Grain Systems Bucket Elevtors, Conveyors, Series II Sweeps PNEG-1597 - Manual (Page 19)

4. Assembly
PNEG-1597 Sweep Tractor and Control Panel Assembly Instructions 19
20. Install the top chain guard assembly to the tractor frame using four (4) 3/8"-16 x 1" flange bolts.
Slide the bottom chain guard assembly through the slot on the top chain guard and secure it with a
3/8"-16 x 3/4" flange bolt.
(See Figure 4J.)
Figure 4J