at a subterranean location in many applications obstacles in the area of the job site may prevent the boom 24 from being aligned with the tunnel 98 or other excavation that is the subject of the work in the event that this type of situation arises the boom can be placed at an angle to the tunnel 98 and the winch frame 74 can be pivoted to one side or the other about the pivot axis of the pin 90 thus allowing the cable 86 to be positioned in line with the tunnel 98 to facilitate pulling of the pipe 96 or other structure through the tunnel the pivotal mounting of the winch thus enhances the versatility of the equipment and increases its ability to operate in the presence of obstacles of the type that are often encountered in excavating work and pipeline work when the winch attachment 46 is no longer needed it can be detached from the backhoe 10 by removing the pin 63 and releasing the quick disconnect couplings 44 the bucket 36 can then be installed on the mounting bracket 34 and connected physically by means of the pin 63 and hydraulically by means of the couplings 44 an alternative arrangement involves mounting the winch on the back end of the boom with the winch axle 78 in a vertical orientation then the winch cable 86 can be angled to either side directly from the winch drum this arrangement avoids the need to provide a swivel mount for the winch and is preferred in some applications from the foregoing it will be seen that this.