Manitowoc National Crane NBT50 Series User Manual

MAINTENANCE CHECKLIST OPERATOR MANUAL NBT50
6-10 Published 03-23-2018 Control # 243-14
SPECIFICATIONS
Hydraulic
Hydraulic Pump..................................................................... 75.5 gpm () at 2200 rpm, Variable displacement, axial
piston with load sense
Hydraulic Pump Displacement .............................................. 7.93 in
3
/rev (130 cc/rev)
Pump Max Pressure ....................................................... 4900 psi (338 bar)
Load Sense Relief Valve................................................. 4663 psi (322 bar)
Pump Load Sense Margin .............................................. 363 psi (25 bar)
Boom Up ............................................................................... 48 gpm at 4061 psi (182 l/min at 280 bar)
Boom Down........................................................................... 19 gpm at 2031 psi (72 l/min at 140 bar)
Telescope Extend ................................................................. 50 gpm at 2538 psi (189 l/min at 175 bar)
Telescope Retract.................................................................. 15 gpm at 2031 psi (57 l/min at 140 bar)
Outrigger Extend ................................................................... 3000 psi (210 bar)
Outrigger Retract................................................................... 1200 psi (80 bar)
Hoist System ......................................................................... 35 gpm at 5000 psi (132 l/min at 345 bar)
Swing .................................................................................... 23 gpm at 3000 psi (87 l/min at 205 bar)
Swing Park Brake.................................................................. Hydraulic released disc, released at 175 psi (12 bar)
Cab Air Conditioner ............................................................... 8 gpm at 1450 psi
Reservoir Capacity ................................................................ 102 gal (386 l)
Reservoir Return Filter .......................................................... 5 micron
Reservoir Suction Filter ......................................................... 250 micron
Air Conditioner
Air Conditioner Hydraulic System.......................................... 3500 (+/-100) psi
Minimum Evacuation Time .................................................... 30 minutes
Refrigerant Charge Levels .................................................... 2.0 pounds (+/- 0.5 Ounce)
Additional Pag Oil Required Above 6 ounces in Compressor 4.0 ounces
Hoist System
Wire Rope:
Length ........................................................................... 450 ft (137 m)
Diameter (Rotation Resistant)....................................... 5/8 in. (16 mm)
Nominal Breaking Strength ........................................... 56,420 lb. (25,592 kg)
Operating Pressure ............................................................... 5000 psi (345 bar)
Flow....................................................................................... 35 gpm (132.5 l/min)
Gearbox Capacity.................................................................. 3.5 qt (3.31 l)
Brake Capacity ...................................................................... 1/4 qt (.236 l)
Hoist Line Pull/Layer
Layer Low Speed kN (lb) High Speed kN (lb)
1 66.7 (15,000) 33.4 (7,516)
2 60.2 (13,529) 30.1 (6,765)
3 54.7 (12.299) 27.4 (6,150)
4 50.2 (11,275) 25.1 (5,637)
5 46.3 (10,407) 23.1 (5,204)

Manitowoc National Crane NBT50 Series Specifications

General

Brand	Manitowoc
Model	National Crane NBT50 Series
Category	Construction Equipment
Language	English