Manitowoc Published 05-26-17, Control # 238-02 2-23
MLC165-1 SERVICE/MAINTENANCE MANUAL HYDRAULIC SYSTEM
SAE Flare Connection
1. Tighten the nut finger-tight until the sealing surfaces
touch.
2. Mark a line (use felt pen or marker) on the adapter and
extend it onto the connector nut (Figure 2-23
, View A).
3. Using wrenches, tighten the connector nut the number
of flats shown in Table 2-9
.
4. Misalignment of the marks will show how much the nut
has been tightened, and best of all that it has been
tightened.
Table 2-9 SAE 37°Flare Tightening
Table 2-10 SAE 37° Flare Connection Repair
Figure 2-23. SAE Flare Connection
Adapter
Line
Connector
Nut
View A
Turn connector nut required
number of flats
View B
Connector Nut Size
Across Flats - inch (mm)
Fitting
Size
Adapter Flats
to Rotate
9/16 (14,3) -04 2-1/2
5/8 (15,9) -05 2-1/2
11/16 (17,5) -06 2
7/8 (22,2) -08 2
1 (24,5) -10 1-1/2 – 2
1-1/4 (31,8) -12 1
1-1/2 (38,1) -16 3/4 – 1
2 (50,8) -20 3/4 – 1
2-1/4 (57,2) -24 1/2 – 3/4
Causes Cures
Joint loose Tighten properly
Sealing surfaces dirty Clean
Sealing surfaces not
smooth (scratched or
gouged)
Replace the faulty parts
Sealing surfaces cracked Replace the faulty parts
SAE 45° parts used with
SAE 37° parts
Use only SAE 37° parts
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