Manitowoc 16000 User Manual

Reference Only
HYDRAULIC SYSTEM 16000 SERVICE/MAINTENANCE MANUAL
2-10
Published 05-03-17, Control # 228-03
SAE Straight Thread Connection
This type of connection leaks most often because the jam
nut and washer are not backed up before assembly.
When the jam nut and washer are not backed up, there is not
enough room for the o-ring when the squeeze takes place
and the washer cannot seat properly as shown in Figure 2-7
,
View A. The compressed o-ring between the washer and the
spot face will cold flow out of compression, causing the fitting
to loosen and leak as shown in Figure 2-7
, View B.
Tighten SAE straight thread connections using the following
procedure:
1. Back off jam nut and washer to the end of the smooth
portion on the fitting as shown in Figure 2-8
, View A.
2. Be sure to lubricate the o-ring with clean oil.
3. Thread fitting into the port until the washer bottoms
against the spot face as shown in Figure 2-8
, View B.
NOTE: If an elbow is being used, back it out as necessary
to align it with hose.
4. Tighten the jam nut. When the fitting is properly installed,
the o-ring will completely fill the seal cavity and the
washer will be tight against the spot face as shown in
Figure 2-8
, View B.
Table 2-3
Straight Thread Fitting Troubleshooting
View A
O-Ring
Washer
Jam Nu
t
FIGURE 2-7
Washer cannot seat properly on
spot face. Compressed rubber
between washer and spot face
will cold flow out of compression,
causing fitting to loosen and leak.
When jam nut and washer
are not backed up, there is
not enough room for O-ring
when squeeze takes place.
View BView A
View A
View B
Washer
Jam Nu
t
FIGURE 2-8
Nut and washer backed
up to end of smooth
portion on fitting.
S106
Spot Face
O-Ring
Causes Cures
Jam nut and washer not backed
up at assembly, causing O-ring
to be pinched.
Replace O-ring and
tighten fitting properly.
O-ring cut. Replace.
O-ring wrong size. Replace with proper size.
Sealing surfaces gouged or
scratched.
Repair if possible or
replace damaged parts.
Sealing surfaces dirty. Clean and lubricate.

Manitowoc 16000 Specifications

General

Brand	Manitowoc
Model	16000
Category	Construction Equipment
Language	English