Manitowoc National Crane 500E2 Service Manual

National Crane Published 08/16/19 Control # 112-05 9-31
500E2 SERVICE MANUAL CRANE INSTALLATION
9
Counterweighting Methods
Two methods of counterweighting may be used:
a. a heavy front bumper and concrete in the bed or
b. concrete in the bed only.
The easiest and most economical method is usually
concrete in bed only. The amount of counterweight required
will be 1132 + 918 = 2050 pounds (513 + 417 = 930 kg). Use
2350 pounds (1066 kg) of concrete poured in the front of the
bed. See “Counterweighting for 180° Stability” in this section
Determine axle weights added by the counterweight by using
the same method as used before. Figure the center of the
counterweight to determine where the weight acts. If the
counterweight is oddly shaped, figure the center and weight
of each regular shape. Weights ahead of the front axle
require using a negative (-) distance in calculations.
The rear axle weight is 284 lbs (130 kg) heavier than required and the front axle weight is 16 lbs (6 kg) heavier than required.
Rear Axle Weight Front Axle Weight
1150 lb (520 kg) Bed Concrete
Required Counterweight
Difference
(2350) - 1416 = 934 lb
1132 lb
(2350) x 142.8
=
1416 lb
237
(1066) x 363
=
634 kg
602
513 kg
284 lb
130 kg
(1066) - 643 = 423 lb
918 lb
417 kg
16 lb
6 kg
142 in (363 cm)
2350 lb (1060 kg)
Concrete
237 in (602 cm)
0 in
69 in
(175 cm)
53.8 in
(137 cm)
20 in
(51 cm)

Manitowoc National Crane 500E2 Specifications

General

Brand	Manitowoc
Model	National Crane 500E2
Category	Construction Equipment
Language	English