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.