DR PRO Assembly & Operating Instructions
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DR PRO Assembly & Operating Instructions

Trimmer/mower
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®
™
DR
TRIMMER/MOWER
Assembly & Operating Instructions
Models: "PRO", QUANTUM, STANDARD
Please read these instructions and the separate engine manual before you assemble and
®
™
use your DR
TRIMMER/MOWER
.

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  • Page 1 ® ™ TRIMMER/MOWER Assembly & Operating Instructions Models: “PRO”, QUANTUM, STANDARD Please read these instructions and the separate engine manual before you assemble and ® ™ use your DR TRIMMER/MOWER...
  • Page 3 And congratulations on your purchase of a new DR ™ TRIMMER/MOWER ® We have done our utmost to ensure that your DR will be one of the most trouble-free and satisfying pieces of equipment you have ever owned. Please let us know of any questions or problems you may have.

  • Page 5: Table Of Contents

    Table of Contents SAFETY INSTRUCTIONS ...............................5 Dress Appropriately.................................5 Preparation..................................5 Operating the Machine Safely ............................5 Safety with Gas-Powered Machines ..........................6 Warning to All California and Other Users ........................6 TRIMMER PARTS & COMPONENTS ..........................7 ASSEMBLY COMPONENTS............................8 ASSEMBLY ..................................9 STARTING & OPERATING ............................15 Electric-Starting................................15 Manual-Starting ................................15 Stopping the Engine...............................16...

  • Page 7: Safety Instructions

    Safety Instructions ® ™ We want you to enjoy years of productive use from your DR TRIMMER/MOWER . We don't want you to get injured, so please take a few moments to read the following guidelines for safely operating your new machine.

  • Page 8: Safety With Gas-Powered Machines

    · ® ™ As with any trimmer, the tips of the cutting cords on the DR TRIMMER/MOWER can throw sticks, small stones, gravel, and bits of debris for long distances at great velocity. The faster the cutting cords are spinning, the farther debris may be thrown. Do not move over loose materials such as gravel or mulch with the trimmer head spinning.

  • Page 9: Trimmer Parts & Components

    The following parts and assembly components should be in your DR TRIMMER/MOWER package. Please check your shipping box(es) and parts package(s) for the items listed below. If your shipment is incomplete or if you have any questions, please call us TOLL-FREE 1(800)DR- OWNER (376-9637). Assembly Components: 1—Upper Handlebar [#117771]...

  • Page 10: Assembly Components

    Assembly Components Figure 1 ® ™ TRIMMER/MOWER Assembly & Operating Instructions...

  • Page 11: Assembly

    Assembly WARNING: Do not attempt to start the engine until all assembly steps are complete, and you have ADDED GAS AND OIL to the engine. WARNING! Tools & Supplies Needed: • flat head screwdriver THIS MACHINE IS SHIPPED WITHOUT • 1/2" and 3/8" wrenches, adjustable OIL! TRACES OF OIL MAY BE IN wrench, or socket set RESERVOIR FROM FACTORY TESTING,...
  • Page 12 Step 2: Attach the Rubber Stone Guard 1. Take one of the two stone guard clamps and spread it open. Position it around the axle (Figure 5) and squeeze the ends together. Install the second clamp midway along the opposite side of the axle in the same way.
  • Page 13 3. Bring the upper handlebar section up and over the front end of the machine. Let it rest there (Figure 8). Caution: DO NOT add gas or oil to the engine at this time. Step 5: Install the Handlebars A) Lower Handlebar Note: There are 2 U-bolts, 4 washers, and 4 lock nuts in your parts bag that will be needed for the lower handlebar assembly.
  • Page 14 The height of the handlebar depends on many factors for each individual. However, it is crucial to find a height that allows the Mow- ™ Ball Support to glide along the ground and remain balanced without the operator having to push down or pull up on the handlebars.
  • Page 15 Step 8: Add Oil and Gas You must add oil before starting engine. There may be 1 to 2 ounces of oil WARNING!: left in your machine from factory testing. Check dipstick while adding oil to avoid over filling. Please refer to your Engine Manual and put the recommended amount of engine oil in the oil fill.
  • Page 16 Controls & Features Note: Standard Model with Briggs & Stratton engine shown. Your trimmer may look slightly different. Figure 16 ® ™ TRIMMER/MOWER Assembly & Operating Instructions...

  • Page 17: Starting & Operating

    Starting & Operating WARNING! THIS MACHINE IS SHIPPED WITHOUT OIL! TRACES OF OIL MAY BE IN RESERVOIR FROM FACTORY TESTING, BUT YOU MUST ADD THE RECOMMENDED AMOUNT OF OIL BEFORE STARTING ENGINE. Please Note: The Briggs & Stratton models are pictured below. On other models the primer bulb may be on the left side of the engine.

  • Page 18: Stopping The Engine

    3. Grasp the recoil starter handle (Figure 16), and slowly pull until resistance is felt. Next, pull the cord rapidly to overcome compression, prevent a kickback and start the engine. One or two pulls ® ™ usually starts the DR TRIMMER/ MOWER , but it may be necessary to repeat the priming. Stopping the Engine Move the throttle lever back to the STOP position (Figure 16).

  • Page 19: Using The Parallel Trimming Action (Pta ) Feature

    ™ Using the Parallel Trimming Action (PTA ) Feature By tilting the cutting head beyond the wheels, Parallel Trimming Action allows you to trim under fences and along shrub borders and buildings—those hard-to reach places that usually require pushing and pulling the machine. The wheels remain parallel to whatever is being trimmed, so you can also easily edge along curbs and sidewalks.

  • Page 20: Cutting Cords

    WARNING: Turn the engine off when installing or changing cutting cords. Two thicknesses of cutting cord ship with ® ™ your DR TRIMMER/MOWER : Heavy- duty (130 mil) Orange and Extra Heavy-duty (155 mil) Green. Figure 20 shows how the cords are installed at the factory.

  • Page 21: Trimming And Mowing Methods

    Trimming and Mowing Methods Many owners like to mow easy, open areas with their regular riding or walk-behind mower, then they finish trimming all the odd ® and hard-to-reach spots with the DR ™ TRIMMER/MOWER ® ™ The DR TRIMMER/MOWER discharges cut material to the right.

  • Page 22: Mow-Ball Support

    When using your PTA along garden edges, fences, and buildings, we recommend making your first ® ™ pass with the DR TRIMMER/MOWER in the regular mowing position, staying 4 to 8 inches from ™ the obstacle. Then, return for another pass with the machine cutting in the left or right PTA mode.

  • Page 23: Adjusting The Cutting Height

    · You can also try the method illustrated in Figure 24, especially for the green, 155 mil cord. This not only holds the cord tight, but also helps the cords cut better in larger diameter, tough and woody growth. · Another method is shown in Figure 25.
  • Page 24 WARNING: Before performing any maintenance procedures, the engine should be stopped and the spark plug wire disconnected. 1. Remove the orange, vinyl plug from the bearing housing's outer shaft (Figure 26). ™ 2. Insert a screwdriver into the hole (Figure 26) and rotate the Mow-Ball Support until the screwdriver fits in the second hole in the inner shaft, locking it in place.

  • Page 25: Wagner Anti-Wrap Device

    Support on the ground (Figure 30). ® ™ EASE the DR TRIMMER/MOWER into denser growth. If the material is too tough or woody and can't be cut, the cutting cords will wrap around it, wear down or even break off.

  • Page 26: Wet Conditions

    Wet Conditions Because there is no housing to restrict the ® flow of cut material, you can use your DR ™ TRIMMER/ MOWER to mow wet or heavy ® growth. The DR can also be used in damp conditions, like after a rain or in the early morning dew, without clogging or stalling.

  • Page 27: Maintenance

    For Engine Maintenance, Please Refer to the Engine Manufacturer's Owner's Manual. ® ™ IMPORTANT: Because of the conditions the DR TRIMMER/MOWER is used in, air filters and oil should be changed more frequently than is recommended in your Engine Manufacturer's Owner's Manual. Please follow these recommendations: Paper Air Cartridge Should be replaced every 25 hours of operation.

  • Page 28: Battery Care (Electric-Starting Models Only)

    To Connect the Battery Charger ® ™ 1. Detach the two battery wires going to the wiring harness on your DR TRIMMER/MOWER 2. Next, attach the black (-) battery charger wire to the black (-) wire on the battery. Then attach the red (+) battery charger wire to the red (+) wire on the battery.

  • Page 29: To Remove The Mow-Ball Support Assembly

    · The wiring harness consists of a set of wires that lead from the ignition switch to the battery. Disconnect and reconnect the battery wires (black to black and red to red) and check the wire connections at the key switch. · Call one of our Customer Service Representatives TOLL-FREE 1(800)DR-OWNER(376-9637) for assistance. ™...

  • Page 30: To Reassemble The Mow-Ball Support Assembly

    ™ To Reassemble the Mow-Ball Support Assembly WARNING: Before performing any maintenance procedures, the engine should be stopped and the spark plug wire disconnected. Caution: An improper installation may cause damage to the bearings. Please follow these directions carefully. Tool Needed: •...

  • Page 31: To Partially Lower The Bearing Housing Assembly (To Remove Debris)

    To Partially Lower the Bearing Housing Assembly (to remove debris) WARNING: Before performing any maintenance procedures, the engine should be stopped and the spark plug wire disconnected. Tools Needed: • 1/2" socket • 1/2" wrench If possible, set the machine up on a bench. Do not tip the machine all the way back on its handlebars unless you have drained the gas and oil.

  • Page 32: To Remove And Replace The Bearing Housing Assembly

    Figure 38 6. Call one of our Customer Service Representatives at TOLL-FREE 1(800)DR-OWNER(376-9637) for information about replacing the bearing housing assembly. To Remove and Replace the Bearing Housing Assembly WARNING: Before performing any maintenance procedures, the engine should be stopped and the spark plug wire disconnected.
  • Page 33 3. Flip the bearing housing over and detach the brake arm from the brake assembly and the brake actuator (Figure 40). 4. Pull the belt off the pulley (Figure 40). 5. Slide the Wagner Anti-Wrap bracket off the bearing housing. You may need to tap it to make it slide off.

  • Page 34: To Replace The Belt

    5. Set the new bearing housing assembly into place. Insert the three bearing housing bolts through the frame, and tighten the nuts (Figure 38). ™ 6. Reassemble the Mow-Ball Support assembly. See page 27 for instructions. To Replace the Belt Figures 44 &...

  • Page 35: To Adjust The Belt Tension Through The Trimmer Control Cable

    To Adjust the Belt Tension through the Trimmer Control Cable If the trimmer head stops spinning when the brake bar is engaged and the machine is operating under a heavy load, the belt may be too loose and the trimmer control cable may need to be adjusted to put more tension on it.

  • Page 36: To Adjust The Pta Feature

    ™ To Adjust the PTA Feature WARNING: Before performing any maintenance procedures, the engine should be stopped and the spark plug wire disconnected. Tools Needed: • 5/16" socket ™ It should be easy to engage the PTA Feature. ™ If you find it hard to release the PTA lever and pivot the frame to the side, loosen the axle nut one quarter turn or so (Figure 49).

  • Page 37: Troubleshooting

    Þ Is the throttle cable attached to the engine and moving freely? Þ If your engine still won’t start, call 1(800)DR- OWNER(376-9637) for advice and assistance. Þ Have you checked all the items under manual Engine won't start using electric-start start above? If not, do so.
  • Page 38 Drop it and clean it according to the To Partially Lower the Bearing Housing Assembly instructions in the maintenance section of this manual. Þ If your engine still lacks power, call 1(800)DR- OWNER(376-9637) for advice and assistance. Þ Lift the Mow-Ball ™...
  • Page 39 To Adjust the Belt Tension through the Trimmer Control Cable in the maintenance section of this manual. Þ If none of the above helps, call 1(800)DR- OWNER(376-9637) for advice and assistance. Þ Is the trimmer head control disengaging? When...
  • Page 40 BEAVER ® BLADE attachment, usable on the Standard, Quantum and "Pro" model trimmers only. Þ Is the axle binding when you shift into PTAä Parallel Trimming Action is difficult ® mode? Spray some FLUID FILM at the points where the axle slides on the frame.

  • Page 41: Parts List

    Parts List Ref # Part # Description Ref # Part # Description 116891 Main Frame 120171 Set Screw, 5/16"-18 x 5/16" 125121 Bearing Housing Assembly 125381 Head Pulley 117771 Upper Handlebar 118691 Hex Nut, 5/16" 117741 Lower Handlebar Ext. 118731 Nylon Lock Nut 10-24 125141 Wheel Retaining Ring...

  • Page 42: Schematic Drawings

    Schematic Drawings Figure 50 ® ™ TRIMMER/MOWER Assembly & Operating Instructions...
  • Page 43 Figure 51 ® ™ TRIMMER/MOWER Assembly & Operating Instructions...
  • Page 44 ® Daily Check List for the DR TRIMMER/MOWER ™ ® To help maintain your DR for optimum performance, we recommend you follow this check list each time you use it. 4 GAS: Fill the gas tank with clean, fresh, unleaded gas. Be careful not to spill gas on the engine shield.

This manual is also suitable for:

Pro quantumPro standard

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