Hydraulic Connection Specifications; O-Ring Fitting (Straight Thread); O-Ring Face Seal Connection; Flare Fitting - Farm King HS8525 Operator And Parts Manual

HYDRAULIC CONNECTION SPECIFICATIONS

O-Ring Fitting (Straight Thread)

Lubricate the O-ring before installing the fitting. Loosen
the jam nut and install the fitting. Tighten the jam nut until
the washer is tight against the surface.

O-ring Face Seal Connection

Table 5
O-ring Face Seal Tightening Torque
Tubeline O.D. Thread Size
1/4" 9/16" - 18
3/8" 11/16" - 16
1/2" 13/16" - 16
5/8"
3/4" 1-3/16" - 12
7/8" 1-3/16" - 12
1" 1-7/16" - 12
1-11/16" - 12
1-1/4"
1-1/2"
When the fitting is tightened, you can feel when the fitting
is tight to eliminate leakage caused by under or over
torqued fittings. Use petroleum jelly to hold the O-ring in
position until the fittings are assembled.

Flare Fitting

Table 6
Flare Fitting Tightening Torque
Tubeline O.D. Thread Size
1/4" 7/16" - 20
5/16"
3/8" 9/16" - 18
1/2"
5/8"
3/4" 1-1/16" - 12
7/8" 1-3/16" - 12
1" 1-5/16" - 12
1-1/4" 1-5/8" - 12
1-1/2" 1-7/8" - 12
2" 2-1/2" - 12
Tighten until the nut makes contact with the seat. Use the
chart Table 6 to find the correct tightness needed.
NOTE: If the fitting leaks, disconnect and inspect the
seat area for damage.
N•m (ft-lb)
13 (18)
22 (30)
40 (54)
1" - 14 60 (81)
84 (114)
98 (133)
118 (160)
154 (209)
2" - 12 163 (221)
N•m (ft-lb)
13 (18)
1/2" - 20 17 (23)
22 (30)
3/4" - 16 40 (54)
7/8" - 14 60 (81)
84 (114)
98 (133)
118 (160)
154 (209)
163 (221)
252 (342)
Specifications - High Speed Compact Disc

Port Seal (O-ring Boss) Fitting

Table 7
Port Seal And O-ring Boss Tightening Torque
Tubeline O.D. Thread Size
1/4" 7/16" - 20
3/8" 9/16" - 18
1/2"
5/8"
3/4" 1-1/16" - 12
7/8" 1-3/16" - 12
1" 1-5/16" - 12
1-1/8" 1-7/16" - 12
1-1/4" 1-5/8" - 12
NOTE: Port seal and nut, washer and O-ring (O-ring
Boss) fittings use the same tightening torque
valve chart.
If a torque wrench cannot be used, use the following
method.
Tighten the nut until it just makes metal to metal contact,
you can feel the resistance.
Tighten the nut with a wrench no more than one hex flat
maximum.
Do not over tighten the port seal fitting.
NOTE: If a torque wrench cannot be used, use the
hex flat tightening method as an approximate
guideline.
NOTE: Port seal fittings are not recommended in all
applications. Use O-ring boss fittings in these
applications.

Tubelines And Hoses

Replace any tubelines that are bent or flattened. They will
restrict flow, which will slow hydraulic action and cause
heat.
Replace hoses which show signs of wear, damage or
weather cracked rubber.
Always use two wrenches when loosening and tightening
hose or tubeline fittings.
N•m (ft-lb)
13 (18)
22 (30)
3/4" -1 6 40 (54)
7/8" - 14 60 (81)
84 (114)
98 (133)
118 (160)
154 (209)
163 (221)
165