Grease is under high pressure.
Grease coming out of the relief valve under pres- sure can penetrate the body causing injury or death.
Do not watch the relief valve to see if grease is es- caping. Watch the track or track adjustment cylin- der to see if the track is being loosened.
Loosen the relief valve only one turn.
1. Move the machine forward for a distance of two times the length of the machine. Allow the machine to a stop without the use of the service brakes. Shut off the engine. Adjust the tracks while you are in the machine’s typical operating conditions. If packing conditions prevail on the job, the tracks should be adjusted with packing material.
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Illustration 162
2. Remove the cover for the track adjusting mechanism.
3. Add grease (MPGM) through adjusting valve (4) in order to move the idler forward until the track is fully tight.
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Illustration 163 (B) Mark on roller frame
4. Mark the roller frame with a pencil or with a marking pen. Make a mark (B) that is 12 mm (0.50 inch) behind idler bearing support (5). This allows the necessary space for the front idler to retract.
5. Allow the idler to move back by opening relief valve (3) ONE TURN ONLY. Move the machine in REVERSE. This will help move the idler backward. 6. Close relief valve (3).
7. Add grease (MPGM) through adjusting valve (4) until the mark on roller frame (B) is aligned with the rear edge of idler bearing support (5).
8. Install the valve cover plate. Tighten the bolts to a torque of 75 ± 15 N·m (55.5 ± 11.0 lb ft).
Note: The track sag after this adjustment procedure should be 50 mm (2.0 inch). If track sag is not 50 mm (2.0 inch), repeat the procedure.
9. Repeat the procedure on adjusting of the other track for the other side.