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ROAD and WORKSHOP ' II y andyman
Page 69
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Making Light Work of a Heavy Job
A HEAVY AND THANKLESS TASK for all engaged in vehicle repair, is any work connected with the rear bogie, road see-ings and brackets. Countless hours can be wasted where a set of " U " bolt nuts or other nuts in that area are to be shifted, With salt-strewn roads in winter, nuts become almot welded on, and on the Leyland Octopus bogie, for instance, four men can be involved for several hours on the work of removal; one man to offer up and hold a heavy ring spanner, and two or three More heaving on a rope attached to the key, using and needing brute force to free the nuts.
With such a labour cost building up, the common-sense approach would be to use the oxy cutter, Once it was found that things were near impossible. Yet there are many, many occasions when replacement " U " bolts are not in stock, or no nearer than 30 miles of the job. Or it could be a rushed night job with
a very tight loading or delivery deadline. During the past year, a new impact wrench was loaned by the IngersollRand Co.. and given a nine-day test by the writer.
The results were really and truly amazing. The tool in question was the Ingersoll-Rand Model 34U—it is electrically driven and compact enough to operate below the underslung road springs of most bogies on level ground. Furthermore it does not shock the operator. Brief details -are: length . overall, 14-125 in.: free speed, 800 r.p.m.; impacts per minute. 900: bolt capacity, 1.25 in, clia.: torque range, 450 to 750 lb. ft. The nine-day test proved the tool to he just as versatile and tough as described.
As stated, three or four skilled men can be tied up and hours lost, with delay to traffic during many difficult spring jobs. yet when using the impact wrench the job becomes almost stupidly simple. The following times were taken by the
writer when using the tool to disconnect a complete double-drive rear bogie: bogie' to road spring nuts, eight in all, removed in 11.5 minutes (and these springs had served 13 months, including winter time); all bogie to chassis nuts in 15 minutes (no assistance needed) and the lower bogie assembly was free. Other labour meanwhile had disconnected prop, shafts, brake connections and torsion bars and the complete bogie was free, to roll clear of the chassis in just over the half-hour. This task could take three or more hours for several men if nuts were seized. With the bogie rolled clear .of the vehicle, all four pairs of road wheels . were off the hubs in six minutes, and this by one operator only. Again at assembly a similar time was achieved, with the added blessing that after road test, a nip-up right round the bogie was complete in 10.5 minutes, Being electrically driven, and in not being tied to an air compressor, the tool can be taken anywhere where there is a 250 V supply: the sockets, extensions and unisjoints arc 1 in, drive.