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Before Loading

 

1.

  Before loading the towed vehicle, make certain that 

the  ramps  have  been  adjusted  to  correspond  to  the 
width of the towed vehicle’s tires. 
 

  See the “Initial Assembly” section, steps 10 and 11,  

for detailed instructions on how to adjust the ramps.
 

2.

  Check the vehicle weight — the tow dolly is rated 

at a maximum of 4,250 pounds. Verify that the weight 
of  the  towed  vehicle  and  all  of  its  contents  does  not 
exceed 4,250 pounds.
 

3.

  Check the trailer ball height — 

 

  Make  certain  that  the  trailer 

ball  height  is  19  inches,  plus 
or  minus  one  inch.  Ball  heights 
outside  of  this  range  can  create 
poor  towing  characteristics,  such 
as  sway  and  fishtailing.  In  ad-
dition,  incorrect  ball  height  can  cause  the  ramps  to 
damage  the  bottom  of  the  towed  vehicle  or  drag  on 
the road over bumps and dips. 
 

  The  coupler  requires  a  two-inch  hitch  ball  with  a 

5,000 pound capacity.

Loading

 

1.

  Park the motorhome on a flat, level surface. Make 

certain that the motorhome engine is off, with the trans-
mission in park, and that the emergency brake is on.
 

2.

  Position the dolly in line with the motorhome and 

place the coupler over the trailer ball. Make certain that 
the coupler socket fully encloses the hitch ball. Secure 
the coupler to the ball by fully lowering the coupler lever 
to a horizontal position (Figure 10). 
 

  Pull  up  on  the  tow  dolly  tongue  to  verify  that 

the coupler is properly latched and is securely attached 
to the trailer ball. 

 
 

Always connect the dolly to the motorhome be-

fore loading the towed vehicle. It is nearly impos-
sible  to  control  the  combined  weight  of  the  dolly 
and  towed  vehicle  when  disconnected  from  the 
motorhome. Attempting to do so may cause prop-
erty damage, personal injury or even death.

 

3.

  Attach the safety chains to the receiver on the mo-

torhome and cross the chains, as shown in Figure 10. 
Crossing the safety chains will help prevent the tongue 
from  catching  on  the  road  in  case  of  disengagement. 
Leave just enough slack in the chains for turning cor-
ners.

  4.

  Connect  the  tow  dolly’s  wiring  plug  to  the  mo-

torhome’s socket and check the lights for proper func-
tion.

18"-20"

ground level

USING YOUR TOW DOLLY

7

 

5.

  Remove the pivot pin (Figure 3), and tilt the ramps  

to the ground.

 

The ratchet must be in the down position when 

loading.  If  the  ratchet  is  left  in  the  up  position, 
it  may  catch  on  the  towed  vehicle,  resulting  in 
damage to the vehicle. 

 

6.

  If the towed vehicle has a rock guard, spoiler, air 

dam or other undercarriage component, check to ensure 
that it will clear the ramps and deck without damage.
 

  Now,  align  the  towed  vehicle  with  the  dolly  and 

have  an  assistant  carefully  guide  you  up  the  ramps, 
being  careful  to  keep  the  towed  vehicle  centered.  As 
the towed vehicle reaches the top, the ramps will au-
tomatically raise. Continue forward until the tires touch 
the ramp stop.  

 

All towed vehicles must be loaded forward, with 

the steerable wheels on the tow dolly. The front end 
of the towed vehicle is aligned with a small amount 
of “toe-in” to help keep it in a straight line as you 
drive. By towing backwards you reverse the effect, 
causing  the  towed  vehicle  to  wander,  sway  and 
fishtail. This can cause loss of control, resulting in 
property damage, personal injury or even death.

 

7.

  Now, lock or otherwise secure the steering wheel 

so  that  the  front  end  cannot  pivot  on  the  dolly.  If  the 
vehicle is not equipped with a locking steering column, 
you  must  secure  the  steering  wheel  so  that  it  cannot 
turn while being towed.

  Failure to lock the steering wheel will allow the 
towed vehicle to pivot on the bed, causing it to hit 
the fender and wheel assemblies of the dolly. Severe 

continued on next page

Figure 10

Summary of Contents for Tow Dolly RM3477

Page 1: ...Entire contents of manual must be read by owner Towing and Suspension Solutions ROADMASTER Inc 6110 NE 127th Ave Vancouver WA 98682 800 669 9690 fax 360 735 9300 roadmasterinc com Owner s Manual...

Page 2: ...aps fit 12 16 tires Coupler information 2 ball diameter 5 000 pound capacity Optimum trailer ball height 19 Max weight of towed vehicle 4 250 lbs Actual cargo capacity 2 550 lbs Required trailer ball...

Page 3: ...you assemble the dolly pre assembly instructions 3 Initial Assembly 4 6 Using Your Tow Dolly 7 10 Before Loading 7 Loading 7 9 TABLE OF CONTENTS 1 Towing 9 Unloading the Dolly 9 Pulling the Dolly Emp...

Page 4: ...200 miles Torque every 3 000 miles thereaf ter 11 Inspect both tire s air pressure every 3 000 miles Inflate to the recommended psi listed on the tire side wall Do not tow on improperly inflated tires...

Page 5: ...mbler must show the owner how to properly load unload and tow his vehicle 7 The assembler must caution the owner to use a trailer ball ball mount and receiver that are rated at 5 000 pounds or more 8...

Page 6: ...can result if the brake drum spindle hub assemblies separate 2 Attach the fenders position both fenders so that the three pre drilled holes Figure 2 align to the three pre drilled holes in the fender...

Page 7: ...ach each U bracket to the ramps with two of the 13 x 1 bolts flat washers lock washers and nuts Position the flat washers and lock washers to the inside Torque the 13 x 1 bolts to 78 ft lbs 11 Slide t...

Page 8: ...may be damaged 13 Position the deck spacer Figure 8 over the pre drilled 1 1 8 hole at the center of the axle 14 Position the deck over the axle as shown in Figure 9 so that the pre drilled holes at t...

Page 9: ...he safety chains to the receiver on the mo torhome and cross the chains as shown in Figure 10 Crossing the safety chains will help prevent the tongue from catching on the road in case of disengagement...

Page 10: ...el drive make certain it can be towed with the rear wheels on the ground without damaging the transmission If it can be safely towed put the towed vehicle in neutral If not remove the driveshaft and p...

Page 11: ...aps are not tightened the towed vehicle may separate which will cause property damage personal injury or even death 11 Connect the auxiliary lighting for the rear of the towed vehicle Test the lightin...

Page 12: ...ert the plug 5 Coupler adjustment check and maintain every 3 000 miles or every six months if the coupler does not properly engage the ball simply tighten the lock nut Do not overtighten the nut or th...

Page 13: ...certain that the strap is routed through the buckle as shown in Figure 13 before towing The strap will not secure the towed vehicle if it is not routed through the buckle correctly Failure to properl...

Page 14: ...ucts b use parts or products of original or improved design in the repair or replacement If ROADMASTER repairs or replaces a product its warranty continues for the remaining portion of the original Wa...

Page 15: ...t Heavy duty solid steel construction for trouble free performance durability greater strength and safety in securing your towed vehicle Zinc plating helps prevent rust and corrosion Non binding desig...

Page 16: ...ed to 90 ft lbs The Accu Lube hubs have been lubricated Tire pressure is correct for towing loaded or unloaded The nuts securing the fenders are tight The nuts and bolts securing the tongue and stabil...

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