This work package provides general torque limits for screws and nuts used on the 7 1/2 Ton Crane. Special torque
limits are indicated in the maintenance procedures for applicable components. General torque limits in this work
package shall be used when special torque limits are not indicated in the maintenance procedures.
Table 1 lists dry torque limits. Dry torque limits are used on screws that have not had lubricants applied to the threads.
Table 2 lists wet torque limits. Wet torque limits are used on screws that have had lubricants applied to the threads.
Unless the maintenance procedure indicated otherwise, lubricate threads of screws with oil (OE/HDO-10 or OEA).
When tightening screws to torque limits of 30 ft-lb (41 N·m) and above, use the torque sequence for the component
specified in the maintenance procedures or the general circular or straight sequences. Tighten screws to 70 percent
of their final value, then repeat the pattern until the final value is reached.
HOW TO USE TORQUE LIMIT TABLES
1. Measure the diameter of the screw being installed.
2. Count the number of threads in 1 inch (2.5 cm) of screw length.
3. Under the SIZE heading in Tables 1 or 2, look down the left-hand column to find the diameter of the screw
being installed, measure in Step 1. There are usually two listings.
4. In the right-hand column under the SIZE heading, find the number of threads per inch counted in Step 2.
5. To find the grade of screw being installed, match the marking on the head of the screw being installed with
the correct picture in SCREW MARKINGS on Tables 1 and 2.
6. Look down the SAE GRADE column in the TORQUE column in Tables 1 or 2 to find the correct torque limit
for the screw being installed.
· When installing capscrews, always ensure they are replaced in their proper locations.
· When replacing capscrews or nuts, always use a new capscrew or nut of the same size
· DO NOT use standard torque chart values if a specific torque is referenced in the
· All torque values listed in this manual are dry torques. Dry hardware is defined as
hardware as received from supply without additional lubricants being applied.
· Failure to follow these cautions may result in damage to equipment.
The 7 1/2 Ton Crane uses both English and Metric Dimensions.