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Tulsa RUFNEK 20 Service Manual

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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 20 BRAKE DISASSEMBLY......................................................................................................................................9
MODEL 23 BRAKE DISASSEMBLY........................................................................................................................................10
CLUTCH AND DRUM DISASSEMBLY....................................................................................................................................11
GEARBOX DISASSEMBLY.....................................................................................................................................................12
GEAR INSPECTION INSTRUCTIONS ....................................................................................................................................13
ASSEMBLY ................................................................................................................................................ 14
GEARBOX ASSEMBLY ..........................................................................................................................................................14
MODEL 23 BRAKE ASSEMBLY..............................................................................................................................................15
RUFNEK 20 BRAKE ASSEMBLY............................................................................................................................................15
CLUTCH AND DRUM ASSEMBLY..........................................................................................................................................16
TROUBLESHOOTING................................................................................................................................ 16
BILL OF MATERIAL................................................................................................................................... 16
TORQUE SPECIFICATIONS CHART ........................................................................................................ 16
CLUTCH INSPECTION .............................................................................................................................. 16
ISOMETRIC DRAWING.............................................................................................................................. 16
RUFNEK BRAKE, HYDRAULIC MOTOR, & CLUTCH POSITION INDICATOR...................................... 16
SEL-0045-001.DOC
REV-0 July 2020
RUFNEK 20
AND
MODEL 23
DESIGN SERIES 001

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Summary of Contents for Tulsa RUFNEK 20

  • Page 1: Table Of Contents

    WINCH BREAK-IN ..................................4 MODEL CODES ............................5 MAINTENANCE............................6 OIL LEVELS....................................7 BRAKE ADJUSTMENT ................................8 DISASSEMBLY ............................9 RUFNEK 20 BRAKE DISASSEMBLY............................9 MODEL 23 BRAKE DISASSEMBLY............................10 CLUTCH AND DRUM DISASSEMBLY............................11 GEARBOX DISASSEMBLY..............................12 GEAR INSPECTION INSTRUCTIONS ............................13 ASSEMBLY ..............................14 GEARBOX ASSEMBLY ................................14 MODEL 23 BRAKE ASSEMBLY..............................15...
  • Page 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.
  • Page 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.

  • Page 4: General Information

    INTRODUCTION 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.

  • Page 5: Model Codes

    MODEL CODES MODEL CODES MODEL CODES MODEL CODES RN20 W M R F O M X THE RUFNEK 20 SERIES WINCHES ARE ONLY AVAILABLE WITH LEFT HAND GEARS. Motor Type Gear Type 1. Single Speed Gear Motor W=Worm 2. Two Speed Gear Motor P=Planetary 3.

  • Page 6: 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.

  • Page 7: Oil Levels

    OIL LEVELS OIL LEVELS OIL LEVELS OIL LEVELS GEARBOX FILL/VENT GEARBOX OIL LEVEL GEARBOX OIL DRAIN BRAKE FILL/VENT BRAKE OIL DRAIN BRAKE OIL LEVEL...

  • Page 8: Brake Adjustment

    BRAKE 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.

  • Page 9: Disassembly

    DISASSEMBLY DISASSEMBLY DISASSEMBLY DISASSEMBLY RUFNEK RUFNEK RUFNEK RUFNEK 20 20 BRAKE DISASSEMBLY BRAKE DISASSEMBLY BRAKE DISASSEMBLY BRAKE DISASSEMBLY 1. Remove the bottom drain plug (24) 5. Inspect parts as follows, replace if to drain oil from brake. necessary: 2. Loosen the spring tension inside A.
  • Page 10 MODEL MODEL 23 MODEL MODEL 23 BRAKE DISASSEMBLY BRAKE DISASSEMBLY BRAKE DISASSEMBLY BRAKE DISASSEMBLY 1. Loosen the capscrews (14). 7. Inspect parts as follows, replace if necessary: 2. Remove the capscrews (16) from the cover (4). A. Inspect the brake shoes (5) for wear.

  • Page 11: Clutch And Drum Disassembly

    CLUTCH AND DRUM DISASSEMBLY CLUTCH AND DRUM DISASSEMBLY CLUTCH AND DRUM DISASSEMBLY CLUTCH AND DRUM DISASSEMBLY 1. Remove the rod (73) by removing control arm (60). Finally, remove the the cotter keys (72). capscrews (66), washers (27), and nut (28) attaching the brake band to 2.
  • Page 12 GEAR GEAR GEAR GEARBOX BOX DISASSEMBLY DISASSEMBLY DISASSEMBLY DISASSEMBLY 1. Supporting the end of the output end, push the worm (37) out of the shaft (49) with a hoist, remove the housing (36). If the brake has not cover (33) by removing capscrews been removed, brake...

  • Page 13: Gear Inspection Instructions

    GEAR INSPECTION INSTRUCTIONS GEAR INSPECTION INSTRUCTIONS GEAR INSPECTION INSTRUCTIONS GEAR INSPECTION INSTRUCTIONS LAND 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.

  • Page 14: Assembly

    ASSEMBLY ASSEMBLY ASSEMBLY ASSEMBLY GEARBOX GEAR BOX ASSEMBLY ASSEMBLY GEAR GEAR ASSEMBLY ASSEMBLY 1. Press the bearings (11) onto the 5. Install the assembled gear onto the worm (37) then install the worm and shaft (49). Press the roll pin (46) into bearings into the housing (36).
  • Page 15 (14) and washers 6. Adjust the brake using the procedure (15). on page 8 of this manual. RUFNEK RUFNEK RUFNEK RUFNEK 20 20 BRAKE BRAKE BRAKE BRAKE ASSEMBLY ASSEMBLY ASSEMBLY ASSEMBLY 1. Press the oil seal (108) into the 3.

  • Page 16: Clutch And Drum Assembly

    CLUTCH AND DRUM ASSEMBLY CLUTCH AND DRUM ASSEMBLY CLUTCH AND DRUM ASSEMBLY CLUTCH AND DRUM ASSEMBLY 1. Install the bushings (48) into drum 3. Install the sliding clutch (55) and end (52) and clutch (53). Install the drum bracket assembly onto the output (52) onto the output shaft (49).

  • Page 17: Troubleshooting

    TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING 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).

  • Page 18: Bill Of Material

    BILL OF MATERIAL BILL OF MATERIAL BILL OF MATERIAL BILL OF MATERIAL BOM DATED SEPTEMBER 2005 DESCRIPTION 23875 OMIT OMIT 3568 CAM PLATE 1733 BRAKE SHOE 20114 20115 WASHER 29503 BRAKE DRUM 20279 20232 OIL SEAL 20302 BEARING 20267 20518 WASHER 20522 CAPSCREW...
  • Page 19 BILL OF MATERIAL BILL OF MATERIAL BILL OF MATERIAL BILL OF MATERIAL CONTINUED CONTINUED CONTINUED CONTINUED DESCRIPTION 40591 LEFT HAND HYDRAULIC WORM (M23) 44060 MECHANICAL WORM (RUFNEK) 44062 HYDRAULIC WORM (RUFNEK) 20105 20080 END CAP 20092 WASHER 20278 CAPSCREW 26799 BREATHER 22437 CARRIER...
  • Page 20 BILL OF MATERIAL BILL OF MATERIAL CONTINUED CONTINUED CONTINUED CONTINUED DESCRIPTION 20110 COLLAR 20116 24724 SNAP RING 1739 BRAKE BAND 40342 MOTOR (RUFNEK 20) 13529 CAPSCREW 25654 CAPSCREW 40147 GASKET 40595 MOTOR ADAPTER 41000 WASHER 41272 OIL SEAL 43962 BRAKE HOUSING...
  • Page 21 TORQUE SPECIFICATION TORQUE SPECIFICATIONS CHART S CHART TORQUE SPECIFICATION TORQUE SPECIFICATION S CHART S CHART Plated Lubricated Plated Lubricated Grade 5 Grade 5 Grade 5 Grade 8 Grade 8 Grade 8 Torque Torque Torque Torque Torque Torque Nominal Size *(Ft- *(Ft- *(Ft- *(Ft-Lbs)

  • Page 22: Clutch Inspection

    CLUTCH CLUTCH INSPECTION INSPECTION CLUTCH CLUTCH INSPECTION INSPECTION...

  • Page 23: Isometric Drawing

    ISOMETRIC DRAWING ISOMETRIC DRAWING ISOMETRIC DRAWING ISOMETRIC DRAWING FOR RUFNEK BRAKE, HYDRAULIC MOTOR, AND YOKE WITH CLUTCH POSITION INDICATOR, SEE PAGE 24...

  • Page 24: Rufnek Brake, Hydraulic Motor, & Clutch Position Indicator

    R R R R UFNEK BRAKE, HYDRAULIC MOTOR, & CLUTCH POSITION INDICATOR UFNEK BRAKE, HYDRAULIC MOTOR, & CLUTCH POSITION INDICATOR UFNEK BRAKE, HYDRAULIC MOTOR, & CLUTCH POSITION INDICATOR UFNEK BRAKE, HYDRAULIC MOTOR, & CLUTCH POSITION INDICATOR CLUTCH POSITION INDICATOR KIT HYDRAULIC MOTOR VIEW RUFNEK...

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Rufnek 23

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