Part of the New Holland Repair Manuals.
Keep a CR7.90 or CR8.90 Rotary Combine cutting with New Holland service manual 48040948. This is the English edition CNH Industrial Latin America printed in December 2017. It covers Brazilian CR7.90 units from PIN JJAY7090VDG118504, Argentine CR7.90 units and Brazilian CR8.90 units from PIN JHFY8090EFJ405949.
The book gives the hydrostatic system maximum of 450 bar (6525 psi), the front engine mounting nut torque of 217 Nm (160.1 lb ft) and the other figures you need at the bench.
It runs from the main gearbox and feeder through the rotor, cleaning shoe and unloading auger. It includes hydraulic and electrical schematics and fault codes, but not engine overhaul. Check your PIN against the printed starts before you order.
What's Inside This New Holland CR7.90, CR8.90 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction, Safety and Specifications | 1-70 | Applicability, International Symbols, Safety Rules, Product Identification, Lubricant Capacities, General Specifications |
| Engine | 71-200 | Engine Removal and Installation, SCR Exhaust Treatment, Cooling System, Fan Drive, Aftercooler, Rotary Screen, Engine Lubrication, Air Compressor |
| Main Gearbox and Drive | 201-280 | Main Clutch Packs, Unload Clutch, Gearbox Bearings and Races, Gearbox Removal, Disassembly and Assembly, Oil Filling |
| Transmission | 281-376 | Mechanical Transmission, External Controls, Drive Shaft, Driven Shaft, Gearbox Internal Components, Differential |
| Front Axle | 377-464 | Powered Front Axle, Final Drive Hubs, Steering Knuckles and Shafts, Heavy-Duty and Planetary Final Drives |
| Rear Axle | 465-490 | Powered Guide Axle, Two-Speed Power Guide Axle, Electrical Description, Axle Height Adjustment |
| Hydrostatic Drive | 491-608 | Transmission and Steering Control, Ground Speed Potentiometer Testing, Reservoir and Lines, Pump and Motor, Hydrostatic Pressure Testing, Rear Hydrostatic Transmission |
| Brakes and Controls | 609-652 | Hydraulic Service Brakes, Brake Calipers, Parking Brake, Brake Removal and Installation |
| Hydraulic Systems | 653-924 | Hydraulic Schema, Reservoir and Filters, Variable Displacement Pump, Main Control Valve, Header Height and Tilt, Reel Control, Chaff Spreader, Grain Tank Unload |
| Steering | 925-972 | Steering Control, Hydraulic Control Components, Steering Pump, Steering Cylinders, Autoguidance Steering |
| Wheels | 973-990 | Wheel Bolt Repair Kit, Broken Wheel Bolts, Drilling Guides, Thread Cutting, Threaded Inserts |
| Tracks and Track Suspension | 991-1174 | Track Frame, Driving Wheels, Tracks, Track Tension Units, Track Rollers, Pivot Seals |
| Cab Climate Control | 1175-1320 | Heating, Ventilation, Air Conditioning, Compressor, Pressure Testing, Refrigerant, Troubleshooting |
| Electrical Testing, Harnesses and Connectors | 1321-1895 | Circuit Testing Methods, Electrical Schematic Sheets, Harnesses, Connectors, Component Diagrams, Voltage Sources, Fuse and Relay Box Testing |
| Engine, Drive and Cab Electrical Controls | 1896-2015 | Engine and SCR Controls, Starting and Battery, Electronic Modules, Gearbox and Hydrostatic Controls, Brake Controls, Hydraulic Controls, HVAC Controls |
| Harvesting Electrical Controls | 2016-2145 | Cab Harvesting Controls, Header Height and Leveling, Feeding and Threshing Controls, Cleaning Controls, Material Flow, Precision Farming, Lighting, Instruments |
| Fault Codes | 2146-3472 | Ccm, Rhm, DCU and ECU Fault Codes, Fault Causes, Diagnostic Solutions, Fault Code Index |
| Product Feeding | 3473-3606 | Floating Roll, Feed Chain, Feeder Housing, Feeder Shafts, Feeder Drive, Stone Trapping System |
| Threshing | 3607-3818 | Threshing Torque and Speeds, Mechanism Drive, Rotor, Rotor Housing, Rotor Variator, Concaves, Concave Control |
| Separation | 3819-3918 | Beater, Discharge Beater, Rotary Separator, Straw Walkers and Shafts, Straw Walker Drive |
| Residue Handling | 3919-4024 | Positive Straw Discharge, Straw Chopper, Chopper Drive, Chaff Spreader, Opti-Spread |
| Cleaning | 4025-4284 | Self-Leveling Frame, Cleaning Drives, Grain Pan, Upper and Lower Shaker Shoe, Fan Housing, Fan Drive Flow Tests, Tailings Return |
| Crop Storage and Unloading | 4285-4444 | Clean Grain Elevator, Elevator Clutch Torque Checks, Grain Tank, Unload Drive, Unloading Augers, Horizontal Unloading Tube |
| Platform, Cab, Bodywork and Special Tools | 4445-4545 | Cab, Cab Interior, Protections and Footboards, Operator Seat, Shields and Guards, Special Tool Index |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine rated speed | 2100 RPM | p. 64 |
| Engine low idle speed | 1000 RPM | p. 64 |
| Engine high idle speed | 2100 RPM | p. 64 |
| Battery | 2 x 12 V- 92 A·h | p. 64 |
| Alternator | 190 A 12 V | p. 64 |
| Transmission | 4 speed hydrostatic | p. 65 |
| Hydraulic system maximum pressure | 210 bar (3046 psi) | p. 64 |
| Steering valve maximum pressure | 185 bar (2683 psi) | p. 64 |
| Hydrostatic system maximum pressure | 450 bar (6525 psi) | p. 64 |
| Cleaning fan speed | 210 - 1100 RPM | p. 63 |
| Discharge beater speed | 800 RPM | p. 62 |
| Unloading drive gearbox oil | 0.6 l (0.16 US gal) | p. 63 |
| Unloading tube length | 5.5 m (18 ft) | p. 63 |
| Unloading tube length with 6 ft extension | 7.3 m (24 ft) | p. 63 |
| Drive tire option | 800/65R32 172A8 R1W / 900/60R32 176A8 R1W | p. 57 |
| Front engine mounting nuts torque | 217 Nm (160.1 lb ft) | p. 75 |
| Engine to gearbox cap screws torque | 41 - 51 Nm (30.2 - 37.6 lb ft) | p. 75 |
New Holland CR7.90, CR8.90 Common Problems This Manual Covers
Ground speed potentiometer test shows no continuity
Test N°2 in the hydrostatic drive section traces a no-continuity reading to an open circuit between connector X027 pin 1 and connector X057 pin C, on wire 381 yellow. Find the open circuit along that wire and repair it. The test sits in the Transmission and steering hydrostatic control part of the Hydrostatic drive chapter, under Ground speed potentiometer testing.
Manual Section: Hydrostatic drive - Transmission and steering hydrostatic control - Testing p. 514Ground speed circuit still fails after the RHM software is reloaded
Test N°6 covers the case where you reload the RHM software and the circuit still does not work. The manual's conclusion is that the RHM has failed and must be replaced. The test belongs to the same Ground speed potentiometer testing sequence in the Hydrostatic drive chapter.
Manual Section: Hydrostatic drive - Transmission and steering hydrostatic control - Testing p. 516Cab air conditioning gives no cooling at all
The air conditioning troubleshooting chart lists the A/C Mode switch being off as a cause of no cooling. Turn the A/C Mode switch on and check the result before you connect gauges, touch the refrigerant or start pulling components.
Manual Section: Cab climate control - Air conditioning - Troubleshooting General p. 1309Cab air conditioning cools, but not enough
For insufficient cooling, the troubleshooting chart points to a dirty condenser core. Inspect the condenser core visually and clean it as necessary. The chart is in the Air conditioning part of the Cab climate control chapter, next to the no-cooling causes.
Manual Section: Cab climate control - Air conditioning - Troubleshooting General p. 1309Frequently Asked Questions
Which New Holland CR combines does this service manual cover?
This is New Holland service manual 48040948, in English, dated December 2017 from CNH Industrial Latin America. It covers the CR7.90 built in Brazil from PIN JJAY7090VDG118504, the CR7.90 built in Argentina and the CR8.90 built in Brazil from PIN JHFY8090EFJ405949. The engine codes are F3AE9684A*E001 for the CR7.90 and F3BE3684B*E002 for the CR8.90. The book says it does not contain the service procedures for the 9 Liter, 10.3 Liter or 13 Liter engines. An engine overhaul needs the separate engine manual. p. 2
What engine speeds and electrical system ratings does the manual list?
Rated speed is 2100 RPM, low idle is 1000 RPM and high idle is 2100 RPM. The battery spec is 2 x 12 V, 92 A·h, and the alternator is 190 A at 12 V. p. 64
What hydraulic, steering and hydrostatic pressures does the manual give?
Hydraulic system maximum pressure is 210 bar (3046 psi). The steering valve maximum is 185 bar (2683 psi). The hydrostatic system maximum is 450 bar (6525 psi), and the transmission is a 4 speed hydrostatic. p. 64
What cleaning and unloading specifications are included?
The cleaning fan runs from 210 to 1100 RPM and the discharge beater turns at 800 RPM. The unloading tube is 5.5 m (18 ft) long, or 7.3 m (24 ft) with the 6 ft extension. The unloading drive gearbox takes 0.6 l (0.16 US gal). p. 63
Does the manual include electrical and hydraulic schematics and fault codes?
Yes. The Harnesses and connectors chapter has electrical schematic sheets with component lists, such as Electrical schematic sheet 03 SH03 - STARTING. The Hydraulic systems chapter has the hydraulic schema, and the Hydrostatic drive chapter has the hydrostatic schema. The FAULT CODES chapter gives a diagnostic procedure for each code. Two examples are E0013-05 - Cleaning Fan RPM Sensor - Line Disconnected and E0016-05 - Clean Grain Elevator RPM Sensor - Line Disconnected. p. 1353
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