DR Power Tow-Behind 13.74 Pro-XL (August 2010 - August 2014) - Manual (Page 28)

28 DR ® LEAF and LAWN VACUUM
NOTE: The new Coupling comes in three pieces; Two rubber halves and one locking
ring. Even though the Ring can be centered over the two rubber halves before the
Coupling is installed onto the machine, it may be easier to install the ring after the
Engine has been bolted to the Frame. This allows you to take advantage of the
prying surface of the Coupling Flanges as described in the following steps.
7. Position the new Coupling, with the Ring positioned loosely over one end of
the Rubber, into the Coupling Flange that is mounted to the Impeller
Housing.
8. Slide the Engine and Engine Support until the holes in the end of the Engine
Support slide over the Studs in the Impeller Housing.
9. Secure the Engine Support to the Impeller Housing with the two Locknuts
using a 1/2" Wrench.
10. Secure the Engine to the frame with the Bolts, Flat Washers and Locknuts
(Bolts on bottom, Washers and Locknuts on top) using two 1/2" Wrenches.
11. Pry the Ring into position onto the Rubber Coupling halves with a large Flat
Head Screwdriver (Figure 52).
12. Replace the two Coupling Guards.
13. Reattach the Harness to the Frame with Cable Ties.
14. Reattach the Battery Terminals.
Replacing the Wheels
Tools Needed:
 Locking Pliers or Needle Nose Pliers.

Jack and Stand
1. Jack up the Frame and support it with Blocks or a Jack Stand so the Wheel is
off the ground.
2. Remove the Cotter Pin with Locking Pliers or Needle Nose Pliers (Figure 53).
3. Remove the Large Washer and Wheel.
4. Install the new Wheel.
5. Install the Large Washer and secure with the Cotter Pin (bend the ends of
the Cotter Pin to lock it onto the Axle.
Coupling
Ring
Figure 52
Rubber Coupling
Halves
Before performing any maintenance, repairs or inspection, you must first shut off the mower and leaf and lawn vacuum engines,
wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.
Washer
Figure 53
Cotter Pin
It is very important that the ring is in the groove of the coupling sleeve all the way around to properly hold the coupling together
and prevent failure.