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Groundsmaster 4000--D Raise Cutting Unit (LH Deck Shown) Working Pressure Low Pressure (Charge) Return or Suction Flow FRONT PTO MANIFOLD M1 RV1 P1 RV2 LC1 S M2 LC2 P2 LH PTO MANIFOLD M1 RV1 P1 RV2 LC1 S M2 LC2 P2 OR RH PTO MANIFOLD M1 RV1 P1 RV2 LC1 S M2 LC2 P2 OR M1 M2 ST L P1 T P2 FAN DRIVE MANIFOLD TRACTION MANIFOLD 4WD MANIFOLD COUNTERBALANCE MANIFOLD Hydraulic System Page 4 - 16 Groundsmaster 4000--D
Raise Cutting Deck A four section gear pump is coupled to the piston (traction) pump. The third gear pump section supplies hydraulic flow to the lift/lower control valve and the steering control valve. Hydraulic flow from this pump section is delivered to the two circuits through a proportional flow divider. The gear pump takes its suction from the hydraulic reservoir. When the cutting decks are in a stationary position, flow from the gear pump is by--passed through the lift/lower control valve, counterbalance manifold, oil filter and traction charge circuit. To raise a side cutting deck, the appropriate lift lever on the lift/lower control valve is pulled to allow valve shift in the lift/lower control valve. This valve change allows hydraulic pressure to the piston end of the lift cylinder and causes the cylinder shaft to extend, raising the cutting deck. Oil from the rod end of the cylinder flows to the traction charge circuit. When the lift lever is released, the lift cylinder and cutting deck are held in position. To raise the front cutting deck, the center lift lever on the lift/lower control valve is pulled to allow valve shift in the lift/lower control valve. This valve change allows hydraulic pressure to the rod end of the front deck lift cylinders, causing the cylinders to retract. As the cylinders retract, the front deck raises. Oil from the piston end of the cylinders returns to the hydraulic reservoir. When the lift lever is released, the lift cylinders and cutting deck are held in position. An adjustable counterbalance valve (CB) in the counterbalance manifold maintains back pressure on the deck lift cylinders to allow some of the cutting deck weight to be transferred to the traction unit to improve traction. A relief valve located in the lift/lower control valve limits lift/ lower circuit pressure to 1500 PSI (103 bar). Excess circuit flow is routed to the oil filter and then to the traction charge circuit. Hydraulic System Groundsmaster 4000--D Page 4 - 17 Hydraulic System
Page 1 and 2: Part No. 08161SL (Rev. A) Service M
Page 3 and 4: Table Of Contents Chapter 1 - Safet
Page 5 and 6: Table of Contents GENERAL SAFETY IN
Page 7 and 8: Maintenance and Service 1. Before s
Page 9 and 10: Safety and Instruction Decals Numer
Page 11 and 12: Chapter 2 Product Records and Maint
Page 13 and 14: Torque Specifications Recommended f
Page 15 and 16: Standard Torque for Dry, Zinc Plate
Page 17 and 18: Chapter 3 Kubota Diesel Engine Tabl
Page 19 and 20: Specifications Item Make / Designat
Page 21 and 22: Removal (Fig. 1) 1. Park machine on
Page 23 and 24: Removal (Fig. 5) CAUTION B The muff
Page 25 and 26: DANGER Because diesel fuel is highl
Page 27 and 28: Removal (Fig. 8) 1. Park machine on
Page 29 and 30: CAUTION Do not open radiator cap or
Page 31 and 32: CAUTION One person should operate l
Page 33 and 34: Coupler Removal (Fig. 16) NOTE: The
Page 35 and 36: Chapter 4 Hydraulic System Table of
Page 37 and 38: General Information Operator’s Ma
Page 39 and 40: Hydraulic Hose and Tube Installatio
Page 41 and 42: Adjustable Fitting (Fig. 8) 1. Make
Page 43 and 44: Hydraulic System This page is inten
Page 45 and 46: Traction Circuit: 4WD (Mow) The tra
Page 47 and 48: Traction Circuit: Transport (2WD) T
Page 49: Lower Cutting Deck A four section g
Page 53 and 54: Mow Hydraulic flow for the mow circ
Page 55 and 56: Hydraulic System This page is inten
Page 57 and 58: Steering Circuit A four section gea
Page 59 and 60: Engine Cooling Fan Circuit A four s
Page 61 and 62: Hydraulic Test Fitting Kit This kit
Page 63 and 64: Problem Traction power is lost or u
Page 65 and 66: Testing The most effective method f
Page 67 and 68: Procedure for Traction Circuit Char
Page 69 and 70: Procedure for Traction Circuit Reli
Page 71 and 72: Procedure for Counterbalance Pressu
Page 73 and 74: Procedure for Rear Traction Circuit
Page 75 and 76: Procedure for Traction Circuit Redu
Page 77 and 78: Procedure for Cutting Deck Circuit
Page 79 and 80: Procedure for PTO Relief Pressure T
Page 81 and 82: Procedure for Cutting Deck Motor Ca
Page 83 and 84: Procedure for Cutting Deck Gear Pum
Page 85 and 86: Procedure for Steering Circuit Reli
Page 87 and 88: Procedure for Lift/Lower Circuit Re
Page 89 and 90: Procedure for Steering and Lift/Low
Page 91 and 92: Procedure for Engine Cooling Fan Ci
Page 93 and 94: Procedure for Engine Cooling Fan Ci
Page 95 and 96: Service and Repairs General Precaut
Page 97 and 98: Charge Hydraulic System NOTE: When
Page 99 and 100: NOTE: The front frame needs to be l
Page 101 and 102:
Removal (Fig. 48) CAUTION The radia
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Removal (Fig. 49) 1. Park machine o
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IMPORTANT: Use caution when clampin
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Hydraulic System This page is inten
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Removal (Fig. 59) 1. Read the Gener
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4WD Manifold Service (Fig. 60) 1. M
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Page 125 and 126:
Traction Manifold Service (Fig. 62)
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Filter Manifold Service (Fig. 64) F
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CAUTION The centering springs are u
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Disassembly (Fig. 70) 1. Pump oil o
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8. Remove and discard back--up gask
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Fan Drive Manifold Service (Fig. 78
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Cutting Deck Motor Removal 1. Park
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IMPORTANT: Mark the relative positi
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PTO Manifold Service (Fig. 88) For
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Disassembly (Fig. 91) 1. Plug all p
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Disassembly (Figs. 94 and 95) 1. Re
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Chapter 5 Electrical System Table o
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Special Tools Order special tools f
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Troubleshooting CAUTION Remove all
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Cutting Deck Operating Problems The
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Component Testing For accurate resi
Page 185 and 186:
Warning Lights Engine Oil Pressure
Page 187 and 188:
Transport / 4WD Switch The transpor
Page 189 and 190:
Seat Switch The seat switch is norm
Page 191 and 192:
Hour Meter The hour meter is locate
Page 193 and 194:
Start, Engine Shutdown, Seat, PTO,
Page 195 and 196:
TEC -5002 Controller Groundsmaster
Page 197 and 198:
Fuel Gauge The fuel gauge can be te
Page 199 and 200:
Glow Controller The glow controller
Page 201 and 202:
Dual Temperature Switch The dual te
Page 203 and 204:
Traction Neutral Switch The tractio
Page 205 and 206:
Fusible Link Harness The Groundsmas
Page 207 and 208:
Engine Coolant and Hydraulic Oil Te
Page 209 and 210:
Battery Service The battery is the
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Battery Charging To minimize possib
Page 213 and 214:
Chapter 6 Axles, Planetaries and Br
Page 215 and 216:
General Information Operator’s Ma
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3. Chock rear wheels and jack up fr
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This page is intentionally blank. A
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NOTE: The planetary wheel drive ass
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NOTE: The planetary wheel drive ass
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This page is intentionally blank. A
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8. Remove cap screw and flange nut
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Bevel Gear Case and Axle Case The f
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Bevel Gear Case and Axle Case Insta
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9. Remove the bevel gear case/axle
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Axle Shafts The following procedure
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7. Secure the lock nut with the sta
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Differential Gear Inspection 1. Mea
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Pinion Gear to Ring Gear Engagement
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Chapter 7 Chassis Table of Contents
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Disassembly (Fig. 1) 1. Park machin
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Removal (Fig. 2) 1. Park machine on
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Rear Arm Removal (Fig. 8) 1. Park m
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This page is intentionally blank. C
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IMPORTANT: Support yoke when removi
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Disassembly (Fig. 15) 1. Disassembl
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NOTE: Most of the seat suspension c
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Removal 1. Park machine on a level
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Chapter 8 Cutting Decks Table of Co
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General Information CAUTION Never i
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This page is intentionally blank. C
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Removal (Fig. 1) 1. Position machin
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Removal (Fig. 5) 1. Position machin
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Removal (Figs. 10 and 11) 1. Park m
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2. Install outer bearing spacer int
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Chapter 9 Foldout Drawings Table of
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COUNTERBALANCE MANIFOLD FRONT PTO M
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CONTINUES FROM SHEET 1 CONTINUES FR
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CONTINUES TO SHEET 2 CONTINUES TO S
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Groundsmaster 4000--D Engine Wire H
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PINK Groundsmaster 4000--D Front Wi
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YELLOW GRAY YELLOW/BLACK VIOLET WHI
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