FORM NO. 3322–201 GROUNDSMASTER 52” Mower for 120 Traction Unit Model No. 30753 – 990001 & 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 . . . . . . . . . . . . . . Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loose Parts . . . . . . . . . . . . . . . . . . . . . . . . . Installing the Castor Wheels . . . . . . . . . . . Installing the Carrier Frame to the Traction Unit . . . . . . . . . . . . . . . . . . . . . . Installing the Cutting Mower . . . . . . . . . . . Installing the Drive Belt . . . . . . . . . . . . . . . Operation . . . . . . . . . . . . . . . . . . . . . . . . . .
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. " $,- + " ! $,- + ! ! # ! " $,- + ! $,- + " $,- + .
Assembly Loose Parts Note: Use the chart below to identify parts used for assembly. DESCRIPTION QTY.
Assembly Installing the Castor Wheels 1. Place the (2) thrust washers onto the castor wheel fork (Fig. 1). 2. Insert the castor wheel fork into the carrier frame mounting tube (Fig. 1). 3. Install (2) thrust washer onto the castor wheel fork, then secure with a retaining ring (Fig. 1). Installing the Carrier Frame to the Traction Unit 1. Align the carrier frame and shim holes with the mounting holes in the traction unit frame (Fig. 2). 2.
Assembly Installing the Cutting Mower Installing the Drive Belt 1. Position mower under the carrier frame. 1. Release latches holding covers to the top of the mower, over gearbox pulley, and remove. 2. Mount the mower to the carrier frame with four (4) clevis pins and hairpin cotters (Fig. 3). 2. Install the drive belt around the jackshaft pulley, on the traction unit, and the gearbox pulley. Raise the idler pulley and position over the upper portion of the drive belt (Fig. 4). 3.
Operation Operating the Power Take Off (PTO) POTENTIAL HAZARD • When the mower is attached to the traction unit, without additional weight, the traction unit may become unstable. The power take off (PTO) switch engages and disengages power to the electric clutch. WHAT CAN HAPPEN Engaging the PTO • Loss of traction and stability may cause loss of control. HOW TO AVOID THE HAZARD • NEVER operate the traction unit with mower attached, unless rear weight is installed. 1. Release the parking brake. 2.
Operation Implement Lift Lever Adjusting Gage Wheels The implement lift lever (Fig. 6) is used to raise and lower various attachments. The gage wheels must be adjusted in the proper hole location for each height-of-cut position. 1. Remove pressure from traction pedal to stop the machine. After adjusting height-of-cut. raise the attachment lift lever: Refer to Raising Attachments. 2. Pull implement lift lever (Fig. 6) rearward to raise attachment to the desired height.
Maintenance Service Interval Chart Service Operation Each Use Cutting blades – check 8 Hours X Belts – check for wear/cracks Notes X X Idler arm – oil X Castor wheels – grease X Gearbox – check level of lubricant Mower housing – clean 50 Hours X Blade spindle bearings – grease 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.
Maintenance Inspecting the Blades Checking for Bent Blades 1. Inspect the cutting edges (Fig 8). If the edges are not sharp or have nicks, remove and sharpen the blades. Refer to Sharpening the Blades on page 10. 1. 2. Inspect the blades, especially the curved area (Fig. 8). If you notice any damage, wear, or a slot forming in this area (item 3 in Fig. 8), immediately install a new blade. Rotate the blades until the ends face forward and backward (Fig. 9).
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. 12). 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 Front-to-Rear Pitch 1. Check the tire pressure. If one cutter blade cuts lower than the other, correct as follows: 2. Position the blades front-to-rear (Fig. 14). Measure at “C” and “D” locations (Fig. 14) from a level surface to the cutting edge of the blades (Fig. 15). 3. The mower should be 1/8”–5/8” (3–16 mm) lower in front “C” than in the rear “D”. 1.
Maintenance 4. 5. To change the front-to-rear pitch, move an equal number of thrust washers on both castor wheel forks. Move the thrust washers from the top of the carrier frame mounting tube to the bottom to raise the front of the mower. Move the thrust washers from the bottom of the mounting tube to the top to lower the front of the mower. (Fig. 16). Setting the Side-to-Side Leveling Check the side-to-side leveling of the cutting unit. 1. Check the tire pressure. 2.
Maintenance Greasing and Lubrication Lubrication Greasing The gearbox lubrication should be checked regularly. Refer to the Service Interval Chart on page 8. Fill with SAE EP 90 gear lube. The cutting unit must be lubricated regularly. Refer to the Service Interval Chart on page 8. Grease with No. 2 general purpose lithium base or molybdenum base grease. 1. 2. Stop the engine, remove the key and disconnect the spark plug wire(s) from the spark plug(s).
Maintenance Replacing the Mower Belt Squealing when the belt is rotating, blades slipping when cutting grass, frayed belt edges, burn marks and cracks are signs of a worn mower belt. Replace the mower belt if any of these conditions are evident. 1. 2. Stop the engine, remove the key and disconnect the spark plug wire(s) from the spark plug(s). Release the latches holding the mower cover to the top of the cutting unit and remove the mower cover (Fig. 22). 3.
Maintenance Replacing the Drive Belt Replacing the Grass Deflector 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. Remove the locknuts, bolts and springs holding the deflector mounts to the pivot brackets (Fig. 25). 2.
Maintenance Replacing the Castor Wheel Fork Bushings 4. Insert a pin punch into the mounting tube and carefully drive out the bushings (Fig. 27). Clean the inside of the mounting tube. The castor wheel forks are mounted in bushings pressed into the top and bottom of the carrier frame mounting tubes. To check the bushings, move the castor forks back and forth and side-to-side. If a castor fork is loose, the bushings are worn and must be replaced. 5. Grease the inside and outside of the new bushings.
Maintenance Servicing the Castor Wheels and Bearings The castor wheels rotate on a roller bearing supported by a spanner bushing. If the bearing is kept well lubricated, wear will be minimal. Failure to keep the bearing well lubricated will cause rapid wear. A wobbly castor wheel usually indicates a worn bearing. 1. Remove the locknut and wheel bolt holding the castor wheel to the castor fork (Fig. 28). 2.
Maintenance Storage 1. Clean any dirt and chaff from the top of the mower. 2. Scrape any heavy buildup of grass and dirt from the underside of the mower, then wash the mower with a garden hose. 3. Check the condition of the blades. Refer to Cutting Blades on page 8. 4. Check the condition of the drive and mower belts. 5. Check and tighten all bolts, nuts and screws. Repair or replace any part that is damaged or defective. 6. Paint all scratched or bare metal surfaces.
Troubleshooting PROBLEM Abnormal vibration. Uneven cutting g height. g Blades do not rotate. 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. Gearbox mounting bolts are loose. 3. Tighten gearbox mounting bolts. 4. Loose gearbox pulley, idler pulley, or blade pulley. 4. Tighten the appropriate pulley. 5. Gearbox pulley is damaged. 5.
