Toro Groundsmaster 4100-D Service Manual

Also see for 30447: Operator's manual Installation instructions Installation instructions

Contents

Groundsmaster 4100--D/4110--DHydraulic System Page 4 -- 6Hydraulic Hose and Tube Installation (O--Ring Face Seal Fitting)1. Make sure threads and sealing surfaces of the hose/tube and the fitting are free of burrs, nicks, scratches orany foreign material.2. As a preventative measure against leakage, it is rec-ommended that the face seal O--ring be replaced anytime the connection is opened. Make sure the O--ring isinstalled and properly seated in the fitting groove. Lightlylubricate the O--ring with clean hydraulic oil.3. Place the hose/tube against the fitting body so thatthe flat face of the hose/tube sleeve fully contacts the O--ring in the fitting.4. Thread the swivel nut onto the fitting by hand. Whileholding the hose/tube with a wrench, use a torquewrench to tighten the swivel nut to the recommendedinstallation torque shown in Figure 5. This tighteningprocess will require the use of an offset wrench (e.g.crowfoot wrench). Use of an offset wrench will affecttorque wrench calibration due to the effective lengthchange of the torque wrench. Tightening torque whenusing a torque wrench with an offset wrench will be lowerthan the listed installation torque (see Using a TorqueWrench with an Offset Wrench in the Torque Specifica-tions section of Chapter 2 -- Product Records and Main-tenance).5. If a torque wrench is not available or if space at theswivel nut prevents use of a torque wrench, an alternatemethod of assembly is the Flats From Wrench Resist-ance (F.F.W.R.) method (Fig. 2).A. Using a wrench, tighten the swivel nut onto the fit-ting until light wrench resistance is reached (approxi-mately 30 in--lb).B. Mark the swivel nut and fitting body. Hold thehose/tube with a wrench to prevent it from turning.C. Use a second wrench to tighten the nut to the cor-rect Flats From Wrench Resistance (F.F.W.R.). Themarkings on the nut and fitting body will verify that theconnection has been properly tightened.Size F.F.W.R.4 (1/4 in. nominal hose or tubing) 1/2 to 3/46 (3/8 in.) 1/2 to 3/48 (1/2 in.) 1/2 to 3/410 (5/8 in.) 1/2 to 3/412 (3/4 in.) 1/3 to 1/216 (1 in.) 1/3 to 1/2Figure 3O--ring Fitting BodySwivel NutTube or HoseFigure 4FinalAT WRENCH RESISTANCEPositionMark Nutand FittingInitialPositionExtend LineAFTER TIGHTENINGBodyFitting Dash Size Hose/Tube Side Thread Size Installation Torque4 9/16 -- 18 18 to 22 ft--lb (25 to 29 N--m)6 11/16 -- 16 27 to 33 ft--lb (37 to 44 N--m)8 13/16 -- 16 37 to 47 ft--lb (51 to 63 N--m)10 1 -- 14 60 to 74 ft--lb (82 to 100 N--m)12 1 3/16 -- 12 85 to 105 ft--lb (116 to 142 N--m)16 1 7/16 -- 12 110 to 136 ft--lb (150 to 184 N--m)20 1 11/16 -- 12 140 to 172 ft--lb (190 to 233 N--m)Figure 5