CRANE INSTALLATION SERVICE MANUAL 1400A
9-20 1-21-2019 Control # 104-07
A stability test must be performed on each completed unit to
determine the 85% tipping factor. Proceed as follows:
1. Put the test unit on a firm level surface. Place cribbing
under the outrigger floats if required.
2. With the boom in the rest, raise and level the machine on
the outriggers with all tires clear of the ground. See the
Operator’s Manual. Set the front jack (if equipped).
3. Loads listed in the Load Chart that are not in the shaded
area are limited by stability. To determine if the machine
is stable with an 85% tipping factor, it is necessary to lift
stability test loads at 1.176 times the rated load.
4. Two test loads are required to ensure the crane is stable
over both the sides and rear of the machine. Special
care must be taken in performing the stability test if the
crane is equipped with a jib. The stability test can be
performed with or without the jib stowed on the side of
the main boom. If the stability test is performed with the
jib stowed on the side of the main boom, adjust the
stability load as shown in the table below.
NOTE: Be sure the weights lifted are accurate. A 1%
increase in load weight can result in a 10%
increase in stability test weight required.
EXAMPLE 1: 14110A No Jib Stowed
Test Load #1
• Boom Length: 28.7 m (94 ft)
• Loaded Radius: 25.9 m (85 ft)
• 14110 capacity at:
- 25.9 m (85 ft) boom length
- 28.7 m (94 ft) radius
- 794 kg (1750 lb) per capacity chart
• Stability Test Load (no jib stowed):
- 1750 x 1.176 = 2058 lb*
- 794 x 1.176 = 934 kg*
Test Load #2
• Boom Length: 18.9 m (62 ft)
• Loaded Radius: 15.2 m (50 ft)
• 14110 capacity at
- 15.2 m (50 ft) radius
- 18.9 m (62 ft) boom length
- 3266 kg (7200 lb) weight per capacity chart
• Stability Test Load (no jib stowed):
- 7200 x 1.176 = 8467 lb*
- 3266 x 1.176=3841 kg*
EXAMPLE 2: 14110A WITH 30 - 54 ft JIB STOWED
Test Load #1
• Boom Length: 28.7 m (94 ft)
• Loaded Radius: 25.9 m (85 ft)
• 14110 capacity at:
- 25.9 m (85 ft) radius
- 28.7 m (94 ft) boom length
- 794 kg (1750 lb) per capacity chart
• 136 kg (300 lb) deduct for 30 - 54 ft jib stowed at 28.7 m
(94 ft) boom length.
• 112 kg (247 lb) added per the table to compensate for
the effects of the jib stowed on the main boom during the
stability test.
• Stability Test Load (30 - 54 ft jib stowed):
- (1750 -300 +247) x 1.176 = 1996 lb*
- (794 -136 +112) x 1.176 = 906 kg*
Test Load #2
• Boom Length: 18.9 m (62 ft)
• Loaded Radius: 15.2 m (50 ft)
• 14110 capacity at:
- 15.2 m (50 ft) radius
- 18.9 m (62 ft) boom length
DANGER
Loads used for stability tests put the crane at the tipping
point. Keep the load close to the ground. Control of boom
position is critical. Do not swing test loads out past the
rated radius. If the crane starts to tip and the boom angle
is too low, the crane will overturn.
Model Boom Length
Loaded
Radius
Add To Rated
Load When
Jib Stowed*
14127A
38.7 m (127 ft)
21.3 m (70 ft)
29.0 m (95 ft)
15.2 m (50 ft)
76.2 kg (168 lb)
84.8 kg (187 lb)
14110A
28.7 m (94 ft)
18.9 m (62 ft)
25.9 m (85 ft)
15.2 m (50 ft)
112.0 kg (247 lb)
117.9 kg (260 lb)
14100A
26.2 m (86 ft)
17.7 m (58 ft)
21.3 m (70 ft)
15.2 m (50 ft)
151.5 kg (334 lb)
175.5 kg (387 lb)
Fo
r
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