If the boom does not lower, the accumulator is empty. Use one of the following methods to lower the boom.
Lowering the Boom Manually
 |
Be sure no one is under or near the implements before manually lowering the boom. Keep all personnel away from the boom drop area when lowering the boom with the engine stopped in order to avoid possible personal injury |
 |
When you must manually lower the boom due to engine shutdown, use the following procedure.
Relieve the pressure in the hydraulic system before manually lowering the boom. Move the hydraulic lockout control to the UNLOCKED position. Move the travel levers/pedals forward and backward in order to relieve the pressure.
- Slowly loosen fill/vent plug (1) on the top of the hydraulic tank until internal pressure in the hydraulic tank has been completely relieved. Remove fill/vent plug (1) .
 | |
| Illustration 1 | g00683244 |
(1) Fill/vent plug (2) Bolts (3) Washers (4) Cover | |
- Remove four bolts (2), four washers (3), and cover (4) from the top of the hydraulic tank.
- Loosen clamp (6) and disconnect hose (5) from the side of the hydraulic tank.
 | |
| Illustration 2 | g00683247 |
(5) Hose (6) Clamp | |
- Connect an end of hose (5) to screw (7 ). Put the other end of hose (5) into the filler plug opening.
 | |
| Illustration 3 | g00683250 |
(5) Hose (7) Screw | |
- Slowly loosen screw (7) by a maximum of 1/2 turn. This allows the hydraulic oil in the boom circuit to drain into the hydraulic tank. The boom will now start to lower.
- Make sure that the implement has lowered all the way to the ground. Tighten screw (7) to a torque of 13 ± 2 N·m (9 ± 1 lb ft).
- Disconnect hose (5) from screw (7). Do not allow the oil that is contained in hose (5) to spill.
- Connect hose (5) to the original position on the hydraulic tank and install fill/vent plug (4) securely.
After completion of the manual boom lowering, make necessary repairs before you operate the machine again.