dr trimmer mower Pro User manual

DR®TRIMMER/MOWER™Assembly & Operating Instructions i
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. We want to answer or correct them as quickly
as possible. (When you do call or write, please have your
serial number and/or order number handy—it will speed
things up!) We also hope to hear from you on how much
you like your new helper.
And please tell your friends about your new DR®
TRIMMER/ MOWER™. Having DR®Owners spread the
word about our products and our way of doing business is
the best advertising we can have, and it's the best way to
help us provide even better service in the years to come.
Thanks once again!
for all of us at...
COUNTRY HOME PRODUCTS®

DR®TRIMMER/MOWER™Assembly & Operating Instructionsii
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.
Dress Appropriately
·Always wear protective goggles (provided with your DR®TRIMMER/MOWER™) while
mowing, to protect your eyes from possible thrown objects.
·Wear shoes with non-slip treads when using your DR®TRIMMER/MOWER™. If you have
safety shoes, we recommend wearing them. Do not use the machine while barefoot or
wearing open sandals.
·Wear long pants while trimming, and avoid wearing loose clothing or jewelry which might
get caught on the mower's moving parts.
·Use ear muffs or ear plugs to protect your valuable hearing.
Preparation
·Read these Assembly & Operating Instructions and the engine manufacturer's owner's
manual before you use the DR®TRIMMER/MOWER™. Become familiar with the controls,
engine and service recommendations to ensure the best performance from your machine.
·Inspect the area you'll be working in for hidden objects such as large rocks, logs, rope, wire,
garden tools, etc., and remove these obstacles before mowing. Do not attempt to mow over
obstacles as this could damage the machine and cause injury.
Operating the Machine Safely
·Only use the DR®TRIMMER/MOWER™for trimming and mowing grass, weeds, and other
growth as specified in this manual.
·Use only manufacturer-recommended replacement parts and accessories.
·Never bend, cut, fit, weld, or alter the DR®TRIMMER/MOWER™in any way.
Modifications to your machine could cause personal injuries and property damage, and may
void your warranty.
·ALWAYS shut off the engine and remove the spark plug wire prior to making any
adjustments to the machine. If you have to stop to remove grass or debris from the underside
of the deck, ALWAYS disconnect the spark plug wire first.
·The exhaust area on the engine becomes very hot. Allow the engine to cool before doing
maintenance or making adjustments.
·When operating over uneven terrain and slopes, use EXTREME CAUTION and ensure solid
and firm footing at all times.
·Use extra caution when mowing in wet, slippery conditions.
·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. Doing so could
cause personal injury or property damage from thrown objects.

DR®TRIMMER/MOWER™Assembly & Operating Instructions iii
·Turn off the engine whenever you leave the operating position. Never leave the engine
running when refueling, changing cords or checking, cleaning or working on the machine.
·Never allow children or animals near the work area. Keep at least 50 feet clear of
bystanders, and always turn the machine off when someone approaches to avoid causing
injury from thrown objects.
·Never allow children or people unfamiliar with these instructions to use the DR®
TRIMMER/ MOWER™.
·Be cautious when using your DR®TRIMMER/MOWER™around fencing, wires, ropes, and
hoses. It is possible that these and other debris can become wound around the line plates of
the machine, potentially damaging the bearings or injuring the operator.
·Use the machine only in daylight or good artificial light.
·Never operate the machine with a damaged shield or without the shield in place.
·Do not operate the machine when under the influence of alcohol or medication.
·Watch for traffic when mowing near roadways.
Safety with Gas-Powered Machines
·Do not run the engine in an enclosed area or without proper ventilation.
·Store all fuel in containers specifically designed for this purpose. Plastic containers are more
likely to prevent sediment and condensation problems.
·Refuel outdoors only, and do not smoke while refueling or operating the machine.
·If gas is spilled, do not attempt to start the engine. Move the machine away from the area of
the spill and avoid creating any source of ignition until the gas vapors have dissipated. Wipe
up any spilled fuel to prevent a fire hazard, and properly dispose of the waste.
·Allow the engine to cool completely before storing in any enclosure. Never store the
machine with gas in the tank near an open flame or spark.
·Do not change the engine governor settings or modify the engine speed.
·Some state and local regulations require the use of a spark arrester on gas powered
engines. Contact your local fire marshal or forest service for specific information
pertaining to your area. If you are required to use a spark arrester, please contact one
of our Customer Service Representatives for assistance in obtaining and installing one.
Warning to All California and Other Users
Under California and Washington State laws, and the laws of some other states, you are not
permitted to operate an internal combustion engine using hydrocarbon fuels without an engine
spark arrester. All DR®TRIMMER/ MOWERS shipped to California and Washington state are
provided with spark arresters. Failure of the owner/operator to maintain this equipment in
compliance with state regulations is a misdemeanor under California law and may be in violation
of other state and/or federal regulations. Contact your local fire marshal or forest service for
specific information in your area.

DR®TRIMMER/MOWER™Assembly & Operating Instructionsiv
Table of Contents
SAFETY INSTRUCTIONS..............................................................................................................................................II
Dress Appropriately........................................................................................................................................................ ii
Preparation...................................................................................................................................................................... ii
Operating the Machine Safely......................................................................................................................................... ii
Safety with Gas-Powered Machines .............................................................................................................................. iii
Warning to All California and Other Users ................................................................................................................... iii
TRIMMER PARTS & COMPONENTS ..........................................................................................................................1
ASSEMBLY COMPONENTS...........................................................................................................................................2
ASSEMBLY ........................................................................................................................................................................3
CONTROLS & FEATURES .............................................................................................................................................9
STARTING & OPERATING..........................................................................................................................................10
Electric-Starting.............................................................................................................................................................10
Manual-Starting .............................................................................................................................................................10
Stopping the Engine.......................................................................................................................................................11
Engaging the Trimmer Head..........................................................................................................................................11
Stopping the Cords Spinning .........................................................................................................................................11
Using the Parallel Trimming Action (PTA™) Feature ...................................................................................................12
Cutting Cords.................................................................................................................................................................13
Cord Tips.......................................................................................................................................................................15
Adjusting the Cutting Height.........................................................................................................................................16
Mow-Ball™Support.......................................................................................................................................................16
Adjusting the Handlebar ................................................................................................................................................16
Obstacles........................................................................................................................................................................17
Heavy Growth................................................................................................................................................................18
Wet Conditions ..............................................................................................................................................................18
Very Dry Conditions......................................................................................................................................................18
Slopes.............................................................................................................................................................................18
Windrows.......................................................................................................................................................................19
Firebreaks.......................................................................................................................................................................19
End-of-Season Garden Clean-Up...................................................................................................................................19
MAINTENANCE..............................................................................................................................................................20
Regular Maintenance.....................................................................................................................................................20
Battery Care (Electric-Starting Models Only) ...............................................................................................................21
To Remove the Mow-Ball™Support Assembly.............................................................................................................22
To Reassemble the Mow-Ball™Support Assembly.......................................................................................................23
To Partially Lower the Bearing Housing Assembly (to remove debris)........................................................................24
To Check the Bearing Housing Assembly for Damage.................................................................................................24
To Remove and Replace the Bearing Housing Assembly .............................................................................................25
To Replace the Belt........................................................................................................................................................27
To Adjust the Belt Tension through the Trimmer Control Cable ..................................................................................28
To Adjust the PTA™Feature..........................................................................................................................................29
TROUBLESHOOTING...................................................................................................................................................30
PARTS LIST.....................................................................................................................................................................34
SCHEMATIC DRAWINGS ............................................................................................................................................36
DAILY CHECKLIST FOR THE DR®TRIMMER/MOWER™...........................................................BACK COVER

DR®TRIMMER/MOWER™Assembly & Operating Instructions 1
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 [#143641], Commercial Model, or
[#144071], PRO Model
1—Lower Handlebar [#143631], Commercial Model, or
[#144061], PRO Model
2—Handlebar Adjuster Assemblies [#145801] in separate plastic bag
1—Axle [#114261]
1—Rubber Stone Guard [#116801]
1—PTA™Lever [#118221]
1—Acrylic Shield Assembly [#120521]
2—Wheels [#139861], Commercial Model, or
[#121761], PRO Model
Parts Bag Contents:
2—Wheel Retainer Rings [#119551]
2—Stone Guard Clamps [#131031]
1—Black Nylon Axle Washer [#121521]
4—5/16" Washers [#121691]
5—Lock Nuts 5/16"-18 (larger size) [#110761]
2—Set Screws 1/4"-20 Square Head [#120161]
7—Slotted Hex Head Bolts 10-24 x 5/8" Long [#114781]
7—Lock Nuts 10-24 (smaller size) [#118731]
2—U-Bolts [#114851]
1—PTA™Lever Grip [#117491]
Please refer to Figure 1 on the next page when preparing to assemble your DR®TRIMMER/
MOWER™. We recommend laying the parts out in sets, as we have shown them, before
assembly.

DR®TRIMMER/MOWER™Assembly & Operating Instructions2
Assembly Components
Figure 1

DR®TRIMMER/MOWER™Assembly & Operating Instructions 3
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.
Tools & Supplies Needed:
• flat head screwdriver
• 1/2" and 3/8" wrenches, adjustable
wrench, or socket set
• 7/16" wrench (Commercial Model)
• pliers
• SAE30 High Detergent motor oil
• funnel (preferably with filter)
• unleaded gasoline
Step 1: Install the Axle
1. Start with the orange housing upside
down. Leave the packaging on the
front end in place to balance the
machine during assembly.
2. Place the black nylon axle washer
over the axle stud at the center back
of the housing (Figure 2).
3. Insert the axle through the slot in the
outside of the housing so the plate
faces the axle stud (Figures 2 & 3).
4. Center the axle and slide the hole in
the notched plate over the stud so that
it rests flush against the nylon
washer. Be sure the axle is seated on
the axle stud solidly (Figure 3).
5. Screw a 5/16" lock nut onto the axle
stud using a 1/2" wrench or socket.
Tighten it until there is resistance, then
back off 1/2 turn. [If the bolt is too
tight, it will be hard to operate the
Parallel Trimming Action (PTA™)
Feature.]
Figure 2
Figure 3
WARNING!
THIS MACHINE IS SHIPPED WITHOUT OIL!
TRACES OF OIL MAY BE IN RESERVOIR
FROM FACTORY TESTING, BUT YOU MUST
ADD OIL BEFORE STARTING ENGINE. FILL
RESERVOIR SLOWLY, CHECKING DIPSTICK
FREQUENTLY TO AVOID OVERFILLING.

DR®TRIMMER/MOWER™Assembly & Operating Instructions4
Step 2: Attach the Rubber Stone Guard
1. Take one of the two stone guard clamps and position it around the axle (Figure 4). Install the
second clamp midway along the opposite side of the axle in the same way. Turn the open
ends of the clamps upward.
2. Holding the rubber stone guard vertically over the axle, slip one side of the stone guard in
between the clamp end so that the hole in the guard is aligned with the holes in the clamp.
Insert a 5/8" long bolt and attach a lock nut (Figure 5). Tighten with a 3/8" wrench or socket
and screw driver until the threads show. Do not over tighten. Repeat on the other side. The
stone guard should swing freely from the axle.
Step 3: Install the Wheels
1. Mount each wheel on the axle. Push
the wheels firmly against the axle
stop.
2. Place a retaining ring on the axle,
against the wheel, and tighten the set
screw (Figure 6) with a wrench or
pliers. Repeat on the other side.
Step 4: Set the Machine
Upright
Note: Be careful not to kink, twist or
stretch the control cables.
1. Remove the packaging from the front
end.
2. Stand at one side of the machine, holding on to one wheel with one hand, and the nose of the
machine with the other. Lift the nose of the machine up and over until the Mow-Ball™
Support is resting on the ground and the machine is upright (most of the weight is on the
wheels during this maneuver).
Figure 4 Figure 5
Figure 6