Table of Contents
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Table of Contents
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 3
Hydraulic Hose and Fitting Information . . . . . . . . 3
HYDRAULIC SCHEMATICS . . . . . . . . . . . . . . . . . . 5
Two (2) Wheel Drive . . . . . . . . . . . . . . . . . . . . . . 5
Four (4) Wheel Drive . . . . . . . . . . . . . . . . . . . . . . 6
HYDRAULIC FLOW DIAGRAMS . . . . . . . . . . . . . . . 7
General Charge Pump Flow . . . . . . . . . . . . . . . . 7
Traction Circuit - Forward . . . . . . . . . . . . . . . . . . 8
Mowing Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Lift/Lower Circuit - Lifting Cutting Units . . . . . . . 10
Steering Circuit - R.H. Turn . . . . . . . . . . . . . . . . . 11
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Hydraulic Pressure Test Kit . . . . . . . . . . . . . . . . 12
Hydraulic Tester. . . . . . . . . . . . . . . . . . . . . . . . . 13
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 14
System Operates Hot . . . . . . . . . . . . . . . . . . . . 14
Machine Travels in One Direction Only . . . . . . . 14
Traction Response is Sluggish . . . . . . . . . . . . . 15
Machine Will Not Travel in Either Direction . . . . 15
Four Wheel Drive Does Not Engage . . . . . . . . . 16
Four Wheel Drive Does Not Disengage . . . . . . 16
No Cutting Units Operate . . . . . . . . . . . . . . . . . 17
All Cutting Units Operate Slowly . . . . . . . . . . . . 18
One Cutting Unit Does Not Operate . . . . . . . . . 19
One Cutting Unit Operates Slowly
and/or Loses Power in Heavy Cutting . . . . . . 19
One Cutting Unit Will Not Stop Operating . . . . . 19
Cutting Unit(s) Do Not Lift or Lift Too Slowly . . . 20
Cutting Units Will Not Drop
or Follow Ground Contours . . . . . . . . . . . . . . 21
Cutting Unit(s) Drop From Raised Position
With Lift Valve in Centered Position . . . . . . . 21
Cutting Unit(s) Lower or Raise Too Quickly. . . . 22
Steering Loss . . . . . . . . . . . . . . . . . . . . . . . . . . 22
®
Reelmaster
335-D
Hydraulic System
TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Test No. 1: Checking Traction Circuit
Working Pressure or Relief Pressure. . . . . . . 24
Working Pressure or Relief Pressure. . . . . . . 26
Test No. 4: Checking Mowing Circuit Flow . . . . 27
Test No. 5: Checking Reel Motor Efficiency . . . 28
Test No. 6: Checking Steering Circuit
Working Pressure or Relief Pressure. . . . . . . 29
Test No. 7: Checking Lift Circuit
Working Pressure or Relief Pressure. . . . . . . 30
Test No. 8: Checking Charge Pressure
For Traction and Mowing Circuit . . . . . . . . . . 31
Rear Motor Pressure (4WD Only) . . . . . . . . . 32
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Traction Pump Neutral Adjustment . . . . . . . . . . 33
Reel Speed Control Adjustment . . . . . . . . . . . . 34
REPAIRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Removing Hydraulic System Components . . . . 35
SUNDSTRAND TANDEM PUMP REPAIRS . . . . . . 36
Shaft Seal Replacement . . . . . . . . . . . . . . . . . . 36
Trunnion Seal Replacement . . . . . . . . . . . . . . . 37
Check and High Pressure Relief Valves . . . . . . 38
Charge Pressure Relief Valve . . . . . . . . . . . . . . 39
Disassembly of Sundstrand Tandem Pump. . . . 40
Assembly of Sundstrand Tandem Pump . . . . . . 42
EATON PROPULSION PISTON PUMPS
REPAIR INFORMATION (Traction/Mow Pump)
EATON GEAR PUMP REPAIR INFORMATION
(Auxiliary/Steering Pump)
SUNDSTRAND SAUER 15 SERIES AXIAL PISTON
MOTOR SERVICE MANUAL
(Front Traction Motor)
EATON FIXED AXIAL PISTON MOTOR
REPAIR INFORMATION
(Rear Axle 4WD Traction Motor)
CESSNA DIRECTIONAL CONTROL VALVE
SERVICE MANUAL
EATON GEAR MOTOR REPAIR INFORMATION
(Cutting Unit Reel Motor)
EATON CHAR-LYNN STEERING CONTROL UNITS
REPAIR INFORMATION
Page 4 - 1
Chapter 4
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Troubleshooting
