All 258 pages of this CNH Repair Manual cover three engines, the F4GE0484E, F4GE0684F, and F4HE0684J, used in Case 521D, 621D, and 721D wheel loaders. Open it and you get a full diagnostics section walking through six failure trees (engine won't start, overheats, lacks power, exhaust smoke, irregular knock, unexpected shutdown), plus a dedicated overhaul chapter for the F4GE0484E and a combined chapter for the F4GE0684F and F4HE0684J variants with exploded views, system diagrams, and a dedicated Recharging and Start-Up section. Wiring diagrams and hydraulic schematics are both in here, and the torque tables are factory-verified: torque connecting rod cap screws to 30 ± 5 Nm on the first pass, 50 ± 5 Nm on the second, then rotate an additional 60° ± 5°. Your machine is down and forum threads won't give you a three-phase rod torque sequence. Download now, search any spec by keyword, and bring it right to the shop floor.
What's Inside This CNH F4GE0484E, F4GE0684F, F4HE0684J Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 3-4 | To the Reader, Further References, Page Number, Symbols, Unit of Measure |
| Diagnostics | 7-22 | Engine won’t Start, Engine Overheats, Engine Lacks Power and Works Erratically, Engine Exhaust Smoke Black or Dark Grey, Engine Knocks Irregularly, Engine Stops |
| Engine F4Ge0484E Overhaul | 23-106 | Coding of Source Engines, Main Engine Features, Assembling Play -- Specifications, Tightening Torque, Description of Main Mechanic Engine Components, Engine Bench--Overhaul |
| Engines F4GE0684F / F4HE0684J Overhaul | 107-252 | Engine |
| Recharge and Start--Up | 253-258 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Connecting rod cap fastening screws torque (1st phase) | 30 ± 5 Nm | p. 36 |
| Connecting rod cap fastening screws torque (2nd phase) | 50 ± 5 Nm | p. 36 |
| Fuel filter torque | contact + 3/4 turn | p. 36 |
| Engine Bore | 104 mm | p. 28 |
| Engine Stroke | 132 mm | p. 28 |
| F4GE0484E, F4GE0684F | ||
| Valve spring height (under 329 N load) | 49.02 mm | p. 98 |
| Rocker arm shaft diameter | 18.963 ÷ 18.975 mm | p. 35 |
| Rocker arm diameter | 19.000 ÷ 19.026 mm | p. 35 |
| F4GE0484E | ||
| Fuel filter cartridge filtration degree | 6 micron | p. 58 |
| Engine Total Displacement | 4485 cm³ | p. 28 |
| Engine Compression Ratio | 17.5 : 1 | p. 28 |
| F4GE0684F, F4HE0684J | ||
| Engine Total Displacement | 6728 cm³ | p. 112 |
CNH F4GE0484E, F4GE0684F, F4HE0684J Common Problems This Manual Covers
Engine produces a loud ticking or clattering noise from the valve gear under normal load.
Inspect the valve train and measure valve spring height under a 329 N load. Verify the height is 49.02 mm for F4GE0484E and F4GE0684F models on page 98. Check for broken springs or excessive stem play, and adjust rocker arms if needed.
Manual Section: Engine Knocks Irregularly p. 98Engine lacks power and works erratically while displaying a fuel filter fault code on the monitor.
Drain the fuel lines and replace the filter element. For F4GE0484E models, install a new 6 micron filtration cartridge as noted on page 58. Lubricate the new seal with clean diesel fuel and torque the filter to contact plus a 3/4 turn.
Manual Section: Engine Lacks Power and Works Erratically p. 58Cylinder head emits persistent tapping noises indicating improper tappet seating or loose rocker arm play.
Remove the valve cover and measure clearance between the rocker arm and valve stem. Adjust the intake valve clearance to 0.25 ± 0.05 mm for F4GE0484E and F4GE0684F engines on page 100. Torque the nut for the rocker arm adjusting screw to 25 ± 5 Nm.
Manual Section: Engine Knocks Irregularly p. 100Frequently Asked Questions
How to troubleshoot engine won't start?
To troubleshoot an engine that won't start, first check if the connections to battery terminals are in working order; if not, clean, check, tighten, or replace clamp nuts. Next, verify if the batteries and starter motor are in working order, carrying out checks described in the “Electric system” repair manual if needed. Then, check the thermal starter and replace it if it's not in working order, and finally, verify the injection pump timing as described in the relevant chapter. p. 9
What torque specifications are listed?
The manual lists various torque specifications for engine components. For instance, cylinder head fastening screws (M12x1.75x70) require 50 ± 5 Nm (5 ± 0.5 kgm) in the 1st phase. Connecting rod cap fastening screws need 30 ± 5 Nm (3 ± 0.5 kgm) in the 1st phase, 50 ± 5 Nm (5 ± 0.5 kgm) in the 2nd phase, and then an angular tightening of 60°± 5° in the 3rd phase. p. 36
What are the common electrical problems?
Common electrical problems for the starter motor include batteries running down, oxidized or loose circuit connections, worn brushes, short-circuited field windings, or a faulty electromagnet. For the alternator, issues can be an interruption of the recharge circuit (e.g., warning light, fuse), a faulty voltage regulator, interrupted rotor winding, worn brushes, excessive wear of rotor rings, short-circuited diodes, or earth faults. p. 255
How do you fix CNH F4GE0484E engine exhibits a deep metallic clatter and knock detected in connecting rods?
Remove the oil pan and check crankpin assembling play. Verify the connecting rod axial play is 0.10 to 0.33 mm as shown on page 85. If clearance exceeds specs, replace bearings and torque cap fastening screws to 30 ± 5 Nm for the first phase. p. 17
What do I get after purchasing this CNH F4GE0484E, F4GE0684F?
You get a 258-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 manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Are hydraulic system diagrams in this CNH F4GE0484E, F4GE0684F?
Yes. The manual includes hydraulic circuit diagrams, system schematics, and component specifications with pressure ratings.
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