FORM NO. 3321-696 ProLine 52” Mower for Mid-Size Traction Unit Model No. 30151 – 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 Page Safety and Instruction Decals . . . . . . . . . . . . . . 2 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Loose Parts . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installing the Castor Wheels . . . . . . . . . . . 4 Installing the Carrier Frame to the Traction Unit 4 Installing the Cutting Deck . . . . . . . . . . . . 5 Installing the Drive Belt . . . . . . . . . . . . . . . 5 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. See Traction Unit Operator’s Manual for Glossary of Safety Symbols " ! ! #"" # " %-. , " " " ! ! # ! ! %-. , " " " ! # " # !! ! ! $ ! # " ! #"" # " %-.
Assembly Loose Parts Note: Use the chart below to identify parts used for assembly. DESCRIPTION QTY.
Assembly Installing the Castor Wheels 1. 2. 3. Place the (2) thrust washers and spacer onto the castor wheel fork (Fig. 1). Insert the castor wheel fork into the carrier frame mounting tube (Fig. 1). 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 holes with the mounting holes in the traction unit frame (Fig. 2). 2.
Assembly Installing the Cutting Deck Installing the Drive Belt 1. Position the cutting deck under the carrier frame. 1. 2. Mount the cutting deck to the carrier frame with four (4) clevis pins and hairpin cotters (Fig. 3). Remove the hand knobs holding the deck cover to the top of the cutting unit and remove the deck cover. 2. Install the drive belt around the drive pulley on the traction unit and the upper groove of the center spindle pulley. The belt must be between the belt guides (Fig. 4). 3.
Assembly 4. 5. Thread two (2) 1/2” jam nuts approximately 9” (22.8 cm) up on each adjusting shaft (Fig. 5). 3 4 Slide a 1/2” spacer, spring and bushing onto each adjusting shaft. Make sure to install the bushing with the flange end against the spring (Fig. 5). 1 2 1 3 5 6 4 5 m–2541 2 Figure 6 m–2542 Figure 5 1. 2. 3. 4. 6. 1/2” Jam Nut (2) 1/2” Spacer Spring Bushing 5. Adjusting Shaft 6.
Operation Side Discharge or Mulch Grass Engaging the Mower Blades (PTO) The mower has a hinged grass deflector that disperses clippings to the side and down toward the turf. The blade control switch (PTO) in conjunction with the blade control bail engages and disengages power to the electric clutch and mower blades. 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 Adjusting the Height-of-Cut Adjusting Gage Wheels The height-of-cut is adjustable from 2” to 5” (51 to 127 mm) in 1/2-inch (13 mm) increments by relocating the clevis pins in different hole locations in brackets at each corner of the cutting unit (Fig. 9). The gage wheels must be adjusted in the proper hole location for each height-of-cut position. 1. After adjusting height-of-cut remove nut and washer while holding stud with wrench (Fig. 10).
Operation Adjusting Center Gage Wheels The gage wheels must be adjusted in the proper hole location for each height-of-cut position. 1. After adjusting height-of-cut remove bolt and nut (Fig. 11). 2. Select a hole position so the gage wheels are 3/8” (9.5 mm) off the ground for the height-of-cut to be used (Fig. 11). 3. Reinstall the bolt and nut (Fig. 11). 3 1 2 m–4124 Figure 11 1. Center Gage Wheels and Spacer 2. Nut 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 25 Storage Hours Service X X Belts – check for wear/cracks X Blade Spindle Bearings – grease X Idler Arm – grease X Castor Wheels – grease X Mower Housing – clean Notes 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 12). If the edges are not sharp or have nicks, remove and sharpen the blades. Refer to Sharpening the Blades on page 13. 1. 2. Inspect the blades, especially the curved area (Fig. 12). If you notice any damage, wear, or a slot forming in this area (item 3 in Fig. 12), immediately install a new blade. Rotate the blades until the ends face forward and backward (Fig. 13).
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. 16). 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. 18). Measure at “C” and “D” locations (Fig. 18) from a level surface to the cutting edge of the blades (Fig. 19). 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. 20). Setting the Side-to-Side Leveling Check the side-to-side leveling of the cutting unit. 1. Check the tire pressure. 2.
Maintenance Greasing the Bearings and Bushings The cutting unit must be lubricated regularly. Refer to the Service Interval Chart on page 11. Grease with No. 2 general purpose lithium base or molybdenum base grease. 1. Stop the engine, remove the key and disconnect the spark plug wire(s) from the spark plug(s). 2. Grease the fittings on the three spindle bearings and the idler arm (Fig. 24). Note: 3. 1. Stop the engine, remove the key and disconnect the spark plug wire(s) from the spark plug(s). 2.
Maintenance Replacing the Drive Belt 2 1 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. Stop the engine, remove the key and disconnect the spark plug wire(s) from the spark plug(s). 2. Remove the hand knobs holding the deck cover to the top of the cutting unit and remove the deck cover. 3.
Maintenance Replacing the Castor Wheel Fork Bushings 4. Insert a pin punch into the mounting tube and carefully drive out the bushings (Fig. 29). 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. 30). 2.
Maintenance Replacing the Grass Deflector Storage 1. Remove the locknuts, bolts and springs holding the deflector mounts to the pivot brackets (Fig. 31). 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. 31).
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. 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.
