17
AFFECTED MODELS: SR SERIES HARVESTERS
If hydraulic fluid leakage is noted at the area around the cavity plug, the plug may be loose causing the O-ring to fail. The cavity plug is located on the bottom of the flow control valve body assembly. Figure 1 shows the cavity plug with the flow control valve body removed and inverted.
Figure 1--Cavity Plug
If necessary, contact Bucyrus Equipment Company Inc. (800-330-0857) to obtain replacement O-rings (part No. 3-916) and special sealant (part No. 0471767) used to repair the leakage. We recommend replacing the O-rings on all three cavity plugs.
To replace the O-rings, proceed as follows:
1. Thoroughly clean the area around the cavity plug to prevent contaminating the hydraulic system.
2. Remove the cavity plug using a 1-1/2 in. wrench or socket.
3. Remove and discard the O-ring (Figure 2).
Figure 2--Cavity Plug O-Ring
4. Clean the threads on the plug and in the flow control valve body. Do not allow any contamination to enter the valve body or cavity plug.
5. Install a new O-ring on the cavity plug and apply a light coat of sealant to the threads.
6. Install the cavity plug into the valve body and tighten to 140 ft.-lbs. (190 N.m) using an accurate torque wrench. Allow the sealant to cure for 10-15 minutes before resuming operation.
If hydraulic fluid leakage is noted at the area around the cavity plug, the plug may be loose causing the O-ring to fail. The cavity plug is located on the bottom of the flow control valve body assembly. Figure 1 shows the cavity plug with the flow control valve body removed and inverted.
Figure 1--Cavity Plug
If necessary, contact Bucyrus Equipment Company Inc. (800-330-0857) to obtain replacement O-rings (part No. 3-916) and special sealant (part No. 0471767) used to repair the leakage. We recommend replacing the O-rings on all three cavity plugs.
To replace the O-rings, proceed as follows:
1. Thoroughly clean the area around the cavity plug to prevent contaminating the hydraulic system.
2. Remove the cavity plug using a 1-1/2 in. wrench or socket.
3. Remove and discard the O-ring (Figure 2).
Figure 2--Cavity Plug O-Ring
4. Clean the threads on the plug and in the flow control valve body. Do not allow any contamination to enter the valve body or cavity plug.
5. Install a new O-ring on the cavity plug and apply a light coat of sealant to the threads.
6. Install the cavity plug into the valve body and tighten to 140 ft.-lbs. (190 N.m) using an accurate torque wrench. Allow the sealant to cure for 10-15 minutes before resuming operation.
16
AFFECTED MODELS: SR, SRA AND AR SERIES HARVESTERS
The sprocket lugs on the rubber belts are reinforced with metal clips. Belt and sprocket damage will occur if any of the clips are excessively worn, damaged or missing. To prevent damage to the rubber belts and sprockets make sure that all of the clips are securely installed and in acceptable condition.
Periodically inspect the rubber belts on the rear conveyor. Worn clips are best seen looking at the underside of the belt. Replace any clips that are excessively worn, damaged or missing. Call Bucyrus Equipment Company (800-330-0857) for replacement clips and installation tool.
The sprocket lugs on the rubber belts are reinforced with metal clips. Belt and sprocket damage will occur if any of the clips are excessively worn, damaged or missing. To prevent damage to the rubber belts and sprockets make sure that all of the clips are securely installed and in acceptable condition.
Periodically inspect the rubber belts on the rear conveyor. Worn clips are best seen looking at the underside of the belt. Replace any clips that are excessively worn, damaged or missing. Call Bucyrus Equipment Company (800-330-0857) for replacement clips and installation tool.- Clips--part No. 04-149-01
- Installation tool--part No. TCI900
15
AFFECTED MODELS: SR, SRA AND AR SERIES HARVESTERS
The chop linkage is secured using 0.75 in. bolts. See Figure 1. These bolts must be sufficiently loose to allow the chop linkage to pivot without binding. Therefore, if the cutter heads are not running, the chop mechanism can leak downward until the chop blades are touching the ground.
The chop linkage is secured using 0.75 in. bolts. See Figure 1. These bolts must be sufficiently loose to allow the chop linkage to pivot without binding. Therefore, if the cutter heads are not running, the chop mechanism can leak downward until the chop blades are touching the ground.
Figure 1--Chop Linkage & Bellville
Washers
Washers
Bellville washers and 3/4-16 X 4.5 in. bolts are available to allow enough tension to be applied to the bolts to hold the chop mechanism in the up position. Call Bucyrus Equipment Co. (800-330-0857) to obtain the washers and bolts for this upgrade.
To perform this upgrade, remove the original nut and bolt. Install the fine-thread bolt making sure the flat washers are in place between the chop-off stationary frame and links. Install the Bellville washers with the concave sides facing together onto the bolt, then the nut and tighten it snug. The nuts should be just tight enough to hold the chop blades up, but still allow the chop mechanism to pivot smoothly without binding.
- Bellville Washers--part No. 0125805
- Bolts--3/4-16 X 4.5 in. (fine thread)
To perform this upgrade, remove the original nut and bolt. Install the fine-thread bolt making sure the flat washers are in place between the chop-off stationary frame and links. Install the Bellville washers with the concave sides facing together onto the bolt, then the nut and tighten it snug. The nuts should be just tight enough to hold the chop blades up, but still allow the chop mechanism to pivot smoothly without binding.