NATIONAL CRANE Published 9-26-2018 Control # 646-02 6-11
NTC55 OPERATOR MANUAL MAINTENANCE CHECKLIST
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 ±5 sec
Boom Extend/Retract Five Section
Extend (Angle 60°) ........................................................ 80 ±10 sec
Retract........................................................................... 80 ±10 sec
Outrigger Beam Extend ......................................................... 10 ±3 sec
Outrigger Beam Retract......................................................... 10 ±3 sec
Outrigger Jack Extend ........................................................... 10 ±3 sec
Outrigger Jack Retract........................................................... 10 ±3 sec
Counterweight
Weight #1 .............................................................................. 1,360 kg (3,000 lb)
Weight #2 .............................................................................. 567 kg (1,250 lb)
Weight #3 .............................................................................. 567 kg (1,250 lb)
Weight - Combined ................................................................ 2,494 kg (5,500 lb)
General
Capacity NTC55 .................................................................... 49.9 metric tons (55 tons) at 2.4 m (8 ft) radius
Overall Length ....................................................................... 12.0 m (39.4 ft), with 31 m (128 ft) Boom
Overall Width......................................................................... 2.6 m (101.6 in)
Overall Height........................................................................ 3.95 m (155.5 in)
Boom Length, 102 ft, 4 section .............................................. Retracted 9.95 m (31.3 ft), Extended 31.09 m (102 ft)
Boom Length, 128 ft, 5 section .............................................. Retracted 9.73 m (31.93 ft), Extended 39.0 m (128 ft)
Jib Length.............................................................................. Retracted 7.9 m (26 ft), Extended 13.7 m (45 ft)
Jib Offset ............................................................................... 0° and 30°
Machine Weight (without Chassis or Jib) NTC55 .................. 21,427 kg (47,238 lb)
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)
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