Form No. 3441-758 Rev A Groundsmaster® 1200 Series Pull Behind Rotary Mower Model No. 31905—Serial No. 407700000 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 B71.4-2017. 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 Storing the Machine.......................................... 44 Safety ....................................................................... 4 General Safety ................................................... 4 Safety and Instructional Decals .......................... 4 Setup ........................................................................ 6 1 Applying the Entanglement Decal .................... 6 2 Installing the Deck Cover Knobs.......................
Safety • Keep bystanders and children out of the operating General Safety • Before you leave the operator’s position, do the area. Never allow children to operate the machine. following: This product is capable of amputating hands and feet and of throwing objects. Always follow all safety instructions to avoid serious personal injury • Read and understand the contents of this Operator’s Manual before starting the machine. • Use your full attention while operating the machine.
decal138-3078 138-3078 1. Belt routing CE entanglement decal 138-9038 decal120-6604 120-6604 1. Thrown object hazard—keep bystanders away from the machine. 2. Cutting/dismemberment hazard of hand, mower blade—stay away from moving parts; keep all guards and shields in place. decal138-9038 3. Cutting/dismemberment hazard of foot, mower blade—stay away from moving parts; keep all guards and shields in place. 138-9038 1.
Setup Loose Parts Use the chart below to verify that all parts have been shipped. Procedure Description 1 2 3 4 5 6 7 Use Qty. CE entanglement decal 4 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 Hitch Pin Hairpin Cotter 2 2 Adjust the transport frame hitch. PTO driveshaft half (forward) 1 Assembling the PTO driveshaft.
2. Remove the push-nut that secures the bolt to the deck cover and remove the bolt from the cover (Figure 4). g264078 Figure 4 1. Bolt 2. Deck cover g270806 3. Install the mower deck cover with the knob; refer to Installing the Deck Covers (page 29). 4. Repeat steps 1 through 3 for the remaining deck covers, Figure 3 1. Existing entanglement decal 2. CE entanglement decal 2. Clean the existing entanglement decal and the guard area surrounding the decal. 3.
4 5 Adjusting the Tow Bar of the Mower Adjusting the Clevis Hitch Parts needed for this procedure: No Parts Required 2 Hitch Pin 2 Hairpin Cotter Assessing the Job Site Procedure Consider the following job site conditions to determine the tow bar position of the mower: • Turf with hills and dips in the contour—set the tow bar to a shorter length. • Turf that is primarily flat—set the tow bar to a longer length. Note: Contact your authorized Toro distributor to obtain the optional pintle hitch. 1.
4. Remove the ball pin from the jack and rotate the jack so that it is in storage position. Install the ball pin to secure it in the storage position. 6 Assembling the PTO Driveshaft g337430 Figure 9 1. Driveshaft rest (hose guide) 2. PTO driveshaft Parts needed for this procedure: 1 3. PTO driveshaft half (forward) Partially extend the PTO driveshaft to access the grease fitting near the middle of the inboard driveshaft guard (Figure 10). Procedure 1.
7 Installing the Deck-Lock Rope to the Mower Parts needed for this procedure: 1 Deck-lock rope Procedure 1. Thread the end of the deck-lock rope through the hole in the lock lever and tie the rope securely (Figure 11). g337426 Figure 12 g272421 Figure 11 1. Deck-lock rope 2. 2. Lock lever Route the free end of the deck-lock rope from the lock lever through the 2 hose guides (Figure 12). 10 1. Deck-lock rope 3. Knotted end of the deck-lock rope 2. Lock lever 4.
Product Overview g337427 Figure 13 1. Rear mower deck 4. Outer mower deck 7. Quick-connect coupling (PTO driveshaft) 2. Deck lock 5. Guard (PTO driveshaft) 8. Hydraulic hoses 3. Lock lever 6. Hose guide and driveshaft rest g337428 Figure 14 1. Deck-lock rope 3. Guard (deck driveshaft) 2. Jack 4. Roller 11 5.
Specifications Note: Specifications and design are subject to change without notice. Tow Vehicle Specification Minimum PTO output-power rating 26 Kw (35 hp) 540 rpm Recommended PTO speed PTO Rotation Clockwise (viewed from behind the tow vehicle) PTO spindle 34.
PTO Speed • Use only a tow vehicle with the mower that has a maximum PTO speed of 540 rpm (9 rotations per second). The mower is designed to operate with a PTO speed of up to 540 rpm. Most tow vehicles indicate a 540 PTO rpm position on the tachometer. • Ensure that the guards and shields are properly installed and maintained. Replace missing, damaged, or worn guards and shields before using the machine.
Checking the Tire Air Pressure Service Interval: Before each use or daily DANGER Low tire pressure decreases mower stability when transporting it. This could cause a rollover, which may result in personal injury or death. 1. PTO shaft guard (forward half) Do not operate the mower with underinflated tires. 3. 1. g337431 Figure 16 Check the tire air pressure daily. Move the forward half of the PTO shaft guard together and apart to ensure that they telescope freely (Figure 16).
6. Check that the restraint chains for the driveshaft guards are connected to center gearbox and the gearboxes on each mower deck (Figure 18, Figure 19, Figure 20, and Figure 21). g311060 Figure 20 Center Deck Driveshaft Guard g311063 1. Center deck gearbox 3. Restraint chain 2. Driveshaft guard (center deck) 4. Front of the machine Figure 18 Center Gearbox 1. Restraint chain 3. Driveshaft guard 2. PTO shaft guard 4.
7. Check that the 7 hose clamps firmly secure the driveshaft guards to the center and deck gear boxes (Figure 22). g264297 Figure 22 1. Hose clamps Using the Tow Bar Jack Supporting the Mower with the Jack 1. 2. 3. g337432 Figure 23 Park the machine on a level surface, move the shift lever to the NEUTRAL position. 1. Pin 3. Jack pad 2. Tow-bar jack 4. Jack handle Engage the parking brake, shut off the engine, remove the key, and wait for all moving parts to stop. 4.
8. 9. 10. Disconnect the hydraulic hoses and the PTO driveshaft 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 23 in Supporting the Mower with the Jack (page 16). Remove the pin and rotate the tow bar jack horizontal.
Connecting the Mower to the Tow Vehicle 1. Use jack handle to raise or lower the tow bar jack and align the tow bar to the drawbar or pintle hitch (Figure 28). g337423 Figure 28 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 28). 4.
Connecting the Driveshaft to the PTO 1. Align the quick-connect coupling of the PTO driveshaft with the output shaft of the PTO (Figure 30). g337434 Figure 30 1. PTO output shaft (machine) 2. 2. Quick-connect coupling (PTO driveshaft) Pull back the lock collar of the quick-connect coupling (Figure 31). g250500 Figure 31 1. Lock collar (quick-connect coupling) 3. Driveshaft yoke 2. Splines (PTO output shaft) 4. Shield 3.
g264215 Figure 32 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.
g337435 Figure 36 g337437 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. 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. g250715 Figure 37 1.
Raising the Mower Decks to the Transport Position For instruction on using the PTO and rear attachment control, refer to the Operator’s Manual for your tow vehicle. Note: If the rear-mower deck locks do not engage the deck pins adjust the height of the deck locks. Refer to Adjusting the Rear-Mower Deck Locks (page 43). 1. Move the mower to a flat area. 2. Shut off the PTO. 3. Pull and hold the deck-lock rope (Figure 38). g337437 Figure 39 5. The deck locks engage the deck pins (Figure 40).
C. Making a Sharp Turn Engage the parking brake, shut off the engine, remove the key, and wait for all moving parts to stop. 2. Determine the height that you want to cut the grass. 3. Loosen the 4 locknuts that secure the 4 height-of-cut adjusters (Figure 41) of the mower deck. 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.
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 45. g264176 Figure 45 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 46). g251061 Figure 46 28 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 47). 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 driveshaft (Figure 48). g337452 g254821 Figure 47 1. Latch (mower-deck cover) 3. Knob (deck cover—non-CE mowers) 2.
Greasing the Telescoping Driveshaft Joints Service Interval: Every 50 hours 1. Partially extend the PTO driveshaft to access the grease fitting near the middle of the inboard driveshaft guard (Figure 49). g255328 g337454 g255327 g264298 Figure 50 Figure 49 2. Apply grease to the 4 grease fittings for the telescoping driveshaft joints as shown in Figure 49.
Greasing the Driveshaft Guard-Slip Joints Service Interval: Every 50 hours Apply the specified grease to the 6 grease fittings for the driveshaft guard-slip joints as shown in Figure 51. g337447 Figure 52 Left or Right Mower Deck 1. Outboard • Apply grease the lift arms and hydraulic cylinders, and impact struts of the center mower deck (Figure 53). g337445 g302979 Figure 53 Center Mower Deck 1.
Servicing the Gearboxes Apply the specified grease to the grease fittings at the 2 belt tensioners of each mower deck. Customer supplied material: PTFE thread sealant and a small hand pump. Gearbox Fluid Specification • Toro Premium Tractor fluid • Mobilfluid™ 424 tractor hydraulic fluid Checking the Gearbox Fluid Level Service Interval: Every 50 hours 1. g264169 Figure 55 Remove the dipstick from the dipstick port at the top of the center gearbox (Figure 57 or Figure 58).
Changing the Center Gear Box Lubricant Service Interval: After the first 50 hours Yearly Draining the Center Gearbox g255263 Figure 58 Deck Gearbox 1. Dipstick 3. Full dipstick mark 2. Dipstick port 4. Add dipstick mark 2. g337443 Figure 59 Center Gearbox Drain Location Check the fluid level indicated on the dipstick (Figure 57 or Figure 58). 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: 2,484 ml (84 fl oz) 1. Remove the dipstick from the dipstick port at the top of the center gearbox and wipe clean the dipstick (Figure 61). Service Interval: After the first 50 hours Yearly Emptying the Deck Gearbox 1. Remove the dipstick from the top of the gearbox (Figure 62). g255252 Figure 61 Center Gearbox 1. Dipstick 4. Fill port 2. Fill plug 5. Full dipstick mark 3. Dipstick port 6.
g251058 Figure 64 The belts for the left deck are shown. The belts right and center decks are similar. g255294 Figure 63 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 63).
Note: You may need to rotate the belt while removing it from the center-spindle pulley. Installing the Short Belt 1. Route the short belt around the left-spindle pulley and the lower groove of the center-spindle pulley (Figure 67). g255022 Figure 65 1. Drive pulley 4. Tensioner and pulley 2. Long belt 5. Right-spindle pulley 3. Center-spindle pulley 3. Slip the long belt off the drive pulley, center-spindle pulley, and right-spindle pulley (Figure 65). 4. Remove the belt from the mower.
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 68). 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 39) and Installing the Blades (page 40) 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 71 1. Clean area (bottom of the mower deck) 3.
2. Rotate the blade bolt clockwise to remove the bolt (Figure 74). Important: The blade bolts have left-hand threads g004480 Figure 74 g004653 Figure 73 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 75 1. Sharpen at original angle 2. Check the balance of the blade by putting it on a blade balancer (Figure 76). 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 77). Repeat this procedure until the blade is balanced. g000277 Figure 76 g004480 1. Blade Figure 77 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 78. g337448 Figure 79 1. 4-7/8 inch measurement 2. Height-of-cut adjuster 2.
g337442 Figure 80 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 81). g337449 Figure 82 Rotate the height-of-cut adjuster until you achieve the following results: • The height-of-cut block to the ground measurement the same at all 4 locations. 1. Height-of-cut adjuster 4. Pointer 2. Socket-head screw 5. 51 mm (2 inches) mark (decal) 3.
3. g337439 Figure 84 1. Socket-head screw 2. Height-of-cut adjuster (rear roller) 4. Pointer 5. Nut 3. 51 mm (2 inches) mark (decal) 7. Torque the 4 nuts that secure the 4 height-of-cut adjuster blocks (Figure 82 and Figure 84) for the front and rear rollers to 322 to 396 N∙m (238 to 292 ft-lb). Adjusting the Rear-Mower Deck Locks Adjust the rear-mower deck locks when the mower deck does not correctly latch the deck pins (Figure 40). 1. Loosen the jam nut (Figure 85). 2.
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: 1. Park the machine on a level surface; engage the parking brake; shut off the engine; remove the key; and wait for all movement to stop before leaving the machine. 2. Clean off any dirt or grease that may have accumulated on the machine or any of the moving parts. 3. Lubricate all grease fittings. 4.
Notes:
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