Manitowoc 2250 Service And Maintenance Manual

Reference Only
HYDRAULIC AND AIR SYSTEMS 2250 SERVICE/MAINTENANCE MANUAL
2-8
Published 11-06-15, Control # 040-13
4. Tighten jam nut. When fitting is properly installed, O-ring
will completely fill seal cavity and washer will be tight
against spot face as shown in Figure 2-6
, View B.
Table 2-4
Straight Thread Leakage
ORS Connection
NOTE: ORS is the registered trade mark for a face-type
seal manufactured by Aeroquip Corporation.
1. Lubricate and install o-ring in adapter groove
(Figure 2-7
).
2. Lubricate threads. Tighten nut to torque value given in
Table 2-5
.
Table 2-5
ORS Assembly Torque
Table 2-6
ORS Leakage
Split Flange Connection
1. Lubricate and install o-ring in shoulder groove (see
Figure 2-8
).
2. Align shoulder with port and assemble flanges over
shoulder.
NOTE: Bolts used must be grade-5 or better. Grade-5 bolt
has three dashes in head.
3. Snug bolts in a diagonal manner (see Figure 2-8
) to 1/3
of torque given in Table 2-7
.
4. Repeat above step to 2/3 of final torque. Repeat above
step to final torque.
Table 2-7
Split Flange Assembly Torque
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
Nut Size
(inch across flats)
Fitting
Size
Torque
In-Lb N•m
5/8 -04 120 – 145 14 – 16
13/16 -06 203 – 245 23 – 28
15/16 -08 380 – 470 43 – 53
1-1/8 -10 550 – 680 62 – 77
1-3/8 -12 763 – 945 86 – 107
1-5/8 -16 1110 – 1260 125 – 142
1-7/8 -20 1500 – 1680 170 – 190
FIGURE 2-7
S105
O-Ring
Nut
Adapter
Causes Cures
Nut Loose Tighten to proper torque
O-ring cut Replace
O-ring wrong size Replace with proper size
Sealing surfaces gouged or
scratched
Repair/replace damaged
parts
Sealing surfaces dirty Clean and lubricate
A Dimension
inch
Flange
Size
Torque
in-lb N•m
Standard Pressure Series
1-1/2 -08 175 – 225 20 – 25
1-7/8 -12 225 – 350 25 – 40
2-1/16 -16 325 – 425 37 – 48
2-5/16 -20 425 – 550 48 – 62
2-3/4 -24 550 – 700 62 – 79
3-1/16 -32 650 – 800 73 – 90
High Pressure Series
FIGURE 2-8
S104
1
2
3
4
Flange
O-Ring
Port
Shoulder
Tube
S101
A
S102

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English