Form No. 3373-396 Rev B Hydraulic System Cooling Kit GrandStand® Mower Model No. 121-7480 Installation Instructions Installation Loose Parts Use the chart below to verify that all parts have been shipped. Procedure 1 2 3 4 5 6 © 2012—The Toro® Company 8111 Lyndale Avenue South Bloomington, MN 55420 Description Qty. Use No parts required – Preparing the unit. No parts required – Removing the low pressure hoses.
1 1 Preparing the Unit 2 No Parts Required Procedure 3 WARNING Hydraulic fluid escaping under pressure can penetrate skin and cause injury. g018697 Figure 1 • Make sure all hydraulic fluid hoses and lines are in good condition and all hydraulic connections and fittings are tight before applying pressure to the hydraulic system. 1. Platform up 3. Pull the knob out to release the platform 2. Platform down 9. Remove the hairpin cotter securing the rear cushion bracket (Figure 2).
2 1 Removing the Low Pressure Hoses No Parts Required Procedure 1. Remove the bolt, nut, and R-clamp securing the hose connecting the right-hand pump to the hydraulic reservoir bracket (Figure 3). g018420 Note: Discard the R-clamp. 2 Figure 4 Your model may vary from this diagram. 2. Hoses 1. Cable tie 1 3 2 g01842 5 1 g018419 2 Figure 3 1. Bolt securing the hose Figure 5 Your model may vary from this diagram. 3. Front connector on hydraulic reservoir tank 2. Hydraulic reservoir bracket 1.
. Remove the low pressure hose from the right-hand pump (Figure 6). 1 g018424 1 g018421 Figure 8 Figure 6 1. Remove hose 1. Disconnect here 5. Remove the low pressure hose from the left-hand pump (Figure 7). 3 Installing the Hydraulic System Cooling Assembly Parts needed for this procedure: 1 Hydraulic system cooling assembly 2 Bolt (5/16 x 3/4 inch) 2 Nut (5/16 inch) Procedure 1. Using a 5/16 inch drill bit, ream the hole in the reservoir bracket (Figure 9). 1 g018422 Figure 7 1.
1 1 1 2 2 g018427 Figure 11 1. Upper set of the holes for 2011 models. g018426 Figure 9 1. Hole 2. Locate the serial number decal. g018327 Figure 10 1. Location of the model and serial numbers 3. Determine your model year from the serial number. • 2009—serial number range 290000001 and up • 2010—serial number range 310000001 and up • 2011—serial number range 311000001 and up 4. Locate the mounting holes in the cooling assembly that will be required for your unit.
5. Align the cooling assembly to the reservoir bracket (Figure 12). 1 g018451 1 Figure 14 1. Bolt and nut g018429 Figure 12 8. Secure the cooler assembly using the bolt and nut (Figure 14). 1. Cooling assembly 6. Using the correct set of holes for your unit, secure the right side of the cooling assembly to the hydraulic reservoir bracket using a bolt (5/16 x 1 inch) and nut (5/16 inch) (Figure 12 and Figure 13).
Note: Secure the hose with a hose clamp so that the tabs of the clamp are pointing downward as shown. 1 2 3 1 2 g018452 g018473 Figure 15 1. Cooling assembly inlet port Figure 17 3. Left-hand pump 2. Route the hose and install the other end to the cooling assembly inlet. Note: Rotate tabs on hose clamp as shown in Figure 18. Note: The hose from the right-hand pump connects to a T-connector. The short hose coming off the T-connector goes to the radiator exit port.
Note: Rotate tabs on hose clamp as shown in Figure 18. 2 1 g018454 Figure 19 1. Hose going to the hydraulic reservoir tank g018456 2. T-connector 1 Figure 21 4. Install the hose connecting the T-connector to the right-hand pump (Figure 16 and Figure 20). 1. Cable tie Note: Rotate the tabs of the hose clamp so they are pointing downward. 1 2 g018457 1 Figure 22 g018455 1. Cable tie Figure 20 1. Right-hand pump 2. Hose clamp 6.
1 5 Routing the Wire Harness Parts needed for this procedure: 1 Wire harness 10 Cable tie Procedure 1. Before starting this procedure, observe how you will route the wire harness. g018458 Figure 24 2 1. Cooling assembly connector 3. Route the cooling assembly wire harness underneath all the hoses and through the pump compartment (Figure 25). 1 3 4 g018459 1 g018478 Figure 25 1. Cooling assembly wire harness Figure 23 1. Routing the wire harness to the battery 3. Relay socket 2. Relay 4.
1 7. Install the relay into the relay socket. 8. Remove and discard the protective cap from the end of the AUX connector on the wire harness near the fuse box. 9. Connect the cooling assembly wire harness to the wire harness AUX connector located at the fuse block (Figure 28). 1 g018460 Figure 26 1. Cooling assembly wire harness 5. Remove the relay from the wire harness relay socket (if installed). 6. Install the relay socket to the frame cross brace.
1 1 g018689 g018464 Figure 30 Figure 32 1. Attach the clip on the wire harness to the frame 1. Cable tie 12. Secure the cooling assembly wire harness to the R-clamp located in the lower left front corner of the control tower, using a cable tie (Figure 31). 15. Route the other end of the wire harness to the battery (Figure 23) and (Figure 33). 3 1 g018463 Figure 31 1. Cable tie g018477 13. Remove the slack from the wire harness where it passes through the pump compartment. Figure 33 1.
4 20. Secure the path of the cooling assembly wire harness using the cable ties. 1 3 21. Install the battery cover. 22. Install the 15 amp fuse into the fuse block (Figure 34). 2 G012005 Figure 35 1. Cap 3. Cold fluid level-full 2. Baffle 4. Hot fluid level-full 2. Remove cap from filler neck. (Figure 35). 1 3. Add fluid to the reservoir until it reaches the cold level of the baffle (Figure 35). g018465 Figure 34 4.
