EMERGENCY LOAD LOWERING PROCEDURE

EMERGENCY LOAD LOWERING PROCEDURE - cont - TM-5-3810-306-10_80

TM-5-3810-306-10 Container Crane 40-Ton Rough Terrain Model RTB75CC Manual
Page Navigation
67

TM 5-3810-306-10 c. Connect 38-foot long hose (with couplings on both ends) to quick coupler on hand pump. This is the hand pump pressure hose. 2. Lower load. a. Check to make sure that load can be lowered without contacting extended outrigger or crane carrier. If necessary, retract boom, (step 3) or rotate boom (step 5) enough to assure safe load lowering. b. Loop hand pump pressure hose out from under hydraulic tank cover and carry loose end up onto superstructure to hoist (main or auxiliary as applicable). c. Uncouple hoist brake release quick coupler of hoist supporting load. d. Install loose end of hand pump pressure hose to half of quick coupler leading to hoist brake. e. Pump hand pump lever. By pumping the handle, hydraulic pressure is applied to the hoist brake, releasing the brake and slowly lowering the load. f. Disconnect hand pump pressure line and reconnect hoist brake release quick coupler after load has been lowered to ground. 3. Retract boom. NOTE Retracting the boom is a two person operation. a. Carry loose end of hand pump pressure line onto superstructure. b. Open cover on control valve compartment (behind cab). c. Locate tele-rear steer-lift valve bank (center of control valve compartment). d. Remove dust cover on male coupler installed on inlet section of valve bank. Connect hand pump pressure hose at coupler. e. Instruct operator in cab to pull back on TELE control lever. Hold lever in this position. f. Pump hand pump lever. By pumping the handle, hydraulic pressure is applied to the telescope cylinder control valve causing the boom telescope section to slowly retract. g. Return TELE control lever to neutral position after boom has been retracted. h. Disconnect hand pump pressure hose at control valve bank and install dust cap on male coupling. 4. Lower boom. NOTE If transporting crane, do not lower boom beyond horizontal. a. Carry bleed-down hose (12-foot long hose with only one coupling) onto superstructure. b. Ensure that lift bleed-down valve is in OFF position. c. Remove dust cover on male coupler on bleed- down valve. 2-55

Privacy Statement
Press Release
Contact