Part of the New Holland Repair Manuals.
This 656-page New Holland E15 Shop Manual (OEM #87360157 NA) puts the complete factory teardown for your Hydraulic Excavator in one PDF. Open it up and you get wiring diagrams for the electrical system, full hydraulic schematics covering the pump, control valve, pilot valve, and slewing motor unit, plus dedicated troubleshooting sections for overheating under load and jerky, sluggish hydraulic response. You also get the engine section: disassembly, inspection, reassembly, lubrication, and fuel injection pump/governor work, all laid out the way New Holland techs actually work. Torque that 3/4-inch O-ring fitting to 12±0.5 kgf·m (87±4 ft-lbs), and heed the pinhole-leak warning on page 15 before you go hunting hydraulic leaks with your bare hand. No more flying blind on a machine that's bleeding oil somewhere you can't see. Bookmarked for fast jumps between sections; pull it up on your phone and get back under the machine.
What's Inside This New Holland E15 Manual
| System | Pages | Key Topics |
|---|---|---|
| Standard Specifications and Maintenance | 7-78 | General Information and Safety, Specifications, Location and Weight of Components, Maintenance Standard and Test Procedures, Torque Specifications and Working Standard |
| Systems | 79-248 | Hydraulic System, Upper Structure, Travel System, Attachments, Control System, Electrical System |
| Components | 249-396 | Hydraulic Pump, Control Valve, Pilot Valve (Attachment, Standard), Ab Shifter), 2-Function Solenoid Valve (with Relief Valve), Slewing Motor Unit |
| System Troubleshooting | 397-438 | Swivel Joint, Hydraulic Cylinders, Troubleshooting Processes, Diagnostics Table and Abbreviations Table, Engine (E/G), Pumps |
| Engine | 439-656 | General, Inspection and Adjustment, Troubleshooting, Disassembly, Inspection and Reassembly of Engines, Lubrication System, Fuel Injection Pump/Governor |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for O-ring type, 3/4 screw size | 12±0.5 kgf·m (87±4 ft-lbs) | p. 71 |
| Tightening torque for O-ring type, 1 screw size | 14±0.5 kgf·m (101±4 ft-lbs) | p. 71 |
| Water temperature sensor (E/G) | 124250-49351 | p. 194 |
| Alternator Rated revolution | 4,800 r.p.m | p. 195 |
| Alternator Current | 20A | p. 200 |
| Fuel sensor resistance (Ω) at FULL float position | 10 | p. 308 |
New Holland E15 Common Problems This Manual Covers
New Holland E15 hydraulic pump grinding noise with slow, jerky lift, can't raise heavy loads
Check the hydraulic pump troubleshooting chart on for no oil delivery or pressure that won't rise. Inspect the plate seal and back-up ring on page 267; replace if worn, a common failure point. Torque the pump lock nut to 2.8-3.2 kgf·m (20-23 ft-lbs) per page 293, then bleed air from the lines before testing lift under load.
Manual Section: Hydraulic Pump Troubleshooting p. 267Invisible high-velocity oil stream penetrating skin from pinhole leaks in hydraulic lines
Never search for hydraulic leaks with your bare hand. Per the safety warning on page 15, pinhole leaks release an invisible high-velocity oil stream that penetrates skin; sweep suspect lines with cardboard instead. Replace the leaking line and torque O-ring fittings to 12±0.5 kgf·m (87±4 ft-lbs) for 3/4 size per page 71. Seek medical help immediately for suspected injection injury.
Manual Section: General Information and Safety p. 15Machine overheating with noticeable power loss during operation after running under heavy load
Check the engine troubleshooting table on page 514 for output drop caused by high load or high ambient temperature. Clean or replace a clogged air filter per page 514, and inspect the drive V-belt deflection, spec'd at 10-14 mm on page 485; a loose belt starves the water pump and drives up temperature. Verify coolant flow before resuming heavy work.
Manual Section: Engine Troubleshooting (Yanmar Service Manual) p. 514Jerky movements and slow response times in hydraulic controls when operating the boom
Run the control valve troubleshooting chart on for stuck spools or load that won't hold. Check for sticking sliding parts noted on page 309, contamination is the usual cause. Flush and refill with clean hydraulic fluid, then use a calibrated pressure gauge to bring relief valve pressure back to the specified level per page 267, before retesting.
Manual Section: Control Valve TroubleshootingStarting failure with flickering dashboard lights and weak cranking when turning the key
Check the starting motor troubleshooting chart on for cranks-but-won't-start conditions. Inspect battery terminals and wiring connectors for corrosion, a common root cause of intermittent power and flickering gauges. Test electrolyte specific gravity; a fully charged battery reads 1.28 at 20°C per page 489. Clean and re-torque every ground connection before condemning the starter.
Manual Section: Starting Motor TroubleshootingTransmission slippage with gears sticking or failing to engage smoothly under load
Inspect the clutch pack push rod for wear; replace it once wear reaches 1 mm (0.04 in) or more per page 460. Adjust the clutch adjust nut and torque it to 7±0.5 kgf·m (51±4 ft-lbs) per page 307, keeping the gap between plate and push rod below 0.2 mm (0.008 in). Recalibrate and road test before returning to service.
Manual Section: Torque Specifications and Working Standard p. 307Frequently Asked Questions
What are the torque specifications for New Holland E15 engine bolts?
For the 3TNV82A engine, the cylinder head bolts should be tightened in two steps: first to 30.0~34.0 Nm (3.1~3.5 kgf·m) and then to 61.7~65.7 Nm (6.3~6.7 kgf·m). The connecting rod bolts for the same engine should be tightened to 37.2~41.2 Nm (3.8~4.2 kgf·m). p. 654
How do you reset the hydraulic pressure on a New Holland E15?
To adjust the main relief valve pressure, first connect a pressure gauge to the inlet circuit. Then, turn the adjuster clockwise to increase pressure or counter-clockwise to decrease it. The standard setting pressure for P1 and P2 is 195±5 kgf/cm² (2770±70 PSI) at 15 ℓ/min (4.0 gal/min).
What are the torque specifications for the New Holland E15 dozer blade pivot?
The tightening torque for the dozer blade is 3.0±0.3 kgf·m (22±2 ft·lbs). p. 171
How do you reset the New Holland E15 hydraulic system?
To reset the hydraulic system after maintenance, perform air bleeding. This involves running the engine at low idle after loosening the upper drain plug of the hydraulic pump and slewing motor until clear hydraulic oil is visible. Then, run the engine for more than 5 minutes at low speed without load to bleed air from the travel motor and hydraulic cylinders. Finally, perform a series of digging, slewing, and travel operations to bleed air from the pilot line. p. 17
How quickly can I access this New Holland E15 manual after buying?
Immediate download of the complete 656-page searchable Shop Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Can I print this New Holland E15 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 there wiring harness diagrams in this New Holland E15 manual?
Yes. You'll find full electrical schematics with wire routing diagrams, connector identification, and circuit descriptions.
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