BOOM MLC650 SERVICE/MAINTENANCE MANUAL
4-14
Published 09-09-16, Control # 229-09
Straightness
See Figure 4-13 for the following procedure.
1. Stretch a line (string or wire) from the pin storage hole at
one end of the strap.
2. Stretch the line as tight as possible and tie it off at the
other end.
3. Mark the strap’s centerline. Do not use a center punch!
4. If the string does not align with the centerline, measure
the distance from the centerline to the line.
If the deviation from straight is greater than the maximum
allowed in Table 4-2
, remove the strap from service.
Table 4-2
. Strap Straightness
Flatness
See Figure 4-14 for the following procedure.
1. Lay the strap on a flat surface. Do not put the strap on
blocks. This may cause the strap to sag.
2. Stretch a line (string or wire) across the top surface of
the strap from the pin storage hole at one end of the
strap.
3. Stretch the line as tight as possible and tie it off at the
other end.
4. Verify that the line touches the top surface of the strap at
all points along its length.
5. If the string does not touch the strap, measure the
distance from the line to the strap.
If the deviation from flat is greater than the maximum
allowed in Table 4-3
, remove the strap from service.
6. Remove the line. Turn the strap over.
7. Repeat step 1
through step 5 above.
Table 4-3.Strap Flatness
Strap Length
(L)
Maximum Deviation
Allowed
1,5 to <3,0 m (5 to <10 ft) 1,5 mm (0.060 in)
3,0 to <6,1 m (10 to <20 ft) 3,2 mm (0.125 in)
6,1 to <9,1 m (20 to <30 ft)
6,4 mm (0.250 in)
9,1 to <12,2 m (30 to <40 ft) 9,5 mm (0.375 in)
12,2 to <15,2 m (40 to <50 ft) 12,7 mm (0.50 in)
< = less than
Pin Storage
Hole (typical)
Centerline
String
Deviation
from Straight
A1086
Straightness (gradual
or sweeping bend)
FIGURE 4-13
Strap Length
(L)
m (ft)
Maximum Deviation Allowed
25,4 to <50,8 mm
(1 to <2 in) Thick
50,8 to <101,6 mm
(2 to <4 in) Thick
<0,9 (<3) 4,3 mm (0.17 in) 12,7 mm (0.50 in)
0,9 to <1,2
(3 to <4)
15,9 mm (0.63 in) 14,3 mm (0.56 in)
1,2 to <1,5
(4 to <5)
19,1 mm (0.75 in) 17,8 mm (0.70 in)
1,5 to <1,8
(5 to <6)
20,6 mm (0.80 in) 19,1 mm (0.75 in)
1,8 to <2,1
(6 to <7)
22,2 mm (0.88 in) 19,1 mm (0.75 in)
2,1 to <2,4
(7 to <8)
23,8 mm (0.94 in) 19,1 mm (0.75 in)
2,4 to <2,7
(8 to <9)
25,4 mm (1.0 in) 19,1 mm (0.75 in)
2,7 to <3,0
(9 to <10
25,4 mm (1.0 in) 22,2 mm (0.88 in)
3,0 to <3,7
(10 to <12)
25,4 mm (1.0 in) 25,4 mm (1.0 in)
≥3,7 (≥12)
Deviation not to exceed 25,4 mm (1 in)
in any 3,7 m (12 ft) length of strap
< = less than
≥ = equal to or greater than
Distance Between
Line and Strap
Line
A1086
Flatness (includes twisted straps)
FIGURE 4-14
To Next Page
Loading...
Need help?
General
