Double Wrench Method - JLG E450A Service And Maintenance Manual

Double Wrench Method

To prevent undesired hose or connector rotation, two
wrenches must be used; one torque wrench and one backup
wrench. If two wrenches are not used, inadvertent component
rotation may occur which absorbs torque and causes
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SECTION 5 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
improper joint load and leads to leaks. For hose connections,
the 'layline' printed on the hose is a good indicator of proper
hose installation. A twisted lay-line usually indicates the hose
is twisted. See Figure 5-12. for double wrench method require-
ments.
Figure 5-12. Double Wrench Method
5-51