Tulsa RUFNEK 15 User manual

SEL-0044-001.DOC
REV-0 July 2020
RUFNEK 15
AND
MODEL 10
SERVICE MANUAL
GENERAL INFORMATION .......................................................................................................................... 4
INTRODUCTION AND THEORY OF OPERATION ...............................................................................................................4
ASSEMBLY NUMBER EXPLANATION.................................................................................................................................4
WINCH BREAK-IN ................................................................................................................................................................4
MODEL CODES ........................................................................................................................................... 5
MAINTENANCE............................................................................................................................................ 6
OIL LEVELS..........................................................................................................................................................................7
BRAKE ADJUSTMENT .........................................................................................................................................................8
DISASSEMBLY ............................................................................................................................................ 9
RUFNEK 15 BRAKE DISASSEMBLY....................................................................................................................................9
MODEL 10 BRAKE DISASSEMBLY......................................................................................................................................10
CLUTCH AND DRUM DISASSEMBLY..................................................................................................................................11
GEARBOX DISASSEMBLY ..................................................................................................................................................11
GEAR INSPECTION INSTRUCTIONS..................................................................................................................................12
ASSEMBLY ................................................................................................................................................ 13
GEARBOX ASSEMBLY ........................................................................................................................................................13
MODEL 10 BRAKE ASSEMBLY ...........................................................................................................................................14
RUFNEK 15 BRAKE ASSEMBLY..........................................................................................................................................14
CLUTCH AND DRUM ASSEMBLY........................................................................................................................................14
TROUBLESHOOTING................................................................................................................................ 15
BILL OF MATERIAL................................................................................................................................... 16
TORQUE SPECIFICATIONS CHART ........................................................................................................ 18
CLUTCH INSPECTION .............................................................................................................................. 19
ISOMETRIC DRAWING.............................................................................................................................. 20
RUFNEK BRAKE AND HYDRAULIC MOTOR VIEWS ............................................................................. 21
DESIGN SERIES 001

2
FAILURE TO HEED THE FOLLOWING WARNINGS MAY RESULT IN
SERIOUS INJURY OR DEATH.
The safety of the winch operator and ground personnel should always be of great
concern, and all necessary precautions to insure their safety must be taken. The
primary mover and the winch must be operated with care and concern for the
equipment and the environment and with a thorough knowledge of the equipment and
its performance capabilities must be understood. These general safety guidelines are
offered, however local rules and regulations or national standards may also apply.
Recommended references are, but not limited to, ANSI B30, OSHA 1910, AWS D 14.3,
and SAE J706.
Additional information can be found at http://www.team-twg.com/TulsaWinch/
Mounting:
Winch mounting must be secure and able to withstand the applied loads.
•The stability of the mounting system must be approved by a qualified person.
•All welding should also be done by a qualified person.
•Winch mount must be flat so as not to induce binding.
•The flatness must not exceed 1/16 inch across the mounting surface of the winch
itself.
Guards must be placed on all open drives in the case of mechanical winches.
Insure that all hydraulic hoses, valves and fittings are rated to winch manufacturer’s
operating pressures.
Relief valves should be set to winch manufacturer’s specifications.
Insure that all PTO’s and drivelines are sized appropriately for the winch manufactures
speed and torque specifications.
Indicates an imminently hazardous situation
which, if not avoided, will result in death or serious
injury.
Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious
injury.
Indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate
injury or property damage.
Indicates information or a company policy that
relates directly or indirectly to the safety of
personnel or protection of property.

3
Operator:
Must read and understand the operating and service manual.
Both the SERVICE MANUAL and OPERATING AND MAINTENANCE MANUAL
are available online at http://www.team-twg.com/TulsaWinch/
Must never lift or move people with this winch.
This winch is not designed or intended for any use that involves moving people.
Must stay clear of the load at all times.
Ground personnel should remain a safe distance from the load and winch cable
at least 1 ½ times the length of cable measured from the winch to the load.
Must stay clear of the cable at all times.
A broken cable can cause serious injury or death.
Must avoid shock loads.
Shock loads can impose a strain on the winch that can be many times the design
rating.
Must be aware of the fleet angle of the winch.
All loads should only be pulled with the load line perpendicular to the drum shaft,
this is to avoid excessive stresses on the winch and will help prevent the cable
from building on one side of the drum flange.
Must wear personnel protective equipment (PPE) if required.
Check the local, state and federal regulations for compliance.
Must insure that the drum clutch is fully engaged before hoisting.
A visual inspection of the drum clutch engagement is required before each
winching operation.
Must rig all loads secure before winching.
Pull the load line taut and inspect the condition of load for stability.
Must inspect the drum brake if equipped.
The drum brake is not a load holding device it is design to prevent over spooling
of the drum and causing bird nesting of the cable on the drum. Inspect the brake
for wear of the lining and the actuation method.
Must inspect the load control brake.
These winches can be equipped with two (2) forms of dynamic braking. The
worm brake is one method and is adjustable for pay-out load control. Before a
load is handled the load should be pulled tight and stopped to check this brake.
The second method is a hydraulic lowering control that is not field adjustable.
The same method should be used to check this brake.
Operation:
•All winch controls must be well marked for function to avoid confusion.
•Insure that the PTO is disengaged when the winch is not in use.
•All winch controls must be located to provide the operator with a clear view of the
load.
•The clutch must be inspected daily for proper operation.
•The winch cable should be inspected daily for serviceability.
•A minimum of five wraps of tightly wound cable must remain on the drum.

4
GENERAL INFORMATION
GENERAL INFORMATIONGENERAL INFORMATION
GENERAL INFORMATION
INTRODUCTION AND THEORY OF OPERATION
INTRODUCTION AND THEORY OF OPERATIONINTRODUCTION AND THEORY OF OPERATION
INTRODUCTION AND THEORY OF OPERATION
The Tulsa worm gear winch is operated by turning the input of the worm using a
hydraulic motor or PTO driven sprocket and chain. The winch utilizes the adjustable,
spring applied, multiple disc oil brake that activates only during pay-out to provide
maximum efficiency during pay-in. The torque is transferred from the gearbox through
the drum shaft which is keyed to a mechanically actuated sliding clutch that when
engaged transfers the torque to the drum.
ASSEMBLY NUMBER EXPLANATION
ASSEMBLY NUMBER EXPLANATIONASSEMBLY NUMBER EXPLANATION
ASSEMBLY NUMBER EXPLANATION
This manual is for design series 001. In the case of a major design change
implementation, a new design series designation number will be issued for the winch. A
new manual will also be created for that specific design series.
WINCH BREAK
WINCH BREAKWINCH BREAK
WINCH BREAK-
--
-IN
ININ
IN
Winches, like any other kind of machinery, require a “break-in” to perform well and to
maximize their life. The following guidelines should be used in the break-in of Tulsa
Winches.
Use extreme care when first spooling cable onto the winch. DO NOT run the winch
at high speeds when performing this operation. Make sure that the cable is payed-out in
a straight line (to prevent kinks) and SLOWLY pay-in the winch to install the cable.
DO NOT exceed one half rated load or one half rated line speed for the first thirty
minutes of operation. This will insure that the worm and gear have an opportunity to
wear in properly. Periodically, check the gearbox for temperature rises and allow the
winch to cool down between pulls. Worm gear winches are designed and intended for
intermittent duty application only; using them in extremely long pulls may generate
excessive heat and shorten the life of the winch.
80519 001
ASSEMBLY # SERIES
DESIGN

5
MODEL CODES
MODEL CODESMODEL CODES
MODEL CODES
Gear Type
W=Worm
P=Planetary
Drive Type
H=Hydraulic
M=Mechanical
Gearbox Position
L=Left
R=Right
(viewed from rear of truck)
Input Shaft Location
F=Front
R=Rear
X=Does not apply
(viewed from rear of truck)
Cable Spooling
O=Over Drum
U=Under Drum
(viewed from rear of truck)
Clutch Device
M=Mechanical
A=Air
Motor Type
1. Single Speed Gear Motor
2. Two Speed Gear Motor
3. Single Speed Geroler Motor
4. Two Speed Geroler Motor
5. Piston
6. Vane
X. No Motor
RN15 W M R F O M X
Winch Type
M=Mechanical
H=Hydraulic
No. of Worm Starts
S=Single
D=Double
Worm Angle
L=Left
R=Right Input Shaft Location
F=Front
R=Rear
X=Does not apply
(viewed from rear of truck)
Cable Spooling
O=Over Drum
U=Under Drum
(viewed from rear of truck)
Motor Mount
D=Direct Mount
X=No Motor
Motor Type
CL-CharLynn
M10 S L R F O D CL
G=Speed Reducer
T=Triple
Gearbox Location
L=Left
R=Right
(viewed from rear of truck)

6
MAINTENANCE
MAINTENANCEMAINTENANCE
MAINTENANCE
Tulsa Winch worm gear winches require regular maintenance to ensure safe and
reliable operation. Regular oil changes with the correct oil for the ambient temperature
conditions and an annual inspection of the wear components are strongly
recommended.
Maintenance Scheduling
The owner is to ensure proper inspection intervals, in compliance with the API RP
2D Section 4, ANSI B30.5; 5-2.3 or ANSI B30.7; 7-2.1, and will review winch usage
categories on a periodic basis. A qualified inspector should perform all maintenance
and inspections.
Oil Maintenance
The oil in the gear and brake section should be changed every 1000 hrs or 6 months of
normal usage.
•Tulsa Winch recommends that the oil level in the gearbox be checked and
adjusted as part of the pre-use inspection. If the oil level drops frequently or oil
leakage is detected during an inspection, maintenance should be performed to
correct any problems.
GEARBOX OIL CAPACITY = 1.50 QTS.
•Gearbox oil level inspection is achieved by removing the oil level inspection plug
and visually inspecting the oil level. Minimum oil level is to the bottom of the
threads of the inspection hole. Refer to the chart below for the recommended oil
type and grade for your application.
All oils must meet MIL-PRF2105E standards. Substitution from a reputable manufacturer is allowed as long as type
and grade are maintained.
USE
(HRS PER
MONTH)
API RP 2D RECOMMENDED
INSPECTION SCHEDULE
0-10 PRE-USE, ANNUAL
11-50 PRE-USE, QUARTERLY
51+ PRE-USE, MONTHLY
MOBIL SHC 626
MOBILUBE HD80W140
SAE 140W AGMA 7 EP

7
OIL LEVELS
OIL LEVELSOIL LEVELS
OIL LEVELS
BRAKE
OIL DRAIN
BRAKE
OIL LEVEL
BRAKE
FILL/VENT
GEARBOX
OIL LEVEL
GEARBOX
FILL/VENT
GEARBOX
OIL DRAIN

8
BRAKE ADJUSTMENT
BRAKE ADJUSTMENTBRAKE ADJUSTMENT
BRAKE ADJUSTMENT
In general, worm brakes on Tulsa winches should be set to hold the load you are
currently working with. Excessive brake torque will result in excessive heat generation
and brake wear. The best way to insure proper brake adjustment is to pull the cable
tight against the load and stop to ensure the brake holds. If it doesn’t, tighten the brake
slightly and try it again. If the brake doesn’t respond to adjustment the brake must be
serviced.
If the input to the winch is accessible and a torque wrench can be adapted to it, the
brake can be set with a torque wrench. The Model 10 brake is shipped from the factory
pre-set at 32 Ft.-Lbs.
ADJUSTABLE SHOE BRAKE
To tighten the brake, loosen the two capscrews in the slotted holes and rotate the brake
in the direction shown. If the brake needs to be reversed, remove those same two
capscrews, rotate the cam 60 degrees and reinstall the capscrews in the other set of
holes which have just been revealed. After adjustment, be sure to re-tighten the cam
capscrews securely.
ADJUSTABLE MULTIPLE DISC OIL BRAKE
RN15W
This style of brake can be adjusted by turning the hex adjuster counter-clockwise to
increase brake and clockwise to decrease brake. The direction of braking for all multiple
disc brakes can be changed by removing the cam clutch, turning it over, and re-
installing it. For detailed service instructions, contact your Tulsa Winch distributor or the
factory.
If the input to the winch is accessible and a torque wrench can be adapted to it, the
brake can be set with a torque wrench. The RN15W brake is shipped from the factory
pre-set at 32 Ft.-Lbs.

9
DISASSEMBLY
DISASSEMBLYDISASSEMBLY
DISASSEMBLY
RUFNEK 15
RUFNEK 15 RUFNEK 15
RUFNEK 15 BRAKE DISASSEMBLY
BRAKE DISASSEMBLYBRAKE DISASSEMBLY
BRAKE DISASSEMBLY
1. Remove bottom drain plug (81) to
drain oil from brake.
2. Loosen the spring tension inside
the brake by rotating the adjusting
nut (71) clockwise until it stops.
Extreme care should be taken
when re
moving the brake cover.
The cover is spring loaded
against the cover screws.
3. Evenly remove the capscrews (75)
from the brake cover (77).
4. Remove the spring (73). Remove
the brake driver (78) along with the
brake components (63, 64, 65, 69,
74).
5. Inspect parts as follows, replace if
necessary:
A. Inspect the friction discs (64) for
uneven or excessive wear.
Friction discs should measure no
less than .055-in thick.
B. Inspect the stator plates (63) for
warpage or excessive wear.
C. Inspect the spring (73) for
damage or discoloration.
D. Cam clutch (65) should be free of
debris and have all cams intact.
If replacing the cam clutch (65),
take note of the direction it
locks up for reassembly.
E. Check coupler (66) for signs of
pitting, spalling, or excessive
wear.

10
MODEL 10
MODEL 10 MODEL 10
MODEL 10 BRAKE DISASSEMBLY
BRAKE DISASSEMBLYBRAKE DISASSEMBLY
BRAKE DISASSEMBLY
1. Loosen the capscrews (1).
2. Remove the capscrews (16) from the
cover (5).
3. Remove the cover (5) from the brake
housing (10).
4. Remove the brake shoes (6).
5. Remove the nut (7) and washer (8).
6. Use the two threaded holes in the
brake drum (17) and a gear puller to
remove the brake drum.
7. Inspect parts as follows, replace if
necessary:
A. Inspect the brake shoes (6) for
wear. If the shoe linings are worn
flush with the rivet heads, they
must be replaced.
B. Inspect the brake drum (17) for
severe wear or scoring.
C. Check the inside lower part of the
brake housing (10) for the
presence of oil. Replace the seal
(19) if oil is present.
If replacing the seal (19), first
drain the oil from the gearbox
then remove the capscrews
(18) and brake housing (10).

11
CLUTCH AND DRUM DISASSEMBLY
CLUTCH AND DRUM DISASSEMBLYCLUTCH AND DRUM DISASSEMBLY
CLUTCH AND DRUM DISASSEMBLY
1. Remove the capscrews (34), nuts
(31), and washers (32) attaching the
end bracket (55) to the frames (29 &
30).
2. Remove the end bracket (55), clutch
throwout assembly (56), and sliding
clutch (53).
3. Remove the keys (38) and thrust
washer (52) from the output shaft
(37).
4. Slide the drum (49) off of the output
shaft (37), making sure to keep the
weight of the drum supported.
5. Inspect parts as follows, replace if
necessary:
A. Inspect the bushing (54) in the
end bracket (55) for excessive
wear.
B. Inspect the keys (38), sliding
clutch (53), and thrust washer
(52) for damage. See page 17
for clutch inspection.
C. Inspect the bores of the drum
(49) for any wear or damage.
GEAR
GEARGEAR
GEARBOX
BOX BOX
BOX D
DD
DIS
ISIS
ISA
AA
ASSEMBLY
SSEMBLYSSEMBLY
SSEMBLY
1. Supporting the end of the output
shaft (37) with a hoist, remove the
cover (26) by removing capscrews
(24 and 25), nuts (12), and washers
(13).
2. Use the hoist to lift the output shaft
(37), bushings (21), keys (36), roll
pin (41), and gear (assembled items
12, 13, 28, 35, and 40) out of the
housing (39).
3. Remove the bushings (21) from the
output shaft (37). Remove the gear
(28) from the carrier (40) by
removing the twelve capscrews (35),
nuts (12), and washers (13).
4. Remove the carrier (40) by removing
the roll pin (41) then remove the keys
(36).
5. Remove the worm (44) from the
housing (39) by removing either the
motor (57) and motor adapter (60),
or the end cap (45), depending on
the type of drive. From the brake
end, push the worm (44) out of the
housing (39). If the brake has not
been removed, see the brake
disassembly on page eight or nine.
6. Inspect parts as follows, replace if
necessary:
A. Inspect the carrier (40) for
damage.
B. Inspect the gear (28) for
excessive wear or damage. See
Pg.12 this manual for detailed
instructions.
C. Inspect the keys (36) for damage.
D. Inspect the bushings (21) for
excessive wear.
E. Inspect the worm (44) for
excessive wear or signs of heat
checking or cracks.
F. Inspect the bearings (20) and
seals (19) for excessive wear or
damage.

12
GEAR INSPECTION INSTRUCTIONS
GEAR INSPECTION INSTRUCTIONSGEAR INSPECTION INSTRUCTIONS
GEAR INSPECTION INSTRUCTIONS
Check gear wear by removing the cover and visually inspecting the bronze gear. If the
gear is worn such that there is no visible land on the throat of the gear between the gear
flanks as shown in picture above the gear should be replaced.
LAND

13
ASSEMBLY
ASSEMBLYASSEMBLY
ASSEMBLY
GEAR
GEARGEAR
GEARBOX
BOXBOX
BOX ASSEMBLY
ASSEMBLY ASSEMBLY
ASSEMBLY
1. Press the bearings (20) onto the
worm (44) then install the worm and
bearings into the housing (39).
2. For winches driven by a hydraulic
motor:
Press a new oil seal (19) into the
motor adapter (60). Attach the motor
adapter (60) to the housing (39) with
six capscrews (80), using gasket
(11). Install the motor (57) with two
capscrews (58) and washers (61).
For winches driven by a PTO
sprocket and chain:
Press a new oil seal (19) into the end
cap (45). Attach the end cap (45) to
the housing (39) with six capscrews
(18) using gasket (11).
3. Install the keys (36) into the output
shaft (37).
4. Bolt the gear (28) to the carrier (40)
using twelve capscrews (35), nuts
(12), and washers (13).
5. Install the assembled gear onto the
shaft (37). Press the roll pin (41) into
the carrier (40). Slide the bushings
(21) on to both ends of the output
shaft (37).
6. Install the output shaft ass’y into the
housing (39).
7. Attach the cover (26) to the housing
(39), using capscrews (24 and 25),
nuts (12), washers (13), using
gaskets (27).
8. Fill the gearbox and brake with the
proper oil. Refer to the maintenance
section of this manual for oil type and
amount.

14
MODEL 10
MODEL 10 MODEL 10
MODEL 10 BRAKE ASSEMBLY
BRAKE ASSEMBLYBRAKE ASSEMBLY
BRAKE ASSEMBLY
1. Press the oil seal (19) into the brake
housing (10). Attach the brake
housing (10) to the gearbox with six
capscrews (18) using gasket (11).
2. Install the brake drum (17) and key
(9) onto the worm shaft (44). Secure
the brake drum with the nut (7) using
lock washer (8). Bend two tabs of
the washer (8) over the flats of the
nut (7).
3. If removed, reattach the cam (15) to
the brake cover (5) in the orientation
needed for your application using
two capscrews (1) and washers (2).
4. Install the brake cover (5), cam (15),
and brake shoes (6) into the brake
housing (10).
5. Secure the brake cover (5) using four
capscrews (16).
6. Adjust the brake using the procedure
on page 8 of this manual.
RUFNEK 15 BRAKE ASSEMBLY
RUFNEK 15 BRAKE ASSEMBLYRUFNEK 15 BRAKE ASSEMBLY
RUFNEK 15 BRAKE ASSEMBLY
1. Press the oil seal (19) into the brake
housing (62). Attach the brake
housing to the gearbox (39) with six
capscrews (68) using gasket (11).
2. Install the key (67), and coupler (66)
onto worm (44). Next install
clutch/driver assembly (65, 69, 74,
78), onto the coupler (66).
3. With the retaining ring (69) on the
driver (78). Install the stator plates
(63) and friction discs (64), starting
with a stator plate and alternating
between stator plates and friction
discs until four friction discs and five
stator plates are used.
4. Install the spring (73), adjusting nut
assembly (assembled items 70, 71,
and 72), and brake cover (77).
5. Attach the brake cover (77) evenly
installing eight capscrews (75).
6. Install the drain plug (81) into the
bottom of the brake cover (77).
7. Fill gearbox and brake with proper
oil. Refer to winch maintenance
section of this manual for oil type and
amounts.
8. Adjust the brake using the procedure
on page 8 of this manual.
CLUTCH AND DRUM ASSEMBLY
CLUTCH AND DRUM ASSEMBLYCLUTCH AND DRUM ASSEMBLY
CLUTCH AND DRUM ASSEMBLY
1. Grease the inside of the drum (49)
bore and the output shaft (37).
Install the drum (49) onto the output
shaft (37).
2. Install the thrust washer (52). Tap
the keys (38) into the shaft (37).
3. Install the sliding clutch (53) and end
bracket (55) onto the output shaft
(37), lining up the yoke with the
grooves in the sliding clutch (53).
Attach the end bracket to the frame
using four capscrews (34), washers
(32), and nuts (31).

15
TROUBLESHOOTING
TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTING
FAILURE PROBABLE CAUSE
Clutch handle won’t latch a) Clutch jaws aren’t aligned. Align the
jaws by rotating drum.
b) Damaged yoke or linkage. Replace the
yoke or clutch
Oil leaks from housing a) Seal damaged or worn. Replace the
seal(s).
b) Too much gearbox oil. Drain excess
oil.
Load drifts down a) Oil-cooled brake out of adjustment or
worn. Adjust brake until load doesn’t
drift. Replace the parts as required.
Winch runs too slow a) Low flow rate. Check the flow rate and
increase if necessary.
b) Hydraulic motor worn out. Replace the
motor.
Cable drum won’t free spool a) Winch not mounted squarely. Check
mounting and confirm that the winch is
mounted on a level surface.
b) Clutch not disengaged. Disengage the
clutch.
Cable birdnests when clutch is
disengaged.
a) Drag brakes are worn. Replace the
drag brakes.
Hydraulic fluid leaks from the gearbox a) Damaged motor shaft seal. Replace
the seal.
Winch won’t pick up heavy loads. a) Too much cable on the drum. Use the
snatch block or remove some cable
from the drum.
b) System pressure too low. Increase the
hydraulic system pressure.
c) Winch not broke-in. Run winch at half
of rated load for several pulls.

16
BILL OF MATERIAL
BILL OF MATERIALBILL OF MATERIAL
BILL OF MATERIAL
BOM DATED SEPTEMBER 2005
SEQ QTY P/N DESCRIPTION
1 2 20522 CAPSCREW
2 2 20617 WASHER
3 -- -- OMIT
4 -- -- OMIT
5 1 3568 BRAKE COVER
6 2 1733 BRAKE SHOE
7 1 20144 NUT
8 1 20115 LOCKWASHER
9 1 20279 KEY
10 1 23872 BRAKE HOUSING
11 1 20731 GASKET
12 22 20271 NUT
13 22 20526 LOCKWASHER
14 2 20517 PIN
15 1 23875 CAM
16 6 939261 CAPSCREW
17 1 29503 BRAKE DRUM
18 4 28578 CAPSCREW
19 1 20232 SEAL
20 2 20732 BALL BEARING
21 2 20710 BUSHING
22 1 12079 BUSHING
23 3 21128 GREASE ZERK
24 2 20270 CAPSCREW
25 4 33469 CAPSCREW
26a 1 44026 COVER (RUFNEK 15)
26b 1 40970 COVER (MODEL 10)
27 2 20730 GASKET
28 1 20812 GEAR
29 1 20726 FRAME
30 1 20725 FRAME
31 8 20267 NUT
32 8 20518 LOCKWASHER
33 3 20286 PLUG
34 8 20310 CAPSCREW
35 16 20325 CAPSCREW
36 2 21526 KEY
37 1 22412 SHAFT
38 2 25762 KEY
39 1 20704 HOUSING
40 1 22411 CARRIER
41 1 21527 ROLL PIN
42 1 13050 BREATHER

17
BILL OF MATERIAL
BILL OF MATERIAL BILL OF MATERIAL
BILL OF MATERIAL CONTINUED
CONTINUEDCONTINUED
CONTINUED
SEQ QTY P/N DESCRIPTION
43 1 20105 KEY
44a 1 43971 WORM (RUFNEK 15 MECHANICAL)
44b 1 44057 WORM (RUFNEK 15 HYDRAULIC)
44c 1 40964 WORM (MODEL 10 HYDRAULIC)
44d 1 20808 WORM (MODEL 10 MECHANICAL RIGHT HAND))
44e 1 20809 WORM (MODEL 10 MECHANICAL LEFT HAND)
45 1 20815 END CAP
46 1 20092 WASHER
47 1 20278 CAPSCREW
48 1 21129 U BOLT
49 1 20708 DRUM
50 -- -- OMIT
51 -- -- OMIT
52 1 20728 THRUST WASHER
53 1 20712 CLUTCH
54 1 939266 BUSHING
55 1 20716 END BRACKET
56 1 1125 CLUTCH THROWOUT
57a 1 43632 MOTOR (RUFNEK 15)
57b 1 40272 MOTOR (MODEL 10)
58 2 13529 CAPSCREW
59 1 40147 GASKET
60 1 40960 MOTOR ADAPTER
61 2 41000 LOCKWASHER
62 1 43956 BRAKE HOUSING
63 5 44141 STATOR PLATE
64 4 33564 FRICTION DISC
65 1 33565 CAM CLUTCH
66 1 44142 COUPLER
67 1 25519 KEY
68 6 44144 CAPSCREW
69 1 44145 RETAINING RING
70 1 43960 SPRING PLATE
71 1 41406 ADJUSTING NUT
72 1 41411 O-RING
73 1 33559 SPRING
74 1 29084 RETAINING RING
75 8 20522 CAPSCREW
76 1 17344 O-RING
77 1 43958 COVER
78 1 44143 BRAKE DRIVER
79 1 12208 BUSHING
80 12 24475 CAPSCREW
81 2 21684 PLUG

18
TORQUE SPECIFICATION
TORQUE SPECIFICATIONTORQUE SPECIFICATION
TORQUE SPECIFICATIONS C
S CS C
S CHART
HARTHART
HART
Dry Plated Lubricated Dry Plated Lubricated
SAE
Grade 5
SAE
Grade 5
SAE
Grade 5
SAE
Grade 8
SAE
Grade 8
SAE
Grade 8
Nominal Size Torque
*(Ft-Lbs)
Torque
*(Ft-Lbs)
Torque
*(Ft-Lbs)
Torque
*(Ft-Lbs)
Torque
*(Ft-Lbs)
Torque
*(Ft-Lbs)
1/4 20 8 6 5 12 9 7
1/4 28 10 7 6 14 10 8
5/16 18 17 13 10 25 18 15
5/16 24 19 14 11 27 20 16
3/8 16 31 23 19 44 33 26
3/8 24 35 26 21 49 37 30
7/16 14 49 37 30 70 53 42
7/16 20 55 41 33 78 58 47
1/2 13 76 57 45 106 80 64
1/2 20 85 64 51 120 90 72
9/16 12 109 82 65 153 115 92
9/16 18 122 91 73 172 129 103
5/8 11 150 113 90 212 159 127
5/8 18 170 128 102 240 180 144
3/4 10 266 200 160 376 282 226
3/4 16 297 223 178 420 315 252
7/8 9 430 322 258 606 454 364
7/8 14 474 355 284 668 501 401
1 8 644 483 386 909 682 545
1
14 721 541 433 1019 764 611
1-1/8 7 794 596 475 1288 966 772
1-1/8 12 890 668 534 1444 1083 866
1-1/4 7 1120 840 672 1817 1363 1090
1
-
1/4
12
1241
930
745
2012
1509
1207
T = BOLT TORQUE (LB. FT.) T = (KWD) / 12
K = TORQUE COEFFICIENT (K = 0.20 DRY K = 0.15 PLATED K = 0.12 LUBRICATED)
W = PRELOAD TENSION
D = NOMINAL BOLT SIZE (IN.) * ALL TORQUE VALUE TOLERANCES ARE ± 5

19
CLUTCH INSPECTION
CLUTCH INSPECTIONCLUTCH INSPECTION
CLUTCH INSPECTION

20
ISOMETRIC DR
ISOMETRIC DRISOMETRIC DR
ISOMETRIC DRAWING
AWINGAWING
AWING
FOR RUFNEK BRAKE AND
HYDRAULIC MOTOR
ASSEMBLIES, SEE PAGE 18