Part of the New Holland Repair Manuals.
Need the factory book for your New Holland BC5070 square baler? This 660-page service manual (OEM #47917636) also covers the BC5050, BC5060, BC5070 Hayliner®, and BC5080, so you're not stuck guessing which chapter applies to your frame. Inside you get hydraulic schematics for the variable displacement pump, bale density circuit, and pickup lift circuit, plus a full knotter and twister section covering timing adjustment, clutch and brake service, and needle-to-plunger timing. Set your PTO limit to the 540 RPM maximum, and torque 37° flared tube nuts anywhere from 12-16 N-m on the small sizes up to 305-325 N-m on the big ones. Chasing a knotter that won't tie is miserable work without the timing marks in front of you. This PDF carries bookmarks straight to every system, so you jump from the twister frame to the trip mechanism without flipping 600 pages by hand.
What's Inside This New Holland BC5050–BC5080 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 6-41 | Foreword - Important Notice Regarding Equipment Servicing, Safety Rules (-: Personal Safety, Ecology and the Environment), Torque – Minimum Tightening Torques for Normal Assembly |
| Power Take-Off (PTO) - 31 | 42-149 | Power Take-Off Drive Shaft, Flywheel, Gearbox, Clutches |
| Hydraulic Systems - 35 | 150-203 | Hydraulic Systems, Variable Displacement Pump, Bale Density Circuit, Pickup Lift Circuit, Frame Positioning Swinging |
| Product Feeding - 60 | 204-297 | Feeder Housing, Feeder Drive System, Pickup, Packer, Rotor |
| Pressing - Bale Formation - 62 | 298-335 | Plunger and Connecting Rod, Bale Chamber |
| Knotter Drive System | 336-346 | Bearing Removal, Bearing Installation, Shaft Replacement, Woodruff Key, Clamp Bolt |
| Knotter Clutch and Brake | 347-362 | Clutch Overview, Brake Adjustment, Brake Pad Replacement, Brake Disc Replacement, Clutch Dog removal/install, Timing Marks |
| Knotter Trip Mechanism | 363-396 | Metering Wheel Specification, Trip Arm Overview, Trip Stop Adjustment, Drive Gear removal/install, Metering Wheel Shaft and Supports, Bale Counter replacement/adjust |
| Needles | 397-442 | Needle Overview, Needle to Plunger Timing, Needle Penetration Adjustment, Needle Roller Replacement, Needle Yoke removal/install, Needle Protection Latch |
| Knotter Assembly (Stack, Twine Guide, Frame) | 443-560 | Knotter Stack End Play, Knotter Timing Adjustment, Standard/heavy Duty Knotter Frame, Billhook Cam and Spring, Twine Disk and Cleaners, Twine Finger Adjustment |
| Twister Frame | 561-602 | Twister Frame Height, Hook and Shaft System, Unloading Roller replacement/adjust, Shear Plate Pressure Test, Shuttle Bar and Shaft, Twist Wrapper and Wire Guides |
| Twister Drive System & Clutch/Brake | 603-660 | Twister Stack Overview, Twister Timing Adjustment, Twister Clutch and Drive Gear, Needle Drive and Brake, Shaft Bushing removal/install, Clutch Timing Check |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Wheel lug hardware torque specification | to the specifications for the tire size as listed in the wheel torque table | p. 11 |
| Torque for Tube nuts for 37° flared fittings (Size 4) | 12 – 16 N·m (9 – 12 lb ft) | p. 25 |
| Torque for Tube nuts for 37° flared fittings (Size 32) | 305 – 325 N·m (225 – 240 lb ft) | p. 25 |
| Maximum PTO operating speed | 540 RPM | p. 15 |
| Maximum angle for single universal joint operation | over 20 ° | p. 47 |
| Front drive chain deflection | 9.5 mm (3/8 in) | p. 76 |
| Pickup drive belt torque | minimum of 200 N·m (147.5 lb ft) and a maximum of 265 N·m (195.5 lb ft) | p. 266 |
| BC5050 | ||
| BC5050 Overall width | 2745 mm | p. 28 |
| Main drive slip clutch torque | 678 N·m (500 lb ft) | p. 138 |
| BC5060 | ||
| BC5060 Weight - twine | 1542 kg | p. 30 |
| BC5070 Hayliner® | ||
| BC5070 Hayliner® Tractor requirement (PTO Hp) | 56 kW (75 Hp) | p. 30 |
| BC5060, BC5070, BC5070 Hayliner®, BC5080 | ||
| Main drive slip clutch torque | 1015 N·m (750 lb ft) | p. 138 |
New Holland BC5050–BC5080 Series Common Problems This Manual Covers
New Holland BC5050 main drive slip clutch slipping under load, bales inconsistent density
Check the clutch spring length first; on the BC5050 it should measure 28.7 mm (1.13 in) uncompressed. Adjust the spring nut until torque setting reaches 678 N·m (500 lb ft), verified with a spring scale pulled at the 152 cm (60 in) mark on page 138. Burnish the clutch through several slip cycles before returning to the field.
Manual Section: Main drive slip clutch - Adjust p. 137Pickup won't lift or drops unexpectedly, metering wheel feed uneven at low ground speed
Verify the pickup drive belt idler spring length reads 283 to 287 mm (11.1 to 11.3 in); a collapsed spring lets the belt slip and starves the pickup lift circuit. Torque the belt idler bolt to 200 to 265 N·m (147.5 to 195.5 lb ft) on page 266. Check the trip arm and metering wheel adjustment per the troubleshooting chart before condemning the hydraulic cylinder.
Manual Section: Pickup - Problem solvingNeedles bending or breaking off at the yoke during the tie cycle
Check needle to plunger timing clearance; it must fall between 6 and 19 mm (0.24 to 0.75 in) as specified on page 406. A tight or misaligned yoke forces the needle into the plunger path and snaps it. Inspect the pivot pin for wear and confirm the shear bolt hasn't been swapped for a hardened substitute, which masks an overload instead of protecting the needle.
Manual Section: Needles - Troubleshooting p. 397Knots hanging on the billhook or twine pulling loose after the knotter cycles
Measure knotter stack end play; pull force should read 4.9 to 5.8 kgf (11 to 13 lbf) per page 471. Excess play lets the billhook rotate out of sync with the twine disc, so the knot slips off before it sets. Clean the billhook cam surface and check twine finger tension before adjusting shims, since a gummed cam is the more common culprit than worn bearings.
Manual Section: Knotter stack - Troubleshooting p. 443Hydraulic bale tension losing pressure, plunger backing off under heavy windrows
Adjust the relief valve locknut until the pressure gauge holds steady at 1100 psi maximum, the documented upper limit for the bale tension circuit on page 171. If pressure won't hold, pull the variable displacement pump and inspect the vanes, rotor, and shaft for scoring. Torque any reconnected size 32 tube nuts to 305 to 325 N·m (225 to 240 lb ft) so the leak doesn't return from the fitting itself.
Manual Section: Hydraulic Systems - 35 p. 150Twister wire wrap loose or hook missing the bale wire on final knot
Check twister hook height above the bale case; it needs to sit within 56.5 to 58.5 mm (2-7/32 to 2-9/32 in) of the case surface. Confirm the drive chain deflection doesn't exceed 6.3 mm (1/4 in), since a stretched chain throws the hook out of time with the twist wrapper. Re-tension the chain and recheck hook height together, adjusting one without the other rarely holds.
Manual Section: Twist wrapper - Adjust p. 579Frequently Asked Questions
What is the weight of the flywheel for the BC5050 model?
The flywheel assembly for the BC5050 model weighs 100 kg (220 lb). This information is part of the flywheel assembly specifications. p. 73
What is the gearbox oil capacity for BC5050, BC5060, and BC5070 models?
The gearbox oil capacity for BC5050, BC5060, and BC5070 models is 2.5 L (2.6 US qt) when using NEW HOLLAND AMBRA HYPOIDE 90 gear oil. p. 36
What is the plunger operating speed for the BC5050 model?
The plunger on the BC5050 model operates at a speed of 79 strokes per minute when the tractor PTO drives the flywheel at 540 RPM. p. 71
What is the factory setting for the main drive slip clutch spring length on the BC5050 model?
For the BC5050 model, the factory setting for the main drive slip clutch spring length (A) is 28.7 mm (1.13 in). This adjustment should be made after burnishing the slip clutch discs. p. 137
How quickly can I access this New Holland BC5050–BC5080 Series manual after?
You get a 660-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print this New Holland BC5050–BC5080 Series manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Does this New Holland BC5050–BC5080 Series manual cover the hydraulic system?
Yes. The manual includes hydraulic circuit diagrams, system schematics, and component specifications with pressure ratings.
