Table 4-4. Unit Troubleshooting. - Continued
WINCH DOES NOT OPERATE - Continued
Test winch for internal damage.
Disconnect lower hose from winch, momentarily position control valve to PAY OUT, and
check for oil flow.
If there is no oil flow, refer to Step 4. If oil flow is present, reconnect lower hose and
disconnect upper hose. Momentarily position control valve to PAY OUT.
If oil flow is present, and winch operates, refer to Step 4.
If no oil flow is present, winch is faulty. Notify direct support maintenance personnel.
Test for faulty single overcenter valve. Disconnect line from tee at valve, momentarily position
control valve to PAY OUT, and check for oil flow.
If no oil flow is present, replace single overcenter valve.
If oil flow is present, reconnect line, then disconnect return line (V) from valve.
Momentarily position control valve to PAY OUT and check for oil flow.
If no oil flow is present, single overcenter valve is faulty.
Replace faulty single overcenter valve (FIGURE 4-16).
CABLE TENSIONER INOPERATIVE, (MODEL RBT)
When disconnecting any hydraulic line, open line slowly and protect face, as hydraulic oil may spray out
due to residual pressure in system.
Inspect hydraulic lines and hoses for external damage and security.
Replace tubes or hoses that are dented, pinched, crimped, or ruptured.
Check adjustment and sheaves for binding and ensure winch is operating.
Adjust cable tensioner.