Manitowoc Grove CD3340B User Manual

INTRODUCTION CD3340B/YB4411
1-14
Published 04/07/2015 Control # 569-00
HYDRAULIC FITTING F.F.F.T. METHOD
(FLATS FROM FINGER TIGHT)
Manitowoc, 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 (Figure 1-7.)
5. Tighten the joint by the number of flats (F.F.F.T.) as
specified in Table 1-11 and Table 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 1-7).
37°Flared Steel Fitting - Tube or Hose to
Fitting (Table 1-11)
See Hydraulic Fitting F.F.F.T. Method in this section.
Adjustable Straight Thread O-ring Fitting -
Fitting to Port (Table 1-6)
1. Inspect both mating parts for burrs, nicks, scratches, or
foreign particles.
2. Lubricate O-ring with a light coat of clean oil
(Figure 1-8 A).
3. Back off locknut as far as possible (Figure 1-8 A).
4. Screw fitting into port by hand until the backup washer
contacts face of port and is pushed all the way towards
the locknut (Figure 1-8 B & C).
5. To orientate the fitting, unscrew the fitting the required
amount, but not more than one full turn (Figure 1-8 D).
a0027
FIGURE 1-7
a0028
Table 1-11
a0029
Table 1-12
Reference Only

Manitowoc Grove CD3340B Specifications

General

Brand	Manitowoc
Model	Grove CD3340B
Category	Construction Equipment
Language	English