Part of the New Holland Repair Manuals.
Hydraulic throwing and latch cylinders are the hardest thing on a bale thrower to diagnose without factory data, and this 20-page New Holland 75 service manual PDF, OEM 40007040, covers them. Four models are inside, two belt type and two pan type. Schematics trace oil from the pump through the relief and flow control valves to both cylinders, a wiring diagram maps the pan type's motor, actuator, control box, and breakaway connector, and troubleshooting tables link poor wagon filling or loose bales back to PTO speed, belt tension, and valve spool condition. Set the Model 70 pump drive belt spring at 6 inches (152.5 mm) hook to hook, and check output against the rated 9.5 GPM before condemning a valve. When the thrower quits mid-field, nobody is beside you with the answer. Print the pages for the job, let them catch grease on the bench, and keep the bookmarked, text-layer PDF as your master copy.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction, General Information and Safety | 1-3 | Equipment Orientation (Left Side, Right Side and Direction of Travel) Together with the Safety Precautions Covering Loose Clothing, Moving Parts, Shields and Clutch Engagement |
| Models 70 and 72 Belt Type - Hydraulic System | 4-5 | Hydraulic Pump, Relief Valve and Flow Control Valve Feeding the Throwing Cylinder and Latch Cylinder, With the Throwing Belt Driven Off the Motor Sheave |
| Models 70 and 72 Belt Type - Flow and Pressure Test Procedure | 6 | Gauge and Flow Meter Hookup with the Pump, Motor and Relief Valve Settings Checked Against PTO Speed |
| Models 70 and 72 Belt Type - Troubleshooting | 7-9 | Wagon Filling Faults Traced Through Pump Drive Belt Tension, Throwing Belt Tension and Roll Speed; Sheave Change From 8 Inch to 8 3/4 Inch with Part Numbers 859420, 859421 and Belt 9600753; Expected 2900 PSI at 9.5 GPM on the Model 70 and 11.4 GPM on the Model 72 |
| Models 75 and 77 Pan Type - Hydraulic System | 10-11 | Hydraulic Pump, Relief Valve and Flow Control Valve Feeding the Pan Cylinder, Worked Through the Lock-Out Handle and Manual Trip Handle with the Distance Control Indicator Dial |
| Models 75 and 77 Pan Type - Flow and Pressure Test Procedure | 12-13 | Cessna Gear Model 24507-Lae Pump Rated 26 GPM at 1740 RPM (540 PTO RPM), Relief Valve Maximum 2250 Plus or Minus 50 PSI and Minimum 800 Plus or Minus 50 PSI, Plus the Indicator Setting to Pressure and Minimum GPM Guideline Table |
| Models 75 and 77 Pan Type - Electrical System | 14 | Electrical Circuit for the Pan Type Thrower Covering Motor and Actuator Wiring with the Control Box, Breakaway Connector and Circuit Breaker |
| Models 75 and 77 Pan Type - Troubleshooting | 15-20 | Wagon Filling and Bale Density Faults Traced Through PTO Speed, Valve Spool and Latch Cylinder Operation |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Model 70 pump drive belt adjustment | 6 inches (152.5 mm) from inside to inside spring hook | p. 8 |
| Model 70 roll drive belt adjustment | 1/8 inch (3 mm) gap between coils of the spring | p. 7 |
| Model 70 motor sheave replacement | 8 3/4 inches (222 mm) sheave halves | p. 8 |
| Maximum Bale Weight | 80 lbs | p. 7 |
| 70 | ||
| Model 70 Hydraulic Pump Capacity | 9.5 GPM | p. 5 |
| Model 70 Reservoir Capacity | 5 gallons | p. 5 |
| 72 | ||
| Model 72 Hydraulic Pump Capacity | 11.4 GPM | p. 5 |
| 70, 72 | ||
| Relief Valve Pressure Setting | 2900 PSI | p. 5 |
| 75, 77 | ||
| Model 75/77 Hydraulic Pump Capacity | 26 GPM | p. 11 |
| Relief Valve Adjustment Range | 800-2250 PSI | p. 11 |
| Model 75/77 Reservoir Capacity | 9 gallons | p. 11 |
