Usage:
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Be certain the hydraulic pressure in the track adjusting mechanism is completely relieved and the cylinder can be moved to the rear into the recoil spring front pilot before attempting to separate the track or remove the track adjusting mechanism. |
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Release the pressure in the hydraulic track adjuster cylinder, WITH CAUTION as given in the following steps:
This is a view of the hydraulic track adjuster. Items indicated are: 1-Relief valve. 2-Fill valve. 3-Vent holes. 4-Cylinder. 5-Recoil spring front pilot.
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Because of the hydraulic pressure in the track adjuster cylinder, never visually inspect the vent holes and valves to see if lubricant is escaping. Always observe the cylinder to see that it moves to the rear into the recoil spring front pilot. |
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1. Turn relief valve counterclockwise one turn to allow lubricant to escape from vent hole just below RELIEF valve. Wait momentarily. If the cylinder does not retract turn FILL valve counterclockwise one turn.
2. If the cylinder does not retract into the front pilot, loosen the RELIEF valve until it contacts the underside of the guard. Lubricant should escape through slot in the lower section of threads.
3. If the cylinder does not retract loosen FILL valve until it contacts the underside of the guard. Lubricant should then escape through slot in the lower section of threads.
4. If the cylinder does not retract into the front pilot, the machine should be started and moved forward and backward.
5. If moving the machine does not cause the cylinder to retract, insert a draw bar pin between the track and sprocket. Move the machine backward so the track will be forced upward by the pin. This will apply additional tension to the track.
This is a drawing of the track adjuster mechanism. The items indicated are: 1-Relief valve. 2-Fill valve. 3-Vent holes. 6-Slots. A-Unthreaded section, relief valve. B-Unthreaded section, fill valve.
Separating Track
1. Relief track tension.
2. Remove the master pin using the 2S8210 Track Tool Group.
3. Separate the track.
4-Spacers (two). 5-Coned disc seal washers (four). 6-Master links (two).
7. Back the machine slowly, allowing the track to ride over the carrier roller and off the sprocket.
Track Disassembly
1 At assembly tighten track shoe bolts to a torque of 130 ± 30 lb. ft. (18 ± 4,1 mkg) plus an additional 1/3 turn. Install nuts with rounded corners next to the track link.
3 Remove and install pins with 2S8210 Track Tool Group.
4 Remove and install bushings with 2S8210 Track Tool Group. When installing the master bushing the ends should be flush with the outside faces of the links. Other bushings should protrude past the outside face of the links .321 ± .005 in. (8,15 ± 0,13 mm).
Installing Track
1. Back the machine until the sprocket is just ahead of the master links of the track.
2. Insert a bar into the links and help the track climb over the sprocket. Drive the machine forward slowly.
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Always hold the bar as illustrated. |
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3. Continue to carry the track over the rollers and front idler. Carry track high enough to clear carrier rollers.
4. Place a block under the first shoe, drive forward until master links and track links are about 1 in. (25,4 mm) apart. Install the coned disc seal washers and spacer in each master link.
This drawing shows the installation of coned disc seal washers and spacers. The parts pointed out are: 1-Spacers (two). 2 and 3-Coned disc seal washers (four). 4-Master links (two). 5-Track links (two).
5. Install each set of coned disc seal washers (as shown) with the inside diameters in contact. Install spacers (as shown) with beveled edges toward one another.
6. Assemble FT573 Holding Tool (Fabricated Tool) onto master links and tighten each bolt to compress seal washers. The spacers will be flush with inner face of links when seal washers are properly compressed.
7. Move the machine forward and drive the track together until the spacers are held in place by track links.
8. Remove the holding tool. Align the holes and install the master pin.
9. Adjust the track tension. See MAINTENANCE GUIDE.
Track Roller Frame Removal And Installation
1-Bolts (four). 2-Bolts. At installation lubricate threads with a thick mixture of oil and flowers of sulphur or an equivalent lubricant.
3-Bolts (nine). At installation lubricate threads with a thick mixture of oil and flowers of sulphur or an equivalent lubricant. 4-Shims. For parallel alignment of track roller frames. 5-Bolts (six). At installation lubricate threads with a thick mixture of oil and flowers of sulphur or equivalent lubricant.
6. Raise the side of the machine about 6 in. (152,4 mm); block securely. Remove the track roller frame by rolling it forward along the track.
7-Track roller frame replaceable wear strips.
Alignment Of Track Roller Frames
Aligning Track Roller Frame with Sprocket
The items involved in aligning the sprocket and track roller frame are: 1-Rear track roller. 2-Drive sprocket. A-Clearance. B-Clearance.
1. Center the recess of the rear track roller so the clearances between the sprocket and either edge of the track roller rim are equal.
2. Add shims (see FINAL DRIVE DISASSEMBLY) between the washer assembly and the holder assembly to move the roller frame out, decreasing the clearance (A). Remove shims between the washer assembly and the holder assembly to allow the roller frame to move in, decreasing clearance (B).
Parallel Alignment of Track Roller Frames
1. Align the track roller frames with the sprockets.
2. Measure the distance between the insides of the track roller frame channels at the rear.
The parts involved in parallel adjustment are: 1-Track roller frame. 2-Loader frame support. 3-Shims.
3. Measure the distance between the insides of the track roller frame channels just in front of the loader frame support.
4. Install shims between each end of the loader frame support and the roller frames so the distance in front is within .12 in. (3,05 mm) of the distance measured at the rear.
5. Install and tighten the bolts securing the loader frame support to the track roller frames and again check the distances.
The items involved in parallel adjustment of the track roller frames are: 1-Track roller frame. 2-Loader frame support. 3-Shims. A-Distance between roller frames at front. B-Distance between roller frames at rear.
Front Idler Removal And Installation
1-Bolts (four). Loosen until spring pressure is relieved.
3-Front idler. Attach hoist and remove by moving forward. 4-Plates (two). 5-Spring assemblies (four). 6-Plates (four).
Front Idler Disassembly
1 Apply 9M3710 Anti-Seize Compound in bearing bores and on bearing contact surfaces of shaft.
2 Tighten bolts to a torque of 40 lb. ft. (5,5 mkg). Seat tapered lockpins with a punch and hammer, then retighten bolts to a torque of 50 ± 10 lb. ft. (6,9 ± 1,3 mkg).
3 Oil hole on plug end of shaft to be assembled up.
4 Coat the outside diameter of the bushing assemblies with white lead. Use FT578 Alignment Tool Group (Fabricated Tool) to insure alignment of bolt holes.
5 Use 5M2196 Seal Installer to remove and install Duo-Cone seals.
6, 8 Use shims to align the front idler with the track. If the idler is too far toward the outside, move shims from the bearing at the inner end of the idler hub to the outer bearing. If the idler is too far toward the inside, reverse the process. After alignment, .06 in. (1,52 mm) should be maintained between each plate and track roller frame by using shims.
7 To replace bearings, press them out of bushings and cut off projecting dowels. File smooth the face of bushings where dowels were cut off. Press new bearings into place, making sure the lubricant holes are aligned. Drill two 19/64 in. holes, .75 in. (19,05 mm) deep, through the bearing flange and into the bushing wall (making certain the holes do not interfere with lubrication grooves in the face of the bearing flange). Install new dowels so they do not extend above the face of the bearing. Smooth the face of the bearing flange.
Front Idler Yoke, Recoil Rod And Track Adjusting Mechanism Removal And Installation
1-Bolts (four). 2-Bolts (six). 3-Yoke and recoil rod. 4-Track adjusting mechanism.
Recoil Spring Removal And Installation
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The spring in the recoil spring assembly is assembled under a force of several tons. Do not attempt to compress or decompress the spring by turning recoil spring bolt nut against this force as the threads could be stripped, allowing the assembly to fly apart. |
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1-Drawbar pin. 2-Locking bolt and washer. 3-Nut. Tighten against rear pilot.
1. Install a drawbar pin or hardwood block between the sprocket and the track and back the machine slightly to compress the recoil spring until all the tension is removed from recoil spring stops.
4. Remove drawbar or hardwood block, then separate and lay out the track.
5-Recoil spring stops. 6-Bolts (four).
7-Recoil spring assembly. Attach a hoist to remove. 8-Track adjusting mechanism.
After the recoil spring assembly, stops and track have been installed, compress the recoil spring as described above. Back off nut until it extends 1/16 in. (1,6 mm) beyond end of recoil spring bolt and lock in place with bolt and washer.
Recoil Spring Disassembly And Assembly
Use a press with at least 15 tons (13,608 kg) capacity, a minimum of 33 in. (838,2 mm) between press bed and ram and 8 in. (203,2 mm) of ram travel.
The parts of the recoil spring assembly are: 1-Recoil spring bolt. 2-Washer. 3-Spring. 4-Front pilot. 5-Retaining nut. 6-Rear pilot. 7-Sleeve. 8-Nut locking bolt.
1. Install the recoil spring assembly in a suitable press with rear pilot positioned on the press bed and front pilot centered with the press ram as shown.
This illustrates preparing to compress the recoil spring. The parts pointed out are: 4-Front pilot. 5-Retaining nut. 6-Rear pilot.
2. Apply enough pressure to the recoil spring assembly to remove retaining nut.
3. Remove retaining nut.
4. Back off the press ram to decompress the recoil spring.
5. Remove recoil spring bolt, front pilot and sleeve.
6. Attach a hoist to and remove recoil spring.
7. At assembly, position rear pilot over the choke in the press bed.
This illustrates preparing to reassemble the recoil spring. The parts pointed out are: 3-Spring. 4-Front pilot. 6-Rear pilot. 7-Sleeve. 8-Bolt. 9-FT572 Spring Bolt Guide Pin (Fabricated Tool).
8. Install recoil spring.
9. Install sleeve in recoil spring and install front pilot.
10. Screw guide pin onto recoil spring bolt as illustrated.
11. Insert recoil spring bolt through front pilot, sleeve and rear pilot.
12. Center the recoil spring assembly beneath the press ram and compress the assembly to assembled length 24.00 in. (609,6 mm), measured from the rear face of the front pilot to the front face of the rear pilot.
13. Remove guide pin. Install retaining nut.
Track Carrier Roller Removal And Installation
1. Raise track enough to clear track carrier roller.
2-Bolts (two). 3-Track carrier roller. When installing track carrier roller, align visually with track leaving a minimum clearance of .06 in. (1,6 mm) between end collar of roller and face of bracket.
At installation, lubricate bracket-to-loader frame bolts with a thick mixture of flowers of sulphur and oil or equivalent lubricant.
Track Carrier Roller Disassembly
1 Remove bearing cups using an 8B7554 Bearing Cup Pulling Attachment, and 8B7548 Push Puller.
2 Remove seal support using an 8H700 Puller, 8B7560 Step Plate and two 5/16" - 18 NC bolts, 5 in. (127 mm) long.
3 Use 5M2196 Seal Installer to remove and install Duo-Cone seals.
Track Roller Removal And Installation
1. To remove any of the three rear rollers, place a block approximately 12 in. (304,8 mm) high behind the track and drive the machine backward so the track climbs up on the block far enough to just lift the roller off the track.
2. Set the parking brake and place a jack or block on the opposite side of the machine under a track grouser in front of idler, to prevent the machine from moving forward off the block.
3. Remove the bolts from the end collars at each end of the roller to be removed.
4. Back the machine up on the block until it is in the position shown. The roller can then be lifted off the track.
5. To remove any of the three front rollers, drive the machine onto a block placed ahead of the idler and proceed in the same manner as described for removal of the rear rollers.
Track Roller Disassembly
1. Use 5M2196 Seal Installer to remove and install Duo-Cone seals.
2. Coat the outside diameter of the bushing assemblies with white lead. Use FT578 Alignment Tool Group (Fabricated Tool) to insure alignment of bolt holes.
3. To replace bearings, press them out of bushings and cut off projecting dowels. File smooth the face of bushings where dowels were cut off. Press new bearings into place, making sure the lubricant holes are aligned. Drill two 19/64 in. holes, .75 in. (19,05 mm) deep, through the bearing flange and into the bushing wall (making certain the holes do not interfere with lubrication grooves in the face of the bearing flange). Install new dowels so they do not extend above the face of the bearing. Smooth the face of the bearing flange.