Manitowoc 1400A User Manual

National Crane 1-21-2019 Control # 104-07 4-23
1400A SERVICE MANUAL BOOM MAINTENANCE
4
Nut configuration (see Figure 9) will be First Nut
(ADJUSTMENT) and Second Nut (TORQUED).
NOTE: (OPTION 2) method used ONLY when space
constraints prevent OPTION 1 usage.
When tightening/loosening the first (adjustment) nuts on
cables, secure cable using the wrench flats at the front of the
cable ends to prevent cable twist.
After the cable adjustment procedure is completed for the
entire boom assembly. The second (torqued) nut must be
installed on all retract and extend cables.
The second nut should be hand tightened until it comes in
contact with the back of the first nut.
Hold the first (adjustment) nut stationary and a torque
wrench to tighten the second (torqued) nut against the first
(adjustment) nut to the values indicated in TORQUE
VALUES for Second Nut:
Third (positive lock) nut installation is to be placed on each of
the extend cables. The retract cables do not require the third
(positive lock) nut.
The third nut should be hand tightened until the tapped hole
for the set screw is tangent to the end face of the wrench flat.
Install set screw into Third nut and tighten.
(OPTION 2) method used ONLY when space constraints
prevent OPTION 1 usage (see Figure 9).
TORQUE VALUES for Second Nut:
Inch Series with Coarse Threads (UNC)
Metric Series with Coarse Threads
Cable end
Thread Size
Minimum
Nut
Strength
GRADE
Nut Type
TORQUE
ft lbf
1/2-13 SAE 2
Hex Jam
(HALF)
12
5/8-11 SAE 2
Hex Jam
(HALF)
31
3/4-10 SAE 2
Hex Jam
(HALF)
47
7/8-9 SAE 2
Hex Jam
(HALF)
63
1-8 SAE 2
Hex Jam
(HALF)
199
1 ¼-7 SAE 2
Hex Jam
(HALF)
203
1 ½-6 SAE 5
Hex Jam
(FULL)
250
1 ¾-5 ASTM B
Hex Jam
(FULL)
250
Cable end
Thread Size
Minimum
Nut
Property
Class
Nut Type
TORQUE
Nm
M16x2 5
Hex Jam
(THIN)
26
M20x2.5 5
Hex Jam
(THIN)
66
Fo
r
Reference
Only

Manitowoc 1400A Specifications

General

Brand	Manitowoc
Model	1400A
Category	Construction Equipment
Language	English