Yetter 3000 Series Viper II Fertilizer Coulter - Manual (Page 6)

6
BOLT TORQUE
Mounting bolts and hardware
Before operating the Viper opener for the first time, check to be sure that all hardware is
tight. Check all hardware again after approximately 50 hours of operation and at the
beginning of each planting season.
All hardware used on the Viper opener is Grade 5 unless otherwise noted. Grade 5 cap
screws are marked with three radial lines on the head. If hardware must be replaced, be
sure to replace it with hardware of equal size, strength and thread type. Refer to the
torque values chart when tightening hardware.
Important: Over tightening hardware can cause as much damage as when under
tightening. Tightening hardware beyond the recommended range can
reduce its shock load capacity.
The chart below is a guide for proper torque. Use it unless a specified torque is called out
elsewhere in the manual.
Torque is the force you apply to the wrench handle or the cheater bar, times the length of the
handle or bar.
Use a torque wrench whenever possible.
The following table shows torque in ft. lbs. for coarse thread hardware.
Lubricate all bearings and moving parts as assembled and make certain that they work freely.
WARNING: Never work around the toolbar/implement while in a raised position without using safety
lockups.
CAUTION: The Viper opener and its attachments are very heavy. Pay extra attention to lifting techniques
while handling and or maneuvering the opener during assembly. Failure to do so may lead to
personal injury.