Great-plains DVN8324 Operator Manual User Manual Page 64
- Page / 78
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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60 8315-8324DVN Great Plains Manufacturing, Inc.
550-466M 11/25/2013
Machine pulling to one
side
Parking brakes partially or fully engaged on
that side
Release parking brakes on both sides prior
to movement.
See “Dragging brake” topic. Check “wheel lockup” causes before flat
spots develop on tires.
Brakes always
engaged, all wheels
Machine parking brakes on during move-
ment
Release parking brakes prior to movement.
Over-extended adjuster Reset adjuster pawls and allow system to
self-adjust.
Air/Hydraulic system: Tractor air brake lines
reversed, and Supply line is causing brakes
to be always on
Reverse air line connections at hitch.
Hydraulic/Hydraulic system: machine brake
line connected to incorrect always-on
remote.
Connect machine brake line to correct
remote.
Pressure supplied by tractor brake line is
always too high (hydraulic), or too low (air
brake)
Maximum allowed hydraulic pressure is:
150 bar / 2175 psi.
Minimum required air pressure is:
550 kPa / 80 psi
Dragging brake Over-extended adjuster Reset adjuster. Inspect to discover why it
overextended.
Debris in brakes Remove brake shoes. Clean and dry.
Distorted brake parts scraping Replace damaged parts.
Weak return spring Replace all springs.
Piston seized in brake cylinder Rebuild or replace cylinder.
Ice in parking brake lines Warm and release lines. Check lines for
damage. Avoid cold weather movements
until cables are replaced.
Brakes grab, chatter or
rattle
Weak return springs Replace all springs.
Drum worn, distorted or out of round Re-surface drum if run-out is within specifi-
cation, otherwise replace.
Under-inflated or undersize tire in pair Replace tire if inflation to specification does
not solve unequal contact problem.
Loose, worn, damaged or missing brake
components in hub
Inspect brakes.
Loose or worn wheel bearings Replace bearings.
Flat spots on tires See ““Brakes always engaged, all wheels”
Squealing from brakes Worn brake linings Check brakes. Replace worn linings
(page 50).
Distorted brake parts scraping Check brakes. Replace damaged parts.
Problem Causes Solutions
- Operator Manual 1
- Table of Contents Index 2
- Table of Contents 3
- Equipment Identification 5
- Machine Record 6
- Introduction 7
- Description of Unit 7
- Using This Manual 8
- Owner Assistance 8
- Important Safety Information 9
- Wear Protective Equipment 10
- Use Safety Chains 10
- Avoid High Pressure Fluids 10
- Keep Riders Off Machinery 10
- Tire Safety 11
- Use Safety Lights and Devices 11
- Transport Machinery Safely 11
- Shutdown and Storage 11
- Practice Safe Maintenance 12
- Safety At All Times 13
- Accident Prevention 13
- Safety Decals and Lights 14
- Reflectors: Fluorescent Panels 15
- Reflectors: Red 15
- Reflectors: Orange 15
- EXCESSIVE SPEED HAZARD 16
- Danger: Crush 17
- Danger: Electrocution 17
- Warning: Wing Crushing 18
- Warning: High Pressure Fluid 18
- Warning: Hand Pinch 18
- 848-530C REV A 18
- Caution: Read Operator Manual 19
- Caution: Tires Not A Step 19
- Notice: Transport Lock 19
- Danger: Cutting of Foot 19
- Preparation and Setup 20
- 11/25/2013 550-466M 21
- Clevis Hitch 22
- Category III Hitch 22
- Electrical Hookup 23
- Brake Hook-up (Option) 24
- Air Brake Hook-up 25
- Hydraulic Brake Hook-up 26
- Operating Instructions 27
- Unfolding and Folding 28
- Unfolding 30
- 550-466M 11/25/2013 32
- Lowering 33
- Transporting the Discovator 35
- Brake Operation (option) 37
- Transport 39
- Field Operation 40
- First Time Field Adjustments 41
- Side to Side Leveling 42
- Disc Gang Depth Calibration 42
- Scraper Settings 43
- Rear Attachment Settings 44
- Coil Tine Settings 45
- Reel Settings 45
- Unfolded Storage 46
- Maintenance and Lubrication 47
- Maintenance Lift Lock 48
- Wheel Bearing Hub 49
- All Hinge Points 49
- Brake Maintenance (Option) 50
- Air Brake Maintenance 52
- Brake Shoe Replacement 54
- Brake Drum Maintenance 58
- Mounting Wheels 59
- Test and Adjust Brakes 59
- Troubleshooting 60
- Coulter/Disc Gang Performance 61
- General Performance 61
- Sweep/Shank Performance 62
- Brakes (Option) 63
- Problem Causes Solutions 64
- Retract Kit (Option) 65
- Appendix 66
- Torque Values Chart 67
- Tire Inflation Chart 68
- Appendix 65 69
- Appendix 67 71
- Warranty 73
- Salina, Kansas 67402-5060 USA 78
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