USE OF LABOR-SAVING APPARATUS 



71 



pump equipment mounted on the truck is desirable. As soon as the 

 gang arrives at a wet manhole, the pump if promptly applied will 

 remove the water in the few minutes during which preparations are 

 being made for placing the cable, so that ordinarily the gang is not 

 delayed in the least by the water. 



Fig. 19 — Centrifugal Pump Mounted on Underground Cable Placing Truck 



There are several points in favor of locating the pump on the run- 

 ning board as shown in Fig. 19 rather than in the body at the rear of 

 the cab as has been the usual practice in the past. With the running 

 board installation the water is not carried up into the truck body 

 where it has a tendency to get into the tool and material boxes and 

 equipment and also to cause deterioration of the body. In addition 

 space is economized and the pump is located considerably lower than 

 would otherwise be the case, thus resulting in a reduction of the 

 suction lift for the water between its level in the manhole and the 

 pump impeller. 



Air Compressors and Compressed Air Tools 



Of the many applications for mechanical equipment to offset the 

 scarcity and high cost of certain types of labor such as for excavating, 

 etc., the use of air compressors and compressed air tools is of prime 

 importance in the outside plant construction work. Through special 

 adaptations to meet each peculialr condition, this class of labor saving 

 equipment has been made available for use on such jobs as the opening 



