Dover TWG TULSA WINCH 707W, Service Manual

7

OIL CHANGE 

Gearbox oil is drained by rotating the drum so that the drain plug 

(Item 33)

 is visible through the 

lower hole in the side plate

 (Item 50)

(See Fig 1)

.  Screw in a piece of 1" pipe to allow the oil to 

drain, and then with a hex wrench remove the drain plug located inside of the 1” pipe 

(See Fig. 2)

.  

Examine the used oil for signs of significant metal deposits and then dispose of it in a proper 

manner.  Remove the 1” pipe.   

Rotate the drum so that the port is visible through the upper hole in the side plate

.

  Install a 1” pipe 

with elbow into the upper hole in the side plate 

(See Fig. 3)

.  Remove the plug 

(Item 33)

 located in 

the center of the shaft.  Fill the gearbox with 1.00 quart of EP-90 oil.  Remove the pipe and elbow 

then replace the plugs 

(Item 33)

.  

See the Oil Chart on page 6 of this manual for the recommended 

oil type and grade for your application. 

Drain the brake section by removing the drain plug

 (Item 40) 

under the motor along with the vent 

(Item 30)

 above the motor 

(See Fig. 4)

.  Inspect the oil for signs of metallic particles and/or 

burning and reinstall the drain plug.  Fill with .25 quart of non-EP oil and reinstall the vent 

(Item 

30). See Oil Chart Pg. 6 this manual for recommended oil type and grade for your application.

WIRE ROPE  

Wire rope should be installed as shown in the drawing below.  Note that the wedge will satisfy 

cable diameters from 7/16" to 5/8", depending on how it is installed in the cable drum.