Figure 3-37. Trip cable adjustment.
c. Build up cribbing equal to revolving frame height
3-39. Hook Roller Adjustment
under boom, and lower boom to rest on cribbing. This
a. Lower boom to near the horizontal position. This
will equalize weight of revolving frame on roller circle,
will put weight on rear hook rollers while both front hook
then adjust rear hook rollers in same manner as front
rollers are being adjusted.
hook rollers above.
Note. When replacing keeper plates, the lip of
(fig. 3-38), then rotate eccentric shafts until both rollers
are snug against bottom of roller path. A maximum of
front hook roller keeper plate must be between
1/16 inch clearance is allowed between hook rollers and
flange of eccentric shaft and hook roller mounting
roller path. When adjustment is correct, install keeper