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Allied Systems H12A Operation, Parts & Maintenance Manual

Hydraulic towing winch
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Please check the Allied Systems website
regularly for updates to this manual.
www.alliedsystems.com
CUSTOMER
EDITION
P/N 599016W
Printed in USA
09/27/2011

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Summary of Contents for Allied Systems H12A

  • Page 1 Please check the Allied Systems website regularly for updates to this manual. www.alliedsystems.com CUSTOMER EDITION P/N 599016W Printed in USA 09/27/2011...
  • Page 2 Safety Precautions Read, understand and observe the precautions on the following pages to prevent injury to personnel and damage to equipment. Winch serial number _________________________ Date put into service _________________________...

  • Page 3: Safety Summary

    Safety Summary Safety Summary General Safety Notices Safety Regulations The following pages contain general safety warnings Each country has its own safety legislation. It is in the which supplement specifi c warnings and cautions appear- operator’s own interest to be conversant with these regu- ing elsewhere in this manual.
  • Page 4 • Do not use the control levers for hand holds when • Do not use winch as a hoist. Tractor and skidder entering or leaving the vehicle. mounted winches are designed for towing. • Do not permit other people near the control area when you inspect or repair a machine.
  • Page 5 Safety Summary • Make sure that any hand signals used by ground • The hydraulic system must be kept clean and free personnel are clearly defi ned and understood by of contamination at all times. everyone involved. • Be aware of the hazards of pressurized hydrau- •...
  • Page 6 When ordering replacement parts, give the unit serial number, part number, name of part and quantity required. For any further information on parts, service or ordering, consult your local winch dealer, or contact Allied Systems Company: Allied Systems Company 21433 SW Oregon Street...

  • Page 7: Table Of Contents

    Contents Contents Safety Summary ............i Section 6: Service and General Maintenance ..6-1 Bleeding Brake System ...........6-1 Section 1: General Introduction ......1-1 Gear Lubrication Schedule ........6-1 Unit Identifi cation .............1-1 Maintenance Schedule ..........6-1 Winch Components ..........1-2 Winch Wire Rope Capacity ........1-2 Section 7: Disassembly and Assembly ....7-1 Winch General Arrangement ........1-3 General Procedure Before Starting ......7-1...
  • Page 8 Notes...

  • Page 9: Section 1: General Introduction

    Section 1 General Introduction Unit Identifi cation Allied Winch S/N Nameplate Data For Tractor Mountings H12A 1501 Winch Model Vehicle Code See Figure 1-1 Sequence Number Hydraulic Operation Type T = Uses Tractor Supplied Controls Gear Ratio Code Internal Option...

  • Page 10: Winch Components

    General To supplement the following descriptions, consult the 2. Clutch – Sprag (Cam) type one way Winch General Arrangement Drawings on pages 1-3 3. Brake – wet multi-disc type through 1-5. 4. Planetary gear reductions Winch Components 5. Drive Shaft 6.
  • Page 11 Section 1 Section 1 Figure 1-3 H12A General Arrangement - 1 1 - 3...
  • Page 12 General Figure 1-4 H12A General Arrangement - 2 1 - 4...
  • Page 13 Section 1 Figure 1-5 H12A General Arrangement - 3 1 - 5...
  • Page 14 General Notes Notes 1 - 6...

  • Page 15: Section 2: Winch Operation

    Section 2 Winch Operation The Allied H12A Winch is made up of these basic as- is pressurized during reverse (lowering) rotation, and be- semblies: comes the exhaust port during forward (hoisting) rotation. In this way the brake is held engaged at all times until the winch is powered in reverse (lowering).
  • Page 16 Winch Operation Notes 2 - 2...

  • Page 17: Section 3: Installation

    Section 3 Installation Winch Mounting Winch should be installed according to the installation print supplied with the winch. All hardware should be properly tightened. Do not operate or perform any lubrication, maintenance or repair on this product, until you have read and understood the operation, lubrication, maintenance and repair informa- tion.
  • Page 18 Installation Prior to Operation: • Drain gear cavity of rust inhibiting oil and fi ll with gear oil as per subsection of Gear Cavity Lubrication. • Replace metal plugs with appropriate fi ttings, includ- ing vent. BRAKE BLEED PORT VENT PORT SAE #8 O-RING BOSS SAE #4 O-RING BOSS LINE-IN PORT...
  • Page 19 Notes Section 3 3 - 3...
  • Page 20 Installation Notes 3 - 4...

  • Page 21: Section 4: Hydraulic Components

    fi lter the oil and create backpressure to cause circu- Hoses lation through the brake housing. The main oil supply for the H12A is supplied through the The vent port should be connected directly to the reservoir ripper lift circuit. These hoses connect directly to the winch as shown (below the oil level).
  • Page 22 Hydraulic Components Notes 4 - 2...
  • Page 23 Section 4 Figure 4-2 H12A Hydraulic & Electrical Schematic (For H12A Winch Prior to Serial Number 1004) 4 - 3...
  • Page 24 Hydraulic Components Figure 4-2 H12A Hydraulic & Electrical Schematic (For H12A Winch After Serial Number 1004) 4 - 4...

  • Page 25: Section 5: Start-Up Procedure

    Section 5 Start-Up Procedure DO NOT operate the winch until all conditions in previous • Check that the pressure at the vent port (refer to sections have been completed. DO NOT install wire rope Figure 3-2) is less than 10 psi (0.7 bar). on drum until this Start-Up procedure is complete.
  • Page 26 Start-Up Procedure Notes 5 - 2...

  • Page 27: Section 6: Service And General Maintenance

    Section 6 Service and General Maintenance Once per week the following tasks should be per- If oil analysis indicates a potential problem, it is recom- formed: mended that the winch be disassembled, inspected and reassembled as described in Section 7, DISASSEMBLY/ ASSEMBLY.
  • Page 28 Service and General Maintenance Notes 6 - 2...

  • Page 29: General Procedure Before Starting

    Section 7 Disassembly/Assembly General Procedure Before Starting Disassembly Of Brake Following removal of the Brake, proceed as follows: • A clean work area, with dust- and grit-free work bench, should be available. • Remove the Brake Piston from the housing. •...

  • Page 30: Assembly Of Brake

    Disassembly/Assembly • To remove the Brake Hub, Sprag Clutch Assembly • Reassemble by following the reverse procedure of and the two Sprag Bearings from the Sun Gear Disassembly and Removal. Shaft, the Retaining Ring must fi rst be removed. The Ball Bearing can now be removed if required. Disassembly Of Gear Reductions Following the removal of Gear Reductions proceed as SUN GEAR SHAFT...
  • Page 31 Notes Section 7 7 - 3...
  • Page 32 Disassembly/Assembly Notes 7 - 4...

  • Page 33: Section 8: Troubleshooting

    Section 8 Troubleshooting 8.1 Winch Will Not Pull Load Probable Cause Remedy 1. Tractor or winch relief valve may be set too low. Install a pressure gauge in the LINE-IN circuit (refer to Figure 8-1) and apply a stall pull on the winch. If pressure is low, increase relief valve setting until recommended pressure is obtained (refer to Figure 4-2).

  • Page 34: Considerable Reduction In Line Speed

    Troubleshooting 8.2 Considerable Reduction In Line Speed Probable Cause Remedy 1. Worn motor. Replace motor. 2. If this trouble occurs suddenly after working at Remove relief valve, disassemble and clean parts maximum pull, a particle of dirt may be lodged thoroughly in a suitable solvent.

  • Page 35: When Pulling A Load

    Section 8 8.4 Brake Will Not Hold In Neutral When Pulling a Load Probable Cause Remedy 1. There is excessive back pressure acting on the Install a pressure gauge in the LINE-OUT circuit (refer reverse port of the winch motor. This back pressure to Figure 8-1).

  • Page 36: Brake Vibrates When Lowering A Load

    Troubleshooting 8.6 Brake Vibrates When Lowering A Load Probable Cause Remedy 1. Hydraulic pump RPMs too slow. Operate hydraulic pump at maximum RPM. 2. Control valve handle being operated too quickly. Operate the valve smoothly when starting and stopping a load. 3.
  • Page 37 Section 8 Notes 8 - 5...
  • Page 38 Notes Troubleshooting 8 - 6...
  • Page 40 To fi nd a dealer in your area, Call: (503) 625-2560, Fax: (503) 625-7269 , or E-mail: marketing@alliedsystems.com, or Visit our website: http://www.alliedsystems.com 599016W 09/27/2011 Printed in USA...

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