All 212 pages of this Case IH HDX Sickle Header Service Manual (OEM #47851906) zero in on four machines: the HDX122, HDX142, HDX162, and HDX182, covering every system from the wobble box up through the roll conditioning gearbox. Inside you get complete wiring diagrams with wire connector pinouts, chopping and cutting control system schematics, and electrical component localization across all four headers. Open to the procedures section and you'll find reel drive system remove and install sequences, sickle cutterbar overhaul, wobble box teardown, and roll conditioning timing adjustments, all backed by exploded views throughout the manual. The sickle runs at 1810 strokes per minute; top the conditioner gearbox to exactly 0.59 l before you button it back up. Your machine is down and you're not guessing at connector pinouts. Bookmarked to every major section and searchable on any device; pull it up at the machine, not back at the shop desk.
What's Inside This Case IH HDX122/HDX142/HDX162/HDX182 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 4-25 | Safety Rules, Torque – Minimum Tightening Torques for Normal Assembly, Torque – Standard Torque Data for Hydraulics, Basic Instructions - Shop and Assembly, Consumables |
| Hydraulic Systems | 26-45 | Dynamic Description, Component Localization, Reel - Static Description - Variable Hydraulic Reel Speed, Reel Drive Motor, Reel Drive System - Remove, Reel Drive System - Install |
| Electrical Systems | 46-87 | Electrical System Component Localization, Wire Connectors, Wiring Harnesses, External Lighting General Specification, Chopping and Cutting Control Systems |
| Attachments and Headers | 88-173 | Attachment/Header Reel Control System, Attachment/Header Reel, Attachment/Header Feed Auger, Attachment/Header Cutting Mechanism, Sickle Cutterbar, Wobble Box |
| Product Feeding | 174-212 | Pickup Reel Static Description, Auger Static Description, Roll Conditioning Dynamic Description, Roll Conditioning Remove Driveline, Roll Conditioning Timing Adjust |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Header drive Hydraulic flow | 110 l/min (29 US gpm) | p. 18 |
| Conditioner gearbox capacity | 0.59 l (0.62 US qt) | p. 18 |
| Sickle speed | 1810 strokes per minute | p. 18 |
| Reel diameter | 1066 mm (42 in) | p. 18 |
| Auger speed | 287 RPM | p. 18 |
| Roll diameter | 263 mm (10.35 in) | p. 18 |
| Metric non-flanged hardware torque, Class 8.8 bolt/nut, M4 | 2.9 N·m (26 lb in) | p. 9 |
| Pipe thread fitting torque, 1/8–27 inch | 13 N·m (10 lb ft) | p. 15 |
| Turn signal and/or hazard lights Voltage | 12 V | p. 71 |
| HDX122 | ||
| Cutting width | 3.73 m (12.24 ft) | p. 18 |
| HDX182 | ||
| Header weights (shipping) with rubber rolls | 1983 kg (4372 lb) | p. 18 |
Case IH HDX122/HDX142/HDX162/HDX182 Common Problems This Manual Covers
Case IH HDX sickle header knife not reaching rated speed, cutting crop uneven and ragged
Check the knife speed sensor wiring for continuity and opens in the Electrical Systems section. Verify belt tension on the sickle drive and inspect wobble box input shaft bearings. Rated sickle speed is 1810 strokes per minute (page 18); if the sensor reads low speed at normal RPM, disassemble the wobble drive to check bearing condition.
Manual Section: Electrical Systems - 55Variable hydraulic reel drive motor leaking oil or not maintaining consistent reel speed p. 36
Remove the variable hydraulic reel drive motor per the procedure on page 36. Verify system hydraulic flow reaches 110 l/min (29 US gpm) before condemning the motor. Inspect shaft seal, port O-rings, and end cap for wear. Replace damaged seals, then torque all pipe thread connections to 13 N·m (10 lb ft) as shown on page 15.
Manual Section: Hydraulic Systems - 35Wobble box vibrating excessively or making grinding noise during sickle header operation
Inspect the wobble drive assembly in the Attachment/Header Cutting Mechanism section for worn input shaft bearings, cracked seals, and loose housings. Disassemble the wobble drive and measure bearing preload and end-play against spec. Torque all fasteners to the values in the standard torque table on page 9 during reassembly. Recheck sickle speed is 1810 strokes per minute after reassembly.
Manual Section: Attachments/Headers - 58Conditioner rolls not crushing crop stems uniformly, windrow mat thin or uneven
Adjust roll gap in the Product Feeding section to match your crop; measure gap width with a feeler gauge end-to-end across the 263 mm (10.35 in) diameter rolls. Top up conditioner gearbox oil to the full mark; capacity is 0.59 l (0.62 US qt) per page 18. Inspect roll flutes for flat spots and replace worn rolls in pairs.
Manual Section: Product Feeding - 60Pickup reel timing incorrect, crop bunching at cutterbar or wrapping around reel bats
Adjust reel position and timing following the service instructions in the Attachment/Header Reel Control System section. Set bat angle uniform across all bats and verify reel height clears the cutterbar correctly for your crop type. The reel is 1066 mm (42 in) in diameter (page 18); use this reference when calculating tine-to-cutter clearance during adjustment.
Manual Section: Attachments/Headers - 58Left-hand header turn signal not working after sickle adaptor kit installation on windrower p. 73
Test left-hand header flashing light circuit continuity following the diagnostic procedure on page 73, with the sickle header adaptor kit fully installed. Check for 12 V at the turn signal connector and verify ground path continuity through the full harness. Inspect each connector pin for corrosion or spread contacts and repair before retesting the circuit.
Manual Section: Electrical Systems - 55Frequently Asked Questions
How do you fix case IH HDX sickle header knife not reaching rated speed, cutting crop uneven and ragged?
Check the knife speed sensor wiring for continuity and opens in the Electrical Systems section. Verify belt tension on the sickle drive and inspect wobble box input shaft bearings. Rated sickle speed is 1810 strokes per minute (page 18); if the sensor reads low speed at normal RPM, disassemble the wobble drive to check bearing condition.
How do you fix variable hydraulic reel drive motor leaking oil or not maintaining consistent reel speed?
Remove the variable hydraulic reel drive motor per the procedure on page 36. Verify system hydraulic flow reaches 110 l/min (29 US gpm) before condemning the motor. Inspect shaft seal, port O-rings, and end cap for wear. Replace damaged seals, then torque all pipe thread connections to 13 N·m (10 lb ft) as shown on page 15.
How do you fix wobble box vibrating excessively or making grinding noise during sickle header operation?
Inspect the wobble drive assembly in the Attachment/Header Cutting Mechanism section for worn input shaft bearings, cracked seals, and loose housings. Disassemble the wobble drive and measure bearing preload and end-play against spec. Torque all fasteners to the values in the standard torque table on page 9 during reassembly. Recheck sickle speed is 1810 strokes per minute after reassembly.
How do you fix conditioner rolls not crushing crop stems uniformly, windrow mat thin or uneven?
Adjust roll gap in the Product Feeding section to match your crop; measure gap width with a feeler gauge end-to-end across the 263 mm (10.35 in) diameter rolls. Top up conditioner gearbox oil to the full mark; capacity is 0.59 l (0.62 US qt) per page 18. Inspect roll flutes for flat spots and replace worn rolls in pairs.
How will I receive this Service Manual?
A 212-page Service Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Am I able to print pages from this manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Does this Service Manual have electrical diagrams?
Yes, this Case IH HDX122 & variants Service Manual includes complete electrical wiring diagrams, wire routing, and connector pinouts.
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