FORM NO. 3318–954 Rev. A Z–MASTER 60” Mower for Zero Radius Tractors Model No. 78476 – 790001 & Up Operator’s Manual IMPORTANT: Read this manual carefully. It contains information about your safety and the safety of others. Also become familiar with the controls and their proper use before you operate the product.
Introduction We want you to be completely satisfied with your new product, so feel free to contact your local Authorized Service Dealer for help with service, genuine replacement parts, or other information you may require. Whenever you contact your Authorized Service Dealer or the factory, always know the model and serial numbers of your product. These numbers will help the Service Dealer or Service Representative provide exact information about your specific product.
Contents Safety and Instruction Decals . . . . . . . . . . . . . . Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loose Parts . . . . . . . . . . . . . . . . . . . . . . . . . Assemble the Grass Deflector . . . . . . . . . . Installing the Mower . . . . . . . . . . . . . . . . . Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Side Discharge or Mulch Grass . . . . . . . . . Operating the Power Take Off (PTO) . . . . Attachment Lift . . . . . . . . . . . . . . . .
Safety Safety and Instruction 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 lost.
Installation Loose Parts Note: Use the chart below to identify parts used for assembly. DESCRIPTION QTY.
Installation Assemble the Grass Deflector Installing the Mower 1. 1. Remove (2) wing nuts and washers on footrest panel and remove panel from frame. 2. Slide mower under traction unit. 3. Secure stabilizer bars to traction unit frame mounts with (2) 3/8”–1-1/4” (32 mm) clevis pins and (2) hairpin cotters (Fig. 2). 4. Select proper hole for height-of-cut. Secure stabilizer bars to mower front brackets with (2) 3/8”–1-1/4” (32 mm) clevis pins and (2) hairpin cotters (Fig. 2). 2.
Installation 5. Push attachment lift pedal all the way forward, remove pedal spring and move foot pedal all the way back (Fig. 3). 1 2 10. Hook spring over pin on idler plate and loosely mount to mower with eye bolt, 3/8” washer and (2) 3/8” jam nuts (Fig. 5). 11. Tension the drive belt by tightening the front jam nut on eyebolt until the spring is 16-1/2” (41.9 cm). Measure the spring length between the pin and the eyebolt (Fig. 5). 12. Tighten the jam nuts (Fig. 5). 6 1 7 Figure 3 1.
Operation Side Discharge or Mulch Grass Operating the Power Take Off (PTO) The mower has a hinged grass deflector that disperses clippings to the side and down toward the turf. The power take off (PTO) engages and disengages power to the attachment clutch. Engaging the Power Take Off (PTO) POTENTIAL HAZARD • Without the grass deflector or complete grass catcher assembly mounted in place, you and others are exposed to blade contact and thrown debris. 1.
Operation Attachment Lift Adjusting the Height-of-Cut The attachment lift (Fig. 7) is used to raise and lower attachments. The pins and stabilizer bars are used to adjust the height-of-cut range; refer to; Setting the Front-to-Rear Pitch page 14. Raising Attachments 1. Set the stabilizer bars for the desired cut height range, refer to; Setting the Front–to–Rear Pitch page 14. 2. Loosen down stop on attachment lift (Fig. 8). 3.
Operation Adjusting the Gauge Wheel Whenever you change the height-of-cut you must also adjust the height of the gauge wheels. Stop the engine before adjusting the gauge wheel height. 1. Pull the hairpin cotter out of the clevis pin and remove the clevis pin from the gauge wheel plate and mounting bracket (Fig. 9). 2. Reposition the gauge wheel so it’s approximately 1/4” to 3/8” (6 to 10 mm) above the ground, then insert the clevis pin through the gauge wheel plate and mounting bracket (Fig. 9). 3.
Operation Tips for Mowing Grass Fast Throttle Setting Cutting Speed To improve cut quality, use a slower ground speed. For best mowing and maximum air circulation, operate the engine at “FAST.” Air is required to thoroughly cut grass clippings, so do not set the height-of-cut so low as to totally surround the mower by uncut grass. Always try to have one side of the mower free from uncut grass, which allows air to be drawn into the mower.
Maintenance Service Interval Chart Service Operation Each Use Cutting Blades – check 8 Hours X Belts – check for wear/cracks X X X Chipped Surfaces – paint Cutting Blades To ensure a superior quality of cut, keep the blades sharp. For convenient sharpening and replacement, you may want to keep extra blades on hand. POTENTIAL HAZARD • A blade that is worn or damaged could break apart and pieces could be thrown at bystanders or at you as you use the mower.
Maintenance Inspecting the Blades Checking for Bent Blades 1. Inspect the cutting edges (Fig 10). If the edges are not sharp or have nicks, remove and sharpen the blades. Refer to Sharpening the Blades on page 12. 1. 2. Inspect the blades, especially the curved area (Fig. 10). If you notice any damage, wear, or a slot forming in this area (item 3 in Fig. 10), immediately install a new blade. Rotate the blades until the ends face forward and backward (Fig. 11).
Maintenance Sharpening the Blades 1. POTENTIAL HAZARD • A blade that is bent or damaged could break apart and pieces could be thrown at bystanders or at you as you use the mower. Use a file to sharpen the cutting edge at both ends of the blade (Fig. 14). Maintain the original angle. The blade retains its balance if the same amount of material is removed from both cutting edges. WHAT CAN HAPPEN • Pieces of blade that may be thrown could seriously injure or kill you or bystanders.
Maintenance Correcting Cutting Unit Mismatch Setting the Side-to-Side Leveling 1. Check the tire pressure. If one cutter blade cuts lower than the other, correct as follows: 2. Position the blades side-to-side (Fig. 16). Measure at “A” and “B” locations (Fig. 16) from a level surface to the cutting edge of blades (Fig. 17). 3. The difference between measurements “A” and “B” should be no more than 1/4” (6 mm). 1. 2.
Maintenance Setting the Front-to-Rear Pitch 1. Check the tire pressure. 2. Position the blades front-to-rear (Fig. 19). Measure at “C” and “D” locations (Fig. 19) from a level surface to the cutting edge of the blades (Fig. 20). 3. 4. To change the front-to-rear pitch, change pin location at center stabilizer mounts on both sides (Fig. 21). 5. Select the cut height range for adjustment according to decal. 2 The mower should be 1/8”–5/8” (3–16 mm) lower in front “C” than in the rear “D”.
Maintenance Greasing the Bearings Replacing the Deck Belt The cutting unit must be lubricated regularly. Refer to the Service Interval Chart on page 10. Grease with No. 2 general purpose lithium base or molybdenum base grease. Squealing when the belt is rotating, blades slipping when cutting grass, frayed belt edges, burn marks and cracks are signs of a worn deck belt. Replace the deck belt if any of these conditions are evident. 1.
Maintenance Replacing the Drive Belt 4. Squealing when the belt is rotating, blades slipping when cutting grass, frayed belt edges, burn marks and cracks are signs of a worn drive belt. Replace the drive belt if any of these conditions are evident. 1. Install the new drive belt onto the traction unit PTO clutch pulley and the top groove of the center spindle pulley (Fig. 25). 1 Stop the engine, set the parking brake, remove the key and disconnect the spark plug wire(s) from the spark plug(s). 2.
Maintenance Replacing the Grass Deflector Storage 1. Remove the locknuts, bolts and springs holding the deflector mounts to the pivot brackets (Fig. 27). 1. Clean any dirt and chaff from the top of the mower. 2. 2. If the pivot brackets need to be replaced, remove the carriage bolts and cone locknuts holding the old brackets to the top of the discharge opening, then install the replacement pivot brackets. Make sure the carriage bolt heads are on the inside of the cutting unit (Fig. 27).
Troubleshooting PROBLEM Abnormal vibration. Uneven cutting g height. g Blades do not rotate. 18 POSSIBLE CAUSES CORRECTIVE ACTION 1. Cutting blade(s) is/are bent or unbalanced. 1. Install new cutting blade(s). 2. Blade mounting bolt is loose. 2. Tighten blade mounting bolt. 3. Engine mounting bolts are loose. 3. Tighten engine mounting bolts. 4. Loose engine pulley, idler pulley, or blade pulley. 4. Tighten the appropriate pulley. 5. Engine pulley is damaged. 5.
