TB 9-2320-279-13&P-4
0027
3. Check if fifth wheel is properly lubricated.
4. If fifth wheel is not properly lubricated, lubricate fifth wheel with GAA. (WP 0038)
CONDITION/INDICATION
Is fifth wheel properly lubricated and free from debris?
DECISION
No - Test 4 - Does fifth wheel unlock when disconnecting trailer?
Yes - Test 2 - Do fifth wheel primary and secondary release handles operate without binding?
TEST 2 - Do fifth wheel primary and secondary release handles operate without binding?
CAUTION
Ensure kingpin jaws stay open when primary lock release handle is in locked position.
Failure to comply may result in damage to fifth wheel.
1. Operate fifth wheel primary and secondary release handles. Check if release handles operate over their full
range of motion without binding. (WP 0013)
FIFTH
WHEEL
TYPICAL
TRAILER
FIFTH WHEEL
FIFTH WHEEL
SECONDARY LOCK
PRIMARY LOCK
RELEASE HANDLE
RELEASE HANDLE
Figure 2.
CONDITION/INDICATION
Do fifth wheel primary and secondary release handles operate without binding?
DECISION
No - Replace fifth wheel. (WP 0052)Test 4 - Does fifth wheel unlock when disconnecting trailer?
Yes - Test 3 - Does fifth wheel unlock when disconnecting trailer?
