Service Manual

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HYDRAULIC LIFT VALVE/CYLINDER MANUAL - WHEEL HORSE

Table of Contents – Page 1 of 1

FOREWORD

CONTROL VALVE SERVICE

GENERAL INFORMATION

MANUFACTURING DATE CODE (OMCO)

VALVE DESCRIPTION (OMCO)

OVERHAUL KIT CONTENTS (OMCO)

OVERHAUL PROCEDURE (OMCO) SERVICE NOTES

DISASSEMBLY & REASSEMBLY

VALVE DESCRIPTION (VICTOR)

OVERHAUL KIT CONTENTS (VICTOR) VICTOR 110068 & 111066 CONTROL

VICTOR 110492 CONTROL VALVE

OVERHAUL PROCEDURE (VICTOR) SERVICE NOTES

DISASSEMBLY & REASSEMBLY (SINGLE SPOOL VICTOR)

DISASSEMBLY (TWO SPOOL VICTOR)

ASSEMBLY (TWO SPOOL VICTOR)

LIFT CYLINDER SERVICE

GENERAL INFORMATION

CYLINDER DESCRIPTION

O-RING & GASKET KIT CONTENTS

OVERHAUL PROCEDURE SERVICE NOTES

DISASSEMBLY & REASSEMBLY

Summary of content (12 pages)

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HYDRAULIC LIFT VALVE/CYLINDER MANUAL - WHEEL HORSE Table of Contents – Page 1 of 1 FOREWORD CONTROL VALVE SERVICE GENERAL INFORMATION MANUFACTURING DATE CODE (OMCO) VALVE DESCRIPTION (OMCO) OVERHAUL KIT CONTENTS (OMCO) OVERHAUL PROCEDURE (OMCO) SERVICE NOTES DISASSEMBLY & REASSEMBLY VALVE DESCRIPTION (VICTOR) OVERHAUL KIT CONTENTS (VICTOR) VICTOR 110068 & 111066 CONTROL VICTOR 110492 CONTROL VALVE OVERHAUL PROCEDURE (VICTOR) SERVICE NOTES DISASSEMBLY & REASSEMBLY (SINGLE SPOOL VICTOR) DISASSEMBLY (TWO SPOOL
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HYDRAULIC LIFT VALVE & CYLINDER REPAIR MANUAL Printed in U.S.A. 0984 PART NO.
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FOREWORD This service and repair manual hasbeencompiled to provide authorized Wheel Horse service personnel with proper procedures and techniques for servicinghydraulic lift controlvalves and cylinders used on Wheel Horse equipment. Following Table of Contentslists all areas covered. It is adviseable to read all sections first to become familiar with repair procedures. Since valves and cylinders are hydraulic components, strict cleanlinessmustbe maintained during all stagesofservice and repair.
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- GENERAL INFORMATION This manual covers the overhaul of the hydraulic lift control valves listed below. 102874 & 106681 (OMCO) Fig. 1 1973 18 HP Automatic, 1974-80 D-Series Automatic tractors with Sundstrand hydrostatic transmission. lift systempressure is regulated by an implement relief valve located in the hydrostatic transmission. 103204 & 106680 (OMCO) Fig. 1 1973 16 HP and 1974-80 C-Series Automatic tractors with Sundstrand hydrostatic transmission.
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OVERHAUL KIT CONTENTS (OMCO) 2. Remove the parts shown in Fig. 5A or 5B, as applicable. The 105178 Overhaul Kit for OMCO control valves contains the parts listed below. Two kits are required service 102874, 106681 & 109679 two-spool control ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 QTY.
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IO SPRING TENSION ADJUSTER (IMPLEMENT CIRCUIT PRESSURE) FIG. 7. FIG. 10. Implement Relief Valve Removed (108494/ 109679 Va Ives) Double Valve Disassembled 7 . Reassemble the valve in reverseorder, using the new parts supplied in the overhaul kit. The following assemblynotes apply: 5 . Remove the bolts securingthe valve together. Separatethe sectionsone at a time, carefully noting the location and quantity of mylar shims around the bolt holes (if used). a.
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1100 8 & 11 VALVE 10492 VALVE i RELIEF FIG.11.
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move cotter pin, clevis pin and handle from spool. Remove “O” Rings from valve body. 5 . The relief valve should be removed for cleaning. Remove thecap nut; discard thegasket (Fig. 15). 6. Using a centerpunch, lightlymark the adjustment set screw and valve body so the set screw canbe returned to i t s exactposition. Do not tamper with reliefvalve setting;severetransmission damagemay result if it is incorrectly set. 3. Remove two detent plugs,springs and balls from detent end cap(Fig. 17).
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Ring until end of spool i s flush with end of valve. Position handleinto slot of spool andalignbottom hole of handleand hole in spool. Install clevis pin into handle and spool and secure using cotter pin. Installlinkinto holes of handle and valve body and secure using cotter pin. FIG. 19. Load Check Valves Assembly (TWO SPOOL VICTOR) 1. Coat two load check poppets and "0" Rings with lithium basegrease (Fig.19). Install plugs, "0" Rings,check poppets and springs into top bores of valve. center 2.
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THREADED CLEVIS ROUND-WIRE FIG. 21. \ RETAINING CLEVISSHAPE VARIES RING FIG. 22A. Remove Clevis & Snap Ring Hydraulic Lift Cylinders . WORK POINTED TOOL UNDER RETAINING RING TO EASE REMOVAL O-RING & GASKET KIT CONTENTS The 101699 O-ringand Gasket K i t containsthe following items, and is used on cylinders A & B (Fig.21): ITEM QTY. 1 2 2 1 1 3 4 5 2 6 1 1 DESCRIPTION RETAINING RIN O-ring Piston and Guide Bushing O.D. O-ring, Guide Bushing I.D.
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USE TAPE ON THREADS WHEN INSTALLING O-RING AND CLEVIS \ FIG. 24. PISTON ROD Piston, Rod & Bushing Seals S 1/4 in. DEEP) - Y STAKED TO ROD TO REMOVE, USE STRAP WRENCH OR DRILL TWO HOLES IN END, AS SHOWN, FOR PINS OR SPANNERWRENCH. RE-STAKE AFTER ASSEMBLY. FIG. 25. PistonRemoval USE TAPE ON THREADS WHENINSTALLINGO-RING ROD GUIDEBUSHING I O-RING & BACK-UP WASHER(WIPERSIDE) FIG. 26. 6. Piston, Rod & Bushing Seals install the new O-rings, gaskets and sealscontained in the service kit.
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Product Information and specifications are shown herein as of the time printing of Wheel Horse Products.