5540F/YB5515 SERVICE MANUAL
1-14 Published 10-21-2010, Control# 198-04
WELD STUDS (TABLE 1-10)
Unless otherwise specified the following grade 2 torque
values (+/- 10%) apply.
Table 1-10
Weld Stud Torque Values
Hydraulic Fitting
F.F.F.T. METHOD (Flats from Finger Tight)
Manitowoc Cranes, Inc. recommends that the F.F.F.T.
tightening method described here be used when assembling
all hydraulic fittings. This method will minimize the risk of
fitting damage or failure due to under or overtightening.
It will also reduce the chance of a leaky connection which is
caused normally by different plating combinations of fittings.
This method is particularly useful when plating type of fitting
is unknown and during maintenance or repair when a joint
may be oily.
Follow these steps when tightening all fitting connections:
1. Make sure both threads and sealing surfaces are free of
burrs, nicks, scratches or any foreign particles.
2. Align tube or hose to the mating fitting and check to see
that the flare seats properly on the nose of the fitting.
3. Finger tighten the nut onto the fitting. If necessary, a
wrench should be used to seat the nut snugly against
the fitting. This is considered the “FINGER TIGHT”
condition.
4. Using a permanent-type ink marker, make a mark on
one of the flats of the nut and continue it onto the hex of
the static fitting or port
5. Tighten the joint by the number of flats (F.F.F.T.) as
specified in Table 1-11 and 1-12 for size and type of
fitting.
6. Optional for future tightening of the same connection.)
Extend the line from the nut at its new location onto the
hex of the static fitting or port (Figure 1-11).
37° Flared Steel Fitting - Tube or Hose to Fitting
1. Follow F.F.F.T. method, see F.F.F.T. METHOD (Flats
from Finger Tight).
Table 1-11
Reference Only
To Next Page
Loading...
Need help?
General
