Form No. 3421-778 Rev A Groundsmaster® 1200 Series Pull Behind Rotary Mower Model No. 31905—Serial No. 400000000 and Up Register at www.Toro.com.
This product complies with all relevant European directives; for details, please see the separate product specific Declaration of Conformity (DOC) sheet. This machine has been designed in accordance with ANSI B71.4-2012. WARNING CALIFORNIA Proposition 65 Warning Use of this product may cause exposure to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. g249978 Figure 1 1. Model and serial number location Model No. Serial No.
Contents Safety Safety ....................................................................... 3 General Safety ................................................... 3 Safety and Instructional Decals .......................... 4 Setup ........................................................................ 6 1 Applying the Entanglement Decal .................... 6 2 Installing the Deck Cover Knobs....................... 7 3 Adjusting the Drawbar Position of the Tow Vehicle ..................................
Safety and Instructional Decals Safety decals and instructions are easily visible to the operator and are located near any area of potential danger. Replace any decal that is damaged or missing. decal110-4668 110-4668 1. Entanglement hazard, shaft—stay away from moving parts. 2. PTO speed and input direction. 3. Use clip to secure lash cable when not in use. Use lash cable to support the power take-off when the machine is disconnected from tractor. decal117-4979 117-4979 decal120-6604 120-6604 1.
decal138-3078 138-3078 1.
Setup Loose Parts Use the chart below to verify that all parts have been shipped. Procedure Description 1 2 3 4 5 6 Use Qty. CE entanglement decal 1 Apply the entanglement decal—CE mowers Knob 6 Install the deck cover knobs. No parts required – Adjust the drawbar position of the machine. No parts required – Adjust the tow bar of the mower No parts required – Convert the pin tow bar to a pintle tow bar. No parts required – Route the deck latch rope at the mower.
2. Clean the existing entanglement decal and the guard area surrounding the decal. 3. Remove the backing from the CE entanglement decal. 4. Place the CE entanglement decal over the existing entanglement decal (Figure 3). 3 Adjusting the Drawbar Position of the Tow Vehicle 2 No Parts Required Procedure Installing the Deck Cover Knobs Adjust the drawbar (Figure 5) of the tow vehicle to the extended position; refer to the Operator’s Manual for your tow vehicle.
Adjusting the Tow-Bar Length 5 Note: The tow bar of the mower has 5 tow-bar positions allowing you to adjust the length 20 cm (8 inches). 1. Converting the Pin Tow Bar to a Pintle Tow Bar Remove the 2 flange locknuts, 2 capscrews, and 2 washers that secure the hitch tube to the receiver tube (Figure 6). No Parts Required Procedure 1. Remove the hairpin that secures the hitch pin to the tow bar, and remove the hitch pin (Figure 7). g250236 Figure 6 1. Hitch tube 4. Flange nut 2. Capscrew 5.
6 Routing the Deck-Lock Rope at the Mower No Parts Required Procedure Route the free end of the deck-lock rope from the lock lever through the 2 hose guides (Figure 8). g260004 Figure 8 1. Deck-lock rope 3. Knotted end of the deck-lock rope 2. Lock lever 4.
Product Overview g262052 Figure 9 1. Rear mower deck 4. Outer mower deck 7. Quick-connect coupling (PTO drive shaft) 2. Deck lock 5. Guard (PTO drive shaft) 8. Hydraulic hoses 3. Lock lever 6. Hose guide and drive shaft rest g262053 Figure 10 1. Deck-lock rope 3. Guard (deck drive shaft) 2. Jack 4. Roller 10 5.
Specifications Mower Specification (cont'd.) Note: Specifications and design are subject to change without notice. Width Tow Vehicle Specification Minimum PTO output-power rating PTO Rotation PTO spindle Minimum hydraulic pressure Tow system 540 rpm Height Clockwise (viewed from behind the tow vehicle) 34.
• Inspect the area where you will use the machine CAUTION and remove all objects that the machine could throw. A running attachment can cause personal injury. • Ensure that your tow vehicle is suitable for use with a mower of this weight by checking with your tow vehicle supplier or manufacturer. To avoid personal injury, do not leave the operator’s seat without first disengaging the PTO drive, engaging the parking brake, shutting off the engine, and removing the key.
Checking the PTO and Drive Shaft Guards Service Interval: Before each use or daily 1. If installed to the tow vehicle, remove the drive shaft. 2. Rotate the forward half of the PTO shaft guard a full rotation (Figure 12). Note: Clean or replace the shaft guard if it does not rotate freely. g264215 Figure 13 1. PTO-shaft guard (forward half) 2. Restraint chain g262236 Figure 12 6. 1. PTO shaft guard (forward half) 3.
g262209 Figure 15 Center Deck Drive-Shaft Guard 1. Drive shaft guard (center deck) 7. 2. Restraint chain Check that the 7 hose clamps firmly secure the drive-shaft guards to the center and deck gear boxes (Figure 16). g250413 Figure 17 g264297 Figure 16 1. Hose clamps 1. Pin 3. Jack pad 2. Tow-bar jack 4. Jack handle 4. Align the hole in the tow bar with the hole in the jack (Figure 17). 5. Insert the pin through the holes in the tow bar and jack (Figure 17). 6.
8. 9. 10. Disconnect the hydraulic hoses and the PTO drive shaft from the tow vehicle. Disconnect the hitch from the tow bar. Drive the tow vehicle in a straight line away from the mower. Stowing the Jack 1. 2. 3. 4. 5. g264148 Ensure that the mower is securely attached to the tow vehicle. Rotate the jack handle to fully raise the jack pad; refer to Figure 17 in Supporting the Mower with the Jack (page 14). Remove the pin and rotate the tow bar jack horizontal.
g250416 Figure 22 Pin tow bar shown 1. Drawbar 2. Tow bar 2. 3. Jack handle Fully raise the 3-point hitch; refer to the Operator’s Manual for your tow vehicle. Note: When equipped, lock the 3-point hitch. 3. Align the drawbar or pintle hitch of the tow vehicle with the tow bar of the mower (Figure 22). 4. Move the shift lever to the NEUTRAL position, engage the parking brake, shut off the engine remove the, and wait for all moving parts to stop. 5.
Connecting the Drive Shaft to the PTO 1. Align the quick-connect coupling of the PTO drive shaft with the output shaft of the PTO (Figure 24). g250417 Figure 24 1. PTO output shaft (machine) 2. 2. Quick-connect coupling (PTO drive shaft) Pull back the lock collar of the quick-connect coupling (Figure 25). g250500 Figure 25 1. Lock collar (quick-connect coupling) 3. Drive shaft yoke 2. Splines (PTO output shaft) 4. Shield 3.
g264215 Figure 26 1. PTO-shaft guard (forward half) 2. Restraint chain Connecting the Hydraulic Hoses 1. Identify the quick-disconnect fittings for the rear attachment-lift and lower circuits for the tow vehicle. 2. Remove the dust covers from the quick-disconnect fittings of the tow vehicle. 3. Remove the black dust cover from the quick-disconnect fitting of the cylinder-extend hose of the mower 4.
• Use care when approaching blind corners, shrubs, trees, or other objects that may obscure your vision. • Do not run the PTO with the decks raised above the partial up-stop position. • Stop the mower whenever you are not cutting grass. • Stop the machine, engage the parking brake, shut off the engine, remove the key, and wait for all moving parts to stop before inspecting the attachment after striking an object or if there is an abnormal vibration in the machine.
Lowering the Mower Decks from the Transport Position Slope Safety • Slopes are a major factor related to loss of control and rollover accidents, which can result in severe injury or death. You are responsible for safe slope operation. Operating the machine on any slope requires extra caution. 1. Ensure that the PTO is in the OFF position; refer to the Operator’s Manual for your tow vehicle. 2. Move the mower to a flat area that is large enough to support the mower decks. 3.
g250716 g250705 Figure 30 7. When the decks fully lower to the ground, release the rope and attachment control. 8. Move the control for the rear attachment-circuit to the FLOAT position; refer to the Operator’s Manual for your tow vehicle. g250715 Figure 31 1. Deck locks Raising the Mower Decks while Cutting Grass Use this procedure to raise the mower decks slightly when turning the machines around at the end of a cutting pass.
g250665 g250714 Figure 32 1. Deck-lock rope Figure 34 3. Lock arm 1. Right deck lock 2. Hose guide 4. 6. Move the control for the rear attachment-circuit to the RAISE position. The mower decks raise to the position (Figure 33). Move the control for the rear attachment-circuit to the LOWER position until the deck locks support the weight of the decks. TRANSPORT Adjusting the Height-of-Cut 1. g250706 Figure 33 5. 2.
Making a Sharp Turn 1. Shift the tow vehicle to LOW GEAR or LOW RANGE. 2. Driving the machine slowly, steer to make the sharp turn. Important: Do not exceed the 75° maximum tow vehicle to mower angle. g250931 g264251 Figure 36 75° Maximum Tow Vehicle to Mower Angle 3. g250930 Figure 35 1. Height-of-cut adjusters 4. Locknut 2. Adjuster capscrew 5. Pointer 3. Cut-height scale 6. Rollers 4.
Transporting the Machine After Operation Important: Raise and latch the decks before loading the mower on to or off from the trailer. After Operation Safety • Use care when loading or unloading the machine • Park the machine on a level surface; engage the into a trailer or a truck. parking brake; shut off the engine; remove the key; and wait for all movement to stop before leaving the machine. • Use full-width ramps for loading the machine into a trailer or a truck.
Maintenance CAUTION If you leave the key in the switch, someone could accidently start the engine and seriously injure you or other bystanders. Remove the key from the switch before you perform any maintenance. WARNING If the mower decks are raised but not latched, the decks could lower unexpectedly and seriously injure you or other bystanders. Fully raise all decks and ensure the pins on all lift arms engage the latches.
Lifting the Mower 1. Lift the mower at the axle halves as shown in Figure 39. g264176 Figure 39 1. Axle halves 2. Use jack stands to support the mower. Accessing the Mower Decks Removing the Deck Covers 1. Release the 3 latches that secure the cover of the mower deck (Figure 40). g251061 Figure 40 26 1. Knob (deck cover—non-CE mowers) 3. Bolt (deck cover—CE mowers) 2. Latch (mower-deck cover) 4. Knob (non-CE mowers) or bolt (CE mowers) 2.
Lubrication Installing the Deck Covers 1. Align the latches of the mower-deck cover with the holes in the mower deck (Figure 41). Grease Specification No. 2 lithium base grease Greasing the PTO Shaft Constant Velocity Joint Service Interval: Before each use or daily Apply the specified grease to the 3 grease fittings at the forward end of the PTO drive shaft (Figure 42). g255325 g254821 Figure 41 1. Latch (mower-deck cover) 3. Knob (deck cover—non-CE mowers) 2.
Greasing the Telescoping Drive-Shaft Joints Service Interval: Every 50 hours 1. Partially extend the PTO drive shaft to access the grease fitting near the middle of the inboard drive-shaft guard (Figure 43). g255328 g264299 g255327 g264298 Figure 44 Figure 43 2. Apply grease to the 4 grease fittings for the telescoping drive-shaft joints as shown in Figure 43.
Greasing the Drive Shaft Guard-Slip Joints Service Interval: Every 50 hours Apply the specified grease to the 6 grease fittings for the drive shaft guard-slip joints as shown in Figure 45. g251060 Figure 46 Left or Right Mower Deck 1. Outboard • Apply grease the lift arms and hydraulic cylinders, and impact struts of the center mower deck (Figure 47). g264214 g251059 Figure 47 Center Mower Deck g264213 1.
Greasing the Belt Tensioners Service Interval: Every 50 hours 2. Grease the deck roller bearings at the right side of the deck (Figure 50). 3. Repeat steps 1 and 2 for the deck rollers at the other decks. Apply the specified grease to the grease fittings at the 2 belt tensioners of each mower deck. Servicing the Gearboxes Customer supplied material: PTFE thread sealant and a small hand pump.
Changing the Center Gear Box Lubricant Service Interval: After the first 50 hours Yearly Draining the Center Gearbox g255263 Figure 52 Deck Gearbox 1. Dipstick 3. Full dipstick mark 2. Dipstick port 4. Add dipstick mark 2. g255203 Figure 53 Center Gearbox Drain Location Check the fluid level indicated on the dipstick (Figure 51 or Figure 52). 1. The fluid level should indicate between the full and add marks of the dipstick.
Changing the Deck Gearbox Lubricant Filling the Center Gearbox Center gearbox fluid capacity: 1,774 mL (60 fl oz) 1. Remove the dipstick from the dipstick port at the top of the center gearbox and wipe clean the dipstick (Figure 55). Service Interval: After the first 50 hours Yearly Emptying the Deck Gearbox 1. Remove the dipstick from the top of the gearbox (Figure 56). g255252 Figure 55 Center Gearbox 1. Dipstick 4. Fill port 2. Fill plug 5. Full dipstick mark 3. Dipstick port 6.
g251058 Figure 58 The belts for the left deck are shown. The belts right and center decks are similar. g255294 Figure 57 1. Tensioner pulleys 4. Short belt (left) 5. Long belt (right) 1. Dipstick 3. Full dipstick mark 2. Drive pulleys 2. Dipstick port 4. Add dipstick mark 3. Spindle pulleys (left, center, and right) 2. Thread the dipstick into the port, remove the dipstick, and check that the lubricant level (Figure 57).
Note: You may need to rotate the belt while removing it from the center-spindle pulley. Installing the Short Belt 1. Install the long belt; refer to Installing the Long Belt (page 35). 2. Route the long belt around the left-spindle pulley and the lower groove of the center-spindle pulley (Figure 61). g255022 Figure 59 1. Drive pulley 4. Tensioner and pulley 2. Long belt 5. Right-spindle pulley 3. Center-spindle pulley 3.
Installing the Long Belt 1. DANGER Route the long belt around the drive pulley, upper groove of the center-spindle pulley, and right-spindle pulley (Figure 62). A worn or damaged blade can break, and a piece of the blade could be thrown toward you or a bystander, resulting in serious personal injury or death. • Inspect the blade periodically for wear or damage. • Replace a worn or damaged blade.
The difference between measurements that you observed in steps 4 and 6 exceed 3 mm (1/8 inch), the blade is bent, and you must replace the it; refer to Removing the Blades (page 37) and Installing the Blades (page 38) 6. Repeat steps 3 through 5 for the other blades of the mower deck or steps 1 through 6 for the other decks. g255531 Inspecting the Blades Figure 65 1. Clean area (bottom of the mower deck) 3.
2. Rotate the blade bolt clockwise to remove the bolt (Figure 68). Important: The blade bolts have left-hand threads g004480 Figure 68 g004653 Figure 67 1. Cutting edge 3. Wear/slot forming 2. Sail area 4. Crack 1. Spindle 3. Anti-scalp plate 2. Sail area of blade 4. Blade bolt 3. Removing the Blades Sharpening the Blades Blades must be replaced if a solid object is hit, if the blade is out of balance or is bent.
g000276 Figure 69 1. Sharpen at original angle 2. Check the balance of the blade by putting it on a blade balancer (Figure 70). Note: If the blade stays in a horizontal position, the blade is balanced and can be used. If the blade is not balanced, file some metal off the end of the sail area only (Figure 71). Repeat this procedure until the blade is balanced. g000277 Figure 70 g004480 1. Blade Figure 71 2. Balancer 1. Spindle 3. Anti-scalp plate 2. Sail area of blade 4.
Adjusting the Mower Pitch The factory presets the pitch of the mower deck so that back of the deck is higher than the front. Preparing the Adjust Mower Pitch Customer provided material: a wood block 51 mm (2 inch) 1. For each mower deck that you are adjusting mower pitch, align the center mower blade shown in Figure 72. g256062 Figure 73 1. 4-7/8 inch measurement 2. Height-of-cut adjuster 2.
g256063 Figure 74 1. Height-of-cut adjuster 3. Wood spacer block 51 mm (2 inches) 2. Center mower blade 4. Rear flap 2. Measure the distance between top of adjuster block to the ground (Figure 75). g256085 Figure 76 Rotate the height-of-cut adjuster until you achieve the following results: • The height-of-cut block to the ground 1. Height-of-cut adjuster 4. Pointer 2. Socket-head screw 5. 2 inch mark (decal) 3. Nut measurement the same at all 4 locations.
Storage Storing the Machine At the end of the mowing season or when the mower is stored for an extended period, carry out the following preventative maintenance: g256116 Figure 78 1. Socket-head screw 2. Height-of-cut adjuster (rear roller) 4. Pointer 5. Nut 3. 2 inch mark (decal) 7. Torque the 4 nuts that secure the 4 height-of-cut adjuster blocks (Figure 76 and Figure 78) for the front and rear rollers to 322 to 396 N∙m (238 to 292 ft-lb). 41 1.
Notes:
California Proposition 65 Warning Information What is this warning? You may see a product for sale that has a warning label like the following: WARNING: Cancer and Reproductive Harm—www.p65Warnings.ca.gov. What is Prop 65? Prop 65 applies to any company operating in California, selling products in California, or manufacturing products that may be sold in or brought into California.
The Toro Warranty A Two-Year Limited Warranty Conditions and Products Covered The Toro Company and its affiliate, Toro Warranty Company, pursuant to an agreement between them, jointly warrant your Toro Commercial product (“Product”) to be free from defects in materials or workmanship for two years or 1500 operational hours*, whichever occurs first. This warranty is applicable to all products with the exception of Aerators (refer to separate warranty statements for these products).
