Toro Groundsmaster 7210, Руководство по обслуживанию

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Installing the Hydraulic Fittings (SAE Straight Thread O-Ring
Fitting into the Component Port)
Installing the Non-Adjustable Fittings
g212226
Figure 23
1. Fitting 2. O-ring
1. Ensure that all the threads, the sealing surfaces of fitting, and the component
port are free of burrs, nicks, scratches, or unwanted material.
2. To help prevent a hydraulic leak, replace the O-ring when you open the
connection.
3. Lightly lubricate the O-ring with clean hydraulic fluid. Ensure that the threads
of the fitting are clean with no lubricant applied.
IMPORTANT
Before installing the fitting into the port, determine the material of
which the port is made. Installing a fitting into an aluminum port
requires a reduced installation torque.
4. Install the fitting into the port, then use a torque wrench and socket to tighten
the fitting to the recommended torque value within the specified range of
torque values; refer to the
Fitting Installation Torque Table (page 4–7) .
Note: It may be necessary to use a drive-adapter wrench (e.g., crowfoot
wrench) to install a hydraulic fitting; refer to Calculating the Torque Values
When Using a Drive-Adapter Wrench (page 2–5) .
5. If a torque wrench is not available or if space at the port prevents the use
of a torque wrench, use the alternative procedure Flat From Finger Tight
Table (page 4–8) given below;
A. Install the fitting into the port and tighten the fitting down full length until
finger-tight.
B. If the port material is steel, tighten the fitting to the listed FFFT. If the port
material is aluminum, tighten the fitting to 60% of the listed FFFT.
Fitting Installation Torque Table
Fitting Dash Size Fitting Port Side Thread
Size (inch(es)—threads
per inch)
Installation Torque Into
Steel Port
Installation Torque Into
Aluminum Port
4 7/16—20 21 to 25 N∙m (15 to 19 ft-lb) 13 to 15 N∙m (9 to 11 ft-lb)
5 1/2—20 25 to 29 N∙m (18 to 22 ft-lb) 15 to 20 N∙m (11 to 15 ft-lb)
6 9/16—18 47 to 56 N∙m (34 to 42 ft-lb) 28 to 35 N∙m (20 to 26 ft-lb)
8 3/4—16 79 to 97 N∙m (58 to 72 ft-lb) 48 to 58 N∙m (35 to 43 ft-lb)
Groundsmaster 7210 Page 4–7 Hydraulic System: General Information
16222SL Rev C