Tulsa RUFNEK 130, Service Manual

9

C. DRUM SECTION DISASSEMBLY 

1.  To remove the drum, first disconnect the 

cable from the U-bolt (43) and lay aside. If 
removing the drum from the motor end with 
the motor and brake disassembled, first 
remove the cotter keys (12) and clevis pins 
(15) connecting the yoke (81) to the bracket 
(97) and air cylinder (17).   

You may need to remove the 

air lines, so it’s a good idea to 

mark them for re-assembly. 

 
2.  Support the weight of the drum with a hoist. 

Remove the four cap screws (70) along with 
the nuts and washers (71, 72) on the bottom 
of the brake housing (16).  Disconnect the 
airline running from the air cylinder (76) to 
the brake housing (16).  Remove the brake 
housing by sliding the housing off of the 
output shaft (20).  At this time you will need 
to remove the two cap screws (91), nuts and 
washers (85 & 86) from the frames (73 & 
74). Do not remove the air cylinder (68) yet.  
Disconnect the airline from the backside of 
the brake housing (16) that goes to the 

brake band air cylinder.  You can now 
remove the brake band assembly (77).  Note 
which frame the mounting bolts are on for 
re-assembly.  Inspect and replace if needed. 

 
3.  Remove the outer thrust collar (48) by 

loosening three set screws (106). 

 
4.  Remove the yoke (81) and sliding clutch 

(13).  Remove the three keys (47) and the 
inner thrust collar (24).  Remove the drum 
using a hoist.  Inspect the bushings (19) in 
both ends of the drum.   

You should also inspect the bushing 

and seal (40, 41) that are located 

in the end of the brake housing. 

 
5.  Inspect or replace the drum clutch (14) at 

this time by removing six capscrews (45).  If 
you replace the clutch, make sure to torque 
the capscrews to the specified torque upon 
re-assembly.  (See torque specifications 
chart on page 28 of this manual.)