Installing The Hydraulic Hose And Tube (O-Ring Face Seal Fitting) - Toro Groundsmaster 4300-D Service Manual

Installing the Hydraulic Hose and Tube (O-Ring Face Seal Fitting)

Groundsmaster ® 4300-D
16226SL Rev C
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.
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1. Tube or hose
2. Swivel nut
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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
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).
Figure 23
3. O-ring
4. Fitting body
Figure 24
Hose/Tube Installation Torque Table (page
(Figure 24).
Page 4–9
(Figure 23).
Calculating the Torque Values
2–5).
Hydraulic System: General Information
4–10).