Installing Hydraulic Hoses And Tubes (O-Ring Face Seal Fittings) - Toro Reelmaster 3100-D Service Manual

Installing Hydraulic Hoses and Tubes (O-Ring Face Seal Fittings)

Hydraulic System: General Information
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1. Tube or hose
2.
1. Ensure that all the threads, the sealing surfaces of the hose/tube, and the
fitting are free of burrs, nicks, scratches, or unwanted material.
2. To help prevent a hydraulic leak, replace the face seal O-ring when you open
the connection. Ensure that the O-ring is installed and correctly seated in the
groove of the fitting. Lightly lubricate the O-ring with clean hydraulic fluid.
3. Align the hose/tube against the body of the fitting so that the flat face of the
hose/tube sleeve fully touches the O-ring in the fitting
4. Use your hand to thread the swivel nut onto the fitting. While you hold the
hose/tube in alignment with a wrench, use a torque wrench to tighten the
swivel nut to the recommended torque value within the specified range of
torque values; refer to the
This procedure to tighten the swivel nut requires a drive-adapter wrench
(e.g., crowfoot wrench).
Note: It may be necessary to use a drive-adapter wrench (e.g., crowfoot
wrench) to install a hydraulic fitting; refer to
When Using a Drive-Adapter Wrench (page
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1. Mark nut and fitting body
2. Final position
5. If a torque wrench is not available or if space at the swivel nut prevents the
use of a torque wrench, use the alternative procedure Flats From Wrench
Resistance (FFWR) given below
A. Use a wrench to tighten the swivel nut onto the fitting until you feel light
resistance with the wrench-approximately 3.39 N∙m (30 in-lb).
B. Put a mark on the swivel nut and body of the fitting (item 1 in
23). If connecting a hose, hold the hose in alignment with a wrench to
prevent the hose from turning.
Figure 22
Swivel nut 3. O-ring
Hose/Tube Installation Torque Table (page
Figure 23
3. Initial position
4. Extend line
(Figure 23).
Page 5–6
4. Fitting body
(Figure 22).
Calculating the Torque Values
2–6).
Figure
Reelmaster ® 3100-D/3105-D
20252SL Rev A
5–7).