Manitowoc National Crane NBT50 Series - Counterweight; General

NATIONAL CRANE Published 03-23-2018 Control # 243-14 6-11
NBT50 OPERATOR MANUAL MAINTENANCE CHECKLIST
6
Crane Operating Speeds
(Performance based on full governed RPM and 100°F (37.8°C) hydraulic reservoir temperature.)
Rotation 360°......................................................................... 30 ± 5 sec (1.8 ± 0.2 rpm) Adjustment Knob Closed
Boom up -10° to 80° .............................................................. 27 ± 5 sec
Boom Down 80° to -10° ......................................................... 32 sec ± 5 sec
Boom Extend/Retract Four Section
Extend (Angle 60°) ........................................................ 90 sec ±10 sec
Retract (Angle 60°)........................................................ 90 sec ±10 sec
Boom Extend/Retract Five Section
Extend (Angle 60°) ........................................................ 80 sec ±10 sec
Retract (Angle 60°)........................................................ 80 sec ±10 sec
Outrigger Beam Extend ......................................................... 10 sec ±3 sec
Outrigger Beam Retract......................................................... 10 sec ±3 sec
Outrigger Jack Extend ........................................................... 10 sec ±3 sec
Outrigger Jack Retract........................................................... 10 sec ±3 sec
Counterweight
Weight NBT50 ....................................................................... 3,200 lb (1,452 kg)
Weight NBT55 ....................................................................... 6,200 lb (2,812 kg)
General
Capacity NBT50 .................................................................... 50 tons (45.5 metric tons) at 8 ft (2.4 m) radius
NBT55 ................................................................... 55 tons (49.9 metric tons) at 8 ft (2.4 m) radius
Overall Length ....................................................................... 39.4 ft (12.0 m), with 102 ft (31 m) Boom
Overall width.......................................................................... 101.6 in (2.6 m)
Overall Height........................................................................ 155.5 in (3.95 m)
Boom Length, 102 ft, 4 section .............................................. Retracted 31.3 ft (9.95 m), Extended 102 ft (31.09m)
Boom Length, 128 ft, 5 section .............................................. Retracted 31.93 ft (9.73 m), Extended 128 ft (39.0 m)
Jib Length.............................................................................. Retracted 26 ft (7.9 m), Extended 45 ft (13.7 m)
Jib Offset ............................................................................... 0° and 30°
Machine Weight (without Chassis or Jib) NBT50................... 43,990 lbs (19,954 kg)
NBT55 .................. 46,990 lbs (21, 314 kg)
Line Speed (no load at high engine idle speed)
Layer Low Speed m/min (ft/min) High Speed m/min (ft/min)
1 43.9 (144) 87.5 (287)
2 48.5 (159) 97.2 (319)
3 53.3 (175) 107.0 (351)
4 58.2 (191) 116.7 (383)
5 63.1 (207) 126.5 (415)