Macdon 9250 SP User Manual Page 94
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Form # 46584 Issue 11/06 Web Rev_01
92
MAINTENANCE/SERVICE
Header Drive: Hydraulics
FLOW CONTROL BLOCK
Flow control block (A), located under cab near ground speed linkage, provides hydraulic power to the header.
The block divides pump output of 19 gallons per minute (gpm) and controls the flow of oil into two circuits.
Flow is used by the various headers as follows:
Auger Header
Both circuits combine to supply oil to the reel drive. Flow can be varied from 6 to 19 gpm with either reel or
conveyor speed control knob on cab console.
Harvest Header and Multi-Crop Header
The flow to each circuit (reel and conveyor) can be varied from 3 to 9 gpm.
Header Drive Relief Pressure
Overload protection for the reel and conveyor
drives is provided by an internal relief valve in flow
control block (A). Should stalling problems develop
with one of the header hydraulic circuits, check
and adjust relief pressure as follows:
1. Attach a 3000 psi (20 MPa) pressure gauge to a
hose that is long enough to allow pressure
gauge to be read from the operator's seat.
Attach pressure gauge hose to female coupler
(E) at the tractor right hand leg and position the
gauge to be visible from the seat.
2. Set controls as follows:
• Start engine and run at operating speed.
• Move header drive switch to engaged position.
• Adjust reel speed control to minimum. (Reel
should be turning slowly.)
3. Pressure should be 2200 to 2350 psi (15.2 to
16.2 MPa). If not, proceed with adjustment:
4. Move header drive switch to disengaged
position. Shut off engine and remove key.
5. To adjust relief setting:
• Loosen jam nut at relief valve (B).
• Turn the adjustment screw in 1/4 turn
increments, clockwise to increase pressure,
counter-clockwise to decrease.
6. Repeat checking and adjustment until relief
pressure is correct, then tighten jam nut at (B).
IMPORTANT: If relief pressure does not increase
after adjusting the screw two or three times, check
relief valve as follows: Remove relief valve (B)
from flow control block. Check that no contaminant
is preventing the spring-loaded poppet from
properly seating against the valve body. Clean as
required, and reinstall valve. Reset adjustment
screw to original position before checking relief
pressure.
HEADER DRIVE FLOW CONTROL BLOCK
NOTE: For hydraulic schematics, see
“SCHEMATICS” section at back of this
book.
A
B
HEADER DRIVE FLOW CONTROL BLOCK
E
ATTACH PRESSURE GAUGE
- 9250/9350/9352 1
- SELF-PROPELLED 1
- WINDROWER 1
- Proposition 65 Warning 2
- INTRODUCTION 3
- TABLE OF CONTENTS 4
- SERIAL NUMBER LOCATIONS 7
- SAFETY 10
- SPECIFICATIONS 13
- SPECIFICATIONS 14
- TORQUE SPECIFICATIONS 15
- TORQUE SPECIFICATIONS 16
- OPERATOR'S STATION 17
- Symbol Definitions 17
- OPERATOR'S STATION 19
- Mac-Monitor 19
- Mac-Monitor: 20
- Operator Presence System 21
- Speedometer 21
- Ignition Switch 22
- OPERATOR'S STATION 23
- Cab Temperature Controls 23
- Windshield Wiper Control 23
- Windrower Controls 24
- Header Controls 25
- Header Controls (continued) 26
- Seat Belts 27
- Seat Adjustments 28
- Operator Amenities 29
- OPERATION 30
- To the New Operator 30
- Break-in Period 31
- OPERATION 32
- Pre-Starting Checks: Annual 32
- Pre-Starting Checks: Daily 33
- Start-Up Procedure 34
- Driving the Windrower 36
- Stopping Procedure 40
- Leaving the Windrower 41
- Attaching the Header 42
- (continued) 44
- Adding Rear Weight 45
- Detaching the Header 47
- Header Angle 50
- HEADER TILT HYDRAULIC 50
- ADJUSTMENT 50
- Header Levelling 51
- Header Flotation 52
- Transporting the Windrower 53
- Storage Procedure 58
- Service Procedures 59
- Fuels, Fluids and Lubricants 61
- 50 Hours (continued) 64
- 200 Hours or Annually 65
- Diesel Engine 67
- Diesel Engine (continued) 69
- Diesel Engine: Fuel System 73
- Engine Exhaust System 78
- Engine Cooling System 79
- Electrical System 82
- Hydraulic System 91
- Header Drive: Hydraulics 94
- Traction Drive: Hydraulics 99
- MAINTENANCE/SERVICE 100
- Steering Checks 100
- MAINTENANCE/SERVICE 101
- Steering Checks (continued) 101
- Troubleshooting 103
- Procedure (continued) 105
- Friction Device Adjustment 106
- AT HALF-WEAR STAGE 110
- MAINTENANCE/SERVICE 111
- Traction Drive: Park Brake 111
- Cab Air System 112
- Maintenance Schedule 115
- MAINTENANCE RECORD 117
- (continued) 118
- TROUBLE SHOOTING 119
- Electrical 127
- Traction Drive System 128
- Header Hydraulics 131
- Header Drive 131
- TROUBLE SHOOTING 132
- Header Drive (continued) 133
- Park Brake 133
- Operator's Seat 133
- OPTIONS AND ATTACHMENTS 134
- UNLOADING 135
- Prepare to Unload 135
- Two Forklift Method 135
- UNLOADING 136
- One Forklift Method 136
- ASSEMBLY 137
- Install Tires 137
- ASSEMBLY 140
- Battery 140
- ASSEMBLY 141
- Adjustments and Checks 141
- Cab Heater 141
- Preparing the Tractor for 142
- Preparing 972 Harvest Header 145
- Radio Installation 146
- Two-Way Radio Installation 147
- Tool Box 147
- Swath Roller 148
- INDEX 150
- Self-Propelled Windrower 153
- Pre-Delivery Checklist 153
- Roof Wiring Schematic 155
- Cab Wiring Schematic 156
- Tractor Wiring Schematic 157
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