Toro Reelmaster 5100-D - Chapter 4 Hydraulic System

Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Test No. 2:Traction Circuit S
ystem Pressure . . . 27
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 3 Test No. 3: Front Mow/Lift Circuit Pressure . . . . 28
Hydraulic Hoses . . . . . . . . . . . . . . . . . . . . . . . . . 3 Test No. 4: Rear Mow Circuit P
ressure . . . . . . . 29
Hydraulic Fitting Inst
allation . . . . . . . . . . . . . . . . 3 Test No. 5: Reel Drive
Pump Efficiency . . . . . . . 30
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Test No. 6: Reel Drive Circuit Flow . . . . . . . . . . 31
HYDRAULIC SCHEMATIC. . . . . . . . . . . . . . . . . . . . 6 Test No. 7: Reel Drive Motor Efficiency
HYDRAULIC FLOW DIAGRA
MS . . . . . . . . . . . . . . . 7 and Mow Circuit Relief Pressure . . . . . . . . . . 32
Traction Forward . . . . . . . . . . . . . . . . . . . . . . . . . 7 ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Lower Cutting Units /
Mow . . . . . . . . . . . . . . . . . 8 Traction Control Neutral Adjustment . . . . . . . . . 33
Backlap – Front
. . . . . . . . . . . . . . . . . . . . . . . . . 10 Lift Circuit Variabl
e Orifice Adjustment . . . . . . . 34
Raise Cutting Units . . . . . . . . . . . . . . . . . . . . . . . 11 TRANSMISSION REPAIRS . . . . . . . . . . . . . . . . . . 35
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Shaft Seal
Replacement . . . . . . . . . . . . . . . . . . 35
TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . 15 Transmission Control Linkage Removal . . . . . . 36
Transmission Operates in One Direction Only . 15 Trunnion Seal Replacement . . . . . . . . . . . . . . . 37
Traction Pedal Does Not Check and High Pressure Relief Valves . . . . . . 38
Return to Neutral Properly . . . . . . . . . . . . . . . 15 Charge Pressure Relief Valve . . . . . . . . . . . . . . 39
Transmission Jerky When Starting . . . . . . . . . . 15 Heat Exchanger Bypa
ss Valve . . . . . . . . . . . . . 40
Transmission Oper
ating Hot . . . . . . . . . . . . . . . 16 Filter Bypass Valve . . . . . . . . . . . . . . . . . . . . . . 40
Loss of Traction Power or Filter Bypass Reverse Flow Check Valve
. . . . . 41
Unit Will Not Operate In Either Direction . . . . 17 Charge Pump . . . . . . . . . . . . . . . . . . . . . . . . . . 42
No Cutting Units Operate . . . . . . . . . . . . . . . . . 17 Transmission Removal and Install
ation . . . . . . . 43
Front Reel
s Will Not Turn in Either Direction. . . 18 Disassem
bly of Transmission . . . . . . . . . . . . . . 44
Front Reel
s Turn in Only One Direction . . . . . . . . Assembly of Transmission . . . . . . . . . . . . . . . . . 49
Front Reel
(s) Turn Too Slow . . . . . . . . . . . . . . . 19 MOWING CIRCUIT REPAIRS . . . . . . . . . . . . . . . . 54
Front Reels Turn Too Fast. . . . . . . . . . . . . . . . . 20 Valve Block Service . . . . . . . . . . . . . . . . . . . . . . 54
Front Reel
s Turn in Only One Direction . . . . . . 20 Cartridge Valve Service . . . . . . . . . . . . . . . . . . . 55
Front Reels Stop Under Load . . . . . . . . . . . . . . 20 Cartridge Valve Identification . . . . . . . . . . . . . . . 56
Front Reel
Speed Erratic. . . . . . . . . . . . . . . . . . 21 Pump Removal and Inst
allation . . . . . . . . . . . . . 58
Front Reel
s Stop or Pump Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Won’t Stop During Backlap Only . . . . . . . . . 21 Reel Motor Removal
and Installation. . . . . . . . . 61
Rear Cutting Unit Problems . . . . . . . . . . . . . . . 21 Reel Motor Shaft Seal
Replacement . . . . . . . . . 62
Cutting Unit(s) Will Not Raise
. . . . . . . . . . . . . . 22 Reel Motor Repai
r . . . . . . . . . . . . . . . . . . . . . . . 63
Cutting Units Raise, But Will Not Stay Up . . . . . 23 Lift Cylinder Removal and Installation . . . . . . . . 64
Cutting Units Raise Too Fast o
r Too Slow . . . . . 23 Lift Cylinder Repair
. . . . . . . . . . . . . . . . . . . . . . 65
Cutting Units Will Not Lower . . . . . . . . . . . . . . . 24 Flushing The Hydraulic Syst
em . . . . . . . . . . . . . 67
TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Inspecting Reservoir Parts . . . . . . . . . . . . . . . . 68
Test No. 1: Traction Circuit Charge Pressure . . 26
Reelmaster
®
5100-D Page 4 - 1
Rev. A
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