OPERATOR AND FIELD MAINTENANCE
This work package provides general torque limits for screws used on the M917 Dump Truck Body. Special
torque limits are indicated in the maintenance procedures for applicable components. The general torque limits
in this WP shall be used when specific torque limits are not indicated in the maintenance procedure. These
general torque limits cannot be applied to screws that retain rubber components. The rubber components will
be damaged before the correct torque limit is reached. If a special torque limit is not given in the maintenance
instructions, tighten the screw or nut until it touches the metal bracket, then tighten it one complete revolution.
Table 1 lists dry torque limits. Dry torque limits are used on screws that do not have lubricants applied to the
threads. Table 2 lists wet torque limits. Wet torque limits are used on screws that have high pressure lubricants
applied to the threads. For metric fasteners dry torque, refer to table 3, and for metric fasteners wet torque,
refer to table 4 for torque limit requirements.
HOW TO USE TORQUE LIMITS
1. Measure the diameter of the screw you are installing (Figure 1).
Figure 1. Measuring Screw Diameter.
Perform step 2 for standard screws only. To determine if screw is
standard or metric, check capscrew head and refer to the following
Manufacturer's marks may vary.
Metric screws can be three grades: 8.8,
Screws shown are all SAE Grade 5 (3-line).
10.9, and 12.9. Grades and manufacturer's
marks appear on screw head.
Figure 2. Capscrew Head Markings.