FORM NO. 3322–392 Wheel Horse 48” Mower for 5xi Tractors Model No. 78363 – 9900001 & Up Operator’s Manual IMPORTANT: Read this manual, and your tractor manual, carefully. They contain 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 . . . . . . . . . . . . . . . . . . . . . . . . . Mower Preparation . . . . . . . . . . . . . . . . . . . Installing the Mower . . . . . . . . . . . . . . . . . Attach the PTO Drive Belt . . . . . . . . . . . . . Adjusting the Mower . . . . . . . . . . . . . . . . . Removing the Mower . . . . . . . . . . . . . . . . . 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. ON DISCHARGE CHUTE (Part No. 93–1122) (1) ON DECK RIGHT SIDE (1) ON DECK LEFT SIDE (Part No. 92–7108) (2) ON LEVELER BAR (Part No. 98–3478) NEXT TO FRONT WHEELS (Part No. 93–7282) ON MOWER REAR TOP (Part No. 98–3480) ON HEIGHT–OF–CUT BRACKET (Part No. 111655) ON MOWER RIGHT SIDE (Part No.
Installation Loose Parts Note: Use the chart below to identify parts used for assembly. DESCRIPTION QTY. USE Discharge chute 1 Nylon washer 3/8” 2 Spring 1 Rubber bushing 1 Flat washer 1/2” 1 Lock nut 3/8” 1 Cotter pin 3/4” 1 PTO drive belt 1 Install PTO drive belt Pulley box 1 Install pulley box Operator’s Manual 1 Read before operating Install discharge chute Mower Preparation IMPORTANT: The discharge chute must be spring loaded in the down position.
Installation Installing the Mower POTENTIAL HAZARD • Without the discharge chute or the complete grass catcher assembly mounted in place, you and others are exposed to blade contact and thrown debris. WHAT CAN HAPPEN • Contact with rotating mower blade(s) and Initial Preparation The mower is most easily installed when done on a level concrete surface. Rougher dirt or lawn surfaces make installation more difficult. 1.
Installation 3 5 1 3 2 7 6 4 2 1 m–3519 m–3463 Figure 5 Figure 4 1. 2. 3. 4. 5. Attach–A–Matic latches Pulley box Idler pulley Belt tension release arm Belt tension adjustment knob 6. Belt tension indicators (one on each side) 7. Attach–A–Matic button (one on each side) 1. Slots in the side mounting brackets (2) 2. Belt guide 5. Start the tractor. 6.
Installation 8. After the two J–pins are seated through the mower’s mounting brackets, using the attachment lift and your hand on the right front adjustable mower wheel bracket (Fig. 7), position the mower so its attachment bar fits into the mid Attach–A–Matic mount. 9. Turn the lever of the Attach–A–Matic counterclockwise to lock the mower to the tractor (Fig. 8). 10. Set the parking brake, lower the attachment lift, and turn the ignition key to “STOP” to stop the engine.
Installation Attach the PTO Drive Belt 1. 5. Position the belt into the groove of the PTO pulley (Fig. 10), making sure it is also under the pulleys in the pulley box. Hang the belt over the mower, then thread it forward through the belt guide (Fig. 9) on the mower. 2 2 3 1 1 m–3457 m–4231 Figure 9 1. Belt 2. 2. Belt guide Extend the belt through the center of the pulley box, between the two pulleys. 3.
Installation 8. Now adjust the belt tension. A. Push the belt tension release arm back toward the pulley box to tension the belt. B. Check the tension indicators on each side of the pulley box. C. If the tension indicators are not in the same position on both the left and right sides, release the belt tension, turn the adjustment knob and repeat steps A and B until the indicators move to the same position (Fig. 12). D.
Installation Adjusting the Mower Place the mower height–of–cut lever to the middle cut position. Make sure the two adjustable front wheels are off the ground. Adjusting the Height of Cut 1. Disengage the power take off (PTO), set the parking brake, lower the attachment lift, and turn the ignition key to “STOP” to stop the engine. Remove the ignition key. 2. Carefully rotate one of the blades so it is facing front and rear (Fig. 15). 3. Measure the distance from the front tip of the blade (Fig.
Installation 4. Front–to–rear adjustment is made by turning the adjusting nut (Fig. 16) on the back of the mower. To raise the front of the mower, turn the adjustment nut clockwise. To lower the front of the mower, turn the nut counterclockwise. 1 1 m–3459 Figure 17 1. Side–to–side adjustment bolts m–3519 Figure 16 1. Front–to–rear adjustment rod Adjusting Side–to–Side Blade Cut This optional adjustment is available if necessary to compensate for uneven side–to–side cut.
Installation 3 POTENTIAL HAZARD • The “scissor” formed by the mower mounting brackets and the attachment lift arm is dangerous. 4 WHAT CAN HAPPEN • Hands and fingers can get caught between 2 5 the mower parts and the tractor and be injured. HOW TO AVOID THE HAZARD • Keep hands away from moving parts while operating the attachment lift. • Set the parking brake, lower the attachment lift, turn the ignition key to “STOP” to stop the engine, and remove the ignition key before making any adjustments.
Installation 7. Loosen the cam nuts and equally rotate the left–hand and right–hand cams down to raise the front of the deck, or up to lower the front of the deck. Tighten the nuts. 8. Repeat steps 4–7 until the slope of the blade is approximately 1/4” (7 mm) lower in the front than it is in the rear. 6. Release the belt tension release arm on the pulley box to release the tension on the drive belt (Fig. 19). Removing the Mower 2 1.
Installation 8. Press the button of the mid Attach–A–Matic and twist the lever clockwise to release the mower (Fig. 21). 2 2 3 1 m–3458 Figure 23 2 1 m–3457 1. Front Attach–A–Matic button (one on each side) 2. Front Attach–A–Matic latches 3. Pulley box Figure 21 1. Mid Attach–A–Matic button 9. 2. Mid Attach–A–Matic lever Pull the two spring–loaded J–pins from the deck lift arms and twist them slightly so that they stay disengaged (Fig. 22). 11.
Operation Side Discharge The mower has a hinged discharge chute that disperses clippings to the side and down toward the turf. POTENTIAL HAZARD • Without the discharge chute or complete grass catcher assembly mounted in place, you and others are exposed to blade contact and thrown debris. it is a reminder: the implement is being powered and the starter will not crank while the PTO is engaged. Always turn off the PTO before getting off the seat. Engaging the Power Take Off (PTO) 1.
Operation Attachment Lift Lever 1 The attachment lift lever (Fig. 25 & 26) is used to raise and lower various attachments. Raising Attachments 1. Start the tractor. 2. Pull the attachment lift lever upward until the latch locks. In this position, the lift will hold the attachment in the up, or raised position. m–3258 Figure 25 POTENTIAL HAZARD • When the engine is off, attachments in the raised position can gradually lower. 1.
Operation Adjusting the Two Front Wheels The two front adjustable wheels must be adjusted in the proper hole location for each time you change deck height-of-cut position. 1. 2. After selecting a height of cut, make sure the front adjustable wheels are approximately 3/8” (9.5 mm) off the ground. 1 m–3436 Figure 28 To adjust wheel height off the ground, remove the hairpin cotter and pin to change hole location (Fig. 27). 1.
Operation Mowing Direction When Stopping Alternate mowing direction to keep the grass standing straight. This also helps disperse clippings which enhances decomposition and fertilization. If the machine’s forward motion must be stopped while mowing, a clump of grass clippings may drop onto your lawn. To avoid this: Mow at Correct Intervals Normally, mow every 4 days. But remember, grass grows at different rates at different times.
Maintenance Service Interval Chart Service Operation Each Use Cutter Blade—check 5 Hours 25 Hours X X X X X Mower Spindles—grease 50 Hours Belts—check for wear/cracks Mower Housing—clean Belt Tension—check Chipped Surfaces—paint Storage Service X X X initial X X X X POTENTIAL HAZARD • If you leave the key in the ignition switch, someone could start the engine. WHAT CAN HAPPEN • Accidental starting of the engine could seriously injure you or other bystanders.
Maintenance Cutting Blade To assure a superior quality of cut, keep the blade(s) sharp. For convenient sharpening and replacement, you may want to have an extra blade(s). 1 2 3 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. 151 Figure 29 1. Cutting edge 2. Curved area 3. Wear/slot forming WHAT CAN HAPPEN • Pieces of blade that may be thrown could seriously injure or kill you or bystanders.
Maintenance Sharpening the Blade(s) Installing the Blade(s) 1. 1. Use a file to sharpen the cutting edge at both ends of the blade (Fig. 31). Maintain the original angle. The blade retains its balance if the same amount of material is removed from both cutting edges. IMPORTANT: The sail (curved part of the blade) must be pointing up toward the inside of the mower to assure proper cutting. 2. 1 Hold the blade end using a rag or thickly padded glove.
Maintenance Greasing and Lubrication Checking PTO Drive Belt Tension Service Interval/Specification Grease the mower after every 25 operating hours or once a year, whichever occurs first. Grease more frequently when operating conditions are extremely dusty or sandy. Check the PTO drive belt tension after 5 hours of operating with a new belt, then every 50 hours or once a year, whichever occurs first. 1.
Maintenance • Maintain correct belt tension. Installing the Blade Drive Belt • Maintain correct mower level. 1. • Maintain correct blade slope in transport. Install the new belt around the blade pulleys and the idler pulleys. • Adjust the position of the cutter deck belt guide. 2. Attach the spring (Fig. 36). • Replace damaged pulleys. 3. Install the left and right pulley covers with the mounting screws (Fig. 36). • Always operate engine–powered attachments at full throttle. 4.
Maintenance 6. Paint all scratched or bare metal surfaces. Paint is available from you Authorized Service Dealer. 7. Store the machine in a clean, dry garage or storage area. Remove both the ignition and “Key Choice” keys and keep them in a memorable place. Cover the machine to protect it and keep it clean. 9. Run the mower again for one to three minutes to remove excess water.
Troubleshooting PROBLEM Abnormal vibration. POSSIBLE CAUSES CORRECTIVE ACTION 1. Cutting blade(s) is 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. Contact Authorized Service Dealer. 1.
Troubleshooting PROBLEM PTO (cutter deck) belt comes off of pulleys,slips or fails. (continued) POSSIBLE CAUSES CORRECTIVE ACTION 8. PTO is being engaged when cutter deck is in tall uncut grass or weeds. 8. Engage PTO only in shorter or previously cut grass. 9. Cutter deck is overloaded because mulching or bagging requires more power. 9. Reduce ground speed when mulching or bagging. 10. Cutter deck is overloaded because too much grass is being cut at a time. 10.